Wave power generation device and wave power generation system

Abstract

To efficiently convert the vertical motion of a floating body caused by wave action into electric power in a wave power generation device in which a rotating part rotates about the axis of a power generation rotary shaft supported by the floating body to generate electricity.SOLUTION: A wave power generation device 1 comprises: a floating body 2 that floats on a fluid surface S; a rotating part 3 that rotates about the axis of a power generation rotary shaft 23 supported by the floating body; and a power generation unit 4 that generates electricity by the rotation of the rotating part about the axis of the power generation rotary shaft. The floating body is configured to be rotatable about the axis of an eccentric rotary shaft 23 that passes through a position offset horizontally from the center of buoyancy of the floating body. The floating body is provided with a suppression unit 81 for suppressing vertical movement of the eccentric rotary shaft when the vertical movement of the floating body is generated by the vertical movement of the fluid surface (the rise and fall of the fluid surface).SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a wave power generation device and a wave power generation system that generate electricity by utilizing the power of waves (or ocean waves).

Background Art

[0002] Conventionally, there is known a wave power generation device that generates electricity by rotating a rotating part around the axis of a rotating shaft part (rotating shaft part for power generation) supported by a floating body floating on a fluid surface such as a water surface or a sea surface. In such a wave power generation device, due to the movement of waves causing the floating body to rotate around its axis, the rotating part rotates around the axis of the rotating shaft part supported by the floating body, and electric power is generated from the rotational motion (see Patent Documents 1 to 3, etc.).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, a conventional wave power generation device that generates electricity by rotating a rotating part around the axis of a rotating shaft part for power generation supported by a floating body has a problem that it is difficult to efficiently convert the vertical movement of the floating body caused by the movement of waves into electric power.

Means for Solving the Problems

[0005] In order to solve the above-described problems, the present invention provides a wave power generation device including a floating body floating on a fluid surface, a rotating part that rotates around the axis of a power generation rotating shaft part supported by the floating body, and a power generation part that generates power by the rotation of the rotating part around the axis of the power generation rotating shaft part, wherein the floating body is configured to be rotatable around an eccentric rotating shaft part passing through a position horizontally eccentric with respect to the center of buoyancy of the floating body, and the device is characterized by including a suppressing part that suppresses the vertical movement of the eccentric rotating shaft part when the vertical movement of the floating body occurs due to the vertical movement of the fluid surface.

Effect of the Invention

[0006] According to the present invention, in a wave power generation device that generates power by the rotation of a rotating part around the axis of a power generation rotating shaft part supported by a floating body, the vertical movement of the floating body caused by the movement of waves can be efficiently converted into electric power.

Brief Description of the Drawings

[0007]

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Embodiments for Carrying Out the Invention

[0008] Hereinafter, embodiments of the wave power generation device according to the present invention will be described with reference to the drawings. In the following description, the case where the wave power generation device is used offshore (at sea) will be taken as an example for explanation. However, as long as there are fluid waves or swells, it is not limited to offshore (at sea), and it may be used on the water surface of rivers, lakes, etc., along the coast, on the fluid stored in artificial structures such as pools, etc.

[0009] First, an embodiment of a wave power generation unit provided with a plurality of wave power generation devices according to the present invention will be described. FIG. 1 is a perspective view showing the main part of the wave power generation unit in this embodiment. FIG. 2 is a perspective view of the wave power generation device in which the wave power generation unit of this embodiment is provided. FIG. 3 is a side view of the wave power generation device of this embodiment. FIG. 4 is a perspective view of the wave power generation device of this embodiment when viewed from a direction different from that of FIG. 2.

[0010] As shown in FIG. 1, the wave power generation device 1 of this embodiment is supported by a unit base portion 81 as a support connection member of the wave power generation unit 80, and a plurality of wave power generation devices 1 are connected to each other and used. Of course, the wave power generation device 1 can also be used alone without being connected to other wave power generation devices 1.

[0011] In addition, the plurality of wave power generation devices 1 connected by the unit base portion 81 do not necessarily have the same configuration. For example, they may have floating bodies 2 with different shapes or dimensions (see FIG. 8 for example). Since the plurality of wave power generation devices 1 connected by the unit base portion 81 may be affected by waves differently depending on their arrangement positions, the configurations of the respective wave power generation devices 1 (such as the shape or dimensions of the floating body 2) may be made different according to the differences in the way they are affected by waves. Also, since the shape or dimensions of the floating body 2 that can be arranged may be different depending on the difference in the arrangement positions of the plurality of wave power generation devices 1 connected by the unit base portion 81, in such a case as well, the configurations of the respective wave power generation devices 1 (such as the shape or dimensions of the floating body 2) may be made different.

[0012] The wave power generation device 1 of the present embodiment mainly includes a floating body 2 floating on the sea surface which is a fluid surface, and a rotating part 3 and a power generation part 4 arranged inside the floating body 2. The wave power generation device 1 of the present embodiment has a mechanism in which the power generation part generates electricity when the rotating part 3 rotates around the axis of the power generation rotating shaft part supported by the floating body 2.

[0013] The floating body 2 includes, for example, a cylindrical case 21 having a cylindrical shape (hollow cylindrical shape) with a diameter of 2 to 3 m, and a lid portion 22 that seals the end face of the cylindrical case 21. The floating body 2 gives buoyancy to the wave power generation device 1 at sea (offshore) and floats on the sea surface. The rotating part 3 and the power generation part 4 are arranged in the internal space of the cylindrical case 21, and the end face of the cylindrical case 21 is sealed by the lid portion 22 to prevent the intrusion of seawater.

[0014] The dimensions of the cylindrical case 21 are appropriately selected. However, when floating at sea (offshore) as in the present embodiment, considering that the average height of waves in the open ocean is approximately 1.5 m to 2.0 m, it is preferably in a cylindrical shape with a diameter of 2 to 3 m. Note that the shape of the floating body 2 is not particularly limited, and it may not be a cylindrical shape, but may be a rectangular shape, an oval shape, or other shapes.

[0015] The cylindrical case 21 of the present embodiment is a transparent member (light-transmissive member), and light can be transmitted from the inside of the cylindrical case 21 to the outside, or light from the outside can be transmitted into the cylindrical case 21. Thereby, for example, when a light-emitting part or the like is arranged in the cylindrical case 21, the light from the emitting part can be transmitted to the outside and emitted, or when a solar power generation part (photovoltaic power generation part) is arranged in the cylindrical case 21, the solar power generation part can be irradiated with external light to generate electricity. Further, since the cylindrical case 21 is a transparent member, the rotating part 3 and the power generation part 4 arranged inside the cylindrical case 21 can be visually recognized from the outside, and the states of the rotating part 3 and the power generation part 4 can be confirmed from the outside.

[0016] The cylindrical case 21 can be made of a resin material such as transparent polycarbonate or rigid polyvinyl chloride. Further, the cylindrical case 21 can also be made of a metal material such as stainless steel, aluminum, or an aluminum alloy. When it is made of a metal material, it is difficult to ensure transparency, but since it reflects electromagnetic waves, it is easy to be imaged by a radar or the like, which is beneficial in preventing danger.

[0017] On the two lid parts 22, 22 located at both end faces of the cylindrical case 21, eccentric rotation shaft parts 23, 23 extending parallel to the cylindrical central axis of the cylindrical case 21 are respectively provided. Specifically, on the two lid parts 22, 22, bearing parts 22a, 22a for rotatably supporting the respective eccentric rotation shaft parts 23, 23 are provided. Thereby, the lid parts 22, 22 and the cylindrical case 21 (that is, the floating body part 2) are configured to be rotatable about the axes of the eccentric rotation shaft parts 23, 23.

[0018] In this embodiment, the eccentric rotating shaft portions 23, 23 of each wave power generation device 1 are fixedly supported by a unit base portion 81 which is a support and connection member of the wave power generation unit 80. The unit base portion 81 can preferably be of a configuration in which, for example, an exterior member such as reinforced plastic is provided on a metal frame (rigid member). Note that in FIG. 1, only the frame portion of the unit base portion 81 is illustrated. Since the unit base portion 81 is a rigid member, the positional relationship of the eccentric rotating shaft portions 23 in the plurality of wave power generation devices 1 supported and connected by the unit base portion 81 is maintained in a predetermined positional relationship.

[0019] The rotating portion 3 is configured to rotate about the axis of the power generation rotating shaft portion supported by the floating body portion 2. Since the power generation rotating shaft portion of the present embodiment is configured coaxially with the eccentric rotating shaft portion 23, the rotating portion 3 is configured to rotate about the axis of the eccentric rotating shaft portion 23 as the power generation rotating shaft portion. The rotating portion 3 of the present embodiment is fixed to the inner wall surface of the lid portion 22 of the cylindrical case 21 and is integrally supported by the floating body portion 2, and the floating body portion 2 and the rotating portion 3 are configured to be integrally rotatable about the axis of the eccentric rotating shaft portion 23.

[0020] The rotating portion 3 of the present embodiment mainly includes two first frames 31, 31 which are rotatably attached to two eccentric rotating shaft portions 23, 23 rotatably supported by bearing portions 22a, 22a of the lid portions 22, 22 of the floating body portion 2 via bearing portions 31a, 31a respectively. The two first frames 31, 31 are connected to each other by two second frames 32, 32. Four fixing feet 31b extending toward the inner wall surfaces of the lid portions 22, 22 of the floating body portion 2 are provided on each of the first frames 31, 31, and each of the first frames 31, 31 is fixed to the inner wall surfaces of the respective lid portions 22, 22 by these fixing feet 31b. Thereby, the rotating portion 3 can rotate integrally with the floating body portion 2 about the axis of the eccentric rotating shaft portion 23.

[0021] In addition, the rotating part 3 is provided with a rotation transmission mechanism part for transmitting the rotational force (oscillating force) around the axis of the eccentric rotating shaft part 23 of the rotating part 3 (the first frame 31 and the second frame 32) to the power generation part 4. The rotation transmission mechanism part of the rotating part 3 of the present embodiment is provided only on one lid part 22 side of the floating body part 2.

[0022] The rotation transmission mechanism part is constituted by a gear mechanism including a first spur gear 33, a second spur gear 34, a third spur gear 35, and a fourth spur gear 36. The first spur gear 33 is fixed on the eccentric rotating shaft part 23. The second spur gear 34 and the third spur gear 35 are rotatably attached to a gear shaft 37 supported between one first frame 31 and the inner wall surface of one lid part 22 via bearings, and are configured to rotate integrally with each other. The second spur gear 34 meshes with the first spur gear 33 on the eccentric rotating shaft part 23, and the third spur gear 35 meshes with the fourth spur gear 36 fixed on the output shaft 38. The output shaft 38 is rotatably supported with respect to one first frame 31 via a bearing.

[0023] In the present embodiment, when the cylindrical case 21 of the floating body part 2 rotates around the axis of the eccentric rotating shaft part 23 due to the force of the wave, rotation (oscillation) around the axis of the eccentric rotating shaft part 23 also occurs in the first frame 31 of the rotating part 3 that rotates integrally with the floating body part 2. When the first frame 31 rotates around the axis of the eccentric rotating shaft part 23, the second spur gear 34 attached to the first frame 31 via the gear shaft rotates (revolves) around the axis of the gear shaft 37 while moving (revolving) around the circumference of the first spur gear 33 fixed on the eccentric rotating shaft part 23 in a state of meshing with the first spur gear 33.

[0024] The rotational force (oscillating force) of the second spur gear 34 around the axis of the gear shaft 37 is transmitted to the fourth spur gear 36 on the output shaft 38 via the third spur gear 35, causing the output shaft 38 to rotate around its axis. Normally, the cylindrical case 21 of the floating body 2 repeats clockwise and counterclockwise rotation (oscillation) around the axis of the eccentric rotating shaft portion 23 due to the force of the waves. Therefore, the second spur gear 34 repeats forward and reverse rotation (oscillation) around the axis of the gear shaft 37. Consequently, the output shaft 38 also repeats forward and reverse rotation (oscillation), and this forward and reverse rotation (oscillation) of the output shaft 38 is input to the power generation unit 4.

[0025] The power generation unit 4 generates electric power from the rotational force (oscillating force) output from the output shaft 38 of the rotation transmission mechanism portion of the rotation unit 3. The power generation unit 4 of this embodiment includes a power generation rotating shaft 41, a large bevel gear 42, two small bevel gears 43A, 43B, a first large spur gear 44, a first small spur gear 45, a gear shaft 46, a second large spur gear 47, a generator 48, and a flywheel 49.

[0026] The power generation rotating shaft 41 is rotatably supported between the second frames 32, 32 of the rotation unit 3 via bearings. The large bevel gear 42 is fixed to the tip of the output shaft 38 of the rotation transmission mechanism portion of the rotation unit 3. The two small bevel gears 43A, 43B are respectively attached to the power generation rotating shaft 41 via one-way clutches. The two small bevel gears 43A, 43B are arranged to mesh with the large bevel gear 42 facing each other from a direction orthogonal to the axial direction of the power generation rotating shaft 41.

[0027] In this embodiment, when the cylindrical case 21 of the floating body 2 rotates around the axis of the eccentric rotating shaft portion 23 due to the force of the waves, and as a result, the rotation unit 3 rotates (oscillates) around the axis of the eccentric rotating shaft portion 23, the output shaft 38 rotates (oscillates). That is, due to the pendulum motion of the rotation unit 3 around the axis of the eccentric rotating shaft portion 23, the output shaft 38 rotates (oscillates) so as to repeat forward and reverse rotation. Due to such rotation (oscillation) of the output shaft 38, the large bevel gear 42 fixed to the output shaft 38 also rotates (oscillates) so as to repeat forward and reverse rotation.

[0028] Here, in this embodiment, the two pinion gears 43A and 43B that mesh with the large bevel gear 42 are attached onto the power generation rotating shaft 41 via a one-way clutch as a one-way rotation transmission unit that transmits only rotational forces in opposite directions. Thereby, when the large bevel gear 42 rotates forward, the rotational force causes the first pinion gear 43A to rotate in the forward rotation direction by the first one-way clutch, and thereby the power generation rotating shaft 41 rotates in a specified direction. At this time, the second pinion gear 43B also rotates in the forward rotation direction by the rotational force when the large bevel gear 42 rotates forward, but the forward rotation force of the second pinion gear 43B is not transmitted to the power generation rotating shaft 41 by the second one-way clutch, so the second pinion gear 43B idles.

[0029] On the other hand, when the large bevel gear 42 rotates reversely, the rotational force causes the second pinion gear 43B to rotate in the reverse rotation direction by the second one-way clutch. Thereby, the power generation rotating shaft 41 rotates in the specified direction, similar to when the large bevel gear 42 rotates forward. At this time, the first pinion gear 43A also rotates in the reverse rotation direction by the rotational force when the large bevel gear 42 rotates reversely, but the reverse rotation force of the first pinion gear 43A is not transmitted to the power generation rotating shaft 41 by the first one-way clutch, so the first pinion gear 43A idles.

[0030] Note that there is no particular limitation on the tooth number ratio (gear ratio) between the large bevel gear 42 and the pinion gears 43A and 43B. However, by setting the input side as the large bevel gear and the output side as the pinion gears as in this embodiment, the rotational speed of the power generation rotating shaft 41 can be increased, improving the power generation efficiency. Also, the one-way rotation transmission unit may adopt a configuration other than a one-way clutch, such as a ratchet mechanism or the like.

[0031] A first large spur gear 44 is fixed to one end of the power generation rotating shaft 41, and a first small spur gear 45 is provided to mesh with the first large spur gear 44. The first small spur gear 45 is fixed to one end of a gear shaft 46 that is rotatably supported between the second frames 32 and 32 of the rotating part 3 via bearings. A second large spur gear 47 is fixed to the other end of the gear shaft 46. The second large spur gear 47 meshes with an input gear 48a fixed on the input shaft of the generator 48.

[0032] With the above configuration, when the power generation rotating shaft 41 rotates in a specified direction, the input shaft of the generator 48 rotates in the specified direction via the first large spur gear 44, the first small spur gear 45 on the gear shaft 46, and the second large spur gear 47. As a result, the rotor of the generator 48 rotates to generate electric power, and the electric power is output from the generator 48.

[0033] In this embodiment, when a rotating force (oscillating force) that repeats forward and reverse rotations is input to the power generation unit 4, both the rotating force during forward rotation and the rotating force during reverse rotation are input to the generator 48 as a rotating force that rotates the power generation rotating shaft 41 in a fixed direction (specified direction). If the output shaft 38 of the rotating unit 3 is directly connected to the generator 48, the power generation rotating shaft 41 of the generator 48 will repeatedly rotate forward and reverse in a sine wave manner, similar to the oscillation (pendulum motion) of the rotating unit 3. In such a case, the loss of kinetic energy due to the acceleration and deceleration of the power generation rotating shaft 41 when switching between forward and reverse rotations of the power generation rotating shaft 41 is large, and the power generation efficiency is significantly reduced. On the other hand, if the configuration is such that the power generation rotating shaft 41 of the generator 48 rotates in a fixed direction (specified direction) regardless of whether the forward or reverse rotating force of the oscillation (pendulum motion) of the rotating unit 3 is input, as in this embodiment, there is no switching between forward and reverse rotations of the power generation rotating shaft 41, and the loss of kinetic energy due to acceleration and deceleration during such switching can be avoided, significantly improving the power generation efficiency.

[0034] Furthermore, in this embodiment, a flywheel 49 is attached to the gear shaft 46. By providing the flywheel 49, when the rotational speed of the generator 48 (the rotational speed of the power generation rotating shaft 41) decreases, the generator 48 can continue to rotate by the kinetic energy accumulated in the flywheel 49. According to this, the rotational speed of the generator 48 (the rotational speed of the power generation rotating shaft 41) can be smoothed, and the power generation efficiency can be improved. Note that it is advantageous to install the flywheel 49 closer to the generator 48 side on the transmission path of the rotating force (oscillating force) because the flywheel 49 can be made lighter.

[0035] The electric power generated by the generator 48 of the power generation unit 4 is connected to a slip ring 50, which is a rotary connector, via a wiring 48b. The slip ring 50 is attached onto the other eccentric rotary shaft portion 23 located on the side opposite to one eccentric rotary shaft portion 23 where the rotary transmission mechanism portion of the rotary portion 3 is provided. As shown in FIG. 3, a power wiring 51 is passed through the inside of the other eccentric rotary shaft portion 23, and the power wiring 51 is connected to the slip ring 50. The electric power generated by the generator 48 of the power generation unit 4 is output from the wiring 48b, through the slip ring 50, and from the power wiring 51 to the outside.

[0036] In the present embodiment, since the floating body portion 2 and the rotary portion 3 may rotate one or more times around the axis of the eccentric rotary shaft portion 23, if the generator 48 on the rotary portion 3 and the power wiring 51 in the eccentric rotary shaft portion 23 are directly connected, the power wiring 51 may be twisted and disconnected. By connecting the generator 48 on the rotary portion 3 and the power wiring 51 in the eccentric rotary shaft portion 23 via the slip ring 50 as in the present embodiment, the wiring 48b and the power wiring 51 are not twisted and disconnected.

[0037] Here, generally, the movement (motion) of the floating body portion due to the movement of the wave can be roughly classified into a rotational motion, a vertical motion (movement along the vertical direction), and a lateral motion (movement along the horizontal direction). Among these motions, in a conventional wave power generation device that generates electricity by rotating a rotary portion around the axis of a power generation rotary shaft portion supported by a floating body portion, it is difficult to efficiently convert the vertical motion in which the floating body portion moves up and down due to the movement of the wave into electric power.

[0038] For example, when a rotating part that rotates around the axis of the power generation rotating shaft part is located at a horizontal position shifted from the horizontal position of the power generation rotating shaft part, if the vertical position of the power generation rotating shaft part supported by the floating body part changes in the direction opposite to the vertical component of the rotation direction of the rotating part due to the vertical movement of the floating body part, then such vertical movement acts to increase the rotation of the rotating part and can contribute to power generation. However, in other cases, for example, when the horizontal positions of the rotating part and the power generation rotating shaft part are the same as each other, or when the change in the vertical position of the power generation rotating shaft part due to the vertical movement of the floating body part is in the same direction as the vertical component of the rotation direction of the rotating part, then such vertical movement cannot increase the rotation of the rotating part and does not contribute to power generation, and instead may attenuate the rotation of the rotating part and inhibit power generation.

[0039] Therefore, in the present embodiment, in order to efficiently convert the vertical movement of the floating body part 2 due to the movement of the waves into the rotational movement of the rotating part 3 around the axis of the power generation rotating shaft part, the floating body part 2 is configured to be rotatable around the axis of the eccentric rotating shaft part 23, and a suppressing part is provided to suppress the vertical movement (height change) of the eccentric rotating shaft part 23 when the vertical movement (height change) of the floating body part 2 occurs due to the movement of the waves (vertical movement of the sea surface S). By suppressing the vertical movement (height change) of the eccentric rotating shaft part 23 by this suppressing part, the vertical movement of the floating body part 2 is converted into a rotational movement around the axis of the eccentric rotating shaft part 23, and the vertical movement of the floating body part 2 can be efficiently utilized for power generation by the power generation part 4.

[0040] FIG. 5 is an explanatory diagram for explaining the movement of the wave power generation device 1 of the wave power generation unit 80 in the present embodiment. In this embodiment, the unit base portion 81 of the wave power generation unit 80 that connects and supports a plurality of wave power generation devices 1 to each other, and the devices and members mounted on the unit base portion 81 function as the suppression portion described above. Specifically, for example, when the floating body portion 2 of any one of the wave power generation devices 1 attempts to rise due to the movement of the waves (sea level rise), the rise of the eccentric rotation shaft portion 23 of the wave power generation device 1 is suppressed by the weight of the unit base portion 81, which is a weight member of the wave power generation unit 80. Further, for example, when the floating body portion 2 of any one of the wave power generation devices 1 attempts to descend due to the movement of the waves (sea level fall), the descent of the eccentric rotation shaft portion 23 of the wave power generation device 1 is suppressed by the buoyancy of the floating body portion 2 of another wave power generation device 1 connected by the unit base portion 81 of the wave power generation unit 80.

[0041] The unit base portion 81 of the wave power generation unit 80 is disposed above a plurality (here, six) of wave power generation devices 1, supports the eccentric rotation shaft portion 23 of each wave power generation device 1, and floats on the sea surface by the buoyancy of the floating body portion 2 of each wave power generation device 1. When this wave power generation unit 80 is floated on the sea surface S0 without waves (when the sea surface heights at which all the wave power generation devices 1 float are the same), the weight balance of each wave power generation device 1 is designed so that it floats on the sea surface S0 in the posture shown in FIG. 6(a).

[0042] Specifically, the power generation portion 4 supported by the rotating portion 3 is arranged as the weight portion W on the opposite side of the eccentric rotation shaft portion 23 with respect to the cylindrical central axis O of the cylindrical case 21 of the floating body portion 2 of the wave power generation device 1. Thereby, when the wave power generation unit 80 is floated on the sea surface S0 without waves, each wave power generation device 1 is in a state where the eccentric rotation shaft portion 23 is located at substantially the same height as the cylindrical central axis O of the cylindrical case 21 of the floating body portion 2 and floats on the sea surface S0 as shown in FIG. 6(a). Note that weights may be appropriately arranged in the weight portion W for adjusting the weight balance.

[0043] On the one hand, as shown in Fig. 6(b), when the sea surface of the floating body 2 of any one of the wave power generation devices 1 (for example, the second and sixth wave power generation devices 1 from the left among the six wave power generation devices 1 shown in Fig. 5) connected to the unit base portion 81 of the wave power generation unit 80 rises due to the movement of the waves, the floating body 2 of the wave power generation device 1 also rises along with the rising sea surface S1. At this time, although the eccentric rotation shaft portion 23 of the floating body 2 also tries to rise, the weight of the unit base portion 81 and the like, which is a weight member of the wave power generation unit 80, is applied to this eccentric rotation shaft portion 23. Therefore, the rise of the eccentric rotation shaft portion 23 is suppressed by the weight of the unit base portion 81 and the like. As a result, the rising speed of this eccentric rotation shaft portion 23 becomes slower than or does not rise compared to the rising speed of other parts of the floating body 2. And since the eccentric rotation shaft portion 23 passes through a position eccentric in the horizontal direction with respect to the center of buoyancy of the floating body 2 (the center of the buoyancy acting on the floating body 2), due to the difference in the rising speed described above, a rotation in the direction in which the weighted portion W (power generation portion 4) side (center of buoyancy side) moves upward occurs around the axis of the eccentric rotation shaft portion 23 in the floating body 2.

[0044] On the other hand, as shown in Fig. 6(c), when the sea surface of the floating body 2 of any one of the wave power generation devices 1 connected to the unit base portion 81 of the wave power generation unit 80 descends due to the movement of the waves, the floating body 2 of the wave power generation device 1 also descends along with the descending sea surface S2. At this time, although the eccentric rotation shaft portion 23 of the floating body 2 also tries to descend, the buoyancy of the floating body 2 of another wave power generation device 1 connected by the unit base portion 81 of the wave power generation unit 80 acts on this eccentric rotation shaft portion 23. Therefore, the descent of the eccentric rotation shaft portion 23 is suppressed by the buoyancy of the floating body 2 of another wave power generation device 1 connected by the unit base portion 81. As a result, the descent speed of this eccentric rotation shaft portion 23 becomes slower than or does not descend compared to the descent speed of other parts of the floating body 2. And since the eccentric rotation shaft portion 23 passes through a position eccentric in the horizontal direction with respect to the center of buoyancy of the floating body 2 (the center of the buoyancy acting on the floating body 2), due to the difference in the descent speed described above, a rotation in the direction in which the weighted portion W (power generation portion 4) side (center of buoyancy side) moves downward occurs around the axis of the eccentric rotation shaft portion 23 in the floating body 2.

[0045] As described above, when the height of the sea surface of the floating body portion 2 of any one of the wave power generation devices 1 provided in the wave power generation unit 80 changes due to the movement of waves, the height change (vertical movement) of the eccentric rotating shaft portion 23 is suppressed by the unit base portion 81 or the like, so that the floating body portion 2 can be caused to rotate about the axis of the eccentric rotating shaft portion 23. As a result, as the floating body portion 2 rotates, the rotating portion 3 rotates about the axis of the eccentric rotating shaft portion 23, and the power generation portion 4 generates power by the rotational force. According to the present embodiment, the height change (vertical movement) of the floating body portion 2 due to the movement of waves is efficiently converted into a rotational movement about the axis of the eccentric rotating shaft portion 23 by suppressing the vertical movement (height change) of the eccentric rotating shaft portion 23 by the unit base portion 81 or the like, which is a suppressing portion, and the power generation in the power generation portion 4 due to the rotation of the rotating portion 3 can be promoted. Therefore, the vertical movement of the floating body portion due to the movement of waves can be efficiently converted into electric power, and a highly efficient wave power generation device 1 can be obtained.

[0046] FIG. 7 is a side view schematically showing the main body portion of the wave power generation unit 80 in the present embodiment. FIG. 8 is a plan view schematically showing the main body portion of the wave power generation unit 80 in the present embodiment. FIG. 9 is a cross-sectional view of the main body portion of the wave power generation unit 80 in the present embodiment.

[0047] As shown in FIG. 8, the unit base portion 81 of the wave power generation unit 80 in the present embodiment is composed of two side base portions 81a, 111a and a connecting base portion 81b that connects the longitudinal middle portions of the two side base portions 81a, 111a. A plurality (here, six) of wave power generation devices 1 are arranged between the two side base portions 81a, 111a, and the eccentric rotating shaft portions 23 extending from both end faces of the cylinder of each wave power generation device 1 are supported by the two side base portions 81a, 111a.

[0048] The wave power generation unit 80 of the present embodiment floats on the sea surface S, which is a fluid surface, by the buoyancy of a plurality of wave power generation devices 1 (the buoyancy of the floating body portion 2) supported by the unit base portion 81. In the example of FIG. 7, for example, the lower portion of the unit base portion 81 is located below the sea surface S, but the buoyancy is such that the upper portion of the unit base portion 81 is located above the sea surface S, which is obtained by the buoyancy of the plurality of wave power generation devices 1.

[0049] In the wave power generation unit 80 of the present embodiment, two underwater wings (froude foils) 112, 112 are provided as fluid resistance portions that are arranged in the sea below the floating body portion 2 of the wave power generation device 1 and generate fluid resistance against height changes in the upward and downward directions. The underwater wing 82 has a wing portion 82a that connects the tips of two legs extending from the unit base portion 81, and functions as a suppression portion together with the unit base portion 81 and the like.

[0050] Specifically, when the floating body portion 2 of any one of the wave power generation devices 1 attempts to rise due to the movement of the wave (sea level rise), an upward force also acts on the eccentric rotation shaft portion 23 of the wave power generation device 1, and an upward force also acts on the unit base portion 81 that supports the eccentric rotation shaft portion 23. At this time, the upper surface of the wing portion 82a of the underwater wing 82 connected to the unit base portion 81 becomes a fluid resistance surface and receives the resistance of seawater, so that the rise of the unit base portion 81 is prevented, and as a result, the rise of the eccentric rotation shaft portion 23 is suppressed.

[0051] Similarly, when the floating body portion 2 of any one of the wave power generation devices 1 attempts to descend due to the movement of the wave (sea level fall), a downward force also acts on the eccentric rotation shaft portion 23 of the wave power generation device 1, and a downward force also acts on the unit base portion 81 that supports the eccentric rotation shaft portion 23. At this time, the lower surface of the wing portion 82a of the underwater wing 82 connected to the unit base portion 81 becomes a fluid resistance surface and receives the resistance of seawater, so that the descent of the unit base portion 81 is prevented, and as a result, the descent of the eccentric rotation shaft portion 23 is suppressed.

[0052] Particularly, on the sea surface where the floating body part 2 that imparts buoyancy to the unit base part 81 is floating, the influence of wave movement is significant (the displacement amount in the vertical direction is large), whereas in the sea, the influence of wave movement is small (the displacement amount in the vertical direction is small). Due to this difference, the resistance received by the upper and lower surfaces of the wing part 82a becomes large, and a high restraining force against the vertical movement (height change) of the eccentric rotating shaft part 23 is exerted.

[0053] As the fluid resistance part, in addition to the underwater wing 82, for example, a sea anchor 83 as shown in FIG. 10 can also be used. When an upward force acts on the unit base part 81 that supports the eccentric rotating shaft part 23, the sea anchor 83 suppresses the upward movement (lifting) of the unit base part 81. However, when a downward force acts on the unit base part 81 that supports the eccentric rotating shaft part 23, the sea anchor 83 has substantially no function of suppressing the downward movement of the unit base part 81.

[0054] In the wave power generation unit 80 of the present embodiment, devices, members, etc. other than the plurality of wave power generation devices 1 may be provided. In the present embodiment, as an example, as shown in FIG. 11, a solar panel 84 as solar power generation means is provided in the wave power generation unit 80. This solar panel 84 is attached to the upper surface of the unit base part 81 of the wave power generation unit 80 and receives sunlight to generate electricity. The electricity generated by the solar panel 84 may be output from the wave power generation unit 80 together with, for example, the electricity generated by the wave power generation device 1, or may be output or used separately from the electricity generated by the wave power generation device 1.

[0055] In the wave power generation unit 80 of the present embodiment, not limited to the solar power generation means, devices, members, etc. according to the purpose may be appropriately mounted. For example, various sensors such as geomagnetic (azimuth) sensors, acceleration sensors, gyro sensors, and GPS may be mounted, or a wireless communication device may be mounted. Since the wave power generation unit 80 of the present embodiment is arranged floating on the ocean surface without being moored to the seabed (for floating on the ocean surface), when grasping the movement, orientation, etc. of the wave power generation unit 80 from a remote location, it is preferable to mount the above-mentioned various sensors and a wireless communication device for wirelessly communicating the sensor detection results to the outside. Also, by mounting a sensor for detecting the state (such as operation abnormality) of the wave power generation unit 80 and transmitting the sensor detection results (such as operation abnormality detection results) to the outside by wireless communication of the wireless communication device, the state of each wave power generation unit 80 can be grasped and managed from a remote location.

[0056] Further, for example, in the wave power generation unit 80 of the present embodiment, a light emitting part (for example, a strip-shaped LED) that emits light during power generation of the power generation part 4 may be arranged on the outer peripheral surface of the cylindrical case 21 of the floating body part 2 or the like. By arranging such a light emitting part, the power generation status of the power generation part 4 can be easily visually confirmed from the outside. Also, such a light emitting part can be configured to emit a specific wavelength, and can also be used, for example, for the purpose of suppressing the attachment of barnacles in the sea to the wave power generation unit 80 (for example, the solar panel 84, the floating body part 2, etc.).

[0057] FIG. 12 is an example of an electrical circuit diagram of the wave power generation unit 80 provided with a light emitting part 52 composed of an LED. In this example, the output terminal of the generator 48 is connected to the light emitting part 52 via a step-down transformer (step-down DC-DC converter) 53. With this circuit configuration, the LED emits light at the light emitting part 52 while power is being output from the output terminal of the generator 48 of the power generation part 4.

[0058] In addition, as an aspect of mounting devices, members, etc. according to the purpose on the wave power generation unit 80 of the present embodiment, for example, as shown in FIG. 13, a submerged structure such as a fish reef 85 may be provided by hanging it from the unit base portion 81 into the sea. In this way, the wave power generation unit 80 and a submerged structure unrelated to power generation may be combined and utilized. Further, such a submerged structure can also function as a fluid resistance portion in the same manner as the above-described underwater wing 82 and sea anchor 83.

[0059] Further, for example, as shown in FIG. 14, one or more wave power generation units 80 of the present embodiment may be arranged on a ship such as a hydrofoil ship 86 (for example, on the side, rear, or bottom of the ship). By arranging the wave power generation unit 80 on the ship in this way, it is possible to move the wave power generation unit 80 to the target location and immediately start power generation, or to generate power with the wave power generation unit 80 during the movement of the ship. The example of FIG. 14 is an example in which the wave power generation unit 80 is arranged on the bottom of a hydrofoil ship 86 in which a hydrofoil (hydrofoil) 86a changes the resistance received from the water into lift and rises from the sea surface to travel on the sea surface. In this example, during the movement to the target location, the wave power generation unit 80 is in a state of being lifted from the sea surface, so the movement of the ship (hydrofoil ship 86) is not hindered by the wave power generation unit 80.

[0060] In addition, as described above, the wave power generation unit 80 of the present embodiment has a configuration in which the cylindrical floating body portion 2 in each wave power generation device 1 rotates around the axis of the eccentric rotation shaft portion 23 to generate power. Therefore, as shown in FIG. 7, for example, when a wave S' travels from a direction orthogonal to the axial direction of the eccentric rotation shaft portion 23 (the longitudinal direction of the side base portion 81a of the unit base portion 81), the floating body portion 2 of each wave power generation device 1 easily rotates (oscillates) around the axis of the eccentric rotation shaft portion 23, and the vertical movement of the floating body portion 2 due to the wave S' is efficiently converted into a rotational movement around the axis of the eccentric rotation shaft portion 23, and high power generation efficiency can be obtained.

[0061] On the other hand, for example, when the wave S' travels from a direction parallel to the axial direction of the eccentric rotating shaft portion 23 (the short side direction of the side base portion 81a of the unit base portion 81), it is difficult for the floating body portion 2 of each wave power generation device 1 to rotate (oscillate) around the axis of the eccentric rotating shaft portion 23, and the vertical movement of the floating body portion 2 caused by the wave S' is difficult to be converted into a rotational movement around the axis of the eccentric rotating shaft portion 23, so high power generation efficiency cannot be obtained.

[0062] Therefore, it can be said that the wave power generation unit 80 of the present embodiment has a configuration with high directivity with respect to the traveling direction of the wave S'. Therefore, it is preferable that the wave power generation unit 80 of the present embodiment is maintained such that the axial direction of the eccentric rotating shaft portion 23 is orthogonal to the traveling direction of the wave S', that is, the longitudinal direction of the side base portion 81a of the unit base portion 81 is parallel to the traveling direction of the wave S'.

[0063] In the present embodiment, as shown in FIGS. 7 and 9, the unit base portion 81 of each wave power generation unit 80 is configured such that the lower portions of the two side base portions 81a and 111a that are substantially parallel to each other are located in the sea. Thereby, since the two side base portions 81a and 111a automatically turn so that the resistance when receiving the wave S' becomes the smallest, the longitudinal direction of the two side base portions 81a and 111a is corrected to a direction parallel to the traveling direction of the wave S'. As a result, the wave power generation unit 80 of the present embodiment is maintained such that the axial direction of the eccentric rotating shaft portion 23 is orthogonal to the traveling direction of the wave S'.

[0064] In the present embodiment, a configuration is adopted in which the axial direction of the eccentric rotating shaft portion 23 is corrected to be orthogonal to the traveling direction of the wave S' due to the structure of the unit base portion 81, but other correction configurations may be adopted. For example, a drive unit for changing the orientation of the unit base portion 81 may be provided, and the orientation of the unit base portion 81 may be changed by the driving force of the drive unit so that the axial direction of the eccentric rotating shaft portion 23 is corrected to be orthogonal to the traveling direction of the wave S'.

[0065] Also, by arranging the plurality of wave power generation units 80 so that their directions are different from each other, the directivity with respect to the traveling direction of the wave S' may be relaxed in the whole plurality of wave power generation units 80. For example, as shown in Fig. 15(a), if the directions of the wave power generation unit 80A and the wave power generation unit 80B are arranged so as to be shifted from each other by 90°, for the wave S' traveling in the vertical direction in the figure, high-efficiency power generation can be performed by the wave power generation unit 80A, and for the wave S' traveling in the left-right direction in the figure, high-efficiency power generation can be performed by the wave power generation unit 80B. Similarly, as shown in Fig. 15(b), if the directions of the wave power generation units 80A to 110C are arranged so as to be shifted from each other by 60°, high-efficiency power generation can be performed by the corresponding wave power generation unit for the wave S' traveling from more directions.

[0066] Also, by arranging the plurality of wave power generation devices 1 provided in one wave power generation unit 80 so that their directions are different from each other, a wave power generation unit 80 with relaxed directivity with respect to the traveling direction of the wave S' can also be obtained. For example, as shown in Fig. 16, the three wave power generation devices 1 may be supported and connected by the unit base portion 81 so that the axial directions of the respective eccentric rotating shaft portions 23 in the three wave power generation devices 1 are shifted from each other by 120°.

[0067] Also, as shown in Fig. 9, the unit base portion 81 of the wave power generation unit 80 of the present embodiment has a bottom shape that tapers downward. Thereby, when the floating body portion 2 of any one of the wave power generation devices 1 attempts to rise due to the movement of the wave (sea level rise), even if the unit base portion 81 receives a force pushed up from the sea surface by the sea level rise, since the bottom of the unit base portion 81 has a tapered shape, that force can be released. As a result, the unit base portion 81 is suppressed from being pushed up by the rising sea surface, and the effect of suppressing the rise of the eccentric rotating shaft portion 23 of the wave power generation device 1 by the unit base portion 81 can be enhanced.

[0068] In addition, as shown in FIG. 17, it is preferable that each tip portion 81c at both longitudinal ends of the two side base portions 81a and 111a of the unit base portion 81 of the wave power generation unit 80 of the present embodiment has a tapered shape. By adopting such a shape, when waves travel from the longitudinal direction of the side base portions 81a and 111a, the tip portions 81c of the side base portions 81a and 111a are likely to penetrate into the front surface in the wave traveling direction, and the floating (rising) of the unit base portion 81 due to the sea surface rising caused by the waves is suppressed. Thereby, the effect of suppressing the rising of the eccentric rotating shaft portion 23 of the wave power generation device 1 by the unit base portion 81 can be enhanced.

[0069] Next, a wave power generation system 10 including a plurality of wave power generation units 80 of the present embodiment will be described. FIG. 18 is an explanatory diagram showing the whole of the wave power generation system 10 in the present embodiment. FIG. 19 is a plan view schematically showing a part of the wave power generation system in the present embodiment.

[0070] The wave power generation system 10 of the present embodiment is arranged on the ocean in a state where a plurality of wave power generation units 80 are connected to each other by a coupler 91. As an example, the wave power generation system 10 of the present embodiment is a large-scale ocean power generation system in which the required number of wave power generation units 80 are arranged side by side vertically and horizontally over the entire ocean area A of 10 km × 10 km.

[0071] In the example of FIG. 19, a floating body frame 93 is arranged so as to surround the ocean area A where the wave power generation units 80 are arranged, and the ends of the rows of wave power generation units 80 connected to each other by the coupler 91 are connected to the floating body frame 93 by the coupler 91. By arranging such a floating body frame 93, it is possible to suppress obstacles floating on the ocean from colliding with the wave power generation units 80.

[0072] The electric power generated by each wave power generation device 1 of each wave power generation unit 80 of the wave power generation system 10 in the present embodiment is stored, for example, in a power storage unit arranged in a marine structure floating on the sea or fixed to the seabed. As an example, the wave power generation system 10 of the present embodiment includes one or more power output units 92 that output the electric power generated by each wave power generation device 1 of each wave power generation unit 80, and the power storage unit 90a (battery) on the electric carrier ship 90 as a marine structure is connected to this power output unit 92. According to this, it is possible to transport the power storage unit 90a that stores the electric power generated by the present wave power generation system 10 as it is to another location (such as on land) by the electric carrier ship 90.

[0073] Of course, the electric power generated by the wave power generation system 10 in the present embodiment may be transmitted to another location via a transmission line such as a submarine power cable. However, by adopting a configuration in which the generated electric power is stored in the power storage unit 90a and transported to another location by the electric carrier ship 90 as in the present embodiment, advantages such as eliminating the need for substation facilities (power conditioners) and the laying cost of transmission lines can be obtained. If there is another marine structure equipped with existing power transmission facilities (such as an offshore wind power generation system), the power output unit 92 of the present wave power generation system 10 may be connected to the other marine structure, and the electric power generated by the present wave power generation system 10 may be transmitted using the power transmission facilities of the other marine structure. There is no particular limitation on the method of transporting (transmitting) the electric power generated by the present wave power generation system 10 to another location, and any method can be adopted.

[0074] Also, the electric power generated by the wave power generation system 10 in the present embodiment may be used, for example, for generating next-generation energy such as hydrogen, and may be made into the state of next-generation energy and transported to another location. For example, a hydrogen generation unit (such as an electrolysis layer) that electrolyzes water (seawater) to generate hydrogen using the electric power generated by the present wave power generation system 10 may be connected to the power output unit 92 of the present wave power generation system 10. The hydrogen generated by this hydrogen generation unit may be transported to another location by, for example, a hydrogen carrier ship.

[0075] In addition, the electric power generated by the wave power generation system 10 in the present embodiment may be consumed by other offshore facilities (for example, offshore wind power generation facilities, oil platforms, aquaculture facilities, etc.) without being stored, for example. For example, the power output unit 92 of the present wave power generation system 10 may be connected to the offshore facility, and the electric power generated by the present wave power generation system 10 may be used as the electric power required for operating the power consumption device in the offshore facility.

[0076] In the present embodiment, an example in which the power generation rotating shaft portion of the rotating portion 3 is coaxial with the eccentric rotating shaft portion 23 has been described. However, the power generation rotating shaft portion of the rotating portion 3 may have a configuration that is not coaxial with the eccentric rotating shaft portion 23. In this case, for example, the rotating portion 3 may not be integrally formed with the floating body portion 2, and may be configured by a pendulum that rotates around the axis of the power generation rotating shaft portion inside the floating body portion 2.

[0077] The wave power generation system according to the present invention is not particularly limited to the number and arrangement method of the wave power generation units constituting the wave power generation system, and can be freely selected according to the purpose. Similarly, the wave power generation unit according to the present invention is not particularly limited to the number and arrangement method of the wave power generation devices provided in the wave power generation unit, and can be freely selected according to the purpose.

[0078] Next, the uses and the like of the wave power generation device will be described. First, an indirect wave power generation device that performs wave power generation without the physical waves directly contacting the wave power generation mechanism will be described. Specifically, the structure, control system, and uses of an indirect wave power generation device in which the wave power generation device generates power without physically contacting the waves due to directly or indirectly oscillating by the waves will be described.

[0079] All wave power generation devices to be described hereinafter may be floated on water to directly receive the physical energy of waves occurring on the water and perform wave power generation. Also, all wave power generation devices to be described hereinafter may be arranged not directly on the water but on floating bodies such as ships, boats, buoys, and floats, and the floating body directly receives the physical energy of waves and sways, and the wave power generation device arranged on the floating body indirectly receives the physical energy of waves and performs power generation. When indirectly performing wave power generation by arranging a wave power generation device on a floating body, it is desirable to arrange one or a plurality of wave power generation devices on the floating body. Also, when indirectly performing wave power generation by arranging a wave power generation device on a floating body, a secondary battery, which is a power storage means for storing and discharging the electrical energy obtained by wave power generation, may be provided inside the housing of the wave power generation device or outside the housing of the wave power generation device. When a plurality of wave power generation devices are mounted on a floating body, it is desirable to enable the electrical energy generated by any number of wave power generation devices to be stored in a common secondary battery. In that case, the power generation means of each wave power generation device and the common secondary battery are electrically detachably connected by a conductive cable.

[0080] Note that a single wave power generation device or a wave power generation device assembly composed of a plurality of wave power generation devices may perform power generation while drifting on the water, while self-propelling, or while being moored on the water. The wave power generation device may be moored to natural objects such as rocky reefs, rocks, islands, and trees, or may be detachably moored to artificial objects such as bridges, bridges, lighthouses, solar power generation means, wind power generation means, and artificial mooring means (a structure extending from a fixed member fixedly installed on the bottom of the water to the water surface, or a floating body connected by a rope or the like to a weight dropped to the bottom of the water). Also, a wave power generation device assembly composed of a plurality of wave power generation devices is detachably moored between natural objects, between natural objects and artificial objects, and between artificial objects.

[0081] As shown in FIG. 20, the shape of the housing (outer shell) of the wave power generation device has shapes such as oval, substantially spherical, vertically elliptical, horizontally elliptical, rectangular, a combined shape of a rectangle and a curved surface, etc. It may have a shape partially or entirely surrounded by a curved surface. It is desirable that the top and bottom portions of the housing of the wave power generation device have a curved surface.

[0082] Also, as shown in FIG. 20, it is desirable to have a secondary battery, which is a power storage means capable of storing and discharging electricity, inside the housing of the wave power generation device. The placement position of the secondary battery is preferably arranged at the bottom of the housing of the wave power generation device, at the upper part (near the top), or on a movable member such as a pendulum. This is because the mass of the secondary battery can be utilized for the rocking motion of the wave power generation device and power generation.

[0083] The material of the housing (outer shell) of the wave power generation device can be made of materials such as metal (stainless steel, aluminum, aluminum alloy), FRP, polyvinyl chloride (rigid polyvinyl chloride), resin, etc. FRP (fiber reinforced plastic) is a composite material obtained by reinforcing resin with fibers, and there are glass fiber reinforced plastic (GFRP) using glass fibers, CFRP using carbon fibers, etc. It is desirable that the housing (outer shell) of the wave power generation device has flame retardancy. Also, having thermoplasticity can improve production efficiency. Specifically, it is desirable to configure the housing (outer shell) of the wave power generation device with a resin having both flame retardancy and thermoplasticity, for example, transparent rigid polyvinyl chloride. Also, the housing (outer shell) of the wave power generation device can be composed of a plurality of materials. For example, the bottom side of the wave power generation device can be composed of a metal such as opaque stainless steel, and the side with the top can be constructed with transparent rigid polyvinyl chloride. Also, the bottom side of the wave power generation device can be composed of FRP (fiber reinforced plastic), and the side with the top can be constructed with transparent polyvinyl chloride. In the case of such a hybrid material configuration, the metal part enhances the electromagnetic wave reflection performance and is easily detected by radar, and inside the transparent part composed of polyvinyl chloride, etc., lighting means or light emitting means for presence indication can be provided, or solar power generation means can be arranged to coexist different functions in the same housing.

[0084] Note that the housing preferably forms a sealed space. When the housing is composed of different materials or a plurality of members, it is desirable to provide a waterproof structure at the joints between them by means of a waterproof seal, packing, etc. and join them.

[0085] The solar power generation means installed in the wave power generation device may be a panel-type silicon solar cell or a dye-sensitized solar cell. It may also be a perovskite solar cell, which is a type of dye-sensitized solar cell and uses a perovskite material instead of a dye. Since the film-type perovskite solar cell has flexibility, it can be bent. The film-type perovskite solar cell can be attached to the outer wall of the wave power generation device, and the electric power generated by sunlight can be stored in a secondary battery installed inside the wave power generation device via a conductive cable. The conductive cable is arranged from the outside of the housing to the inside of the housing through an opening provided in the housing. In addition, a part of the housing of the wave power generation device can be composed of a transparent member such as polyvinyl chloride, and a silicon solar cell panel can be attached inside the transparent member, or a film-type perovskite solar cell can be attached. In these cases, the solar power generation means inside the housing of the wave power generation device and the secondary battery of the power storage means inside the housing of the wave power generation device can be connected by a conductive cable inside the housing of the wave power generation device. Also, in the case of a film-type perovskite solar cell, since it can be colored, it can be colored in warning colors such as yellow and red, or eye-catching colors such as white.

[0086] It is desirable to apply a mollusk adhesion prevention material to the outer shell of the wave power generation device to prevent the attachment of barnacles and mussels. This is because when the wave power generation device generates wave power, the attachment of barnacles and mussels becomes a resistance, reducing the power generation efficiency. Apply the mollusk adhesion prevention material not only to the submerged part of the wave power generation device housing but also to the part that emerges from the water surface. Specifically, apply the mollusk adhesion prevention material up to about half of the height of the wave power generation device in the height direction, or up to a greater height. The mollusk adhesion prevention material is a red poisonous paint containing "cuprous oxide" or "zinc oxide", or an additive such as sodium chlorite or mineral-based ceramic particles that kill the larvae of barnacles that initially attach, added to a protective paint or poisonous paint and applied to the wave power generation device housing. Therefore, a part of the wave power generation device housing is colored red. At least the bottom of the wave power generation device housing or the submerged part is painted red regardless of the material of the housing.

[0087] In addition, a predetermined service life is required for the housing (outer shell) of the wave power generation device. It is necessary to be composed of a material that can achieve a service life of at least one year or more, or a thickness of a predetermined material. If possible, it is desirable to construct it with a material having a service life of 10 years or more, 20 years or more, or a thickness of a predetermined material.

[0088] Next, an example of the waterproof structure of the wave power generation device will be described. The control system and various devices (power generation mechanism, solar power generation panel, operation means, various devices, control secondary battery, large-capacity secondary battery, display means, communication device, GPS terminal, various antennas, various lighting means, radar, fish finder, sonar, imaging camera, etc.) installed in the indirect wave power generation device (floating wave power generation device or underwater wave power generation device) handle electrical signals, current, and voltage. Therefore, each of the control systems including all the control units (1) to (14) below and the various devices provided in the wave power generation device is preferably arranged in a sealed space (sealed box) provided in the wave power generation device for waterproofing. In particular, it is desirable that the control system, the control secondary battery, the large-capacity secondary battery for power storage, etc. are arranged in a sealed space (sealed box) provided in the wave power generation device for waterproofing and have a means for absorbing immersion water.

[0089] The sealed space is provided with an opening / closing mechanism for the operator to replace, repair, and operate various devices and control units. The opening / closing mechanism is protected from seawater and fresh water by a waterproof structure using a waterproof packing and a waterproof sealing member. Furthermore, in order to prevent unauthorized persons from opening and entering the interior, it is desirable to provide the opening / closing mechanism with a locking means having the aforementioned waterproof structure. The locking means may be a numbered locking means that is unlocked when a plurality of numbers match, or a key-type locking means that is unlocked when a key having a specific shape is inserted.

[0090] In addition, when a plurality of wave power generation devices are arranged in proximity, or when a plurality of wave power generation devices are arranged connected by a connecting means such as a rope, it is desirable that the unlocking means of each wave power generation device be common. Specifically, in the case of numbered locking means, it is desirable that they can be unlocked with a common number. In the case of key-type locking means that is unlocked when a key having a specific shape is inserted, it is desirable for efficiency that the shape of the key for unlocking the locking means of each wave power generation device be common.

[0091] Moreover, an electric connection cable exists in order for the control system arranged in the sealed space (sealed box) within the wave power generation device to enable electrical connection with the aforementioned various devices arranged in the sealed space (sealed box) provided within the wave power generation device. Each sealed space (sealed box) is provided with an opening through which this electric connection cable passes. In order to prevent water from entering between this opening and the electric connection cable, a prevention structure using a waterproof packing and a waterproof sealing member is provided at the opening of the sealed space. And within the sealed space, in the event that seawater or fresh water should enter, in order to absorb them and prevent them from entering the control system, it is desirable that a water absorption means consisting of a predetermined amount of water-absorbing gel (for example, a polyacrylic acid-based polymer with high water absorbency) covered with a water-supplying member such as a cloth member be arranged.

[0092] In addition, the electrical connection cable used to enable electrical connection between each control unit in the wave power generation device and various devices provided in the wave power generation device, and between the wave power generation device and a device existing outside the wave power generation device is preferably a waterproof electrical connection cable with a waterproof function such as being covered with a waterproof member. Further, at the end of the waterproof electrical connection cable, a waterproof connector having a waterproof function is provided with a cover or the like having a waterproof function.

[0093] The connection between each control unit in the wave power generation device and the waterproof electrical connection cable is electrically connected to each other by waterproof connectors provided respectively, enabling connection and disconnection. Also, the connection between various devices provided in the wave power generation device and the waterproof electrical connection cable is electrically connected to each other by waterproof connectors provided respectively, enabling connection and disconnection. As a result, the electrical connection between each control unit in the wave power generation device and various devices provided in the wave power generation device can be performed with the waterproof function in a state of connection and disconnection.

[0094] When the wave power generation device is exposed to sunlight on the water for a long time in summer, the internal air pressure of the sealed wave power generation device may increase due to the expansion of air. To avoid rupture, it is desirable to provide a waterproof exhaust valve shown in Fig. 21 on the wave power generation device housing or the floating body power storage device housing described in the wave power generation device assembly system of Fig. 39. As shown in Fig. 22, this waterproof exhaust valve can be provided near the top of the wave power generation device housing or the floating body power storage device housing described later. It can also be provided at a position at least half the height of the housing. It can also be provided at a position less than half the height of the housing. When the power extraction type wave power generation device generates electricity on the water, it can also be provided at a submerged position.

[0095] Some wave power generation devices are internal power storage type wave power generation devices that have one or more power storage means with a predetermined capacity for storing the power generated by the power generation means inside the housing. Also, in order to store the power generated by the power generation means inside the wave power generation device housing in the power storage means provided outside the wave power generation device housing or use it outside the wave power generation device housing, there is also a power extraction type wave power generation device that extracts the power generated by the power generation means inside the wave power generation device housing outside the wave power generation device housing. The power extraction type power generation device also has a secondary battery as a power storage means inside. This is to supply power to the control system inside the power extraction type power generation device. The power extraction type power generation device can extract the surplus power stored in the internal power storage means to the outside. Also, the floating body power storage device described later is provided with power storage means having a predetermined power storage capacity inside the housing. In this floating body power storage device and the power extraction type wave power generation device, it is necessary to provide power extraction means for extracting the power generated by the power generation means inside the housing outside the housing.

[0096] Figure 23A shows the structure of a waterproof cable connector, which is an example of the power extraction means of a floating body power storage device or a power extraction type wave power generation device, and the continuous connection of the power extraction type wave power generation device. The housing of the power extraction type wave power generation device A is provided with a waterproof cable connector for detachably connecting the power generation means inside the housing, the power storage means installed outside the housing, etc. A first convex terminal is provided on the outside of this waterproof cable connector. A waterproof connection cable for transmitting power to the external power storage means is detachably connected to this first convex terminal. And at the end of this waterproof cable, a waterproof connector having a concave terminal is provided. The shapes of both terminals can be reversed. For example, a concave terminal may be provided on the waterproof cable connector, and a convex terminal may be provided at the end of the waterproof connection cable.

[0097] Also, inside the waterproof cable connector terminal, there is a waterproof electric cable that is electrically connected to the power generation means inside the housing. The connection between the waterproof electric cable connected to the power generation means and the waterproof cable connector may be made by detachable connector means. Inside the waterproof cable connector, a silicon diode, which is a reverse current prevention means for preventing the reverse flow of electric power, is built in. This reverse current prevention means can also be provided in the electrical path between the waterproof cable connector and the power generation means, rather than inside the waterproof cable connector.

[0098] The reverse current prevention means shortens the charging path between the power generation means and the external power storage means and can reduce the impedance of the charging path, so it is used in a wave power generation device assembly system as shown in FIGS. 37 and 38. However, this reverse current prevention means may not be necessary in some cases. For example, when using a power extraction type wave power generation device and a floating body power storage device in pairs as in the embodiment shown in FIG. 29C2, a waterproof cable connector (FIG. 23D) without the reverse current prevention means can be used instead of the waterproof cable connector in FIG. 23A. In that case, since the waterproof cable connector functions as a power input / output means, the power stored in the buoyancy power storage means can be used by both an external device connected to the power extraction type power generation device and the control system inside the power extraction type wave power generation device. Also, the power storage means or the control system inside the power extraction type wave power generation device can be eliminated.

[0099] In FIG. 23A, only the non-grounded side of the waterproof electric cable is shown, but actually, the grounded side waterproof electric cable also needs to be connected. Therefore, two more convex terminals for connecting the grounded side waterproof cable are provided on the waterproof cable connector. Using these, the grounded side waterproof cable electrically connects between the power extraction type wave power generation device A and the power extraction type wave power generation device B. Also, another grounded side waterproof cable electrically connects between the power extraction type wave power generation device A and the external power storage means.

[0100] In addition, the waterproof cable connector has a second male terminal for connecting the waterproof cable connector of another power extraction type wave power generator B. Between this second male terminal and the aforementioned first male terminal, they are electrically connected upstream of the aforementioned backflow prevention means (on the N-channel side of the PN junction of the backflow prevention means). The waterproof connection cable for connecting between the waterproof cable connectors is provided with waterproof connectors having recessed terminals at both ends. When the power extraction type wave power generator B is in the final stage, a waterproof cap is attached to the second male terminal of the waterproof cable connector of the power extraction type wave power generator B.

[0101] Note that the installation position of the waterproof cable connector can be provided near the top of the wave power generator housing. Also, it can be provided at a position more than half the height of the housing. It can also be provided at a position less than half the height of the housing. It is also possible to provide it at the submerged position when generating power on the water.

[0102] The waterproof cable connector is a power extraction means for extracting the power generated by the power generation means inside the wave power generator housing to the outside of the wave power generator housing. An example of other power extraction means is a conductor that extracts the power generated by the power generation means inside the wave power generator housing to the outside of the wave power generator housing. This conductor as the power extraction means can extract the power generated by the power generation means to the outside of the wave power generator housing from the opening provided in the housing of the wave power generator. The conductor as the power extraction means may be a conductive cable. It is desirable that the conductive cable is a waterproof conductive cable having waterproof properties. Also, it is desirable that waterproof means such as a waterproof seal or waterproof packing is provided at the opening.

[0103] The waterproof cable connector has a function as a power extraction means. In addition to the power extraction function, it can also be used as an electrical signal input / output means for exchanging electrical signals and data between devices inside the wave power generator housing and devices outside the wave power generator housing. Fig. 23B shows the waterproof cable connector as the input / output means. Any number of male terminals are provided on the outer side and the inner side of the housing of the waterproof cable connector. The male terminals on the outer side and the inner side are electrically connected by conductive means. The waterproof conductive cable connected to the male terminal outside the housing is connected to a device outside the wave power generator housing, such as an antenna. On the other hand, the waterproof conductive cable connected to the male terminal inside the housing is connected to a device inside the wave power generator housing, such as the (13) external option control unit option connector of the control system. As a result, the antenna, which is a device outside the wave power generator housing, is electrically connected to the (3) communication control unit via the (13) external option control unit option connector of the control system, which is a device outside the wave power generator housing. When there are excess male terminals on the outer side of the housing of the waterproof cable connector, a male terminal waterproof protection cap is attached to protect the male terminals. In this way, the waterproof cable connector as a signal transmission means can electrically connect any number of devices outside the housing and devices inside the housing. The waterproof cable connector having an input / output function can be used in an internal power storage type wave power generator, a power extraction type wave power generator, a floating body power storage device, etc. Also, both the waterproof cable connector as a power extraction means and the waterproof cable connector as a signal transmission means can be provided. Also, as shown in Fig. 23C, it is possible to use a waterproof cable connector in which a power extraction means and a signal input / output means coexist in a single waterproof cable connector. Furthermore, as shown in Fig. 23D in which the reverse current prevention means is removed from the power extraction means of the waterproof cable connector in Fig. 23C, it is also possible to use a waterproof cable connector in which a power input / output means and a signal input / output means are provided side by side.

[0104] Since a power extraction type wave power generator and a floating body energy storage device oscillate due to waves, a waterproof conductive cable sways, and a waterproof cable connector receives a large force. As a result, there is a risk that the connection between the waterproof conductive cable and the waterproof cable connector may become disconnected. Therefore, one or more cable fixing means are provided outside the housing of an internal energy storage type wave power generator, a power extraction type wave power generator, and a floating body energy storage device. Further, one or more cable fixing means may be provided inside the housing of a power extraction type wave power generator or a floating body energy storage device to stabilize the waterproof conductive cable inside the housing. FIG. 24 shows an installation state of a waterproof cable connector attached to the housing of a power extraction type wave power generator or a floating body energy storage device, a waterproof conductive cable, and a cable fixture which is cable fixing means. The cable fixing means may be made of resin or may be made of an elastic body having elasticity. The waterproof cable fixing means is fixed to the wave power generator housing with bolts and nuts, fixing screws, or an adhesive. This fixing means may have a two-piece structure, and the two pieces may be fixed with bolts and nuts, fixing screws, or an adhesive with a waterproof cable sandwiched between the two pieces.

[0105] FIG. 25 is a diagram for explaining the installation positions of the waterproof cable connector and the cable fixing means. As shown in FIG. 25, a pair of the waterproof cable connector and the cable fixing means can be provided near the top of the wave power generator housing (or the floating body energy storage device housing). Further, it can also be provided at a position at least half the height of the housing. It can also be provided at a position less than half the height of the housing. When the power extraction type wave power generator generates power on the water (or when the floating body energy storage device housing floats on the water), it can also be provided at a submerged position. At each position, for a pair of the waterproof cable connector and the cable fixing means, the position of the waterproof cable connector may be higher than, lower than, or at the same height as the position of the cable fixing means. When the position of the waterproof cable connector is higher than the position of the cable fixing means, there is an advantage that water flowing along the cable does not flow to the waterproof cable connector side.

[0106] Next, an example of the control system of the wave power generation device will be described. FIG. 26 is a diagram for explaining the control system of the wave power generation device. The control system is composed of a plurality of control units to be described hereinafter.

[0107] (1) Overall control unit (1) The overall control unit has a ROM which is a non-volatile storage means for storing and reading out programs, a CPU which is an arithmetic means for executing programs, and a RAM which is a volatile storage means for writing and reading data. The CPU of (1) the overall control unit may incorporate a processor having an 8-bit, 16-bit, or 32-bit floating-point arithmetic unit suitable for learning processing. When a processor having a 32-bit floating-point arithmetic unit is incorporated into the control system of the wave power generation device, advanced artificial intelligence functions such as natural language voice conversation and generated sentences in natural language can be realized at high speed. On the other hand, when a processor having an 8-bit or 16-bit floating-point arithmetic unit is incorporated into the control system of the wave power generation device, learning processing and artificial intelligence functions can be provided with low power consumption, so it is more suitable as the artificial intelligence built into the wave power generation device.

[0108] (1) Even when the overall control unit does not have an artificial intelligence function, an 8-bit, 16-bit, or 32-bit processor is incorporated into the CPU of (1) the overall control unit. When a 32-bit processor is incorporated into the overall control unit of the wave power generation device, a program made in 32 bits can be executed and calculated at high speed. On the other hand, when an 8-bit or 16-bit processor is incorporated into the overall control unit of the wave power generation device, the program can be executed and calculated with low power consumption and low heat generation, so it is more suitable as the processor built into the wave power generation device.

[0109] It also incorporates an operating system, which is system software that controls the operation of the computer system, and firmware in which software for controlling the computer system is pre-written in an integrated circuit such as a ROM and incorporated into the device.

[0110] The power supply for operating the entire control system is supplied from a secondary battery that can be repeatedly charged and discharged. As the secondary battery for control that supplies power to the entire control system, nickel-cadmium storage batteries, nickel-metal hydride batteries, lithium-ion batteries, lead storage batteries, and NAS batteries can be used. Among them, a lithium-ion battery is desirable because of its fast charging speed and compact size. Lithium-ion batteries for automobiles can be diverted for use in wave power generation devices. Generally, when a lithium-ion battery for an EV (electric vehicle) deteriorates due to use and its charging capacity drops to about 80%, it is replaced with a new lithium-ion battery. The used lithium-ion battery (the one whose charging capacity has dropped to a predetermined amount) generated at that time can be used in the wave power generation device or the floating body energy storage device described later. The lithium-ion battery of Tesla Model 3 weighs 439 kg, has a power of 75 kW, and a cruising range of 310 miles. Therefore, a spherical floating body wave power generation device with a diameter of about 4 m can be equipped with less than one unit, or more than one unit (for example, 0.8 units, 1.5 units, 2 units, 2.2 units, 3 units, etc.) of new or used lithium-ion batteries. Also, in this overall control system, as shown in the figure, each control unit such as a communication control unit and an operation control unit is interconnected by a control unit lock and a bus line, and data, instructions, and response signals are transmitted bidirectionally.

[0111] Note that the secondary battery incorporated in the floating wave power generation device is preferably provided at a position below the waterline of the floating wave power generation device. At least a part of the secondary battery incorporated in the floating wave power generation device is preferably provided at a position below the waterline of the floating wave power generation device. By dissipating heat from the rising temperature of the incorporated secondary battery to seawater or fresh water existing outside the outer shell of the floating wave power generation device, it becomes possible to suppress the temperature rise. This arrangement is particularly effective when the secondary battery is a lithium-ion battery.

[0112] (2) Artificial intelligence unit (2) The artificial intelligence unit can also be stored as a program in a storage device such as a ROM or RAM within the (1) overall control unit. Further, it may be constructed within the overall control system in the wave power generation device as a (2) artificial intelligence unit having an artificial intelligence CPU, ROM, and RAM separately from the (1) overall control unit. When the (2) artificial intelligence unit is provided in the wave power generation device, it is desirable to also provide in the wave power generation device one or more learned models that make judgments based on machine learning data related to specific functions, multiple machine learning data related to different functions, and learned data. In this case, the wave power generation device can autonomously move to a specific location, perform danger avoidance actions according to the situation, and generate electricity with optimal efficiency according to environmental data such as wave height and period.

[0113] On the other hand, the (2) artificial intelligence unit is provided outside the wave power generation device, that is, in an onshore management facility, an onboard management facility, or on the cloud. The (2) artificial intelligence unit communicates with the aforementioned (1) overall control unit provided in the wave power generation device and the individual control units described later provided in the wave power generation device via the (3) communication control unit described later. The (2) artificial intelligence located at a position away from the wave power generation device can also remotely control the wave power generation device. In this case, the power consumption burden consumed by the artificial intelligence, the accumulation of a large amount of machine learning data to enhance the function of the artificial intelligence, and the storage of multiple learned models with different functions can be performed at a remote location outside the wave power generation device.

[0114] (2) The artificial intelligence unit may have a natural language generation function, a natural language interpretation function, an image recognition function for recognizing images captured by a camera or images sent from the outside, and a natural language conversation function by voice generation and voice recognition. In such a case, from a monitoring center on land or on a ship, for the (2) artificial intelligence unit of the wave power generation device on the water, questions can be asked about the operating status of the wave power generation device, the charging status of the secondary battery, the power generation status of the wave power generation device, etc. in the form of voice information or language information, or operation instructions can be given to various devices connected to the control system of the wave power generation device.

[0115] (2) The artificial intelligence CPU of the artificial intelligence unit incorporates a processor with an 8-bit, 16-bit, or 32-bit floating-point arithmetic unit suitable for learning processing. When a processor with a 32-bit floating-point arithmetic unit is incorporated into the control system of the wave power generation device, advanced artificial intelligence functions such as natural language voice conversation and conversation using generated language sentences in natural language can be realized at high speed. On the other hand, when a processor with an 8-bit or 16-bit floating-point arithmetic unit is incorporated into the control system of the wave power generation device, learning processing and artificial intelligence functions can be provided with low power consumption, so it is more suitable as the artificial intelligence CPU built into the wave power generation device.

[0116] (2) The artificial intelligence unit enables autonomous control of a plurality of different functions such as the overall autonomous operation of the wave power generation device, autonomous navigation, autonomous danger avoidance behavior, autonomous periodic information transmission and reception, and autonomous power generation efficiency control. In order to realize the autonomous control of these functions, the (2) artificial intelligence unit has a learned model for each function that makes an optimal judgment based on the machine-learned data for each function, the machine-learned data in the past, and the current situation data.

[0117] First, the case where the self-power generation efficiency control is performed by the (2) artificial intelligence unit will be described. The power generation efficiency or power generation output of the wave power generation device is affected by the size of the wave that shakes the wave power generation device, the wave period, the vibration period of the pendulum which is a part of the power generation means in the wave power generation device, the height of the center of gravity of the wave power generation device, the installation angle of the power generation mechanism, and the like. Therefore, past data on waves in various situations (any one of the wave size, wave period, wave propagation direction, wave propagation speed, date data, time data, or any arbitrary combination thereof), and past data on the variable state within the wave power generation device (any one of the vibration period of the pendulum which is a part of the power generation means, the height of the center of gravity of the wave power generation device, the installation angle of the power generation mechanism, or any arbitrary combination thereof) are associated with the output data (either the power generation efficiency or the power generation output, or both) of the past wave power generation device in that situation, and the power generation efficiency improvement machine learning data is repeatedly learned. The wave size and wave period are detected by a vibration sensor connected to the option connector of the (13) external option control unit described later. Also, the wave propagation direction and propagation speed are detected by a tidal current sensor connected to the option connector of the (13) external option control unit. The date data, or month and day data, and time data are obtained from a radio clock built into the (10) time management unit or a battery-driven quartz clock. Since the wave is greatly affected by the ebb and flow of the tide such as high tide and low tide, the date data, month and day data, time data, and the output data of the wave power generation device at that date and time alone can be the power generation efficiency improvement machine learning data. Also, including the date data, month and day data, time data, etc., learning the past data on waves in the power generation efficiency improvement machine learning data is effective in improving the judgment accuracy of the artificial intelligence.

[0118] The power generation efficiency improvement model determines and outputs the power generation efficiency, which is the output of the wave power generation device, or state variables within the wave power generation device (such as the oscillation period of the pendulum, the height of the center of gravity of the wave power generation device, the installation angle of the power generation mechanism, any one of them, or any combination of multiple ones) that increase the power generation output, based on the actual situation data regarding the waves at a certain point in time (any one of the wave height, wave period, wave propagation direction, or any combination of multiple ones) and the actual situation data regarding the state variables within the wave power generation device, and the machine learning data of the power generation efficiency improvement that has been machine-learned. (2) Based on the output of the power generation efficiency improvement model, the artificial intelligence unit drives and controls one or more drive means built into the wave power generation device, such as the oscillation period adjustment mechanism (the weight height change actuator of the pendulum), the center of gravity adjustment mechanism (the charger mechanism height change actuator), the power generation mechanism rotation actuator, etc., to autonomously change the internal state of the wave power generation device and control the power generation efficiency and power generation output of the wave power generation device to be optimal.

[0119] Figures 27AA to 27AF and Figures 27B to 27C show examples of the wave power generation device state variable means for changing the state within the wave power generation device. Figures 27AA to 27AF show the vibration suppression mechanism and the power generation mechanism rotation mechanisms (14a, 14b, 15). However, the rotation actuator for rotating the power generation mechanism is not shown. Figure 27B shows the center of gravity position adjustment mechanism. Figure 27C shows the oscillation period adjustment mechanism.

[0120] In the explanations so far, as one of the situation data, data regarding the waves (any one of the wave height, wave period, wave propagation direction, or any combination of multiple ones) has been described. However, considering that the output of the wave power generation device changes under the influence of the waves, data on the output of the wave power generation device (either the power generation efficiency, the power generation output, or both) and date and time data can be used as substitute variables for the data regarding the waves.

[0121] That is, the output data (either one or both of power generation efficiency and power generation output) of the wave power generation device in various situations, and both or one of the date and time data, and the data related to the state variable in the wave power generation device (the vibration period of the pendulum which is a part of the power generation means, the height of the center of gravity of the wave power generation device, the installation angle of the power generation mechanism, any one or any combination of them) are associated with the output data (either power generation efficiency or power generation output or both) of the wave power generation device in that situation, and are repeatedly learned for the machine learning data for improving power generation efficiency. Further, in order to improve the accuracy, in addition to the output data of the wave power generation device in various situations, adding the date and time data in that situation for machine learning of the machine learning data for improving power generation efficiency is also effective.

[0122] The power generation efficiency improvement model determines and outputs the state variable (any one of the vibration period of the pendulum, the height of the center of gravity of the wave power generation device, the installation angle of the power generation part, or any combination of any number, etc.) in the wave power generation device that increases the power generation efficiency or power generation output, which is the output of the wave power generation device, based on the output data (either one or both of power generation efficiency and power generation output) of the wave power generation device in a certain situation, and the situation data related to the state variable in the wave power generation device (any one of the vibration period of the pendulum which is a part of the power generation means, the height of the center of gravity of the wave power generation device, the installation angle of the power generation mechanism, or any combination of them) and the machine learned machine learning data for improving power generation efficiency. (2) Based on the output of the power generation efficiency improvement model, the artificial intelligence unit drives and controls one or any number of drive means built in the wave power generation device, such as the vibration period adjustment mechanism (the weight height change actuator of the pendulum), the center of gravity adjustment mechanism (the charger height change actuator), the power generation part rotation actuator provided in the power generation part rotation mechanism (installed around 15 and 14b), etc., to autonomously change the internal state of the wave power generation device and control the power generation efficiency and power generation output of the wave power generation device to be optimal.

[0123] In the autonomous danger avoidance behavior of the wave power generation device, for example, when the approach of a ship is detected by the radar of the (3) communication control unit provided in the floating wave power generation device, or when the approach of a typhoon is detected by obtaining various weather information and wave height information from the (12) environmental observation control unit, collision avoidance behavior with the ship, start of typhoon avoidance behavior, notification to the outside of the dangerous state via the (3) communication control unit, locking of the motor for rotating the charging mechanism, and braking lock for suppressing the movement of the charging mechanism by the vibration suppression mechanism, lowering the height of the power generation mechanism to lower the center of gravity of the wave power generation device and locking it, etc. The safety assurance actions are performed by the danger avoidance behavior function that has performed machine learning on the action function with actual situation data, data of the same type as the actual situation data, and a huge amount of data, and a learned model that makes a judgment on the danger avoidance behavior function based on the actual situation data and the machine learning data. The control of the danger avoidance behavior is autonomously performed.

[0124] Also, when moving means such as a screw drive motor are provided as an option, the (3) communication control unit detects the current position information via GPS and autonomously performs optimal movement behavior control to move to the movement destination location instructed from the outside. As the consideration information at that time, data such as wind force, wind direction, tidal current direction, tidal current speed, weather information, wave height information, etc. are obtained from the outside via the (3) communication control unit, or obtained from sensors provided inside the wave power generation device. The movement behavior control is autonomously performed by a movement behavior learned model that makes a judgment on the optimal movement speed and the optimal direction based on the actual situation data, movement behavior machine learning data obtained by performing machine learning on the action function with data of the same type as the actual situation data and a huge amount of data, and data related to these movement behaviors.

[0125] And the autonomous danger avoidance behavior is carried out, for example, when the radar of the (3) communication control unit detects the approach of a ship or an aircraft. When the approach of a ship or an aircraft is detected, based on the position information of the wave power generation device obtained from the GPS, the connection status of the floating body wave power generation device (whether the wave power generation device is single, how many wave power generation devices are connected in what state, the number and connection positions of the floating body wave power generation devices with autonomous navigation functions), the approaching speed and direction of the approaching aircraft or ship, the speed and direction of the tidal current and wind, etc., which are the actual situation data, and the danger prediction machine learning data created by performing machine learning with a huge amount of data of the same type as the actual situation data, the danger prediction model judges the possibility of collision, and when it is judged to be dangerous, it autonomously performs danger avoidance behavior. It emits a warning sound and a warning message from the speaker to the approaching ship, or turns on and blinks the warning lights of red or yellow to warn the approaching ship or aircraft. Also, information (approach information including the image of the approaching object) about the current dangerous situation is transmitted via the (3) communication control unit to the manned management base provided on land or the management center provided on the manned ship, and a request is made to the manned management base on land and the management center of the manned ship to issue a warning notice and request danger avoidance behavior to the approaching ship or aircraft manually.

[0126] In addition, the (2) artificial intelligence unit receives digital data and electrical signals of the actual situation from the (11) management and control unit, various sensors provided in the wave power generation device, and various devices provided inside and outside the wave power generation device for various devices in the wave power generation device. By doing so, for various devices connected to the control system in the wave power generation device, based on the failure remote diagnosis data of various devices and the failure prediction machine learning data consisting of a huge amount of data at the time of past failures regarding the same type of actual situation data, that is, data from various sensors, digital data from various devices, and electrical signals, a failure prediction can be made using a pre-trained failure prediction model for predicting future failures. For various devices and secondary batteries connected to the control system in the wave power generation device, when a failure occurrence is predicted, a warning lamp for warning of the failure is lit for the device or secondary battery for which the failure occurrence has been predicted, or the failure occurrence prediction information is notified to the management center of the wave power generation device on the ground or on the ship via the communication control unit described later.

[0127] (3) The communication control unit is connected to various antennas (all or part of satellite communication antennas, mobile phone base station antennas, 5G communication antennas, 4G communication antennas, short-range communication antennas, Wi-Fi communication antennas, GPS antennas, radar antennas, etc.) provided in the floating wave power generation device. When the outer shell of each antenna is made of a material having radio wave permeability such as polyvinyl chloride, it is desirable to install it at a high position inside the outer shell of the wave power generation device from the viewpoints of waterproofing and wind protection. However, when the outer shell is made of a material that does not allow radio waves to pass through, such as stainless steel, it is installed outside the outer shell. In that case, the antenna unit and the inside of the wave power generation device are electrically connected by a signal cable provided through a waterproof structure to exchange electrical signals.

[0128] In addition, the communication control unit has encryption / decryption means for encrypting and transmitting communication information and decrypting the encryption of the received communication information, enhancing the security function of the communication information. In particular, for specific information, that is, control information for controlling a control system built into an offshore wave power generation device (including information for controlling lower-level control units included in the control system) from a ground or shipboard management center, information collected by a fish finder, sonar, underwater camera, or aerial camera, and encrypting and transmitting their image information externally provides an important effect in preventing the leakage of business information and military information.

[0129] (3) A 5G mobile communication terminal device, a 4G mobile communication terminal device, a Wi-Fi communication device, and a satellite communication unit are connected to the communication control unit. (3) The satellite communication unit installed in the communication control unit conducts communication via satellites in outer space. Satellites in the geostationary orbit 36,000 km above the equator cover the whole of Japan and its territorial waters. Data transmission and reception are carried out between the antenna (earth station) installed in the wave power generation device and the satellite. Some of the radio waves for satellite communication are called Ku band and C band. The satellite communication band of the wave power generation device can be either Ku band or C band. Ku band (frequency band 10.6 - 15.7 GHz: using the frequency band 12.25 - 12.75 GHz for downlink and 14.0 - 14.5 GHz for uplink) has the characteristic that small antenna reception is possible, so it is suitable for satellite communication with the wave power generation device as the base station. The satellite communication unit of the wave power generation device can transmit and receive voice, images, and digital data with satellite communication base stations around the world via multiple communication satellites in outer space. For example, if connected to Starlink, a satellite internet constellation operated by SpaceX in the United States, satellite internet access becomes possible in almost the entire world. The main counterpart communication base stations of the satellite communication unit of the floating wave power generation device that enables satellite internet access in almost the entire world are communication base stations installed in onshore wave power generation device management facilities that manage one or more wave power generation devices, communication base stations installed on ships, fishing boats, and military ships on the ocean around the world, and any base stations installed on floating power generation device management ships on the ocean that manage one or more wave power generation devices.

[0130] The satellite communication unit of the wave power generation device can conduct two-way transmission and reception of voice, images, and digital data with any one or more communication base stations around the world almost in real time. Specifically, from the wave power generation device, meteorological information such as temperature, weather, and wind direction detected by sensors built into the wave power generation device, ocean information such as wave height, tidal current speed, tidal current direction, and seawater temperature, position information of ships and aircraft detected by the radar installed in the wave power generation device, and radar images output by the radar can be continuously transmitted as information almost in real time.

[0131] When a fish finder or sonar is provided in a floating body wave power generation device or an underwater buoyancy power generation device, the floating body wave power generation device or the underwater power generation device can transmit information on the presence or absence of detected fish schools, submarines, and ships to onshore base stations and shipboard base stations around the world almost in real time.

[0132] When a fish finder is provided in the wave power generation device, it can obtain detection images of fish schools directly below the wave power generation device and the seabed and transmit the information to an arbitrary base station. When a sonar is provided in the wave power generation device, it can detect 360 degrees around the ship itself and can freely detect fish schools existing in the lateral and diagonal directions. It can continuously obtain detection images of fish schools, submarines, and the seabed in the lateral and diagonal directions, as well as time information and position information, either constantly or for an arbitrary period of time, and transmit the information to the communication device of an arbitrary satellite communication base station almost in real time. In addition, the detection information of fish schools and submarines can be recorded in storage means such as the RAM of the overall control unit in (1) with date and time information, position information, water depth information, and fish quantity information, or learned or analyzed by the artificial intelligence in (2), to predict the encounter with fish schools and submarines and transmit the results to the communication devices of one or more arbitrary satellite communication base stations around the world via the satellite communication function.

[0133] Furthermore, a wave power generation device equipped with a fish finder or sonar can obtain almost real-time detection information of fish schools or submarines from one or more other wave power generation devices equipped with fish finders or sonars via a communication path, and perform evaluation and analysis in combination with the detection information of fish schools or submarines by its own fish finder or sonar, and can also predict the moving destinations of fish schools or submarines. Then, the predicted moving destinations of the fish schools can be transmitted to the communication devices of one or more fishing boats such as skipjack fishing boats and tuna fishing boats or onshore communication base stations almost in real time.

[0134] On one hand, for example, skipjack fishing boats or tuna fishing boats can obtain one or more fish school detection information or predicted fish school encounter information continuously at all times or for a predetermined period by communication from one or more floating wave power generation devices provided with a fish finder or sonar. As a result, fishing boats such as skipjack fishing boats and tuna fishing boats can move at an approach angle suitable for the fishing method in the sea area where fish schools have been detected, or approach at an approach angle suitable for the fishing method in the sea area where an encounter is predicted based on the predicted fish school encounter information, thereby efficiently and dramatically increasing the catch.

[0135] (3) The communication control unit can be electrically connected to an antenna for a base station of any mobile phone carrier provided inside the outer shell of the wave power generation device or outside the outer shell, and a base station device of any mobile phone carrier provided inside the outer shell of the wave power generation device or outside the outer shell. It is desirable to set up multiple antennas for any mobile phone carrier to improve directivity. As much as possible, it is desirable to install the antenna at a high position near the top of the floating wave power generation device. Also, the antenna and the base station device may be those of a single mobile phone carrier, or those of multiple mobile phone carriers may be installed side by side. The base station device for mobile phone carriers provided in the floating wave power generation device is located at the edge of the radio access network, collects voice and data signals from mobile phones, and sends them to the core network of the mobile phone carrier.

[0136] In this way, the floating wave power generation device having an antenna and a base station device for a mobile phone base station can be used as a base station for any number of mobile phone carriers. A floating wave power generation device with a single mobile phone base station function can enable mobile phone communication in an area with a radius of 1 km to several km. Also, by arranging multiple floating wave power generation devices with mobile phone base station functions at a predetermined distance (a distance at which they can communicate with each other), mobile phone communication in a wider area can be enabled. In these cases, if multiple antennas and base station devices for mobile phone carriers are provided in each floating wave power generation device with a mobile phone base station function, mobile phone communication operated by multiple mobile phone carriers in a wider area can be enabled.

[0137] The floating body wave power generation device can be installed with a wireless LAN router (Wi-Fi router) connected to a satellite communication device connectable to the Internet or a mobile phone communication device connectable to the Internet. Wi-Fi is short for "Wireless Fidelity", which is a short-range communication technology for connecting a device to an Internet line. It features wireless Internet connection and can be used with Wi-Fi-compatible devices and peripheral devices such as personal computers, smartphones (mobile phones), tablets, game consoles, and printers within the range where radio waves can reach.

[0138] (3) The communication control unit electrically interconnects a satellite communication device connectable to the Internet, a mobile phone communication device connectable to the Internet, and a wireless LAN router (Wi-Fi router) provided in the wave power generation device, enabling mutual communication between them. As a result, within an area of several tens of meters centered on the floating body wave power generation device, Internet connection via wireless connection is possible with Wi-Fi-compatible devices and peripheral devices such as personal computers, smartphones (mobile phones), tablets, game consoles, and printers. Furthermore, by arranging a plurality of floating body wave power generation devices with built-in wireless LAN routers (Wi-Fi routers) at a predetermined distance (a distance at which they can communicate with each other), it becomes possible to connect to the Internet wirelessly in a wider area.

[0139] GPS (Global Positioning System) is a satellite positioning system operated by the United States of America. Among the approximately 30 GPS satellites launched by the United States for military use, signals from several satellites in the sky are received by a GPS antenna and a GPS receiver, enabling the receiver to know its current position. By providing this GPS antenna and GPS receiver in a floating wave power generation device, the floating wave power generation device can accurately grasp its position on the earth in real time. Since this GPS receiver is connected to the communication control unit in (3) and electrically connected by the internal bus of the control system, each control unit constituting the control system can utilize the GPS signal. In particular, the overall control unit in (1), the artificial intelligence unit in (2), the environmental observation control unit in (12), the moving means control unit in (14), and the external option control unit in (13) can be interconnected with the GPS receiver, and each of their control units can utilize the GPS signal in real time.

[0140] A radar with an output of about 5 kW (the output may be 5 kW or less, or 5 kW or more) is provided in the floating wave power generation device, and the radar can be controlled by the communication control unit in (3). Since the communication control unit in (3) is electrically connected by the internal bus of the control system, each control unit constituting the control system can be connected to the radar. Specifically, the overall control unit in (1), the artificial intelligence unit in (2), the environmental observation control unit in (12), the moving means control unit in (14), and the external option control unit in (13) can utilize the radar, which plays an important role in enabling the floating wave power generation device to take danger avoidance actions.

[0141] As described above, the communication control unit (3) can transmit and receive data via a wave power generation device, any communication equipment in the world, a satellite communication network, or a 4G / 5G mobile communication network. As a result, remote control and remote diagnosis of the floating body wave power generation device can be performed from onshore bases around the world or offshore bases on ships in the ocean. It is possible to remotely update the firmware and operating system provided in the overall control unit (1) or the artificial intelligence control unit (2) within the wave power generation device. Not only software, but also ON / OFF control of hardware such as the light emitting means, fish finder, sonar, radar, etc. provided in the wave power generation device, and access to digital data and image data output by the fish finder, sonar, radar, etc. are possible from any location in the world.

[0142] Furthermore, the communication control unit (3) can remotely perform remote diagnosis of failures and prediction of the occurrence of failures via a wave power generation device, any communication equipment in the world, a satellite communication network, or a 4G / 5G mobile communication network. Specifically, for various devices within the wave power generation device, the management control unit (11), various sensors provided within the wave power generation device, various devices provided inside the wave power generation device (control systems, secondary batteries, motors, light emitting means, antennas, solar power generation means such as solar panels, etc.), and various devices provided outside (light emitting means, fish finders, sonars, radars, underwater robots, solar panels, etc.), by receiving digital data and electrical signals, remote diagnosis of failures of various devices and predictive diagnosis of failures that will occur in the future based on machine learning of data related to past failures can be performed remotely.

[0143] (4) The charge / discharge and power transmission control unit stores the electrical energy generated by the wave power generation device in a large-capacity secondary battery or a control secondary battery provided in the power generation device, or transmits the electrical energy generated by the wave power generation device to a floating body energy storage device outside the wave power generation device or a power transmission grid outside the wave power generation device via a power transmission cable connected to the wave power generation device for control. When the solar panel is connected to the (13) external option control unit, the (4) charge / discharge and power transmission control unit can also charge the control secondary battery or the large-capacity secondary battery built into the wave power generation device with the electrical energy converted from solar energy at a DC voltage. That is, the (4) charge / discharge and power transmission control unit also controls the electrical energy generated by the solar panel.

[0144] Furthermore, the (4) charge / discharge and power transmission control unit has an AC / DC converter that converts the alternating current generated by the wave power generation device into direct current, and stores electrical energy in the large-capacity secondary battery or the control secondary battery with direct current.

[0145] When transmitting the electrical energy generated by the wave power generation device to a floating body energy storage device outside the wave power generation device or a power transmission grid via a power transmission cable connected to the wave power generation device, it is transmitted in the state of alternating current.

[0146] The wave power generation device is provided with two types of secondary batteries: a large-capacity secondary battery and a control-use secondary battery. The large-capacity secondary battery is for storing a large amount of electrical energy generated by the wave power generation device through wave power. A secondary battery with a large capacity of about 15 kw to 200 kw is used. The large-capacity secondary battery is cartridge-type and is provided so as to be replaceable and removable. After being stored in a substantially full state, it can be taken out from the wave power generation device and stored on land or on a ship, or the electrical energy stored on land or on a ship can be taken out. For the control-use secondary battery, a secondary battery with the same or a smaller capacity than the large-capacity secondary battery is used. Since high-speed charge and discharge are required, a lithium-ion battery is desirable. The control-use secondary battery is used to supply electrical energy to the control system of the wave power generation device and various active means (motor, radar device, fish finder, sonar, camera, satellite communication device, mobile phone base station device, lighting device, underwater robot) connected to the control system. Thus, it is desirable that the wave power generation device be provided with a plurality of secondary batteries. Further, those plurality of secondary batteries have different sizes, different shapes, and different storage capacities.

[0147] (4)'s charge / discharge and power transmission control unit has a charging / discharging destination selection device. Since the wave power generation device cannot do anything without the control system functioning, the electrical energy generated by the wave power generation device is first charged into the control secondary battery by the charging / discharging destination selection device. After that, charging of the large-capacity secondary battery is started. Even when the capacity of the control secondary battery falls below a certain low level, the charging / discharging destination selection device preferentially charges the control secondary battery over charging the large-capacity secondary battery. That is, when the charge of the control secondary battery is at a predetermined level or higher, the charging / discharging destination selection device charges the large-capacity storage battery. Since the control secondary battery can also experience failures or deterioration, it is cartridge-type and is attached to the wave power generation device in a replaceable manner. The control secondary battery and the large-capacity secondary battery are constantly monitored for voltage, insulation state, temperature, and degree of deterioration by the (11) management control unit described later, and replacement is carried out based on the monitoring results. When an abnormality or failure is detected in the control secondary battery or the large-capacity secondary battery by the (11) management control unit, the use of the secondary battery in which the abnormality or failure has been detected is stopped. For example, when an abnormality or failure is detected in the control secondary battery, the power supply source to the control system of the wave power generation device is switched from the control secondary battery to the large-capacity secondary battery, and after the switch, the electrical connection to the control secondary battery is cut off, and the use of the control secondary battery is stopped. Also, when an abnormality or failure is detected in the large-capacity secondary battery, the accumulation of electrical energy in the large-capacity secondary battery is stopped as soon as possible.

[0148] Among wave power generation devices, there are also power extraction type wave power generation devices that do not have a large-capacity secondary battery and transmit the electrical energy generated by the wave power generation device to the onshore power transmission grid via a power transmission cable or to a large-capacity secondary battery provided outside the wave power generation device. Even in such a wave power generation device, the charge / discharge and power transmission control unit of (4) gives priority to charging the control secondary battery over external power transmission by the power transmission cable.

[0149] (5) The operation control unit is connected to a keyboard and various switches used by the operator to control the control system of the wave power generation device. The keyboard is a device for inputting character, symbol, and numerical information into (1) the overall control unit and (2) the artificial intelligence unit. A general keyboard has mechanically operated key tops, but there is a risk of water intrusion into the gaps between the key tops. It is desirable that the keyboard and various switches in the wave power generation device have a waterproof function. Therefore, a touch panel type keyboard is desirable for the keyboard. Also, for the various switches, there are a main switch for turning on and off the entire control system of the wave power generation device, an individual control unit switch for turning on and off each individual control unit constituting the control system, an individual switch for turning on and off the control secondary battery and the large-capacity secondary battery individually, an external option switch for turning on and off external options (solar panel, radar device, fish finder, sonar, camera, satellite communication device, mobile phone base station device, lighting device, underwater robot, weather observation sensor, etc.) connected to the (13) external option control unit, etc. The operator can operate these switches to individually reset or disconnect the malfunctioning control unit or external option device. It is desirable that these various switches have a waterproof structure with waterproof packing and waterproof seals.

[0150] (6) The generator mechanism rotation control unit rotationally controls the support body that supports the generator mechanism such as a pendulum by an actuator (such as a motor) driven by the power of the battery, rotates it in a direction perpendicular to the rotation axis of the pendulum in the direction of wave propagation, and improves the power generation efficiency. (6) The generator mechanism rotation control unit is connected to an actuator such as a motor by an electrical signal line to control the actuator such as a motor that rotationally drives the support body that supports the generator mechanism.

[0151] According to Embodiments 1 and 2, the support for the power generation mechanism such as a pendulum can also be automatically rotated in a direction orthogonal to the rotation axis of the pendulum in the direction of wave propagation by the inertia of the pendulum vibration. In such Embodiments 1 and 2, it is possible to omit the (6) power generation mechanism rotation control unit and the actuator for rotationally driving the support.

[0152] (6) The power generation mechanism rotation control unit is controlled by the aforementioned (1) overall control unit or (2) artificial intelligence control unit to optimize the power generation amount of the wave power generation device. Also, the (6) power generation mechanism rotation control unit can be controlled to optimize the power generation amount of the wave power generation device by remote control from outside the wave power generation device, that is, from an onshore management facility or an onboard management facility via the (2) communication control unit.

[0153] (7) The lighting control unit is connected to various lighting means installed inside and outside the wave power generation device and to a control secondary battery or a large-capacity secondary battery provided inside the wave power generation device. And it performs ON / OFF control of various lighting means, brightness control of the lighting device, control of changing the emission color, etc. Also, since the (7) lighting control unit can be connected to a satellite communication network, a mobile communication network, a Wi-Fi communication network, and a short-range communication network via the (3) communication control unit, remote control and remote diagnosis of various lighting devices provided in the wave power generation device can be performed from a manned management center, etc. provided on land or on an ocean-going ship. Therefore, various lighting devices provided in the wave power generation device can be illuminated with the electrical energy generated by the wave power generation device or remotely controlled and remotely diagnosed from a location away from the wave power generation device without performing power transmission by a power transmission line from land or ON / OFF control of various lighting means on water, brightness control of the lighting device, control of changing the emission color, etc.

[0154] (7) The various lighting devices controlled by the lighting control means include the following, namely, collision prevention lighting devices, ambient lighting devices, underwater fish aggregating lighting devices, in-water fish aggregating lighting devices, lighting devices for fish farming facilities, etc. Each lighting device may be installed alone on the wave power generation device, or a combination of multiple types of lighting devices may be installed on the wave power generation device. In addition, each lighting device may have one light emitting part, or may have a plurality of light emitting parts consisting of an arbitrary number.

[0155] · Collision prevention lighting device It is a lighting device for clearly indicating the presence and position of the wave power generation device to the other party in order to prevent the wave power generation device from colliding with other ships, boats, and airplanes. The light emitting color of the lighting device is effective in white, red, yellow, etc. In addition to a single color at all times, a method of sequentially switching colors or a method of flashing is also effective. The number of lighting devices may be one, or a plurality of arbitrary numbers may be provided. When a plurality are provided, they may be the same color or a combination of different colors. The installation location of the lighting device may be at a high position of the wave power generation device, or may be installed at an arbitrary height between the top and the water surface. Installing it near the top (the highest part) of the wave power generation device enables it to be visible even from a distance.

[0156] · Ambient lighting device Like street lights on land, it can brightly illuminate the surroundings of the wave power generation device. The light emitting color of the lighting device is effective in white, red, yellow, etc. In addition to a single color at all times, a method of sequentially switching colors or a method of flashing is also effective. The number of lighting devices may be one, or a plurality of arbitrary numbers may be provided. When a plurality are provided, they may be the same color or a combination of different colors. The installation location of the lighting device may be at a high position of the wave power generation device, or may be installed at an arbitrary height between the top and the water surface. Installing it near the top (the highest part) of the wave power generation device enables a wide area to be brightened. In order to brighten a wider area, rod-shaped or pedestal-shaped supports may be installed near the top of the wave power generation device, and the lighting devices may be installed at their high positions.

[0157] · Underwater fish aggregating lighting device When the water surface is illuminated brightly by a lighting device, plankton gathers, small fish that eat the plankton gather, and large fish and squids that prey on them gather. If a wave power generation device with an underwater fish aggregating lighting device is placed around a squid fishing boat, or in or around an oceanic squid jigging pit, many fish and squids will gather, which is convenient. The light emission color of the lighting device is effective in white, blue, green, red, etc. In addition to a single color at all times, a method of sequentially switching colors or a method of flashing is also effective. The number of lighting devices may be one, or a plurality of any number may be provided. When a plurality are provided, they may be of the same color or a combination of different colors. The installation location of the lighting device may be at a high position of the wave power generation device, or may be installed at any height between the top and the water surface. If it is provided near the top (the highest point) of the wave power generation device, it is possible to illuminate a wide range. In order to illuminate a wider range, a rod-shaped or pedestal-shaped support can be installed near the top of the wave power generation device, and the lighting device can be installed at a high position on them.

[0158] · Submerged fish aggregating lighting device When a submerged lighting device is arranged near the bottom surface of the wave power generation device or a waterproof cable is hung from the wave power generation device and the submerged lighting device is made to emit light at a water depth of several meters to more than 10 meters underwater, many fish can be gathered. The light emission color of the lighting device is effective in white, blue, green, red, etc. In addition to a single color at all times, a method of sequentially switching colors or a method of flashing is also effective. The number of lighting devices may be one, or a plurality of any number may be provided. When a plurality are provided, they may be of the same color or a combination of different colors.

[0159] The water depth at which the submerged lighting device is arranged can be changed to a desired water depth by replacing it with a waterproof cable having a desired length, or adjusting the length of a waterproof cable having a sufficient length with a submerged lighting provided at the tip of the waterproof cable so that the submerged lighting device is located at a predetermined depth (for example, winding the waterproof cable around something to adjust the length).

[0160] · Lighting device for fish farming facility The underwater lighting installed in the wave power generation device helps the growth of farmed fish by improving the feed requirement rate, reducing the amount of fish feed used, thus enabling cost reduction and water quality improvement. Also, by installing the lighting at a predetermined depth (e.g., a water depth of 5 meters) to attract fish to the desired water depth, it is possible to reduce the infection of harmful organisms existing near the sea surface and increase the feeding efficiency. Further, (7) the lighting control unit controls the brightness, lighting time, and length of the lighting time of the underwater light-emitting part of the lighting device for fish farming facilities to provide a predetermined light cycle, thereby shortening the day-night cycle for farmed fish and promoting the growth of farmed fish.

[0161] (8) The power generation control unit performs control to change the height of the center of gravity of the wave power generation device or change the natural vibration frequency of the wave power generation device in order to optimize the wave power generation amount of the wave power generation device. Also, suppression control for suppressing the vibration of the power generation mechanism is performed. Specifically, an actuator for moving a power generation unit such as a pendulum in the vertical direction is controlled to change the center of gravity position of the wave power generation device. For example, when the waves are calm, the power generation control unit controls the center of gravity moving actuator to move the center of gravity of the wave power generation device to a high position to make the wave power generation device more swayable, or when the waves are rough, move the center of gravity of the wave power generation device to a low position to prevent excessive sway of the wave power generation device.

[0162] Also, (2) the power generation control unit controls a natural vibration frequency changing means including a power generation weight in the wave power generation device, a spring provided between the power generation weight and a support body that supports the power generation weight, and an actuator for moving the position of the power generation weight on the support body to optimize the wave power generation amount of the wave power generation device.

[0163] Furthermore, (2) the power generation control unit controls an actuator for moving a power generation unit such as a power generation weight in the vertical direction to bring the power generation weight into contact with a vibration suppression mechanism to suppress the vibration of the power generation weight. This suppression of the vibration of the power generation weight is performed when the waves are too large, such as during a typhoon, or when the wave power generation device is moved without performing wave power generation.

[0164] (8) The power generation control unit is controlled by the aforementioned (1) overall control unit or (2) artificial intelligence control unit to optimize the power generation amount of the wave power generation device. Also, the (8) power generation control unit can be controlled to optimize the power generation amount of the wave power generation device by remote control from outside the wave power generation device, that is, from the wave power generation device control system of the onshore management facility or the onboard management facility, via the (2) communication control unit.

[0165] (9) The display control unit displays the states of various devices (power generation device, solar power generation panel, operating means, various devices, control secondary battery, large-capacity secondary battery, display means, communication device, GPS terminal, various antennas, various lighting means, radar, fish finder, sonar, imaging camera, etc.) provided in the wave power generation device on the internal state display LCD or LED. Also, the display control unit displays the states of each control unit of the control system provided in the wave power generation device on the internal state display LCD or LED. Also, it displays the failure status and the results of failure diagnosis of various devices and each control unit on the internal state display LCD or LED. Furthermore, the (9) display control unit obtains the power storage amount and charging state of the control secondary battery and the large-capacity secondary battery from the (4) charge and discharge control unit and displays them on the internal state display LCD or LED.

[0166] (9) The display control unit can send the display information on the internal state display LCD or LED, the power storage amount, and the charging state information of the control secondary battery and the large-capacity secondary battery to the onshore management facility or the onboard management facility outside the wave power generation device via the (3) communication control unit.

[0167] (10) The time management unit incorporates a radio clock, a battery-driven quartz clock, a programmable timer, a time measurement device, and a year / month / day memory device. Since the (10) time management unit is connected to the bus line of the control system, it is possible to communicate with all other control units connected to the bus line of the control system regarding information on year / month / day, time, and hour.

[0168] (11) The management and control unit performs management of the operating states and fault diagnosis of all control units connected to the control system, and various devices (power generation devices, solar power generation panels, operating means, various devices, control secondary batteries, large-capacity secondary batteries, display means, communication devices, GPS terminals, various antennas, various lighting means, radars, fish finders, sonars, imaging cameras, etc.) connected to each control unit.

[0169] (11) The management and control unit performs fault diagnosis of all control units connected to the control system and various devices respectively connected to each control unit through power-on sequence control started when the power of the control system is turned on or reset control at the time of reset. Thereafter, (11) the management and control unit monitors the operating states of all control units connected to the control system and various devices respectively connected to each control unit at a predetermined time period. (11) The management and control unit transmits the fault diagnosis results or operating states of all control units connected to the control system and various devices respectively connected to each control unit to (1) the overall control unit, (2) the artificial intelligence control unit, or the control system of the management center arranged on land or on the ship. Transmission to the control system of the management center outside the wave power generation device is performed via (3) the communication control unit.

[0170] (12) The environmental observation and control unit has connected thereto an internal temperature sensor, an atmospheric pressure sensor, a water temperature sensor, an illuminance sensor, a vibration sensor, a sound collection microphone, an internal flooding detection sensor, a control secondary battery temperature sensor, a large-capacity secondary battery temperature sensor, etc. of the wave power generation device. Each detection information detected from each sensor to which the (12) environmental observation and control unit is connected is shared by each control unit constituting the control system via the bus line of the control system.

[0171] For example, (1) the overall control unit and (2) the artificial intelligence control unit perform optimal wave power generation control and start fault diagnosis based on the detection information from the (12) environmental observation control unit. In addition, the wave power generation device control system of the management center located on land or on a ship can obtain each piece of detection information detected from each sensor connected to the (12) environmental observation control unit via the (3) communication control unit of the wave power generation device, a satellite communication network, or a mobile communication network.

[0172] If it is detected that the large-capacity secondary battery temperature sensor is in an abnormally high temperature state, the (1) overall control unit, (2) artificial intelligence control unit, or the wave power generation device control system of the management center located on land or on a ship stops charging the large-capacity secondary battery and cuts off the electrical connection between the control system and the large-capacity secondary battery. In addition, if it is detected that the control secondary battery temperature sensor is in an abnormally high temperature state, charging of the control secondary battery is stopped, the electrical connection between the control system and the control secondary battery is cut off, and the power supply to the control system is switched from the control secondary battery to the large-capacity secondary battery so that power is supplied to the control system from the large-capacity secondary battery.

[0173] (13) The external option control unit is provided with a predetermined number of external option connection connectors for connecting a predetermined number of external options. And, via a waterproof connector and an electrical connection cable having a waterproof function, the external option connection connectors are connected to various devices (solar power generation panels, various antennas, above-water lighting means, underwater lighting means, radar, fish finders, sonars, underwater cameras, above-water cameras, underwater robots, above-water drones, underwater temperature sensors, etc.) provided outside the wave power generation device main body. (13) The external option control unit and various devices connected to this (13) external option control unit can perform two-way communication with each other. (The (13) external option control unit can send control instruction information to the connected various devices to control the various devices. Also, from the side of the various devices, a reaction signal to the control instruction, and information detected and acquired by sensors and cameras on the side of the various devices, etc. can be sent to the (13) external option control unit. Signals and information obtained by the (13) external option control unit from the various devices are shared by each control unit constituting the control system via the bus line of the control system. Also, a reaction signal to the control instruction sent from the side of the various devices, and information detected and acquired by sensors and cameras on the side of the various devices, etc. can also be transmitted to the wave power generation device control system of the management center arranged on land or on a ship via the (13) external option control unit, (3) communication control unit, satellite communication network, and mobile communication network. Conversely, from the wave power generation device control system of the management center arranged on land or on a ship, control instruction information for the various devices can be sent via the satellite communication network, mobile communication network, (3) communication control unit of the wave power generation device, and (13) external option control unit to send control instruction information for the various devices and remotely control the various devices.

[0174] (14) The movement control unit controls the movement of the wave power generation device. More specifically, it controls the movement speed and movement direction of the wave power generation device to perform control to move to the target position.

[0175] When the wave power generation device has a screw driven by an electric motor as the moving means, the rotational speed of the electric motor, which is the power source within the wave power generation device, is controlled to regulate the moving speed of the wave power generation device.

[0176] When the wave power generation device has a water jet engine mechanism such as that used in a water bike as the moving means, water pumped up from underwater is forcefully discharged as a water flow from a rear jet port by an electric high-pressure pump, which is the power source, to obtain propulsion force. Also in this case, similar to when the wave power generation device has a screw driven by an electric motor as the moving means, the moving speed of the wave power generation device can be controlled by an electrical signal.

[0177] The moving direction of the wave power generation device can be controlled by driving a rudder provided at the bottom of the wave power generation device with a driving source such as an electric motor. Also, a pair of screws or water flow injection nozzles can be provided at a predetermined interval on the wave power generation device, and by providing a propulsion force difference between them, the moving direction of the wave power generation device can be controlled. For example, by rotating one of a pair of screws at a predetermined rotational speed and stopping the remaining screw, the traveling direction of the wave power generation device can be controlled.

[0178] The moving speed and moving direction of the wave power generation device are controlled by the (14) movement control unit. And this (14) movement control unit is controlled by a program within the (1) overall control unit in the control system, or is autonomously controlled by the (2) artificial intelligence control unit. Or, it is remotely controlled from a control system at an onshore or on-board management center located at a position away from the wave power generation device via the (3) communication control unit.

[0179] The target position information for the movement of the wave power generation device is either (1) stored in a program within the overall control unit or (2) autonomously generated by the artificial intelligence control unit. Alternatively, from a control system in an onshore or offshore management center located at a position away from the wave power generation device, (3) through the communication control unit, (1) the target position information can be set in the program within the overall control unit or (2) the artificial intelligence control unit can be instructed with the target position information for remote control. Furthermore, from a control system in an onshore or offshore management center located at a position away from the wave power generation device, (3) through the communication control unit, directly to the (14) movement control unit, the movement direction and movement speed can be instructed to remotely operate the movement to the target position. In that case, the control system in the onshore or offshore management center remotely controls the wave power generation device to move it to a predetermined target position while grasping the current position of the wave power generation device based on the GPS signal sent from the (3) communication control unit of the wave power generation device.

[0180] Next, another example of the wave power generation device will be described. A pendulum-type wave power generation device to which the present invention is applicable will be described with reference to FIGS. 27AA, 27AB, 27AC, 27AD, 27AE, and 27AF.

[0181] The wave power generation device 100 in the examples shown in FIGS. 27AA and 27AB includes a floating body 102, a first support 110, a rotating shaft 120, a second support 130, a power generation weight 133, a power generation mechanism 140, a vibration suppression mechanism 150, a control unit (not shown), a control battery, and a storage battery. The floating body 102 has a hollow interior and is floated on the water surface W.

[0182] The shape of this floating body 102 is approximately oval, and each component is accommodated therein. In this example, among the oval floating bodies 102, the pointed sharp end 103 faces upward and protrudes from the water surface W, and the round blunt end 104 faces downward and is in the water. Further, a lower weight 105 for maintaining the posture of the floating body 102 is appropriately provided inside the blunt end 104. The first support 110 is provided inside the floating body 102 such that its axis is in the vertical direction. In this example, it includes an upper column part 111 and a lower column part 112 each consisting of a single pillar, an intermediate column part 113 having a vertically long substantially square shape in a front view, and direction adjustment bearings 114a and 114b.

[0183] The ends of the upper column part 111 and the lower column part 112 are supported by the direction adjustment bearings 114a and 114b. For this reason, the first support 110 is rotatable about its longitudinal axis. And when the first support 110 rotates, the rotation axis always becomes perpendicular to the waves. Note that as the first support, instead of a columnar member as in this example, it is also possible to use, for example, the wall surface of the floating body 102 as the first support, or other frameworks or structures.

[0184] Among the above direction adjustment bearings 114b, the one provided on the upper side is installed directly on the inner surface of the floating body 102 or indirectly via a bracket or the like (not shown). Also, the one provided on the lower side is installed in a manner embedded in the lower weight 105. Note that when there are other components around the lower column part 112, for example, a turntable 115 (the dashed line parts in FIGS. 27AA and 27AB) installed in the lower weight 105 can be used as the lower direction adjustment bearing 114b, and other components can be placed on this turntable 115. Also, for the rotation of the first support 110, a control unit, a control battery, and an actuator (not shown) can be provided to perform some control. However, in this example, due to the inertia caused by the vibration of the second support 130, the direction perpendicular to the axis of the rotation axis 120 can be automatically directed in the wave propagation direction.

[0185] The rotating shaft 120 is provided horizontally on the first support 110 and includes a horizontal shaft 121 and a pendulum bearing 122. The horizontal shaft 121 is provided between the two intermediate column portions 113 and is installed such that both its left and right ends fit into the intermediate column portions 113. The pendulum bearing 122 is provided at the central portion of the horizontal shaft 121, rotates with respect to the horizontal shaft 121, and has the second support 130 attached thereto. Note that in this example, no load for power generation that directly extracts power from the shaft of the rotating shaft 120 is connected to the rotating shaft 120.

[0186] The second support 130 hangs down from the rotating shaft 120 and performs a pendulum motion. In this example, two parallel columns are hanging down. Also, a spring support portion 131 that supports the upper end of a spring 132 described later is provided between the two second supports 130.

[0187] The power generation weight 133 is supported by a spring 132 on a spring support portion 131 provided on the second support 130 and reciprocates along the second support 130 by the centrifugal force generated by the pendulum motion of the second support 130. This power generation weight 133 is slidably attached to the second support 130 by a linear bearing 135. Also, the lower end of the spring 132 is attached to a spring attachment plate 134 shown in FIG. 27AE provided at the center of the upper surface of the power generation weight 133. Further, the lower surface of the power generation weight 133 is arcuate in side view, and when the position of the power generation weight 133 is lowered or the like, the lower surface of the power generation weight 133 comes into contact with a braking wheel 151 described later with substantially the same strength.

[0188] The movement of this power generation weight 133 will be described with reference to FIGS. 27AC and 27AD(A) - (D). FIG. 27AC is a diagram for explaining a state in which when the floating body 102 vibrates due to waves, the second support 130 performs a pendulum motion due to the sway. At this time, since there is no particular load on the rotating shaft 120, the second support 130 can easily start vibrating.

[0189] Next, the reciprocating motion of the power generation weight 133 will be described with reference to FIGS. 27AD(A) to (D). Note that these figures are schematically shown for easier understanding of the explanation. FIG. 27AD(A) shows a state where the second support 130 is stationary. Assuming that the second support 130 moves from here toward the right side of the figure in response to the vibration of the floating body 102. When the second support 130 vibrates to the right from the position shown in FIG. 27AD(A), initially, the power generation weight 133 moves to the side opposite to the rotation axis 120 due to centrifugal force.

[0190] Next, as shown in FIG. 27AD(B), when the second support 130 reaches the end of its amplitude, the centrifugal force acting on the power generation weight 133 disappears, and the power generation weight 133 moves toward the rotation axis 120. Next, the second support 130 starts to move toward the left and reaches the state shown in FIG. 27AD(C). Then, centrifugal force acts on the power generation weight 133, and it moves to the side opposite to the rotation axis 120. Further, when the second support 130 moves and reaches the state shown in FIG. 27AD(D), the centrifugal force acting on the power generation weight 133 disappears, and the power generation weight 133 moves toward the rotation axis 120. By repeating these motions, the power generation weight 133 repeats a reciprocating motion along the second support 130.

[0191] The power generation mechanism 140 shown in FIG. 27AE generates electricity by the reciprocating motion of the power generation weight 133. The power generation mechanism 140 generates electricity by the reciprocating motion of the power generation weight 133. This power generation mechanism 140 will be described with reference to FIGS. 27AE to 27AF.

[0192] In this example, the power generation mechanism 140 is attached inside the power generation weight 133 and to the second support 130. Specifically, the power generation mechanism 140 includes two rack gears 141a and 141b, two pinion gears 142a and 142b arranged coaxially, a one-way clutch 143, a torque converter 144, a flywheel 145, a generator 146, and a plurality of output shafts 147a, 147b, and 147c that connect the components from the one-way clutch 143 (pinion gears 142a and 142b) to the generator 146. Among these, a part of the torque converter 144, flywheel 145, generator 146, and output shafts 147a, 147b, and 147c is housed in the generator box 148 (or attached to the generator substrate 148). Then, the generator box 148 is attached to the second support 130 via a bracket 149c. As a result, the two pinion gears 142a and 142b are indirectly attached to the second support 130.

[0193] Also, two rack gears 141a and 141b are provided facing each other so as to correspond to the two pinion gears 142a and 142b exposed from the generator box 148. These two rack gears 141a and 141b are attached to the power generation weight 133 via brackets 149a and 149b. The attachment directions of the rack gears 141a and 141b are such that the longitudinal directions of the rack gears 141a and 141b are along the direction of the second support 130, that is, along the reciprocating motion direction of the power generation weight 133. As a result, the rack gears 141a and 141b are indirectly fixed to the power generation weight 133 that reciprocates with respect to the second support 130. The one-way clutch 143 is built into the pinion gears 142a and 142b and rotates the output shaft 147a in the same direction regardless of the rotation directions of the two pinion gears 142a and 142b.

[0194] Due to the structure, when the power generation weight 133 reciprocates with respect to the second support 130, the two pinion gears 142a and 142b rotate in opposite directions by the rack gears 141a and 141b attached to the power generation weight 133. For example, when the rack gears 141a and 141b shown in FIG. 27AF move, the pinion gear 142a in contact with the right rack gear 141a rotates clockwise as viewed from the front, and the pinion gear 142b in contact with the left rack gear 141b rotates counterclockwise. At this time, if the one-way clutch 143 is arranged so that the output shaft 147a rotates only clockwise, the pinion gear 142a in contact with the right rack gear 141a rotates the output shaft 147a, and the pinion gear 142b in contact with the left rack gear 141b idles.

[0195] Conversely, when the rack gears 141a and 141b move in the opposite direction, the pinion gear 142a in contact with the right rack gear 141a rotates counterclockwise as viewed from the front, and the pinion gear 142b in contact with the left rack gear 141b rotates clockwise. Then, the pinion gear 142a in contact with the right rack gear 141a idles, and the pinion gear 142b in contact with the left rack gear 141b rotates the output shaft 147a. By the rotation of the output shafts 147a, 147b, and 147c, the torque converter 144, the flywheel 145, and the generator 146 connected to the subsequent stage are driven to generate electricity.

[0196] The generated electric power is stored in a storage battery through a cable (not shown). Incidentally, contrary to the above configuration, the rack gears 141a and 141b can be attached to the second support 130, and the generator box 148 or the generator substrate 148 can be attached to the power generation weight 133. Also, the torque converter 144 and the flywheel 145 are not essential components and can be omitted.

[0197] Returning to FIGS. 27AA and 27AB, the vibration suppression mechanism 150 will be described. The vibration suppression mechanism 150 abuts against the power generation weight 133 to limit the pendulum motion of the second support 130. This is achieved by lowering the position of the power generation weight 133 by the center of gravity adjustment mechanism 160 and the vibration suppression mechanism 150 described later and making it abut against the vibration suppression mechanism 150. In this example, the vibration suppression mechanism 150 includes a brake wheel 151, a brake shaft 152, a bracket 153, and an auxiliary generator 154. The brake wheel 151 rotates when the power generation weight 133 abuts against it.

[0198] The brake shaft 152 transmits the rotation of the brake wheel 151 and is pivotally supported by the bracket 153 to support the brake wheel 151. The bracket 153 is attached to the first support 110 and rotatably supports the brake shaft 152. The auxiliary generator 154 converts the rotation of the brake shaft 152 into electric power. Note that by providing the vibration suppression mechanism 150 on the right side of the first support 110 in FIGS. 27AB, the power generation amount by the auxiliary generator 154 can be doubled. Also, as the vibration suppression mechanism 150, instead of generating power as in this example, a resistive material such as a friction material may be driven by an actuator (none of which are shown) and pressed against the power generation weight 133.

[0199] Next, referring to FIG. 27B, a wave power generation method using the center of gravity adjustment mechanism 160 will be described. The center of gravity adjustment mechanism 160 is configured to adjust the height of the rotation shaft 120 relative to the first support 110 to change the center of gravity position of the entire wave power generation device 101. In this example, both left and right end portions of the rotation shaft 120 are inserted into the middle column portion 113 of the first support 110, and a ball screw mechanism is used in which the end portions are used as nuts 161 and are penetrated by a screw shaft 162 passing through the middle column portion 113. Note that in the moving range of the rotation shaft 120 in the vertical direction, slits (not shown) for the rotation shaft 120 to move are provided on the opposing surfaces of the middle column portion 113. The screw shaft 162 is driven by an actuator 163 provided on the side surface of the middle column portion 113. Note that the operation of this actuator 163 is performed by the control unit (not shown) and the control battery described above.

[0200] By moving this rotating shaft 120 up and down, the center of gravity position of the floating body 102 can be adjusted, the strength of the restoring force of the floating body 102 can be adjusted, and the vibration frequency per unit time of the floating body 102 can be controlled. For example, when the wave height is high and the wave period is short, by lowering the center of gravity position to strengthen the restoring force of the floating body 102 and increasing the vibration frequency of the floating body 102, the vibration frequency of the second support 130 can be increased. Conversely, when the wave height is low and the wave period is long, instead of raising the center of gravity position to weaken the restoring force of the floating body 102 and lowering the vibration frequency of the floating body 102, a state is created in which the floating body 102 is easily tilted even by weak waves, and the second support 130 can be actively vibrated. Next, with reference to FIG. 27C, a wave power generation method using the vibration period adjustment mechanism 170 will be described. The vibration period adjustment mechanism 170 adjusts the height of the spring 132 and the power generation weight 133 relative to the second support 130 to adjust the period of the pendulum motion of the second support 130.

[0201] In this example, both left and right ends of the spring support portion 131 are inserted into the second support 130, and the ends are used as nuts 171, and a ball screw mechanism that penetrates a screw shaft 172 passing through the second support 130 is used. In the moving range of the spring support portion 131, slits (not shown) for the rotating shaft 120 to move are provided on the opposing surfaces of the second support 130. The screw shaft 172 is driven by an actuator 173 provided on the side surface of the second support 130. The operation of this actuator 173 is also performed by a control unit (not shown) and a control battery in the same manner as the center of gravity adjustment mechanism 160. By moving the power generation weight 133 up and down, the vibration period of the second support 130 is adjusted to resonate with the vibration period of the floating body 102. That is, when the vibration frequency per unit time of the floating body 102 is high, the height of the spring 132 and the power generation weight 133 is increased to shorten the vibration period of the second support 130.

[0202] On the other hand, when the vibration frequency per unit time of the floating body 102 is low, the height of the spring 132 and the power generation weight 133 is lowered to lengthen the vibration period of the second support 130, etc. This makes it possible to vibrate the second support 130 more efficiently.

[0203] Furthermore, other modified embodiments of the wave power generation device will be described. (1) Wave power generation device with solar power generation means (inside the housing, outside the housing, inside and outside the housing) If solar power generation means (solar power generation panel) is added to the wave power generation device, power generation by sunlight becomes possible even in the absence of waves, and the power generation efficiency can be dramatically increased. Figures 28A and 28B show an embodiment in which solar power generation means is attached to the wave power generation device.

[0204] The solar power generation means may be a panel-type silicon solar cell as shown in Fig. 28B, or a dye-sensitized solar cell. It may also be a perovskite solar cell that uses a perovskite material, a type of dye-sensitized solar cell, instead of a dye. Since the film-type perovskite solar cell has flexibility, it can be bent. The housing (outer part) of the wave power generation device often has a shape surrounded by an oval, elliptical, substantially spherical, or the like aspect. Therefore, as shown in Fig. 28A, the film-type perovskite solar cell can be attached to the outer wall of the wave power generation device, and the electric power generated by sunlight can be stored in a secondary battery installed inside the wave power generation device. Also, a part of the housing of the wave power generation device can be composed of a transparent member such as polyvinyl chloride, and the film-type perovskite solar cell can be attached inside the transparent member, or a silicon solar cell panel can be attached inside the transparent housing. In these cases, the solar power generation means inside the housing of the wave power generation device and the secondary battery inside the housing of the wave power generation device can be connected by a conductive cable inside the housing of the wave power generation device. Also, in the case of a film-type perovskite solar cell, since it can be colored, it can be colored in warning colors such as yellow and red, or conspicuous colors such as white.

[0205] The housing of the wave power generation device has flame retardancy. If it is made of a transparent body such as polyvinyl chloride, which is a thermoplastic resin, a solar power generation panel can be installed inside the housing of the wave power generation device. Further, if flexible solar power generation means is used, the flexible solar power generation means can be arranged in contact with or in close contact with the curved surface of the housing. In this case, it is desirable to install the solar power generation means at a position above the waterline of the wave power generation device. For example, solar panels can be installed in the region from near the top to about 1 / 3 or 2 / 3 of the height of the housing. In this case, the opening for accessing the inside of the wave power generation device can be installed in a region where the solar power generation means is not installed. Also, a light / radio wave reflecting member for danger avoidance, which will be described later, can be installed in a region where the solar power generation means is not installed.

[0206] For example, a flexible film-like solar power generation means can also be installed in a belt-shaped region between about 1 / 4 of the height from the top of the housing and about 2 / 3 of the height from the top of the housing. In this case, near the top of the housing, a flat solar panel, an antenna for satellite communication, an antenna for GPS, an antenna for a mobile base station, a light-emitting means for danger avoidance, a light-emitting means for illumination, etc. can be arranged.

[0207] Further, one or any number of solar power generation means can be installed outside the housing of the wave power generation device (for example, near the top or on the side surface of the housing). In this case, the transparency of the wave power generation device is not necessarily required. The solar power generation means can be either flat or curved. When installing the solar power generation means outside the housing, it is necessary to connect a conductive cable for sending the electrical energy generated by the solar power generation means to the secondary battery charging device inside the housing from the solar power generation means via the opening of the wave power generation device housing to the secondary battery charging device inside the housing. The opening of this wave power generation device housing has a waterproof structure composed of a waterproof seal, a waterproof packing, etc. Also, the conductive cable used here is a conductive cable with a waterproof function having a waterproof layer, etc.

[0208] Although the cases of providing the photovoltaic panel inside the housing and outside the housing have been described, it can also be installed both inside and outside the housing as necessary.

[0209] The installation of the wave power generation device having photovoltaic power generation means can be moored to an artificial mooring means (a structure extending from a fixed member fixedly installed on the seabed to above the water surface, or a floating body tied with a rope or the like from a weight dropped on the seabed). The wave power generation device having the moored photovoltaic power generation means may be one or any number of plural ones. Further, when a plurality of wave power generation devices are moored to the mooring means, it is also possible to moor them in a mixed manner with a wave power generation device having photovoltaic power generation means and a wave power generation device not having photovoltaic power generation means. Further, it is possible to moor a combination of those having different structures, such as those having photovoltaic power generation means outside the housing and those having it inside the housing.

[0210] The installation of the wave power generation device having photovoltaic power generation means can also be simply allowed to drift without being moored to anything. In a relatively stable water area such as an inner bay or a lake, it can be simply allowed to drift. Further, if the position of the wave power generation device can be grasped by a GPS device, it can be recovered at any time.

[0211] The wave power generation device having photovoltaic power generation means can also be self-propelled when it has the self-propelling means described later. It can be always self-propelled, but it is desirable to arrange it within a predetermined area by combining drifting and self-propelling. In this case, it is desirable to allow it to drift for most of the time, and when it is likely to go outside the predetermined area as a result of drifting, to self-propel it to a predetermined position within the predetermined area.

[0212] The wave power generation device having photovoltaic power generation means can also be towed by towing means such as a ship, a boat, or an unmanned aerial vehicle on water. While towing one or any number of wave power generation devices having photovoltaic power generation means by the towing means, it is also possible to generate electricity by both sunlight and wave power and store the electricity in a secondary battery.

[0213] All of the technologies related to solar power generation and the solar power generation means described so far can be applied in all embodiments in this specification. Specifically, it can be applied to both an internal power storage type wave power generation device and a power extraction type wave power generation device.

[0214] (2) Wave power generation device with collision prevention function (reflective member · light emitting means) Figure 28F shows a wave power generation device with collision prevention means. Adding collision prevention means (reflective member that reflects light or electromagnetic waves, light emitting means such as red or yellow) to the wave power generation device can achieve significant effects in preventing collisions with other ships and aircraft.

[0215] The sizes of wave power generation devices include those with a diameter of about 2m, those with a diameter of about 4m or more. Since such relatively large wave power generation devices drift singly or in a dispersed manner in multiple units, or are moored or towed singly or in multiple units connected together, preventing collisions with other ships and aircraft is an important issue.

[0216] An example of the collision prevention means is light emitting means. One unit or multiple units of light emitting means are arranged near the top, in the side area, or both of the wave power generation device. The light emitting means preferably consists of multiple light emitting diodes that can change the light emission intensity, change the light emission color, or blink.

[0217] It is desirable to change the light emission intensity and the light emission mode (constant lighting, short - cycle blinking, long - cycle blinking, periodically changing the light emission intensity during constant lighting) of the light emitting means between the bright time zone during the day and the dark time zone at night. For example, if the light emission intensity is reduced at night compared to that during the day, power consumption can be reduced. The determination of the time zone is performed by the (1) overall control unit based on the (10) time management unit in the control system of the aforementioned wave power generation device, and the (1) overall control unit controls the light emission mode of the light emitting means based on the determination result.

[0218] The emission color of the light-emitting means is preferably red as it also matches the image of danger. Also, the yellow emission color matches the image requiring attention, and the recognition ability in poor visibility situations such as thick fog is relatively high, so it can be said that the collision avoidance function is high. Usually, as a collision prevention means, it is desirable to turn on or blink the red light emission, and when the visibility is poor such as when thick fog occurs, switch the light emission mode to yellow lighting or blinking. The occurrence of thick fog or poor visibility situations is detected by sensors built into the wave power generation device, or weather information is obtained from outside the wave power generation device by communication means such as satellite communication. Based on such information, (1) the overall control unit controls the light emission mode.

[0219] Another example of the collision prevention means is the installation of a reflecting member that reflects light or electromagnetic waves. For example, by attaching a belt-shaped light-reflecting member having a fluorescent color with a width of about 50 cm to 80 cm around the entire circumference of the wave power generation device, a collision prevention means can be installed on the wave power generation device. If this belt-shaped light-reflecting member is made of metal (zinc, copper, iron), it reflects electromagnetic waves, so the presence of the wave power generation device can be detected by radar installed on ships or airplanes. Furthermore, if a plurality of arbitrary numbers of belt-shaped reflecting members are attached to the outer circumference of the power generation device at intervals, the visibility and the electromagnetic wave reflection function can be enhanced. Also, the belt-shaped reflecting member may be attached horizontally or attached in an inclined manner.

[0220] When the housing of the wave power generation device is made of a metal such as stainless steel, it reflects electromagnetic waves without any particular measures. However, when the housing is made of polyvinyl chloride or fiber-reinforced plastic (FRP), it is necessary to enhance the electromagnetic wave reflection function by applying a metal spray such as zinc to the housing of the wave power generation device, or attaching or fixing a metal electromagnetic wave reflecting member. It is desirable to apply or install the metal spray such as zinc or attach or fix the metal electromagnetic wave reflecting member inside the housing of the wave power generation device because it is not directly affected by the waves.

[0221] All of the collision prevention technologies and collision prevention means described so far can be applied in all embodiments in this specification. Specifically, it can be applied to both the internal power storage type wave power generation device and the power extraction type wave power generation device.

[0222] (3) Wave power generation device with wind receiving member (mooring / drifting / self-propelled / towed) In an environment such as an inner bay or a lake where there are many quiet wave times, it is predicted that the power generation efficiency of the wave power generation device will decrease. Therefore, a wind power generation means that uses wind power, which is a natural force other than wave power, to generate electricity, or a wave power generation device having a wind receiving member that enhances the power generation efficiency of the wave power generation device will be described. FIG. 28G shows a wave power generation device with a wind receiving member, which is a vibration enhancing means.

[0223] A wind receiving member, which is a vibration enhancing means, is provided at a relatively high position of the wave power generation device to cause the wave power generation device to sway by the wind or to enhance the rocking vibration by the wind, thereby causing the wave power generation device to sway by the wind power and generating electricity. As a result, power generation by wind power, power generation by the combination of wind power and wave power, and power generation by wave power, which are three modes of power generation by natural energy, become possible.

[0224] The wind receiving member can be made of materials such as metal, FRP, polyvinyl chloride, resin, etc. It is desirable that the material of the wind receiving member has flame retardancy. Also, having thermoplasticity is beneficial for improving production efficiency.

[0225] When it is made of metal, since it reflects electromagnetic waves, it is likely to be detected by the radar installed on ships and aircraft. When it is made of materials such as FRP, polyvinyl chloride, resin, etc., if it is painted with zinc spraying or a paint containing metal powder, the reflection of electromagnetic waves can be enhanced as in the case of metal.

[0226] Also, the color of the wind receiving plate is preferably a color that is easy for people to notice, such as yellow, red, fluorescent color, etc. Furthermore, when a plurality of wind receiving members are provided on the wave power generation device, the colors of the wind receiving members can also be configured with different colors.

[0227] The method of attaching a wind receiving member to a wave power generator includes a method of adhesively fixing with an adhesive, a method of fixing with mechanical fixing means such as bolts, nuts, screws, etc., a method of fitting and fixing the base of the wind receiving member into a groove provided on the outside of the wave power generator housing, a method of adhering one side of a magic tape (registered trademark) to the outside of the wave power generator housing and adhering the other side of the magic tape to the base of the wind receiving member, and fixing the wind receiving member to the wave power generator housing with the binding force of the magic tape, etc.

[0228] When the wind receiving member is fixed by mechanical fixing means, when the base of the wind receiving member is fitted and fixed, when the wind receiving member is fixed by the binding force of the magic tape, etc., the wind receiving member can be detachably attached as necessary. When the wave force is stronger than expected or abnormal situations such as typhoons are predicted, it becomes possible to remove the wind receiving member. Of course, after the typhoon has passed, reattachment is possible.

[0229] The number of wind receiving members may be one or any plurality.

[0230] The attachment position of the wind receiving member can be provided at one location or any number at different heights in the height direction of the wave power generator. If the number of attachment positions of the wind receiving member is set to be more than the number of wind receiving members, it becomes possible to change the attachment position of the wind receiving member according to the environmental conditions. Also, according to the environmental conditions, the number of installed wind receiving members can be increased or decreased. Also, it becomes possible to install the wind receiving members at asymmetric positions.

[0231] The shape of the wind receiving member can be configured in any shape such as a triangle, quadrilateral, trapezoid, semi - circle, etc.

[0232] The arrangement method of a wave power generator having any number of wind receiving members or mechanical fixing means or fitting groove structures for attaching any number of wind receiving members can be arranged in all modes of mooring, drifting, self - propelling, and towing.

[0233] The technologies related to the wave power generation device with a wind receiving member for vibration enhancement described so far, and all of the wave power generation means having a wind receiving member can be applied to all the embodiments of the power generation devices in this specification. Specifically, it can be applied to both an internal power storage type wave power generation device and a power extraction type wave power generation device.

[0234] Therefore, all the embodiments of the power generation devices in this specification can be power generation devices having three types of power generation functions: a wind power generation function by a wind receiving member, a solar power generation function by sunlight, and a wave power generation function by waves.

[0235] (4) Wave power generation device with moving means (mooring / drifting / self-propelling / towing) The wave power generation device can perform wave power generation in a moored or drifting situation, so a moving ability (self-propelling ability) is not necessarily required. However, it is beneficial to provide moving means for the wave power generation device itself in order to move for danger avoidance in a situation where a ship is approaching, or to move to a predetermined target position instructed from outside the wave power generation device.

[0236] Figure 28C shows a wave power generation device whose moving means is an underwater drone. Figure 28D shows a wave power generation device having water jet type propulsion means. Figure 28E shows a wave power generation device having propulsion means composed of an electric motor and a screw.

[0237] One of the specific moving means is to provide a wave power generator with a screw and an electric motor for driving the screw. If an electric rudder for direction control is provided in the wave power generator, the traveling direction of the wave power generator can be controlled. Also, if a pair of screws are provided and the rotation of each screw can be controlled, the traveling direction of the wave power generator can be controlled. For example, when one screw is rotated while the other screw is stopped, the traveling direction of the wave power generator bends towards the side of the stopped screw. To control the rotation of each screw, there are a method of providing a driving electric motor for each screw, and a method of providing an electromagnetic clutch on each of the two screw shafts and selectively transmitting and controlling the rotational force of the electric motor to the screw shaft via the electromagnetic clutch. In each case, the electric motor for driving the screw, the electromagnetic clutch, the electric rudder, etc. use the secondary battery in the wave power generator as a power source, and are controlled by the (1) overall control unit or (2) artificial intelligence control unit of the control system via the (14) movement control unit.

[0238] A wave power generator having a screw as a moving means directly exerts a propulsive force on seawater or fresh water with the screw protruding outside the housing of the wave power generator, so that a moving force can be obtained efficiently.

[0239] As another moving means for the wave power generator, a water jet engine mechanism as used in a water bike can be used. In this case, the water pumped up from underwater into the water duct is discharged forcefully from the rear jet outlet by an electric high-pressure pump (which rotates a screw provided in the water duct to move seawater or fresh water to the jet outlet), which is the power source, to obtain a propulsive force. Also in this case, similar to the case where the wave power generator has a screw driven by an electric motor as a moving means, the secondary battery in the wave power generator can be used as a power source, and the moving speed of the wave power generator can be controlled by an electric signal.

[0240] The moving direction of the wave power generation device can be controlled by driving the rudder provided at the bottom of the wave power generation device with a driving source such as an electric motor. In addition, a pair of water jet ports and an electric high-pressure pump are provided at a predetermined interval in the wave power generation device, and the moving direction of the wave power generation device can be controlled by providing a water jet force difference between the respective jet ports. For example, while ejecting water flow from the jet port with one electric high-pressure pump, if the other electric high-pressure pump is stopped to eliminate the water flow ejection from the jet port, the traveling direction of the wave power generation device can be controlled.

[0241] When the moving means of the wave power generation device is a water jet engine mechanism, the movable parts such as the screw can be prevented from being exposed outside the housing of the wave power generation device, so that the damage of the movable parts can be reduced. Therefore, the operation and movement of the wave power generation device are possible even in relatively shallow waters. In addition, when the wave power generation device is landed on land or hoisted onto a ship, there is an advantage that the movable parts such as the screw do not get in the way.

[0242] Other moving means provided in the wave power generation device include water drones and underwater drones. Water drones and underwater drones have an electric motor as a power source and a secondary battery as a power source inside, and have a screw and an electric rudder outside, and have propulsion power and the ability to select the traveling direction. Instead of providing an electric rudder, a pair of screws can be provided, and the traveling direction of the drone can be controlled by the difference in the rotation speed of the screws. In addition, it is also possible to provide a pair of water jet engine mechanisms as described above to perform propulsion speed control and direction control.

[0243] Water drones and underwater drones are connected to the wave power generation device by a rope and can pull and move the wave power generation device. If the control system provided in the wave power generation device described above is provided in the water drone or underwater drone, the water drone or underwater drone can be remotely controlled or self-propelled.

[0244] Also, when connecting an underwater drone or a submersible drone to a wave power generation device with a waterproof electric cable, the underwater drone or the submersible drone can utilize the control system and the secondary battery as a power source within the wave power generation device. More specifically, connect the secondary battery within the wave power generation device and the electric motors or electric rudders within the underwater drone or the submersible drone with a waterproof electric cable, and the power of the secondary battery within the wave power generation device can be used by the electric motors or electric rudders within the underwater drone or the submersible drone. Further, by connecting the control system within the wave power generation device and the control system within the underwater drone or the submersible drone with a waterproof electric cable, the (1) overall control unit or (2) artificial intelligence control unit on the wave power generation device side can control or autonomously control the underwater drone or the submersible drone.

[0245] The underwater drone or the submersible drone and the wave power generation device are connected by a rope and a waterproof electric cable, but it is desirable to make the strength of the rope stronger than that of the waterproof electric cable and make the length of the waterproof electric cable longer than that of the rope.

[0246] The rope and the waterproof electric cable connecting the underwater drone or the submersible drone and the wave power generation device can be integrated into a single cable to connect the underwater drone or the submersible drone and the wave power generation device.

[0247] A wave power generation device having an underwater drone or a submersible drone as a moving means can be connected by a rope to one or any number of wave power generation devices. In that case, a single underwater drone or submersible drone can move any number of multiple wave power generation devices.

[0248] For the method of floating installation of a wave power generation device with moving means, mooring installation using a rope with a fixed object partially fixed to the seabed can be performed. In this case, wave power generation is usually carried out by waves to charge the secondary battery in the wave power generation device. The wave power generation device can move within the range of the rope length as required. It can also move by receiving a movement instruction from outside the wave power generation device through communication means such as satellite communication, or by autonomous control using program control or artificial intelligence within the wave power generation device.

[0249] There is also a method of drifting for the method of floating installation of a wave power generation device with moving means. While drifting at the mercy of the flow of waves and tides, wave power generation is carried out by waves to accumulate natural energy in the secondary battery in the wave power generation device. Since the control system of the wave power generation device is equipped with a GPS device and an antenna, the position of the wave power generation device during drifting can also be grasped at a management center on land or on a ship. Also, the (2) artificial intelligence unit in the wave power generation device also knows its own position. The drifting type wave power generation device moves towards a predetermined position when the charging of the secondary battery exceeds a predetermined level, or when the drift goes out of or is about to go out of a predetermined area. The predetermined position can be a management center on land or on a ship, or a meeting place with a wave power generation device recovery ship. Also, in order to avoid encountering a typhoon or colliding with a ship, it can also move by remote control from a management center or by autonomous judgment by the (2) artificial intelligence unit. The wave power generation device with moving means can be applied to both internal power storage type wave power generation devices and power extraction type wave power generation devices.

[0250] Next, other uses of the wave power generation device will be further explained.

[0251] (1) Marine mobile phone base station (moored) An antenna for a mobile phone base station such as 4G or 5G, a mobile phone communication base station device, a wired cable for connecting this mobile phone communication base station device to a mobile base station on land, and a wireless communication device can be provided in the wave power generation device to operate a marine mobile phone base station.

[0252] Figures 29A to 29E show an embodiment in which a mobile phone base station is constructed using a wave power generation device. The mobile phone base station in Figure 29A is composed of an internal power storage type wave power generation device. The wave power generation device of the mobile phone base station having a mobile communication base station device and an antenna for a mobile phone base station can be relayed and connected to a mobile phone communication base station on land using a wired cable or a wireless communication device. The power required for operating the mobile phone base station on water can be covered by the power generation of the wave power generation device.

[0253] If an omnidirectional antenna for a mobile base station is installed near the top of wave power generation having a diameter of 4 m, a mobile phone communication relay cell with a radius of about 500 m to 2 km can be provided in all directions of 360 degrees.

[0254] If a wave power generation device having a mobile base station function is moored to a mooring means on a predetermined body of water, a mobile phone can be used on a ship on water or on land near the water's edge within a mobile phone communication relay cell with a radius of about 500 m to 2 km centered on the mooring location. It is desirable to describe on the housing of the wave power generation device that becomes a mobile phone base station on water so that information capable of identifying a mobile carrier can be recognized. This is because the owner of the mobile terminal can determine the communication availability of the mobile terminal.

[0255] The wave power generation device having a mobile phone base station function on water may be installed in a relatively calm inner bay or lake. In an environment where these waves are small or few, it is desirable to add a solar power generation means to supplement the wave power generation, or to attach a wind receiving member, a weight, and other swing strengthening members to the housing of the wave power generation device to strengthen the swing of the wave power generation device by the wind.

[0256] It is desirable that the wind-receiving member and the oscillation reinforcement members such as weights be detachably attached to the wave power generation device. The number of wind-receiving members and weights can be any number of one or more. The shapes of the wind-receiving members and weights can be selected from any shapes such as rectangles, trapezoids, semi-circles, etc. The colors of the wind-receiving members and weights may be the same color or the same color system as the color of the wave power generation device housing, or may be different colors from the color of the wave power generation device housing. The colors of the wind-receiving members and weights are preferably fluorescent colors in the yellow or red systems. The material of the wind-receiving member is preferably composed of a metal such as stainless steel or aluminum, FRP, or a flame-retardant material such as polyvinyl chloride. Of course, both the solar power generation means and the means for strengthening the oscillation of the wave power generation device by the wind can be provided in the wave power generation device.

[0257] The solar power generation means can be installed by installing a solar panel at a high part of the wave power generation device housing, or by constructing the housing of the wave power generation device with transparent polyvinyl chloride and installing the solar power generation panel inside the housing of the power generation device. In these embodiments, the solar panel and the secondary battery for power storage are connected by a conductive cable in order to store the electrical energy generated by the solar panel in the secondary battery for power storage inside the wave power generation device.

[0258] The addition of such oscillation reinforcement members and the addition of solar power generation means can also be applied in all the embodiments described in this specification.

[0259] So far, the wave power generation device used in the mobile phone base station on the water has been described as an internal power storage type wave power generation device, but a combination of a power extraction type wave power generation device and a floating body power storage device can also be used. The floating body power storage device may be the same floating body power storage device as that shown in FIG. 39.

[0260] Embodiments of a mobile phone base station on water using a combination of a power extraction type wave power generator and a floating body energy storage device are shown in FIGS. 29B and 29E. The power generated by the wave power generation means or the solar power generation means of the power extraction type wave power generator is stored in the energy storage means inside the floating body energy storage device connected by a power transmission cable and a connection cable. The power consumed by the control system of the power extraction type wave power generator and the mobile phone communication base station device is supplied from the energy storage means in the floating body energy storage device. Since the energy storage means in the floating body energy storage device has a larger energy storage capacity than the energy storage means of the internal energy storage type wave power generator, it can withstand even if a calm wave situation continues for a long time. In the unlikely event that the power storage amount of the energy storage means inside the floating body energy storage device is about to run out, it is possible to notify the management center from the (3) communication control unit of the power extraction type wave power generator or the control system equipped in the floating body energy storage device that there is a possibility of power shortage. The management center that has received the notification will tow a floating body energy storage device with sufficient power storage by ship and head towards the mobile phone base station on water. And the floating body energy storage device of the mobile phone base station on water can be replaced.

[0261] So far, the description has been made with one floating body energy storage device installed, but it is also possible to increase and install as many as necessary, such as two or three. In this way, if the mobile phone base station on water is configured with a combination of a power extraction type wave power generator and a floating body energy storage device, the power for operating the mobile phone base station on water will never run out semi-permanently.

[0262] Also, so far, the mobile phone base station on water has been described as using a combination of a power extraction type wave power generator and a floating body energy storage device, but it is also possible to use only the floating body energy storage device without using a wave power generator. That is, it is also possible to remove the power extraction type wave power generator from the embodiment of the mobile phone base station on water shown in FIG. 29E, directly moor the floating body energy storage device to the mooring means on water, and supply power directly from the floating body energy storage device to the mobile phone communication base station device. In that case, it is desirable that the floating body energy storage device has solar power generation means. Also, the floating body energy storage device may be the same floating body energy storage device as shown in FIG. 39.

[0263] Furthermore, the floating body power storage device can be connected in parallel or in series in any number. When the power storage capacity of the floating body power storage device decreases, a floating body power storage device with sufficient power storage can be towed by a ship towards the floating base station on the water, and the floating body power storage device of the floating base station on the water can be replaced to handle the situation.

[0264] As another modified embodiment of FIG. 29E, power supply to the mobile phone communication base station device (sub-base station) installed on the pillar provided on the water shown in FIG. 29E can be provided from a DC battery, an AC power generation device, an AC power supply, etc. installed on land via a waterproof conductive cable. When supplying AC power from an AC power generation device or an AC power supply on land, it is converted into DC power by a power supply circuit provided in the mobile phone communication base station device (sub-base station).

[0265] In the case of this embodiment of supplying power from land, neither the wave power generation device nor the floating body power storage device shown in FIG. 29E is required.

[0266] FIG. 29C shows an embodiment of a movable floating mobile phone base station constructed by providing a mobile internal power storage type wave power generation device equipped with a moving means with an antenna for a mobile phone base station such as 4G and 5G, a mobile phone communication base station device, and a wireless communication device for connecting this floating mobile phone communication base station and a mobile phone communication base station on land. The difference from FIG. 29A is that it is not moored by a mooring means. The floating mobile phone base station constructed by a movable internal power storage type wave power generation device can be moved to a required location or move autonomously. As a result, mobile phone relaying can be provided in a wider area than the moored floating mobile phone base station.

[0267] FIGS. 29D and 29E show an embodiment in which an omnidirectional antenna for a mobile phone base station such as 4G and 5G is installed on a pillar extending from a fixed member fixed to the bottom of the water to the water surface as an artificial mooring means. By selecting the height of the pillar to an arbitrary height, a mobile phone communication relay cell of about several tens of km can be provided.

[0268] Figure 29D shows that omnidirectional antennas or directional antennas for mobile phone base stations such as 4G and 5G are installed near the top of the column of the mooring means, and an internal battery-type wave power generation device is moored to the mooring means. A waterproof cable connector as the input / output means shown in Figure 23B is provided on the housing of this internal battery-type wave power generation device. One end of a waterproof conductive cable, whose other end is connected to the aforementioned antenna, is connected to the outer convex terminal of this waterproof cable connector. Also, the inner convex terminal corresponding to the outer convex terminal is connected to the (13) external option control unit option connector of the control unit of the wave power generation device by a waterproof conductive cable. As a result, the omnidirectional antenna for the mobile phone base station will be connected to the (3) communication control unit of the control system of the wave power generation device.

[0269] The mobile phone communication base station device (4G / 5G transceiver) may be provided inside the housing of the wave power generation device, or as shown in Figure 29E, it may be housed in a waterproof box and installed on the column of the mooring means. When installed on the column of the mooring means, the power supply to the mobile phone communication base station device (4G / 5G transceiver) is carried out by a waterproof conductive cable from the power storage means built into the wave power generation device via a waterproof cable connector having a power extraction function. The relay connection between the mobile phone communication base station on land (parent base station) and the mobile phone communication base station device on the column (child base station) is either wireless communication (wireless entrance method) using a parabolic antenna, or as shown in Figure 29E, by optical communication via a waterproof wired cable (optical fiber cable) connecting the mobile phone communication base station device (child base station) and the mobile phone communication base station on land (parent base station). When connecting the mobile phone communication base station device on the column (child base station) and the mobile phone communication base station on land (parent base station) by wireless communication (wireless entrance method) using a parabolic antenna, a parabolic antenna (not shown in the figure) is installed on the column shown in Figure 29E, and relay is carried out by wireless communication with the parabolic antenna installed at the mobile phone communication base station on land (parent base station).

[0270] When a mobile phone communication base station device is provided inside a wave power generation device housing, the mobile phone communication base station device is connected to the (13) external option control unit option connector. The relay connection between the terrestrial mobile phone communication base station and the mobile phone communication base station device provided inside the wave power generation device is either wireless communication using a parabolic antenna provided in the wave power generation device or a waterproof wired cable (optical fiber cable for optical communication) via a waterproof cable connector between the (13) external option control unit option connector of the wave power generation device and the terrestrial mobile phone communication base station.

[0271] Figure 29E shows a power extraction type wave power generation device combined with a floating body energy storage device, moored to a column extending above the water surface from a fixed member fixedly installed on the seabed, instead of the internal energy storage type wave power generation device in the embodiment of Figure 29D. And an omnidirectional antenna or a directional antenna for a mobile phone base station such as 4G or 5G is installed near the top of the column, and a mobile phone communication base station device housed in a waterproof BOX is installed at an intermediate position of the column. The power supply to the mobile phone communication base station device and the power extraction type wave power generation device is supplied from the floating body energy storage device. In that case, as the waterproof cable connector provided in the power extraction type wave power generation device, the one shown in Figure 23D in which the power input / output means and the signal input / output means with the backflow prevention means removed from the waterproof cable connector shown in Figure 23C may be used. In that case, the power generated by the power extraction type wave power generation device is stored in the energy storage means in the floating body energy storage device. And power supply from the floating body energy storage device to the inside of the power extraction type wave power generation device and power supply to the mobile phone communication base station device installed outside the power extraction type wave power generation device can be performed.

[0272] The relay connection between the terrestrial mobile phone communication base station and the marine mobile base station may be performed by wireless means using a parabolic antenna installed on a column extending above the water surface from a fixed member fixedly installed on the seabed, in the same manner as in the embodiment of Figure 29D.

[0273] (2) Marine weather and tidal current observation station (moored, self-propelled, towed) If a wave power generation device is equipped with weather observation sensors (temperature, humidity, atmospheric pressure, wind force) and underwater sensors (tidal current velocity measurement sensor, tidal current direction sensor, water temperature, wave period sensor, wave height measurement sensor), an on-water weather and tidal current observation station can be established.

[0274] Figure 30 shows an embodiment in which an on-water weather observation station and an on-water tidal current observation station are constructed using a wave power generation device. A weather observation box with built-in weather observation sensors is installed outside the housing of the wave power generation device. A high position (e.g., near the top) of the wave power generation device housing is suitable. On the other hand, the underwater sensors are arranged at a low position outside the wave power generation device housing. A position where the wave power generation device housing is submerged below the water surface when wave power generation is carried out is suitable. A box with built-in underwater sensors can also be installed integrally with the housing at the position where the wave power generation device housing is submerged. Also, a waterproof electric cable can be hung into the water from the wave power generation device for a predetermined length, and a box with built-in underwater sensors can be attached to the tip. In this case, data such as tidal current and water temperature at a predetermined depth can be obtained. Also, a plurality of underwater sensor boxes with built-in underwater sensors can be installed at different depth positions. In that case, respective tidal current data at different depths can be obtained.

[0275] The measurement data of the weather observation sensors and the underwater sensors can be used by the control system of the wave power generation device, or can be transmitted to a management center on land or on a ship via communication means such as satellite communication. The power used by the weather observation sensors and the underwater sensors, and the power for transmitting the measurement results to a management center on land or on a ship can be covered by the power generated by the wave power generation device. Therefore, weather observation and tidal current observation can be carried out on water for a long period of time, not only for several months but also for over a year.

[0276] A wave power generation device having sensors for meteorological observation and sensors for tidal current can be detachably moored to a fixed object fixed at a specific position or an object (buoy or floating object) tied to the fixed object with a rope. Also, a wave power generation device having sensors for meteorological observation and sensors for tidal current can be allowed to drift on the water surface. Furthermore, a wave power generation device having sensors for meteorological observation and sensors for tidal current and having a self-propelling function can perform meteorological observation and tidal current observation while performing self-propelling and drifting.

[0277] A wave power generation device having sensors for meteorological observation and sensors for underwater has a (10) time management unit and a (3) communication control unit having various communication devices such as a GPS antenna and a satellite communication device. Therefore, the output data of the sensors for meteorological observation and the output data of the sensors for underwater can be sent to a management center installed on land or on a ship in association with the position data, date data, and time data of the wave power generation device. An internal storage type wave power generation device is suitable for this application.

[0278] (3) Fish aggregating lamp (mooring / self-propelling / towing) By providing one or a plurality of light emitting means at one position or an arbitrary number of positions on the wave power generation device, it can be used as a fish aggregating means. If the position where the light emitting means is attached is arranged at a high place, fish can be aggregated over a wide area. It can be provided near the top of the wave power generation device housing, or a pillar or a pedestal can be provided near the top and the light emitting means can be provided at the tip thereof. On the other hand, if the light emitting means is provided at a position close to the water surface, stronger light can be projected into the water, so it is also effective to install it on the side or lower part of the wave power generation device housing. Furthermore, it is also effective to provide a light emitting means having a waterproof function at a position where the wave power generation device housing is submerged. Also, a light emitting means having a waterproof function can be attached to a waterproof electric cable having a predetermined length and suspended into the water from the wave power generation device.

[0279] Each of FIGS. 31A to 31G illustrates an embodiment in which the wave power generation device is used as a fish aggregating lamp.

[0280] Since the wave power generation device having a light emitting means has the aforementioned control system and a (7) lighting control unit, it is possible to control the ON / OFF of the light emission of the light emitting means, the light emission intensity, the light emission color, and the light emission mode (lighting, blinking, lighting with variable light emission intensity, blinking with variable light emission intensity). Further, since the wave power generation device has a secondary battery charged by wave power generation, it can cover not only the power consumed by the light emitting means but also the power consumed by the wave power generation device such as the (7) lighting control unit, the (3) communication control unit, the (10) time management unit, and the like.

[0281] The wave power generation device with a fish aggregating function having a light emitting means can be placed on a fishing boat or towed by a rope to move to a fishing ground. In the fishing ground, it can be floated beside the fishing boat and the light emitting means can be made to emit light while generating wave power to aggregate fish. Also, it can be detachably moored to a fixed object provided on the water or a floating body such as a buoy, and wave power generation and light emission for fish aggregation can be carried out in parallel.

[0282] Furthermore, even if the wave power generation device with a fish aggregating function having a light emitting means is not taken to the fishing ground, fish can be aggregated at the installed location. For example, one or any number of wave power generation devices with a fish aggregating function having a light emitting means are moored and installed on the water about 100 m away from the land. Then, jointly by the (7) lighting control unit and the (10) time management unit, the light emitting means can be made to emit light in various light emission modes from around sunset to dawn every day, so that a variety of fish can be aggregated around the wave power generation device. As a result, it is possible to turn an arbitrary place into a fishing ground or provide a leisure fishing place.

[0283] Also, the wave power generation device with a fish aggregating function having a light emitting means can be installed by drifting or mooring on the water surface inside a fish farm surrounded by a net. In the fish farm, at any time, the light emitting means can be controlled to emit light near the water surface or at an arbitrary depth to aggregate the cultured fish, so that efficient feeding can be carried out.

[0284] In addition, the aforementioned (7) lighting control unit can control the brightness of the underwater light-emitting part, the lighting time, and the length of the lighting period to provide a predetermined light cycle, thereby shortening the day-night cycle for the cultured fish and promoting the growth of the cultured fish.

[0285] (4) Seawater tank feeding management and power supply system (mooring) Figure 32 shows a seawater tank system using a wave power generation device. For aquaculture facilities for culturing fish such as tilapia, tuna, flounder, salmon, sea bream, etc., a seawater tank for fish culture composed of a float and a net is provided. In this seawater tank for fish culture, a feeding machine for feeding the cultured fish, an underwater high-definition (4K·8K) monitoring camera, underwater and surface lighting means, an underwater high-definition (4K·8K) camera, an underwater sensor box, a weather observation box with a weather observation sensor built in, etc. are installed. The feeding machine has a programmable feeding function that self-executes a predetermined amount of feeding at predetermined time intervals or at each predetermined time by program control, and a remote operation feeding function that performs feeding of an arbitrary amount at an arbitrary timing by remote control via a communication path from the outside.

[0286] The power supply to the electrical equipment installed in the seawater tank for aquaculture, such as these feeding machines, underwater and surface lighting means, underwater high-definition (4K·8K) cameras, surface high-definition (4K·8K) cameras, underwater sensor boxes, weather observation boxes, the float installation described later, 5G mobile communication terminals, etc., which operate on electricity, can be carried out directly or indirectly by the secondary battery for power storage built in the wave power generation device. When directly supplying power to the electrical equipment, it can be realized by directly connecting each electrical equipment installed in the seawater tank for aquaculture that operates on electricity and the secondary battery in the wave power generation device with a conductive cable for power supply. When indirectly supplying power to the electrical equipment, a secondary battery with a predetermined capacity is provided in the float part of the seawater tank for fish culture, and the secondary battery on this float and each electrical equipment that operates on electricity are connected with a conductive cable for power supply, and power is supplied from the secondary battery on the float to each electrical equipment. Then, in order to charge the secondary battery on this float, the secondary battery on the float and the secondary battery in the wave power generation device are connected with a conductive cable.

[0287] Alternatively, connection relay means is provided on the float, and the other end of a waterproof conductive cable connected to a waterproof cable connector, which is the power extraction means of the power extraction type wave power generator, is detachably connected thereto. Then, each electric device installed in the aquaculture cage and operating with electricity is detachably connected to the connection relay means on the float by a waterproof conductive cable. As a result, indirect power supply from the secondary battery in the wave power generator to each electric device on the float can be realized. The power extraction type wave power generator is moored to the float of the mooring means by one or a plurality of units.

[0288] In addition, each electric device installed in the aquaculture cage and operating with electricity is connected to the aforementioned control system provided in the wave power generator housing by a control signal cable, and can mutually transmit and receive electrical signals. Also, when the electric device has a wireless communication function such as Wi-Fi communication, signal and information communication can be performed wirelessly with the aforementioned control system in the wave power generator. For example, the underwater lighting means installed in the water in the aquaculture cage is connected to the (7) lighting control unit of the control system in the wave power generator by wire or wirelessly, and the brightness, lighting time, and lighting duration of the underwater light emitting part are controlled by the (7) lighting control unit to provide a predetermined light cycle, thereby shortening the day and night cycle for the cultured fish and promoting the growth of the cultured fish.

[0289] The feeder stores, for example, moist pellets or dry pellets made by solidifying fish meal or the like in a large-capacity tank of about 6000 liters, and drops a predetermined amount of moist pellets or dry pellets into the cage at predetermined intervals to feed the cultured fish. Important issues of the feeder are (1) long-term power supply to the feeder, (2) control of the feeding amount to the cultured fish, and (3) detection of the remaining amount of the pellet as feed and diagnosis of equipment failure.

[0290] (1) Regarding the issue of long-term power supply to the feeder, it can be achieved by increasing the capacity of the secondary battery installed in the float part of the fishpond. However, there are also physical limitations in the float part, and there is a certain limit to the capacity of the secondary battery. Therefore, it can be solved by installing a power extraction type wave power generator that can directly or indirectly supply power to the feeder in the fishpond for aquaculture. A wave power generator equipped with solar power generation means can ensure the power generation amount even when there are few waves. In addition, wave power generation with means for enhancing oscillation / vibration such as weights and wind receiving members, and a wave power generator having both means for enhancing oscillation and solar power generation means can supply power more stably.

[0291] Furthermore, when more power is required, it can be achieved by mooring and installing the required number of power extraction type wave power generators in the fishpond for aquaculture.

[0292] (2) The issue of optimizing the feeding amount control for farmed fish is an important issue both economically and from the perspective of environmental protection. Moist pellets and dry pellets, which are the feed for farmed fish, are expensive. If they are supplied excessively so that the farmed fish leave some uneaten, or are supplied in a situation where the appetite and activity of the farmed fish are low (they do not eat dry pellets), it will result in waste and put pressure on the profits of the aquaculture business. In addition, the uneaten dry pellets will sink to the bottom of the water and pollute the environment.

[0293] Therefore, it is necessary to feed the optimal amount of dry pellets to the farmed fish, based on their appetite and feeding status, so that there is almost no leftover food. To achieve this, high-resolution cameras (HD cameras or 4K or 8K high-resolution cameras) are used to capture the feeding status of farmed fish in aquaculture ponds from above or below the water, and humans or artificial intelligence can use these images (or both) to assess the appetite and activity of the farmed fish and control the amount of feed given to the farmed fish accordingly. The high-resolution camera is installed above the water in a position that captures the image of the farmed fish's feeding status within its field of view. More specifically, it is desirable to position the high-resolution camera above the water so that the position where the dry pellets drop from the feeder onto the water surface is approximately centered within the field of view of the high-resolution camera. The high-resolution camera begins filming the farmed fish's feeding status before the feeder starts feeding. After feeding begins, the time is measured while filming the farmed fish's feeding status. As a result, measurement data relating to time, such as the time at which feeding began, the time at which the fish gathered, the time at which the feeding of the farmed fish increased or peaked, the time at which feeding began to decline, and the time at which feeding almost stopped, are linked to images of the fish's feeding status and recorded, and sent to a 5G communication terminal installed in the fish pond management center, or to the cloud or artificial intelligence means within the wave power generation device.

[0294] The timing for the feeder to stop feeding is preferably when the farmed fish are still feeding after a predetermined time has passed since their feeding status has peaked and their feeding status has begun to decline. It is also effective to reduce the amount of feed by a predetermined amount (for example, about 10%) when the farmed fish reach their peak feeding status or a predetermined time has passed since their peak, or to reduce the amount of feed by a predetermined amount (for example, about 10%) once or multiple times after their feeding status has begun to decline.

[0295] In the case of a high-definition image or a 4K image captured by a high-definition camera such as a high-definition quality camera or a 4K quality camera, a person or artificial intelligence can recognize, analyze, and evaluate in detail the feeding situation of the cultured fish when feeding the cultured fish. For example, a person or artificial intelligence can recognize, analyze, and evaluate in detail the feeding situation of the cultured fish, such as the situation where feeding is heading towards the peak, the situation where feeding is approximately at the peak, the situation where feeding has begun to decline, the situation where feeding is declining, the situation where feeding is heading towards the end, the situation where feeding is approximately over, etc.

[0296] The timing for the feeder to stop feeding is preferably the situation where feeding is heading towards the end or the situation where feeding is approximately over.

[0297] If a reference object (a scale-equipped measure or a fish body model of a predetermined size) for measuring the size of the cultured fish is installed within the viewing angle of the high-quality underwater (4K) camera, it becomes possible to measure the size (growth degree) of the cultured fish. If the image is stopped at a predetermined timing, it can be measured more accurately. Therefore, the manager at the management center or the artificial intelligence can grasp the growth state of the aquaculture industry, which can be used as reference information for controlling the feeding amount of the feeder or as a material for judging the harvesting time of the cultured fish.

[0298] For example, the artificial intelligence system provided in the artificial intelligence unit (2) in the manager at the net cage management center on the ground at a predetermined distance from the location where the aquaculture net cage is located, within the net cage management center, on the cloud, or in the wave power generation device moored and installed on the aquaculture net cage, can recognize, analyze, and evaluate in detail the feeding situation of the cultured fish when feeding the cultured fish. In addition, the growth degree and the size of the fish body of the cultured fish can be recognized, analyzed, and evaluated in detail, and machine learning for deriving the optimal feeding amount based on the data can also be performed.

[0299] However, in order to transmit high-definition images with a large amount of information, such as high-definition images, 4K images, 8K images, etc., in real time, a 5G communication environment is required. Therefore, a high-definition image captured by a high-definition camera is transmitted from a 5G communication terminal installed on the float of the aquaculture cage or provided in the (3) communication control unit in the wave power generation device moored to the aquaculture cage, via a 5G base station, to a 5G communication terminal provided in the cage management center. The 5G communication terminal of the cage management center provides or displays a high-definition image of the underwater or above-water feeding situation of the cultured fish when feeding the cultured fish to an artificial intelligence system in the cage management center or on the cloud, or a high-quality monitor visible to the administrator, almost in real time. When the artificial intelligence makes a judgment, it compares the sent high-definition image, environmental information such as water temperature, time information, fish body growth length (size of the fish body), and the learned data obtained by machine learning with the high-definition image of the feeding situation of the cultured fish when feeding the cultured fish in the past, environmental information such as water temperature, time information, fish body growth length (size of the fish body), and can autonomously and automatically control the feeding timing and feeding amount. When a person in the cage management center makes a judgment, while observing the high-definition image related to the feeding situation of the cultured fish on the high-quality monitor in the cage management center almost in real time, referring to environmental information such as water temperature, image information related to the feeding situation and its changes, time information after the start of feeding, time information, fish body growth length, etc., the feeding amount control, feeding start timing, feeding stop timing, etc. of the feeder can be remotely controlled via the 5G communication environment.

[0300] (3)Regarding the issues of detecting the remaining amount of pellets as bait and diagnosing equipment failures, it can be solved by connecting the feeder and the (13) external option control unit in the wave power generation device with a control signal cable. Specifically, the output signal from the remaining amount detection sensor that detects the remaining amount of pellets in the feeder, and the output signals from the power supply, feeding motor, programmable controller, temperature sensor, etc. in the feeder can be sent via the control signal cable to the (13) external option control unit in the wave power generation device moored to the aquaculture cage. The (13) external option control unit sends those output signals sent from the feeder via the internal bus of the control system to the (11) management control unit that performs failure diagnosis, the (1) overall control unit, and the (2) artificial intelligence unit, and can perform control according to the detection of the remaining amount of pellets, and failure diagnosis and countermeasure control of the feeder.

[0301] Note that the entire aquaculture cage may drift and the installation location may change. To move the entire aquaculture cage to a predetermined position, the entire aquaculture cage is tied to a manned ship or the like with a rope and moved by the moving means (screw) of the manned ship. However, by mooring one or more self-propelled wave power generation devices having self-propelled means such as screws or water jet engines to the aquaculture cage, it becomes possible to unmannedly move the entire aquaculture cage to an arbitrary position by remote control or autonomous control by artificial intelligence.

[0302] In addition, if a wind power generation function by a wind receiving member and a solar power generation function by sunlight are additionally installed in the wave power generation device used in the aquaculture cage, it is possible to provide a power generation device that performs power generation by three types of natural energy in combination with the wave power generation function by waves, and it is possible to provide a power generation device that performs power generation more stably.

[0303] So far, in the (4) cage feeding management and power supply system (mooring), the power extraction type wave power generation device has been mainly described as the power means. However, instead of the power extraction type wave power generation device, one or more floating battery devices or floating battery devices having solar power generation means can also be used.

[0304] Next, an example of an assembly consisting of a plurality of wave power generation devices will be described. (1) Connecting tools and connecting means (ropes) of wave power generation devices Although the wave power generation device can be operated alone, it is also possible to connect one or more arbitrary numbers of wave power generation devices and operate them collectively as a wave power generation device assembly.

[0305] FIG. 33 shows a connecting tool of a wave power generation device and a connecting rope as connecting means. Here, the connecting means is described by taking the case of a rope, but as long as it can be physically connected, it may be a chain or a rod-shaped member.

[0306] In preparation for the collective operation of wave power generation devices or the mooring of wave power generation devices, one or a plurality of connecting tools are provided on the housing of the wave power generation device. The connecting tool has a ring portion having a predetermined size and a shaft portion integrally formed with the ring portion. A screw is cut on the side of the shaft portion without the ring. An opening into which the shaft portion of the connecting tool can be inserted is provided at the connecting tool attachment position of the wave power generation device housing. The shaft portion of the connecting tool is inserted into this opening and fixed with a fixing nut from the inside of the wave power generation device housing. A waterproof packing is sandwiched between the fixing nut and the inside of the housing. A waterproof sealing is applied with a waterproof sealing material between the aforementioned opening and the shaft portion of the connecting tool. A waterproof packing is also sandwiched between the outside of the housing and the connecting tool. In this way, the connecting tool is attached to the wave power generation device housing with a waterproof structure.

[0307] The material of the connecting tool has a predetermined strength and rust prevention property. For example, it is desirable to make it of stainless steel.

[0308] The number of connecting tool attachment positions on the wave power generation device housing may be only one, but it is desirable to have a plurality. Also, it is desirable to have a plurality of heights of the connecting tool attachment positions on the wave power generation device housing.

[0309] For example, it is desirable to attach connecting devices at about three to four locations at different height positions, such as positions about 30 cm higher or lower than the waterline, positions at about half the height of the wave power generation device housing, and positions near the top of the wave power generation device. Also, it is desirable to attach about two to four connecting devices at the same height position. This is because the optimal connection height is different when the wave power generation devices are moving in a group or when wave power generation is carried out in a group. Also, when wave power generation is carried out in a group, the connection height of each wave power generation device may be changed according to the wave height.

[0310] The connecting means for detachably connecting the wave power generation devices includes a rope having a predetermined strength, and swivel-equipped carabiners are attached to both ends of this rope. A swivel is a connecting part or connecting member that has two connection points and can rotate freely with respect to each other. In fishing gear and the like, it is also called a "swivel". The swivel-equipped carabiner can be detachably attached to the ring-shaped part of the connecting device. Also, the swivel attached to the carabiner allows the carabiner to rotate freely, so the swinging resistance during the swinging of the wave power generation device by the waves can be reduced. However, a carabiner without a swivel can also be used.

[0311] This detachable connecting means for the wave power generation device and the connecting device for the wave power generation device housing can be used in all the embodiments described so far and all the embodiments to be described hereinafter for the wave power generation device and the floating body power storage device.

[0312] (2) Ship-towed type multiple wave power generation device assembly (assembly system) For example, any number of wave power generation devices can be detachably connected by a coupler and a connecting rope, and while towing a plurality of such wave power generation device assemblies by a ship, wave power generation can be carried out or the assemblies can be moved to any location. In this case, the ship may be a ship that moves using a fossil fuel engine that uses fossil fuel, but it is preferably an electric ship that rotationally drives a screw in the water with an electric motor. This electric ship is equipped with a rechargeable secondary battery, but it is desirable that the secondary battery in the wave power generation device and the secondary battery of the electric ship are detachably connected by a conductive cable so that the stored power of the secondary battery in the wave power generation device can be utilized.

[0313] FIG. 34 shows a situation where a ship is towing and moving a wave power generation device assembly in which a plurality of wave power generation devices are assembled. Each wave power generation device may be an internal power storage type wave power generation device or a power extraction type wave power generation device.

[0314] In addition, if a wind power generation function using a wind receiving member or a solar power generation function using sunlight is additionally installed in the wave power generation device used in the multiple wave power generation device assembly system, a power generation device that performs power generation using two or three types of natural energy in combination with the wave power generation function by waves can be provided.

[0315] (3) Floating mooring type multiple wave power generation device assembly system Wave power generation can be carried out while drifting an assembly in which a plurality of wave power generation devices are connected, or wave power generation can also be carried out by detachably mooring to floating mooring means (a structure extending above the water surface from a fixed member fixedly installed on the bottom of the water, or a floating body connected by a rope or the like to a weight dropped to the bottom of the water). FIG. 35 shows a situation where the wave power generation device assembly is moored.

[0316] The mooring means is a structure such as a pile or a column extending above the water surface from a fixed member fixedly installed on the bottom of the water, and the float part moves vertically along the pile, column, etc. according to the fluctuation of the water level. Stoppers are provided at the upper ends of the pile, column, etc. to limit the upward movement of the float. (Mooring means A)

[0317] Other mooring means can also be composed of a float tied with a rope or the like from a weight or anchor dropped to the bottom. In this case, an attachment part for detachably attaching the wave power generation device to the float is provided. (Mooring means B)

[0318] Depending on the size of the waves at the mooring location, various countermeasures can be considered. When the waves are large or the wave period is long at a location, the rope connecting the wave power generation devices is connected by a connecting rope using a connector at the height approximately in the center of the wave power generation device. On the other hand, when the waves are small or the wave period is short at a location, it is also possible to connect the connectors at different heights of the wave power generation devices to each other using a connecting rope. For example, as shown in Fig. 32, the connector at the highest position of the wave power generation device and the connector at the lowest position of the adjacent wave power generation device are connected by a detachable connecting rope. By interconnecting the wave power generation devices with connectors at different heights in this way, under predetermined wave conditions, the oscillation of the wave power generation devices can be increased and the power generation efficiency can be improved.

[0319] In addition, if a wind power generation function by a wind receiving member as an oscillation strengthening means or a solar power generation function by sunlight is additionally installed in the wave power generation device used in the floating mooring type multiple wave power generation device assembly, a power generation device capable of performing power generation by two or three types of natural energies in combination with the wave power generation function by waves can be provided, and power generation can be provided more stably.

[0320] Both an internal power storage type wave power generation device and a power extraction type wave power generation device can be used in the floating mooring type wave power generation device assembly.

[0321] When the charging of the secondary battery in the moored internal battery-type wave power generation device reaches a predetermined amount, the electric boat heads towards the mooring location to recover or replace the wave power generation device assembly. The (4) charge / discharge and control management unit of the control system in the wave power generation device assembly system monitors the charging state of the secondary battery. When it detects that the charge amount has reached a predetermined level, it notifies the management center on land or on the ship to that effect via the (3) communication control unit. As a result, the management center sends the electric boat to the location where the wave power generation device assembly is moored, for the recovery or replacement of the wave power generation device assembly.

[0322] (4) A wave power generation device assembly system that supplies the power generated by a plurality of wave power generation devices to a secondary battery on land or a power transmission network via a power transmission cable Figures 36A, 36B, and 37 show a wave power generation device assembly system composed of a plurality of power extraction type wave power generation devices. A plurality of wave power generation devices are detachably moored with ropes having swiveled carabiners as mooring means to construct a wave power generation device assembly system. When the water level fluctuates due to the ebb and flow of the tide or the like, the float of the mooring means moves up and down in conjunction with the water level and floats on the water surface.

[0323] The power generated by the power generation mechanism of each wave power generation device is taken out from inside each wave power generation device by a waterproof cable connector, which is an example of power extraction means, or a waterproof conductive cable, and stored in secondary battery means installed on land or on a floating body, or sent to a power transmission network on land. One end of the waterproof conductive cable is connected to the power generation means of each wave power generation device, and the other end is connected to a waterproof cable connector, which is an example of power extraction means. Power is taken out by the waterproof conductive cable connected to the waterproof cable connector outside the housing of the wave power generation device and connected to one end of the waterproof conductive cable passing through the water. The other end of the waterproof conductive cable passing through the water is connected to secondary battery means installed on land or a power transmission network on land.

[0324] In a wave power generation device assembly of a plurality of power extraction type wave power generation devices, they are interconnected by a rope which is a connecting means for connecting between the wave power generation devices and a waterproof conductive cable which is a power transmission means between the wave power generation devices. In this case, the length of the connecting means and the length of the power transmission means may be approximately the same, or the connecting means may be longer, or the connecting means may be shorter. When the connecting means has higher strength than the power transmission means, it is desirable to make the power transmission means longer than the connecting means. This relationship between the lengths of the connecting means and the power transmission means is the same in the embodiments regarding all wave power generation device assemblies of a plurality of power extraction type wave power generation devices.

[0325] In addition, in a wave power generation device assembly that uses a wave power generation device to supply the power generated by the wave power generation device to a secondary battery on land or a power transmission network via a power transmission cable, if a wind power generation function by a wind receiving member or a solar power generation function by sunlight is additionally installed in the wave power generation device, it is possible to provide a power generation device that performs power generation by two or three types of natural energies in combination with the wave power generation function by waves, and it is possible to provide a power generation device that performs power generation more stably.

[0326] It is desirable to provide light emitting means having colors such as red and yellow to each wave power generation device and mooring means in order to avoid collision with other ships.

[0327] (5) A wave power generation device assembly system that stores the power generated by a plurality of wave power generation devices in a power storage means (secondary battery) on a float FIG. 38 shows a wave power device assembly system in which a wave power generation device assembly composed of a plurality of power extraction type wave power generation devices is moored to a mooring means, and the power generated by each power extraction type wave power generation device is stored in a power storage means provided on a float.

[0328] A plurality of wave power generation devices are detachably moored by a rope having a swiveled carabiner to the mooring means to construct a wave power generation device assembly system. When the water level fluctuates due to the rise and fall of the tide or the like, the float of the mooring means moves up and down in conjunction with the water level and floats on the water surface. A secondary battery, which is a power storage means having a sufficient power storage capacity to store the power generated by a plurality of wave power generation devices on this float, is detachably installed. The power generated by the power generation means of each wave power generation device is drawn out from inside the wave power generation device by a waterproof conductive cable and stored in a secondary battery means, which is a power storage means installed on the float. The secondary battery on the float has a waterproof structure. It is desirable that the connection and disconnection between each wave power generation device and the secondary battery on the float by the waterproof conductive cable can be performed by hot swap or cold swap.

[0329] In addition, if a wind power generation function by a wind receiving member or a solar power generation function by sunlight is additionally installed in the wave power generation device used in the wave power generation device assembly system that stores the power generated by the wave power generation device in the secondary battery on the float, it is possible to provide a power generation device that performs power generation by two or three types of natural energy in combination with the wave power generation function by waves, and it is possible to provide a power generation device that performs power generation more stably.

[0330] When the charging of the secondary battery on the float reaches a predetermined amount, the electric boat heads to the mooring location to recover or replace the secondary battery on the float. The (4) charge and discharge control management unit of the control system in the wave power generation device assembly system monitors the charging state of the secondary battery on the float, and when it detects that the charge amount has reached a predetermined level, it notifies the management center on land or on the ship to that effect via the (3) communication control unit. As a result, the management center sends the electric boat to the location where the wave power generation device assembly is moored to recover the wave power generation device assembly.

[0331] It is desirable to provide light emitting means having colors such as red and yellow on each wave power generation device and mooring means to avoid collision with other ships.

[0332] (6) Wave power generation device assembly system having a floating body energy storage device FIG. 39 shows a wave power generation device assembly system comprising a wave power generation device assembly consisting of a plurality of power extraction type wave power generation devices and a floating body energy storage device.

[0333] In the above-described wave power generation device assembly system, the power generated by each wave power generation device was stored in a secondary battery detachably provided on the float. Instead of the storage battery provided on this float, a floating body energy storage device provided with a power storage means such as a secondary battery is constructed on a floating body formed by removing the power generation means from inside the housing of the wave power generation device. A waterproof cable connector, which is a power extraction means, is provided on the floating body energy storage device housing, and the waterproof cable connector and the power storage means provided inside the floating body energy storage device housing are connected by a waterproof conductive cable. As the waterproof cable connector provided on the floating body energy storage device, a waterproof cable connector without a backflow prevention means is used. Also, the outer terminal of the waterproof cable connector provided on the floating body energy storage device housing and the outer terminal of the waterproof cable connector of the power extraction type wave power generation device are detachably connected directly or indirectly by a waterproof conductive cable. When connecting indirectly, the power extraction type wave power generation device and the floating body energy storage device are electrically connected via connection relay means existing between the power extraction type wave power generation device assembly and the floating body energy storage device.

[0334] As a result, the power generated by the power extraction type wave power generation device or the power extraction type wave power generation device assembly can be stored in the power storage means inside the floating body energy storage device housing.

[0335] Note that the shape of the floating body may be the one illustrated in FIG. 20, or may be other shapes (for example, ship shape).

[0336] One or any number of floating body power storage devices having power storage means inside are detachably moored to mooring means. The connection between the power extraction type wave power generator and the floating body power storage device by a waterproof conductive cable may be a direct connection or an indirect connection. In the case of an indirect connection, the waterproof conductive cable from the power extraction type wave power generator is detachably connected to a connection relay which is a connection relay means, and the waterproof conductive cable from the floating body power storage device is detachably connected to this connection relay to realize a detachable electrical connection between the power extraction type wave power generator and the floating body power storage device.

[0337] The configuration on the side of each power extraction type wave power generator is the same as that of the above-described embodiment (5). For example, it is desirable that the connection and disconnection between each wave power generator and the floating body power storage device by a waterproof conductive cable can be performed by hot swapping which can be detached even in an energized state or cold swapping which is performed in a power-off state.

[0338] The secondary battery which is the power storage means may be installed on the floating body housing or inside the floating body housing. For example, a secondary battery which is the power storage means can be provided inside the same housing as the wave power generator. If the power generation means is removed from inside the housing of the wave power generator to construct a floating body power storage device, a sufficiently large secondary battery which is the power storage means can be installed in a waterproof state. The housings of the floating body power storage device and the wave power generator can also be configured with the same shape, the same size, and the same material. It is desirable to apply identification information for identifying each or a specific coloring that can be identified to the housing of the floating body power storage device and the wave power generator.

[0339] In addition, if a wind power generation function by a wind receiving member or a solar power generation function by sunlight is additionally installed in the wave power generator used in the wave power generator assembly system having a floating body power storage device, a power generation device that performs power generation by two or three types of natural energy in combination with the wave power generation function by waves can be provided, and a power generation device that performs power generation more stably can be provided.

[0340] Furthermore, it is even better to install the aforementioned solar power generation means on the floating body power storage device so that it can be stored in the power storage means in the floating body power storage device.

[0341] Also, if the same control system as that of the wave power generation device is installed in the floating body power storage device, almost the same control as that of the wave power generation device can also be implemented in the floating body battery unit. For example, if the (4) charge and discharge control management unit of the control system in the floating body power storage device monitors the charging state of the secondary battery in the floating body secondary battery unit and detects that the charge amount has reached a predetermined level, it notifies the management center on land or on the ship from the floating body secondary battery unit to that effect via the (3) communication control unit. As a result, the management center can direct the electric ship to the location where the wave power generation device assembly is moored for the recovery and replacement of the floating body power storage device.

[0342] (7) Multiple wave power generation device assembly system with self-mobile floating body power storage device Fig. 40 shows a wave power generation device assembly system having a self-mobile floating body power storage device. Here, the wave power generation device assembly floating body is an assembly of power extraction type wave power generation devices. As a self-propelling means for the floating body power storage device, an electric motor and a screw driven by this electric motor can be provided, or the aforementioned water jet engine can be provided to construct a self-mobile floating body power storage device having self-propelling means. Since the floating body power storage device has the same control system as the control system built into the wave power generation device, self-propelled movement control is possible using the (1) overall control unit, (2) artificial intelligence unit, (3) communication control unit, etc.

[0343] Furthermore, if connection means that can be remotely controlled to connect and disconnect are provided on the connection relay means provided on the float of the mooring means, the self-mobile floating power storage device can be remotely controlled to connect and disconnect from the connection relay means of a plurality of wave power generation collective systems that are moored. When a predetermined amount of power storage is performed in the power storage means in the self-mobile floating power storage device connected to a plurality of moored wave power generation collective systems, the connection of the self-mobile floating power storage device to the connection relay means is released, and it moves toward a land base or a ship. On the other hand, another self-mobile floating power storage device having power storage means capable of power storage moves autonomously to the wave power generation device assembly system, connects to the connection relay means, and stores the power generated by the wave power generation device in the power storage means in the self-mobile floating power storage device.

[0344] In addition, if a wind power generation function by a wind receiving member or a solar power generation function by sunlight is additionally installed in the wave power generation device used in the wave power generation device assembly system having a self-mobile floating power storage device, it is possible to provide a power generation device that performs power generation by two or three types of natural energy in combination with the wave power generation function by waves, and it is possible to provide a power generation device that performs power generation more stably. Furthermore, it is better to install the above-mentioned solar power generation means in the self-mobile floating power storage device so that it can be stored in the power storage means in the floating power storage device.

[0345] This wave power generation device assembly system having a floating power storage device can accumulate and recover the electrical energy generated by a plurality of wave power generation devices in a single or a plurality of floating power storage devices, so the recovery efficiency of the electrical energy generated by a plurality of wave power generation devices can be dramatically improved.

[0346] This wave power generation device assembly system having a floating power storage device can be used alone, but it can also be arranged and operated by combining a plurality of sets of wave power generation device assembly systems having floating power storage devices.

[0347] (8) Self-mobile wave power generation device assembly Figures 41A and 41B show a self - movable wave power generation device assembly system. Figure 41A shows a self - movable wave power generation assembly system that combines an internal power storage type wave power generation device assembly and a wave power generation device having moving means. Figure 41B shows a self - movable wave power generation assembly system that combines a power extraction type wave power generation device assembly and a wave power generation device having moving means, and a floating body power storage device having moving means.

[0348] If one or more arbitrary numbers of moving means are provided for a wave power generation device assembly composed of a plurality of wave power generation devices, a self - movable wave power generation device assembly can be constructed.

[0349] An example of the moving means is an aerial drone or an underwater drone. If an aerial drone or an underwater drone is detachably connected to a wave power generation device assembly composed of a plurality of wave power generation devices by a connecting rope, the wave power generation device assembly can move.

[0350] If the propulsion electric motor provided in the aerial drone or the underwater drone is connected to the secondary battery in the wave power generation device to be towed by a waterproof conductive cable, it can move semi - permanently. This is because even if the power stored in the secondary battery in the wave power generation device is exhausted as a result of movement, after a predetermined time has elapsed, power will be stored in the secondary battery in the wave power generation device by wave power generation.

[0351] Another example of the moving means is a self - movable wave power generation device incorporating a screw and an electric motor for driving the screw. As another example, there is a wave power generation device having a water jet engine mechanism. The self - movable wave power generation device having this water jet engine mechanism obtains propulsion force by discharging the water pumped up from underwater through a rear jet port with great force using an electric high - pressure pump as a power source.

[0352] Replacing any one or more of the plurality of wave power generation devices in a wave power generation device assembly with self - movable wave power generation devices can construct a self - movable wave power generation device assembly system.

[0353] For example, it is desirable to make the wave power generation devices at both ends of a wave power generation device assembly system in which a plurality of wave power generation devices are connected by a connecting rope into self - movable wave power generation devices. Such a wave power generation device assembly system has the following merits: · Since there are a plurality of self - movable wave power generation devices, while one is moving, the other can be charged. If they alternate in taking on the movement, the continuous cruising distance can extend to approximately infinity. · Since there are self - movable wave power generation devices at both ends, the direction can be quickly changed. When changing the traveling direction by 180 degrees, it can be done instantaneously by switching the wave power generation device responsible for the movement. This is an important function for avoiding collisions with other ships. · Since there are a plurality of self - movable wave power generation devices, even if one fails, it can continue to move. · Since there are a plurality of self - movable wave power generation devices, even if the connecting rope breaks and it is divided into two groups, each group can move to a predetermined position with the self - movable wave power generation devices.

[0354] Note that the types of self - movable wave power generation devices may be the same or different. Also, all the wave power generation devices constituting the wave power generation device assembly system may be self - movable wave power generation devices.

[0355] Also, the electric power generated by the power generation means of each wave power generation device can be drawn out from inside each wave power generation device by a waterproof conductive cable and stored in the power storage means in the floating body power storage device. In this case, one end of the waterproof conductive cable is connected to the power generation mechanism of each wave power generation device, and the other end of the waterproof conductive cable is connected to the power storage means in the floating body power storage device.

[0356] This floating body power storage device may be a self - movable type floating body power storage device having self - propelling means, or a floating body power storage device having solar power generation means.

[0357] Next, an example of an offshore power station will be described.

[0358] (1) An offshore power station in which a wave power generator assembly system is moored in parallel FIG. 42A shows a parallel mooring arrangement of a wave power generator assembly in which a wave power generator assembly system composed of a predetermined number of wave power generators is arranged in parallel and moored. The mooring means detachably attaches and arranges the wave power generator assembly. The wave power generators of the wave power generator assembly may be internal power storage type wave power generators or power extraction type wave power generators.

[0359] In the case of a power extraction type wave power generator, a floating body power storage device is also connected to the wave power generator assembly system as shown in the middle part of FIG. 42A. When the power storage in the power storage means built in this floating body power storage device exceeds a predetermined amount, the floating body power storage device is removed from the mooring means and recovered by a ship or the like, or the power is transferred to the power storage means placed on the ship. When a ship or the like heads for recovering the floating body power storage device, it is desirable to tow or carry a replacement floating body power storage device on board.

[0360] Also, in the case of a power extraction type wave power generator, power can be transmitted from the wave power generator assembly system to an onshore facility via a submarine power cable as shown in the lower part of FIG. 42A. In this case, the transmitted power is stored in the power storage means installed on land or transmitted to the power grid.

[0361] If a wind power generation function by a wind receiving member or a solar power generation function by sunlight is additionally installed in the wave power generator used for the parallel mooring of the wave power generator assembly system, it is possible to provide a power generation device that performs power generation by two or three types of natural energies in combination with the wave power generation function by waves, and it is possible to provide a power generation device that performs power generation more stably. Also, it is desirable to provide a light emitting means having a warning color such as red or yellow to each wave power generator and mooring means to avoid collision with other ships.

[0362] (2) Offshore power station with continuous mooring of a wave power generation device assembly Figure 42B shows an offshore power station with multiple stages of continuous mooring of a wave power generation device assembly in which the mooring of a plurality of wave power generation device assemblies composed of a predetermined number of wave power generation devices is continuously arranged. The mooring means detachably attaches and arranges one or more wave power generation device assemblies. The wave power generation devices constituting the wave power generation device assembly may be internal energy storage type wave power generation devices or power extraction type wave power generation devices.

[0363] In the case of a power extraction type wave power generation device, a floating body energy storage device is also connected to the wave power generation device assembly, like the wave power generation device assembly system shown in the upper two stages of Figure 42B. When the power storage in the power storage means built into this floating body energy storage device exceeds a predetermined amount, the floating body energy storage device is removed from the mooring means and recovered by a ship or the like, or the power is transferred to the power storage means placed on the ship. When a ship or the like heads for recovering the floating body energy storage device, it is desirable to tow and carry an exchangeable floating body energy storage device.

[0364] Also, in the case of a power extraction type wave power generation device, although not shown in Figure 42B, as shown in the lower part of Figure 42A, power can also be transmitted from the wave power generation device assembly to an onshore facility via an underwater power transmission cable. In this case, the transmitted power is stored in the power storage means installed onshore or transmitted to the power transmission network.

[0365] Some mooring means can also moor a plurality of wave power generation device assemblies.

[0366] For a wave power generation device used in an offshore power station where the mooring of a wave power generation device assembly is continuously arranged, if a wind power generation function by a wind receiving member and a solar power generation function by sunlight are additionally installed, it is possible to provide a power generation device that performs power generation by two or three types of natural energy in combination with the wave power generation function by waves, and the power generation can be performed more stably. In addition, it is desirable to provide a light emitting means having a warning color such as red or yellow to each wave power generation device and mooring means to avoid collision with other ships.

[0367] (3) Drifting type offshore (ocean) power station For example, in an environment where one wave power generation device with a diameter of 4 m, a power generation efficiency of 30%, and a power generation capacity of 10 kWh operates for an average of 15 hours a day, when wave power generation is performed, a power generation amount of 150 kW (equivalent to the power consumption of 10 ordinary households) can be realized in one day.

[0368] A predetermined number of these wave power generation devices can be detachably connected by the above-mentioned connecting means to form and operate an assembly of wave power generation devices. For example, 100 wave power generation devices with a diameter of 4 m are detachably connected at 10 m intervals by the above-mentioned connecting means. Then, if an assembly consisting of these 100 wave power generation devices is detachably connected in 100 rows at 10 m intervals, an assembly of 10,000 wave power generation devices can be formed. For an offshore power station (with an area of 1 km × 1 km) consisting of this assembly of 10,000 wave power generation devices, if the power generation of each wave power generation device per day is 150 kW, the total will be 1.5 million kW, exceeding the power generation capacity of one nuclear power plant. Since the surrounding sea area of Japan is about 4.5 million square kilometers, it is also possible to connect about 100 assemblies of 10,000 wave power generation devices to construct an offshore power station (with an area of 10 km × 10 km) consisting of an assembly of 1 million wave power generation devices.

[0369] Figure 43A shows a floating type offshore power station. The wave power generation devices that make up the wave power generation device assembly may be internal energy storage type wave power generation devices or power extraction type wave power generation devices. In the case of a power extraction type wave power generation device, it is desirable to connect a floating energy storage device to the wave power generation device assembly as in the wave power generation device assembly system shown in Figure 43A.

[0370] Wave power generation can be carried out while drifting a wave power generation device assembly composed of a predetermined number of wave power generation devices or an offshore power station of a scale of 10,000 units. Alternatively, wave power generation can also be carried out while towing an offshore power station with a ship. Wave power generation can be performed while drifting for a predetermined period, and when the position has shifted by more than a predetermined distance, it can also be towed by a ship to move to a predetermined position for wave power generation.

[0371] A wave power generation device assembly composed of a predetermined number of wave power generation devices or an offshore power station of a scale of 10,000 units has a high risk of collision with other ships or airplanes, so it is desirable to provide a collision prevention function for notifying the presence of the wave power generation device. As the collision prevention function, the one described as "wave power generation device with collision prevention function (reflective member and light emitting means)" in Figure 28F can be used.

[0372] In addition, in order to improve the power generation efficiency, it is desirable to install a solar power generation means in the wave power generation device. All the technical configurations described in the "wave power generation device with solar power generation means" can be used for the solar power generation means.

[0373] If a wind power generation function by a wind receiving member or a solar power generation means by sunlight is additionally installed in the wave power generation device used in an offshore (offshore) power station (floating type), a power generation device that performs power generation by two or three types of natural energies in combination with the wave power generation function by waves can be provided, and power generation can be performed more stably.

[0374] (4) Mooring type offshore (offshore) power station FIG. 43B shows a moored offshore (ocean) power station. The wave power generation devices that make up the wave power generation device assembly may be internal storage type wave power generation devices or power extraction type wave power generation devices. In the case of a power extraction type wave power generation device, like the wave power generation device assembly system shown in FIG. 43B, a floating body energy storage device is connected to each set of a predetermined number of wave power generation device assemblies, and the power generated by each power extraction type wave power generation device is stored in the floating body energy storage device. When the power storage in the power storage means built into this floating body energy storage device exceeds a predetermined amount, the floating body energy storage device is removed from the mooring means and recovered by a ship or the like, or power is transferred from the power storage means of the floating body energy storage device to the power storage means placed on the ship. When a ship or the like is going to recover the floating body energy storage device, it is desirable to tow and carry an exchangeable floating body energy storage device.

[0375] Also, in the case of a power extraction type wave power generation device, although not shown in FIG. 43B, power can also be transmitted from the wave power generation device assembly to an onshore facil...

Claims

1. a floating body part floating on a fluid surface; a rotating part that rotates around the axis of a power generation rotating shaft part supported by the floating body part; a wave power generation device comprising a power generation part that generates power by the rotation around the axis of the power generation rotating shaft part in the rotating part, wherein the floating body part is configured to be rotatable around the axis of an eccentric rotating shaft part passing through a position horizontally eccentric with respect to the center of buoyancy of the floating body part, and the wave power generation device is characterized by comprising a suppression part that suppresses the vertical movement of the eccentric rotating shaft part when the vertical movement of the floating body part occurs due to the vertical movement of the fluid surface.

2. In the wave power generation device according to Claim 1, the power generation rotating shaft part is provided coaxially with the eccentric rotating shaft part, and the rotating part is configured integrally with the floating body part.

3. In the wave power generation device according to Claim 2, the shape of the floating body part is rotationally symmetric with respect to a central axis parallel to the axis of the eccentric rotating shaft part.

4. In the wave power generation device according to Claim 3, a weight part is provided on the side opposite to the eccentric rotating shaft part with respect to the central axis.

5. In the wave power generation device according to Claim 4, the weight part includes at least a part of the power generation part.

6. In the wave power generation device according to any one of Claims 1 to 5, the suppression part is disposed in the fluid below the floating body part and includes a fluid resistance part that generates fluid resistance against at least one of the height changes in the upper and lower directions.

7. In the wave power generation device according to any one of Claims 1 to 5, the suppression part is disposed above the floating body part and includes a weight member that suppresses the upward height change of the eccentric rotating shaft part, and the bottom shape of the weight member is tapered downward.

8. In the wave power generation device according to any one of Claims 1 to 5, the power generation part includes an input shaft that repeats forward and reverse rotations by the pendulum motion of the rotating part around the axis of the power generation rotating shaft part, one input bevel gear provided on the input shaft, an output shaft extending in a direction orthogonal to the axial direction of the input shaft, and a pair of output bevel gears provided on the output shaft and facing each other. A rotational transmission mechanism including a one-way rotational transmission portion provided between each of the pair of output bevel gears and the output shaft. The rotational transmission mechanism is configured such that the input bevel gear meshes with all of the pair of output bevel gears. When the input shaft rotates forward, one of the pair of output bevel gears rotates the output shaft in a specified direction via the one-way rotational transmission portion while the other output bevel gear idles. When the input shaft rotates in reverse, the other output bevel gear rotates the output shaft in the specified direction via the one-way rotational transmission portion while the one output bevel gear idles. A wave power generation device characterized by this.

9. In the wave power generation device according to Claim 8, The rotational transmission mechanism has a flywheel on the output shaft or on the downstream side in the rotational transmission direction from the output shaft. A wave power generation device characterized by this.

10. A wave power generation system including a plurality of wave power generation devices, The wave power generation device is the wave power generation device according to any one of Claims 1 to 5, The eccentric rotary shaft portions in the plurality of wave power generation devices are supported so that a predetermined positional relationship is maintained, and a support connecting member that connects the plurality of wave power generation devices to each other is provided. The support connecting member functions as the suppression portion in the plurality of wave power generation devices. A wave power generation system characterized by this.

11. In the wave power generation system according to Claim 10, The plurality of wave power generation devices include two or more wave power generation devices having different shapes or dimensions of the floating body portions. A wave power generation system characterized by this.

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