Wave energy efficient conversion device based on dynamic fixed-point wave concentration and control method

Abstract

The application belongs to the technical field of wave energy power generation control, and provides a wave energy efficient conversion device and control method based on dynamic fixed-point wave focusing. The efficient conversion device comprises a first reflected wave adjusting structure, a second reflected wave adjusting structure and a rotary driving unit. The first reflected wave adjusting structure and the second reflected wave adjusting structure can independently rotate around their respective rotary shafts with a fixed radial distance from the fixed-point position to independently adjust the direction of the generated reflected wave, so that the fixed-point position is in the constructive interference area of the incident wave and the reflected wave. The rotary driving unit is used for driving the first reflected wave adjusting structure and the second reflected wave adjusting structure to independently rotate. The efficient conversion device and control method provided by the application can dynamically adjust the reflection angle of the two reflected waves, so that the fixed-point position is always in the constructive interference area of the wave, and the efficient conversion of wave energy in various sea conditions is realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wave energy power generation control, and particularly provides a wave energy efficient conversion device and control method based on dynamic fixed-point wave focusing. BACKGROUND

[0002] The float oscillation type wave energy power generation system is a system for converting the kinetic energy of ocean waves into electric energy. The system captures the up-and-down movement of sea waves through a float arranged in the sea surface or seawater, converts the sea wave movement into mechanical movement by a power take-off (PTO) unit, and then outputs electric energy through a generator. In addition, the wave energy conversion device generally includes a control unit that can adjust the stiffness, damping and other parameters of the PTO according to real-time acquired sea state information such as incident wave frequency and amplitude, so as to ensure efficient energy conversion and safe operation of the equipment. Due to the high energy density and strong reliability of wave energy, and the theoretical reserves far exceeding global energy demand, the development value is outstanding. By focusing the incident wave in a specific area, the wave energy density can be significantly increased, which is beneficial to improve the wave energy power generation power and reduce the wave energy power generation cost. In order to improve the wave energy collection efficiency, a wave energy conversion device (or wave focusing device) can be arranged in the wave energy power generation system. The wave energy conversion device cooperates with the float to guide the incident wave to the specific area where the float is located through a specific wave focusing structure, so as to increase the wave energy density and enhance the energy capturing capacity of the float.

[0003] At present, there are many wave focusing structures proposed. For example, in the wave energy focusing power generation device disclosed in Chinese invention patent CN109707555A, an arc-shaped wall for focusing energy is arranged, and the float of the power generation device is arranged at the center of the arc-shaped wall. When the wave is incident in a direction parallel to the line connecting the center and the midpoint of the arc-shaped wall, the arc-shaped wall has the maximum effective reflection area. If the wavelength of the incident wave is in a specific range at this time, the incident wave and the reflected wave will superimpose at the position of the float, so that the wave energy is focused in the area where the float is located.

[0004] Obviously, when the incident direction of the wave changes, the effective reflection area of the arc-shaped wall will decrease. In addition, even if the incident direction of the wave is relatively suitable, the areas where the incident-reflection superposition of waves of different wavelengths is strengthened are different. Therefore, to ensure the energy focusing effect at the position of the float, firstly, the orientation of the arc-shaped wall and the horizontal position of the float need to be changed according to the sea conditions, so that the opening of the arc-shaped wall is always directed to the incoming direction of the incident wave, and the line connecting the float and the midpoint of the arc-shaped wall is parallel to the incoming direction of the incident wave. In addition, the distance of the float from the midpoint of the arc-shaped wall needs to be changed according to the wavelength of the wave, so that it is in the energy focusing area corresponding to the specific wavelength.

[0005] However, for medium and large scale float oscillation type wave energy generation systems, the size and weight of the float are extremely large (e.g. up to 10-10 2 tons), if the float horizontal position movable scheme is adopted, large float horizontal motion driving mechanism such as propeller, positioning system, etc. needs to be additionally increased, the mechanical structure and operation of the system will become more complex, and the horizontal movable structure will have a decreased anti-overturning ability in extreme sea conditions, resulting in a sharp increase in construction and maintenance costs. Therefore, the current mainstream medium and large scale point absorption type wave energy generation devices, such as Ocean Power Technologies system, Carnegie CETO underwater float system, etc., all adopt single point mooring or one end inserted into the seabed fixed guide rail, slide rod, to limit the float to only do single degree of freedom vertical movement. Obviously, in this setting, the existing various types of wave energy gathering structures cannot ensure that the energy gathering area is located at the fixed position of the medium and large scale float when the wave incidence direction and wavelength change. SUMMARY

[0006] The first aspect of the present application provides a wave energy efficient conversion device based on dynamic fixed point wave focusing, comprising a first reflected wave adjusting structure, a second reflected wave adjusting structure and a rotary drive unit;

[0007] The first reflected wave adjusting structure and the second reflected wave adjusting structure can independently rotate around their respective rotation axes with a constant radial distance from the fixed point position, to independently adjust the direction of the reflected wave, so that the fixed point is located in the constructive interference area of the incident wave and the reflected wave;

[0008] The rotary drive unit is used to drive the first reflected wave adjusting structure and the second reflected wave adjusting structure to rotate independently.

[0009] Further, the first reflected wave adjusting structure has a first reflecting surface for reflecting the incident wave, and the second reflected wave adjusting structure has a second reflecting surface for reflecting the incident wave;

[0010] The rotation axis of the first reflected wave adjusting structure and the rotation axis of the second reflected wave adjusting structure are perpendicular to the sea level.

[0011] Optionally, the first reflected wave adjusting structure and the second reflected wave adjusting structure have the same rotation axis or different rotation axes;

[0012] When the first reflected wave adjusting structure and the second reflected wave adjusting structure have the same rotation axis, the projection line of the first reflecting surface on the sea level and the projection line of the second reflecting surface on the sea level are located on both sides of the connecting line of the fixed point position and the projection position of the rotation axis of the two reflected wave adjusting structures on the sea level;

[0013] When the first and second reflective wave adjusting structures have different rotation axes, a perpendicular line is drawn from the fixed point position to the line connecting the projections of the respective rotation axes of the two reflective wave adjusting structures on the sea level, and the projection line of the first reflective surface on the sea level and the projection line of the second reflective surface on the sea level are located on the two sides of the perpendicular line.

[0014] Optionally, the first reflective surface and the second reflective surface are planar or arc-shaped.

[0015] Preferably, the radial length of the first reflective surface is not less than the radial distance between the rotation axis of the first reflective wave adjusting structure and the fixed point position.

[0016] The radial length of the second reflective surface is not less than the radial distance between the rotation axis of the second reflective wave adjusting structure and the fixed point position.

[0017] Preferably, the height of the first reflective surface above the sea level and the height of the first reflective surface below the sea level are both greater than or equal to 1 / 2 of the maximum wave amplitude of the wave in the deployment area.

[0018] The height of the second reflective surface above the sea level and the height of the second reflective surface below the sea level are both greater than or equal to 1 / 2 of the maximum wave amplitude of the wave in the deployment area.

[0019] Optionally, the rotation driving unit comprises a first hydraulic transmission mechanism and a second hydraulic transmission mechanism.

[0020] The first hydraulic transmission mechanism adjusts the angle of rotation of the first reflective wave adjusting structure around the rotation axis by adjusting the length of the telescopic hydraulic rod thereof.

[0021] The second hydraulic transmission mechanism adjusts the angle of rotation of the second reflective wave adjusting structure around the rotation axis by adjusting the length of the telescopic hydraulic rod thereof.

[0022] The second aspect of the present application provides a control method for controlling the wave energy efficient conversion device based on dynamic fixed-point wave focusing as described above, comprising the following steps:

[0023] S1, obtaining the incident angle and wavelength of the incident wave;

[0024] S2, searching for each group of two-dimensional adjustment parameter combinations in a two-dimensional adjustment parameter search space under the known conditions of the incident angle and wavelength of the incident wave, obtaining a two-dimensional adjustment parameter combination that makes the wave energy focusing effect of the fixed point position reach the maximum value under the known conditions as the optimal two-dimensional adjustment parameter combination, wherein the two-dimensional adjustment parameter combination comprises a first adjustment parameter and a second adjustment parameter.

[0025] S3, adjusting the first and second reflective wave adjusting structures based on the optimal two-dimensional adjustment parameter combination.

[0026] Preferably, the control method further comprises the following steps:

[0027] S4, statistics of the optimal two-dimensional adjustment parameter combination under multiple groups of incident angles and wavelength combinations, and establishing a control strategy of the wave energy efficient conversion device based on dynamic fixed-point wave focusing based on the statistical results.

[0028] Optionally, the control strategy is a two-dimensional adjustment parameter table, or a function expression of the optimal adjustment parameter with the incident angle and wavelength of the incident wave as independent variables.

[0029] Preferably, the first adjustment parameter is a first rotation angle of the first reflected wave adjustment structure , the second adjustment parameter is a second rotation angle of the second reflected wave adjustment structure , and the function expression of the optimal adjustment parameter is:

[0030] ,

[0031] wherein, is the optimal value of , is the optimal value of ;

[0032] or,

[0033] the first adjustment parameter is an opening angle of a first reflecting surface of the first reflected wave adjustment structure and a second reflecting surface of the second reflected wave adjustment structure , the second adjustment parameter is an orientation angle of the first reflecting surface and the second reflecting surface , and the function expression of the optimal adjustment parameter is:

[0034] ,

[0035] wherein, is the optimal value of , is the optimal value of .

[0036] The embodiment of the present application provides a wave energy efficient conversion device based on dynamic fixed-point wave concentrating and a control method, which has a first reflected wave adjusting structure and a second reflected wave adjusting structure capable of rotating around a rotating shaft independently, can independently adjust the angle of reflected waves caused by the two reflecting plates according to the incident angle and wavelength (or frequency) of incident waves, and can realize wave concentrating and energy concentrating effects at the fixed-point position of a floater of a wave energy power generation device in different sea states through the double-side dynamic adjusting mode, breaks the wave concentrating limitation of a traditional single energy concentrating structure, realizes full coverage adaptation to a wide range of incident angle-wavelength sea states, and realizes the effect of adjusting a constructive interference area (wave energy concentrating area) of waves with any incident wave angle and wavelength to a preset fixed-point position. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 A working principle schematic diagram of a wave speed strengthening type wave concentrating structure;

[0038] Figure 2 A schematic diagram of a wave concentrating structure in an existing wave concentrating structure in a sea state causing a relatively strong wave amplitude strengthening effect at the position of a floater;

[0039] Figure 3 A schematic diagram of a wave concentrating structure in an existing wave concentrating structure in a sea state causing a relatively strong wave amplitude strengthening effect at the position of a floater; Figure 2

[0040] A schematic diagram of a wave concentrating structure in an existing wave concentrating structure in a sea state causing a relatively strong wave amplitude strengthening effect at the position of a floater; Figure 4 Figure 2 A schematic diagram of a wave concentrating structure in an existing wave concentrating structure in a sea state causing a relatively strong wave amplitude strengthening effect at the position of a floater;

[0041] Figure 5 Figure 2 A schematic diagram of a wave concentrating structure in an existing wave concentrating structure in a sea state causing a relatively strong wave amplitude strengthening effect at the position of a floater;

[0042] Figure 6 A structure and layout schematic diagram of a wave energy efficient conversion device based on dynamic fixed-point wave concentrating provided by the embodiment of the present application;

[0043] Figure 7 A schematic diagram of a wave concentrating structure in an existing wave concentrating structure in a sea state causing a relatively strong wave amplitude strengthening effect at the position of a floater; Figure 6

[0044] Figure 8 A schematic diagram of a wave concentrating structure in an existing wave concentrating structure in a sea state causing a relatively strong wave amplitude strengthening effect at the position of a floater; Figure 6

[0045] A front view of a wave energy efficient conversion device based on dynamic fixed-point wave concentrating provided by the embodiment of the present application; Figure 9

[0046] Figure 10 ​​​​A top view of the wave energy high-efficiency conversion device based on dynamic fixed-point wave focusing according to an embodiment of the present application;

[0047] Figure 11 A flow chart of the control method according to an embodiment of the present application;

[0048] Figure 12 A parameter definition diagram according to an embodiment of the present application;

[0049] Figure 13 A diagram of the opening angle, orientation setting and fixed-point energy focusing effect of the wave energy high-efficiency conversion device based on dynamic fixed-point wave focusing according to an embodiment of the present application in a specific sea state;

[0050] Figure 14 A diagram of the opening angle, orientation setting and fixed-point energy focusing effect of the wave energy high-efficiency conversion device based on dynamic fixed-point wave focusing according to an embodiment of the present application in another specific sea state;

[0051] Figure 15 A diagram of the opening angle, orientation setting and fixed-point energy focusing effect of the wave energy high-efficiency conversion device based on dynamic fixed-point wave focusing according to an embodiment of the present application in another specific sea state;

[0052] Figure 16 A flow chart of the control method according to some embodiments of the present application;

[0053] Figure 17 A top view of the reflected wave adjusting structure according to some embodiments of the present application;

[0054] Figure 18 A top view of the reflected wave adjusting structure according to some embodiments of the present application.

[0055] Reference numerals in the drawings

[0056] First reflecting plate 1, first reflecting surface 11, projection line 111 of first reflecting surface 11 on sea level 8, fixed seat 12, second reflecting plate 2, second reflecting surface 21, projection line 211 of second reflecting surface 21 on sea level 8, rotating shaft 31, rotating shaft 321, rotating shaft 322, connecting line 33, median line 34, rotating driving unit 4, first hydraulic transmission mechanism 41, first end 411, second end 412, second hydraulic transmission mechanism 42, float 5, sliding rod 6, platform 7, base 71, sea level 8. DETAILED DESCRIPTION

[0057] Hereinafter, the present application is further described based on the preferred embodiments and with reference to the accompanying drawings.

[0058] In the description in the embodiments of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the embodiments of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, in the description of the present application, in order to distinguish different units, the first, second and the like are used in the specification, but these are not limited by the order of manufacture, and cannot be understood as indicating or implying relative importance, and the name may be different in the detailed description and claims of the present application. In addition, in order to facilitate understanding, the various components on the drawing are enlarged or reduced, but this practice is not intended to limit the scope of protection of the present application.

[0059] The words in the specification are used to illustrate the embodiments of the present application, but are not intended to limit the present application. It should be noted that unless otherwise explicitly specified and limited, if the terms "provided", "connected", "connected" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, can be directly connected, or indirectly connected through an intermediate medium, can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be specifically understood.

[0060] In order to clearly illustrate the improvement of the technical scheme of the present application over the prior art, first, the scheme of strengthening wave energy in various types of wave energy power generation systems is introduced.

[0061] The wave energy strengthening structure or wave concentrating structure is an additional structure in various types of energy conversion systems using wave energy to generate electricity, which functions to strengthen the wave energy of the incident wave, thereby strengthening the conversion efficiency of wave energy to electric energy. Since the working principles of different wave energy power generation systems are different, accordingly, the forms, setting methods and energy concentrating principles of the wave concentrating structure are also different.

[0062] The following Table 1 shows the application scenarios and wave energy strengthening principles of some existing wave concentrating structures.

[0063] Table 1 Introduction of some wave concentrating structures

[0064]

[0065] As shown in Table 1, the current wave energy generation system mainly includes: water turbine type, oscillating wing type power generation system using the flow impact force of sea waves and tidal currents, and float oscillation type wave energy generation system using the vertical oscillation of the float. In order to improve the power generation capacity of the above-mentioned various power generation systems, the wave concentrating structure is also correspondingly divided into wave speed strengthening type and wave amplitude strengthening type.

[0066] Among them, the wave speed strengthening type wave concentrating structure is as shown in Figure 1 Generally, two or more flat plates are used to form a flow guide channel, one end of which is wide as an inlet and the other end is narrow as an outlet. The inlet is directed to the flow direction, so that the sea current converges and accelerates in the channel, thereby improving the impact speed on the water turbine or oscillating wing to realize the improvement of power generation capacity. For example, the technical solutions disclosed in Chinese invention patent CN108518299A (a marine energy concentrating power generation device), Chinese invention patent CN107120224A (high-efficiency energy concentrating multi-unit multi-channel sea wave, tidal wave, ocean current and wind power generation system) and Chinese utility model patent CN221423339U (a steerable oscillating wing power generation device and an anchoring type oscillating wing power generation system) all can see the above-mentioned flow concentrating channel structure for realizing wave speed strengthening.

[0067] The wave amplitude strengthening type wave energy strengthening device is applied to the float oscillation type wave energy generation system. As introduced in the background, the float oscillation type power generation system uses the up and down oscillation of the float to capture the energy of the up and down fluctuation of the wave, and uses the PTO unit to convert the wave energy into mechanical energy and drive the generator to generate electricity. Correspondingly, the wave amplitude strengthening type wave energy strengthening device sets an arc-shaped or planar baffle on the wave propagation route to reflect the incident wave. Since the wave amplitude of the incident wave and the reflected wave is strengthened at the same phase, the oscillation amplitude of the float at the wave amplitude strengthening position will also be strengthened accordingly, thereby realizing the improvement of power generation capacity. For example, Chinese invention patent CN109707555A (a near-shore reflection type wave energy concentrating power generation device) discloses a wave energy concentrating arc-shaped wall, which can use the convergence of reflected waves to improve the oscillation amplitude of the float.

[0068] However, compared with the wave speed strengthening type flow concentrating channel, the wave amplitude strengthening type wave energy strengthening device is more restricted when it is set in cooperation with the float:

[0069] (1) Since the wave amplitude strengthening device uses the phase interference principle of reflected wave and incident wave, after setting an arc-shaped or planar reflection structure, the wave amplitude enhancement position (constructive interference) and the wave amplitude weakening area (destructive interference) will appear alternately in the interaction area of the incident wave and the reflected wave, and the position will change constantly with the change of the incident direction and the wavelength of the wave.

[0070] For example, like Figure 2The diagram shows a method that, through an energy-concentrating arc wall, can induce ideal constructive interference at the float position when the incident direction and wavelength of the incident wave are suitable, thereby significantly enhancing the wave amplitude and achieving a good energy-concentrating effect.

[0071] However, when the direction of the incident wave changes, if the orientation of the energy-concentrating arc wall does not change, then as... Figure 3 As shown, some of the incident wave is blocked outside the arc-shaped wall, resulting in a reduction in the reflected wave component and a weakening of the wave amplitude enhancement effect at the float's location. If the energy-concentrating arc-shaped wall is configured to change according to the direction of the incident wave, then when its direction is adjusted to face the direction of the incident wave, as shown... Figure 4 As shown, this will cause the position of the amplitude enhancement to change accordingly, so that the fixed float may actually be in the amplitude reduction region.

[0072] Besides the possibility that a change in the incident wave direction could lead to a poor energy-gathering effect of the energy-gathering arc wall at the stationary float, a change in wavelength (or frequency) could also reduce the energy-gathering effect of the energy-gathering arc wall, such as... Figure 5 As shown, in the direction of the incident wave and Figure 2 Under the same conditions, when the wavelength changes, the incident wave and the reflected wave may undergo destructive interference at the fixed-point float, causing the wave amplitude at the location of the fixed-point float to decrease.

[0073] (2) Although it is possible to make the float adjustable in a horizontal position, in Figure 4 and Figure 5 The above method achieves wave amplitude enhancement at the location of the float, but this method requires additional horizontal motion drive mechanisms for the float, such as propellers and positioning systems. The mechanical structure and operation of the system become more complex, and the anti-capsulation capability of the horizontally movable structure decreases under extreme sea conditions, leading to a surge in construction and maintenance costs. Therefore, the method of adjusting the horizontal position of the float to ensure that it is always in the wave amplitude enhancement area is generally used in small float oscillating wave energy power generation devices.

[0074] (3) For medium and large float oscillating wave energy generation systems set up near the shore or near large fixed offshore platforms, the size and weight of the floats are extremely large (e.g., reaching 10 to 10). 2 (At the ton level), to ensure the safe operation of the system, single-point mooring or limiting the horizontal movement of the buoy by inserting one end into a guide rail or sliding bar fixed on the seabed is generally used, ensuring that it only makes vertical oscillating motion at a fixed point on the horizontal plane (such as the currently mainstream Ocean Power Technologies system, Carnegie CETO underwater buoy system, etc.). Obviously, through Figures 2 to 5It can be seen that in this arrangement, the existing various wave energy enhancement structures cannot ensure that the wave amplitude enhancement region is located at the fixed position of the large and medium-sized floater when the wave incidence direction and wavelength change, that is, the existing various wave energy enhancement structures arranged for the fixed-point floater can only enhance the sea waves of certain specific direction and wavelength at the fixed-point position of the floater, which undoubtedly greatly limits the application of the equipment.

[0075] Therefore, for the fixed-point arrangement, only the floater that performs vertical oscillation relative to the sea level, if it is to improve the oscillation amplitude in various sea conditions, the wave concentrating structure needs to have the ability to adjust the constructive interference position of the incident wave and the reflected wave to the fixed-point position of the floater in various sea conditions.

[0076] To achieve the above-mentioned goal, the present application provides a wave energy efficient conversion device based on dynamic fixed-point wave concentration, which comprises a first reflected wave adjusting structure and a second reflected wave adjusting structure, both of which are used for reflecting the incident wave to generate reflected wave, and the first reflected wave adjusting structure and the second reflected wave adjusting structure can independently rotate around their respective rotation axes, therefore, the first reflected wave adjusting structure can independently adjust the direction of the reflected wave it generates, and the second reflected wave adjusting structure can also independently adjust the direction of the reflected wave it generates, so that the fixed-point position of the floater is located in the constructive interference region of the incident wave and the reflected wave.

[0077] Figure 6 The perspective structure and the layout schematic diagram of the conversion device according to some embodiments of the present application are shown, Figure 7 、 Figure 8 the circle I and the circle II in Figure 6 are shown in enlarged view, Figure 9 is a front view of the conversion device, Figure 10 is a top view of the conversion device, wherein, in order to facilitate the description of the technical solutions of the present application, the sea level 8 is taken as the XY plane, and the direction perpendicular to the sea level 8 is taken as the Z-axis direction.

[0078] As shown in Figures 6 to 10 , the first reflected wave adjusting structure is configured as a first reflecting plate 1 in the form of a flat plate, part of the first reflecting plate 1 is below the sea level 8, and the other part is above the sea level 8; the second reflected wave adjusting structure is also configured as a second reflecting plate 2 in the form of a flat plate, part of the second reflecting plate 2 is below the sea level 8, and the other part is above the sea level 8. In the present application, the surface of the first reflected wave adjusting structure that reflects the incident wave is referred to as the first reflecting surface 11, and the surface of the second reflected wave adjusting structure that reflects the incident wave is referred to as the second reflecting surface 21, obviously, for the embodiment shown in Figures 6 to 10 , the first reflecting surface 11 and the second reflecting surface 21 are both planar.

[0079] When the waves are incident and reach the first reflecting plate 1 and the second reflecting plate 2, the reflection occurs on the first reflecting surface 11 of the first reflecting plate 1 and the second reflecting surface 21 of the second reflecting plate 2 respectively, and the corresponding reflected waves are generated. Since the reflected waves caused by the two reflecting surfaces have the same frequency as the incident waves, in the sea area between the two reflecting surfaces, the reflected waves and the incident waves will appear the alternately distributed constructive interference regions and destructive interference regions due to the interference effect of the waves. In each constructive interference region, the amplitude of the up-and-down movement of the waves becomes larger than that of the incident waves, so the constructive interference region becomes a wave energy concentration region. Correspondingly, in the destructive interference region, the amplitude of the up-and-down movement of the waves becomes smaller than that of the incident waves, or even no up-and-down movement occurs.

[0080] Further, the first reflecting plate 1 and the second reflecting plate 2 can rotate around their respective rotation axes. In this embodiment, the rotation axes 31 of the first reflecting plate 1 and the second reflecting plate 2 are coaxial, i.e., the two reflecting plates rotate coaxially. Figures 6 to 7 In the embodiment shown in the figure, the first reflecting plate 1 and the second reflecting plate 2 have the same rotation axis 31, i.e., the two reflecting plates rotate coaxially.

[0081] The axis of the rotation axis 31 extends along the Z-axis direction (i.e., perpendicular to the sea level 8). In some alternative embodiments, the rotation axis 31 can be arranged by directly inserting into the seabed, or by inserting into a base with a large mass such as cement, metal, etc., and then fixing the base to the seabed. The first reflecting plate 1 and the second reflecting plate 2 are rotatably connected to the rotation axis 31 through their respective shaft sleeves. Preferably, an axial locking mechanism is arranged on the shaft sleeves of the two reflecting plates and on the rotation axis 31. After the first reflecting plate 1 and the second reflecting plate 2 are installed on the rotation axis 31 and adjusted to the appropriate axial position, the two reflecting plates are axially locked by the axial locking mechanism, so as to ensure that when the two reflecting plates are in the working state, they can only perform the rotation movement around the rotation axis 31, and cannot perform the axial displacement.

[0082] Since the first reflecting plate 1 and the second reflecting plate 2 can independently adjust the angle of rotation around the rotation axis 31, the angle of the reflected waves caused by the two reflecting plates can be independently adjusted according to the incident angle and the wavelength (or frequency) of the incident waves, so as to realize the effect of adjusting the constructive interference region (wave energy concentration region) of the waves with any incident angle and wavelength to a preset fixed point position. In the embodiments of the present application, the preset fixed point position refers to the position of the float 5 in Figure 6 and Figure 9 , Figure 10 .

[0083] As mentioned earlier, float 5, as a key component of the oscillating wave energy power generation system, is used to capture the vertical motion of ocean waves. Figures 6 to 10 In the illustrated embodiment, the float 5 can be fitted onto the slide rod 6. The lower end of the slide rod 6 is also positioned relative to the seabed by inserting it into the seabed or into a base fixed to the seabed. The axis of the slide rod 6 extends along the Z-axis (i.e., perpendicular to the sea level 8), and its upper end extends above the sea level 8. In this way, the position of the float 5 in the XY plane is fixed, so it can only perform reciprocating oscillating motion along the Z-axis. Preferably, the slide rod 6 is provided with a limiting mechanism located below and / or above the sea level 8 to ensure that when the float 5 oscillates axially along the slide rod 6, its oscillation amplitude does not exceed the range that the power generation equipment (especially PTO) can withstand. It should be understood that, in addition to Figures 6 to 10 The method shown can also be achieved by using a chute, single-point mooring, or other methods to ensure that the float 5 moves along the Z-axis at a fixed position on the XY plane.

[0084] Without loss of generality, the fixed position of the float 5, that is, the projection position of the sliding rod 6 on the sea level 8, can be set as the origin of the XY plane. Its coordinates in the XY plane are Let the projection position of the rotation axis 31 on sea level 8 be a point on the XY plane. Obviously, since the rotation axis 31 is fixedly inserted into the seabed, the point... Similarly, it is a fixed point on the XY plane, i.e., a fixed position. The radial distance to the rotating shaft 31 is a constant.

[0085] Furthermore, the point can be With point The line connecting the two points is taken as the X-axis, and the direction perpendicular to both the X-axis and Z-axis is taken as the Y-axis direction. Obviously, since both the first reflector 1 and the second reflector 2 are around point 1... The rotation axis 31 rotates, therefore, in order to modulate the amplitude enhancement region to the point... The projection line 111 of the first reflecting surface 11 of the first reflector 1 on the sea level 8 and the projection line 211 of the second reflecting surface 21 of the second reflector 2 on the sea level 8 should be located at points respectively. With point The two sides of the line. Through this dual-sided dynamic adjustment, wave focusing and energy focusing effects can be achieved at fixed locations under different sea conditions, breaking the wave focusing limitations of traditional single energy focusing structures and achieving full coverage adaptation to a wide range of incident angle-wavelength sea conditions.

[0086] In some alternative embodiments, the wave energy high-efficiency conversion device based on dynamic fixed-point concentrating can further comprise a rotating driving unit 4 for driving the first reflecting plate 1 and the second reflecting plate 2 to rotate independently, which can be configured by various driving devices known to those skilled in the art, for example, in the embodiment shown in the figure, the rotating driving unit 4 comprises a first hydraulic transmission mechanism 41 and a second hydraulic transmission mechanism 42. Figures 6 to 10 In the embodiment shown in the figure, the rotating driving unit 4 comprises a first hydraulic transmission mechanism 41 and a second hydraulic transmission mechanism 42, wherein the first hydraulic transmission mechanism 41 is composed of a telescopic hydraulic rod, the first end 411 of which is hinged to the fixed seat 12 on the side of the first reflecting plate 1 away from the second reflecting plate 2, and the second end 412 is hinged to the base 71 fixedly arranged on the platform 7 (which can be a seawall or a sea operation platform, etc.), by adjusting the amount of hydraulic oil injected into the first hydraulic transmission mechanism 41, the length of the telescopic hydraulic rod can be changed, thereby adjusting the angle of the first reflecting plate 1 rotating around the rotating shaft 31; the second hydraulic transmission mechanism 42 is also composed of a telescopic hydraulic rod, the structure and the connection mode with the second reflecting plate 2 and the platform 7 of which can be referred to the first hydraulic transmission mechanism 41, by adjusting the amount of hydraulic oil injected into the second hydraulic transmission mechanism 42, the length of the telescopic hydraulic rod can be changed, thereby adjusting the angle of the second reflecting plate 2 rotating around the rotating shaft 31. Figures 6 to 10 Figure 7 In the embodiment shown in the figure, the rotating driving unit 4 comprises a first hydraulic transmission mechanism 41 and a second hydraulic transmission mechanism 42, wherein the first hydraulic transmission mechanism 41 is composed of a telescopic hydraulic rod, the first end 411 of which is hinged to the fixed seat 12 on the side of the first reflecting plate 1 away from the second reflecting plate 2, and the second end 412 is hinged to the base 71 fixedly arranged on the platform 7 (which can be a seawall or a sea operation platform, etc.), by adjusting the amount of hydraulic oil injected into the first hydraulic transmission mechanism 41, the length of the telescopic hydraulic rod can be changed, thereby adjusting the angle of the first reflecting plate 1 rotating around the rotating shaft 31; the second hydraulic transmission mechanism 42 is also composed of a telescopic hydraulic rod, the structure and the connection mode with the second reflecting plate 2 and the platform 7 of which can be referred to the first hydraulic transmission mechanism 41, by adjusting the amount of hydraulic oil injected into the second hydraulic transmission mechanism 42, the length of the telescopic hydraulic rod can be changed, thereby adjusting the angle of the second reflecting plate 2 rotating around the rotating shaft 31.

[0087] It can be understood that in some other embodiments, those skilled in the art can also use other alternative structures instead of hydraulic transmission mechanisms to achieve the driving of the rotation of the first reflecting plate 1 and the second reflecting plate 2, for example, using a foldable connecting rod structure, by adjusting the folding degree of the connecting rod to change the rotating angle of the reflecting plate.

[0088] The radial length of the first reflecting surface 11 and the second reflecting surface 21 can be determined according to the distance between the rotating shaft 31 and the fixed-point position where the float 5 is located (i.e. Figure 11 the midpoint and the distance between the point ), in order to ensure that when the included angle between the first reflecting plate 1 and the second reflecting plate 2 is small, the reflected wave caused by the reflecting plate can reach the point , in some preferred embodiments, the radial length of the first reflecting plate 1 and the radial length of the second reflecting plate 2 are not less than the radial distance between the rotating shaft 31 and the fixed-point position where the float 5 is located.

[0089] In addition, when the first reflecting surface 11 is located at a height above the sea level 8 and a height​ , the second reflecting surface 21 is located at a height above sea level 8 and at a height below sea level 8 , both of which can be determined according to statistical data of the amplitude of the incident wave, for example, the wave monitoring history data of the area where the conversion device is arranged can be extracted, and the maximum amplitude of the wave can be extracted , , , , Both of them can be set to be greater than or equal to to ensure that the incident wave of any amplitude can be effectively reflected.

[0090] Figure 10 A flow chart of a control method for controlling the aforementioned wave energy efficient conversion device based on dynamic fixed-point wave focusing is shown, which is provided according to some embodiments of the present application, so that when the wave is incident at any incident angle and wavelength, the fixed point where the float 5 is located is in a wave constructive interference area (energy focusing area). As Figures 6 to 10 shown, the control method includes the following steps:

[0091] Step S1, obtaining the incident angle and wavelength of the incident wave;

[0092] Step S2, searching for each group of two-dimensional adjustment parameter combinations in a two-dimensional adjustment parameter search space under the known conditions of the incident angle and wavelength of the incident wave, obtaining the two-dimensional adjustment parameter combination that makes the wave energy focusing effect of the fixed point reach the maximum value under the known conditions as the optimal two-dimensional adjustment parameter combination, wherein the two-dimensional adjustment parameter combination includes the first adjustment parameter and the second adjustment parameter;

[0093] Step S3, adjusting the first reflecting wave adjustment structure and the second reflecting wave adjustment structure based on the optimal two-dimensional adjustment parameter combination.

[0094] The specific embodiments of the control method will be described in detail below with the flat plate-shaped reflecting wave adjustment structure shown in Figure 12 , in order to describe the implementation steps of the control method, the parameters involved are defined first. Figure 12 A schematic diagram for describing the parameters of the incident wave, the first reflecting wave adjustment structure, the second reflecting wave adjustment structure, and the reflecting wave is shown in a specific embodiment, as Figure 12 shown, taking sea level 8 as the XY plane, the angle between the projection line 111 of the first reflecting surface 11 of the first reflecting plate 1 on the sea level 8 and the X axis is defined as the first rotation angle , and the angle between the projection line 211 of the second reflecting surface 21 of the second reflecting plate 2 on the sea level 8 and the X axis is defined as the second rotation angle The angle between the projection line 111 of the first reflecting surface 11 on the sea level 8 and the projection line 211 of the second reflecting surface 21 on the sea level 8 is defined as the opening angle of the first reflecting surface 11 and the second reflecting surface 21 The angle between the opening angle and the X axis is defined as the orientation angle of the first reflecting surface 11 and the second reflecting surface 21 The angle between the wave incident direction and the X axis is defined as the incident angle of the incident wave .

[0095] It should be understood that, Figure 11 The coordinate and parameter definitions shown only show one optional embodiment, but do not constitute a limitation on the technical solutions of the present application, and those skilled in the art can adaptively adjust the above-mentioned coordinate system, parameter definitions, etc. according to the needs of the calculation method. The reference selected for the definition of different parameters can be the same or different, for example, the positive direction of the X axis can be taken as the reference, and the angle between a certain direction and the positive direction of the X axis in the clockwise direction can be taken as the angle of the direction. In addition, in order to facilitate description, as shown in Figure 11 , the positive direction of the X axis can be taken as the reference for defining the wave incident angle , and the negative direction of the X axis can be taken as the reference for defining the first rotation angle , the second rotation angle , etc. and the angles rotated in the clockwise and counterclockwise directions along the negative direction of the X axis are taken as the parameter values respectively. Obviously, the above-mentioned definition methods are only for convenience, and do not change the interference condition between the incident wave and the reflected wave.

[0096] On the basis of establishing the parameter definition method shown in Figure 6 , the conversion device provided by the present application can adjust the constructive interference region (wave energy concentration region) of the wave with any incident angle and wavelength to the preset fixed point position. It should be understood according to the implementable conditions in engineering, that is, any incident angle refers to the positive direction of the X axis, between -90° and 90°.

[0097] As described above, for the incident wave causing the floater 5 to oscillate, the direction and oscillation characteristics thereof can be described by the incident angle and the wavelength of the incident wave. Obviously, for any group , as the first rotation angle Figure 7 of the first reflecting plate 1 in the embodiment shown in Figure 6 , As the angle between the reflected wave and the X-axis changes, the angle between the reflected wave and the X-axis caused by the first reflection adjustment structure can be defined as the first reflection angle. Similarly, with the second reflected wave modulation structure (i.e. Figure 7 , Figure 13 The first reflector 1) in the embodiment shown has a second rotation angle. As the angle between the reflected wave and the X-axis changes, the angle between the reflected wave and the X-axis caused by the second reflection adjustment structure can be defined as the second reflection angle. .

[0098] It can be seen that, fixed point The wave amplitude at a certain point, or in other words, the fixed point The magnitude of the wave energy at a given location is determined by the relevant parameters of the incident wave. , And the rotation angle parameters of the two reflected wave adjustment structures. , This decision was made jointly, taking into account that during the actual operation of float 5, the ocean waves always have a certain combination of incident wave parameters. , Incident, i.e., the combination of incident wave parameters , It can only be obtained through measurement and cannot be actively adjusted; therefore, in the case of , Given the given conditions, point The wave energy focusing effect at a certain point can be expressed as: , The form of a two-dimensional function:

[0099] (1).

[0100] (1) In the formula, Indicates the angle of incidence as , wavelength is The incident wave at point The energy focusing effect at a point can be characterized using methods known to those skilled in the art, for example, by means of a point. Amplitude at Amplitude of the incident wave The absolute value of the ratio measures the wave energy concentration effect at that location, that is... , Under the conditions As Alternatively, other measurable points can be used. The amount of wave energy at a given location is used as... .

[0101] Since the size of the point is determined by the interference of the incident wave and the two reflected waves, the incident angle of the incident wave and the rotation angle of the two reflecting plates can be used to conveniently obtain the reflection angle of the two reflected waves, and thus determine the propagation distance of the two reflected waves to the point , so as to determine the phase difference of the two reflected waves to the point relative to the incident wave at the point, and calculate the value of based on the interference of the waves. For example, when the wave amplitude at the point is taken as , the value of is actually the amplitude of the vertical oscillation displacement obtained by superimposing the vertical oscillation displacement of the incident wave at the point , the vertical oscillation displacement of the first reflected wave at the point determined according to , and the vertical oscillation displacement of the second reflected wave at the point determined according to .

[0102] Therefore, when the first rotation angle of the first reflected wave adjusting structure is taken as the first adjusting parameter, and the second rotation angle of the second reflected wave adjusting structure is taken as the second adjusting parameter, the implementation process of step S2 is to traverse each possible value combination of , as the known conditions, calculate the corresponding energy concentration effect for each value combination, and select the value combination corresponding to the maximum value of as the optimal two-dimensional adjusting parameter combination under the conditions of , . .

[0103] In some alternative embodiments, the opening angle of the first reflecting surface 11 and the second reflecting surface 21 in the conversion device can be taken as the first adjusting parameter, and the orientation angle of the first reflecting surface 11 and the second reflecting surface 21 can be taken as the second adjusting parameter. The energy concentration effect at the point can be expressed in the form of a two-dimensional function shown in equation (2).​

[0104] (2).

[0105] Obviously, for each combination of ,the superposition interference result of the two reflected waves and the incident wave at point can be calculated in the same way as above. Therefore, the implementation process of step S2 can also be that, taking , as known conditions, traversing each possible value combination of , calculating the corresponding wave focusing effect for each value combination, and selecting the value combination corresponding to the maximum value of as the optimal two-dimensional adjustment parameter combination under the conditions of , , .

[0106] In the embodiments of the present application, the specific algorithm for two-dimensional parameter space search in step S2 is not limited, and those skilled in the art can flexibly select various multi-parameter search algorithms, such as grid search algorithm, random search algorithm, genetic algorithm, particle swarm search algorithm, etc., taking the expression for evaluating the wave focusing effect of formula (1) or formula (2) or the like as the objective function, and searching for the optimal two-dimensional adjustment parameter combination under the conditions of , .

[0107] After completing the search of step S2, in step S3, the angles and directions of rotation of the first reflected wave adjustment structure and the second reflected wave adjustment structure in the conversion device around the rotation axis can be adjusted according to the optimal two-dimensional adjustment parameter combination searched, so that the rotation angle is in , or the opening angle and the orientation angle are in .

[0108] Figure 13 It is shown that, in a specific embodiment, under the conditions of wave incident angle and wavelength , after adjusting the adjustment parameters of the conversion device by the method provided by the present application, the wave field distribution diagram represented by the normalized wave amplitude can be seen that, by adjusting the rotation angles of the two reflecting plates of the conversion device , (or adjusting the opening angles and the orientations of the two reflecting plates), the wave focusing effect of significantly amplifying the wave amplitude at the fixed point (the black dot position in Figure 14 ) where the float is located can be achieved.

[0109] Figure 15 shows the wave field distribution represented by normalized wave amplitude under the condition of wave incidence angle , wavelength . Figures 13 to 15 shows the wave field distribution represented by normalized wave amplitude under the condition of wave incidence angle , wavelength .

[0110] It should be noted that, as can be seen from Figure 16 , due to the existence of incident waves and reflected waves, the wave amplitude at each point on the sea surface presents a complex interference state, therefore, the goal of adjusting the conversion device is not to adjust the region with the largest wave amplitude in the entire plane to the position of the floater (in fact, under certain incident wave conditions, no matter how the two reflective plates are arranged, it is impossible to adjust the region with the largest wave amplitude in the entire plane to the position of the floater), but to ensure that under a given incident wave condition, the setting that maximizes the wave amplitude at the fixed point position is found from all possible settings of the adjustment device.

[0111] The above step S2 can be a real-time search based on the , measured in real time when the conversion device is in operation, in addition, in some preferred embodiments, as shown in Figure 6 , step S4 can also be added on the basis of steps S1 to S3:

[0112] Step S4: Statistically determine the optimal two-dimensional adjustment parameter combination under multiple combinations of incident angle and wavelength, and establish a control strategy for the wave energy efficient conversion device based on dynamic fixed-point wave focusing based on the statistical results.

[0113] For example, multiple combinations can be constructed according to a predetermined wavelength interval and incident angle interval, the corresponding optimal two-dimensional adjustment parameter combination is determined through step S2, thereby obtaining a two-dimensional adjustment parameter table of the conversion device, during the operation of the conversion device, the , measured in real time can be used to determine the adjustment mode of the conversion device in a table lookup manner.

[0114] Table 2 below lists part of the two-dimensional adjustment parameter table established according to step S4 in one specific embodiment, wherein the wavelength range is 0.3m to 1.5m, the incident wave angle is taken with an interval of 5°, and the optimal adjustment parameters obtained by searching are , .

[0115] Table 2. Two-dimensional adjustment parameter table (partial)

[0116]

[0117]

[0118]

[0119]

[0120] After obtaining the two-dimensional adjustment parameter table in Table 2 through step S4, this two-dimensional adjustment parameter table can be used as the control strategy for the conversion device. During the operation of the conversion device, the control strategy is based on the real-time measurements obtained. The optimal combination of two-dimensional adjustment parameters is determined by looking up a table, and the corresponding adjustment command is sent to the rotary drive unit (for example, when the rotary drive unit is...). Figures 6 to 10 In the embodiment shown, when there are two hydraulic transmission mechanisms, the adjustment command is to adjust the amount of hydraulic oil injected into the two hydraulic transmission mechanisms to adjust the first and second reflection wave adjustment structures to the state specified by the optimal two-dimensional adjustment parameter combination.

[0121] Because each group A set of optimal two-dimensional adjustment parameters can be found through searching, such as Therefore, in some preferred embodiments, the statistical results described above can be further used to fit and obtain the desired result. The function expression for the optimal adjustment parameter of the independent variable can be found in Table 2 above. and The data is subjected to nonlinear least squares fitting to obtain the fitted data. , The expression:

[0122] .

[0123] In other embodiments, an opening angle may also be used. and orientation angle As a combination of two-dimensional control parameters, the optimal combination of two-dimensional control parameters is established using the same processing method. The corresponding two-dimensional adjustment parameter table, or the following construction. , The expression:

[0124] .

[0125] exist Figure 17In the embodiment shown, the reflecting surfaces of the two reflecting wave adjustment structures are arranged in a planar shape. In other embodiments, the first reflecting wave adjustment structure and the second reflecting wave adjustment structure can also have other shapes of reflecting surfaces, for example, Figures 6 to 10 In the embodiment shown, the first reflecting wave adjustment structure and the second reflecting wave adjustment structure have arc-shaped reflecting surfaces 11' and 21', respectively. Obviously, with this shape of reflecting wave adjustment structure, the propagation path and phase difference of the reflected wave of the arc surface can be defined based on the direction of the line connecting the two end points of the reflecting surface , and other adjustment parameters, and then the wave propagation path and phase difference of the reflected wave of the arc surface are determined according to the wave theory, and the interference superposition wave field is calculated to search for the optimal adjustment parameters.

[0126] In Figure 18 the embodiment shown, the two reflecting wave adjustment structures are arranged in a coaxial rotating manner. In other alternative embodiments, as shown in ​ , the first reflecting wave adjustment structure and the second reflecting wave adjustment structure can also be arranged in a non-coaxial manner, i.e., the first reflecting plate 1 and the second reflecting plate 2 are respectively provided with rotating shafts 321 and 322, so that the first reflecting plate 1 rotates around the rotating shaft 321, and the second reflecting plate 2 rotates around the rotating shaft 322, and the radial distance from the fixed point position to the rotating shafts 321 and 322 remains unchanged. It can be understood that the line 33 connecting the projections of the rotating shafts 321 and 322 on the sea level is drawn, and the perpendicular line 34 is drawn from the fixed point position to the line 33, and the projection line of the first reflecting surface 11 on the sea level and the projection line of the second reflecting surface 21 on the sea level are located on the two sides of the perpendicular line 34.

[0127] The two reflecting wave adjustment structures arranged in a non-coaxial manner are particularly suitable for application scenarios such as offshore platforms, and at this time, the two reflecting wave adjustment structures can also play a flow guiding role. When the incident wave angle meets certain conditions, the incident wave can be guided to flow through a gradually narrowing flow channel at high speed, and further, a turbine power generation device can be arranged at the position of the flow channel after acceleration to simultaneously achieve two different wave energy enhancement effects.

[0128] The specific embodiments of the present application are described in detail above, and for those skilled in the art, without departing from the principles of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also belong to the protection scope of the claims of the present application.

Claims

1. A control method for controlling a wave energy high-efficiency conversion device based on dynamic fixed-point wave focusing, the wave energy high-efficiency conversion device based on dynamic fixed-point wave focusing comprising a first reflected wave adjustment structure, a second reflected wave adjustment structure, and a rotation drive unit; The first and second reflected wave adjustment structures can each rotate independently around their respective rotation axes that remain unchanged at a radial distance from the fixed position, so as to independently adjust the orientation of the generated reflected waves, so that the fixed position is in the constructive interference region of the incident wave and the reflected wave. The rotation drive unit is used to drive the first and second reflected wave adjustment structures to rotate independently. Its characteristic is that it includes the following steps: S1, obtain the incident angle and wavelength of the incident wave; S2, with the incident angle and wavelength of the incident wave as known conditions, search for each set of two-dimensional adjustment parameter combinations in the two-dimensional adjustment parameter search space to obtain the two-dimensional adjustment parameter combination that makes the wave energy focusing effect at the fixed position reach the maximum value under the known conditions, as the optimal two-dimensional adjustment parameter combination, wherein the two-dimensional adjustment parameter combination includes the first adjustment parameter and the second adjustment parameter. S3, adjust the first reflected wave adjustment structure and the second reflected wave adjustment structure based on the optimal two-dimensional adjustment parameter combination.

2. The control method according to claim 1, characterized in that, It also includes the following steps: S4. Statistically analyze the optimal two-dimensional adjustment parameter combinations under multiple combinations of incident angles and wavelengths, and establish a control strategy for a wave energy high-efficiency conversion device based on dynamic fixed-point wave focusing based on the statistical results.

3. The control method according to claim 2, characterized in that, The control strategy is a two-dimensional adjustment parameter table, or based on the incident angle of the incident wave. and wavelength The function expression for the optimal adjustment parameter of the independent variable.

4. The control method according to claim 3, characterized in that, The first adjustment parameter is the first rotation angle of the first reflected wave adjustment structure. The second adjustment parameter is the second rotation angle of the second reflected wave adjustment structure. The functional expression for the optimal adjustment parameter is: ， in, for The optimal value, for The optimal value; or, The first adjustment parameter is the opening angle of the first reflecting surface of the first reflection wave adjustment structure and the second reflecting surface of the second reflection wave adjustment structure. The second adjustment parameter is the orientation angle of the first reflective surface and the second reflective surface. The functional expression for the optimal adjustment parameter is: ， in, for The optimal value, for The optimal value.

5. The control method according to claim 1, characterized in that, The first reflection wave adjustment structure has a first reflecting surface for reflecting the incident wave, and the second reflection wave adjustment structure has a second reflecting surface for reflecting the incident wave. The rotation axes of the first and second reflected wave adjustment structures are perpendicular to the sea level.

6. The control method according to claim 5, characterized in that, The first reflected wave adjustment structure and the second reflected wave adjustment structure have the same rotation axis or have different rotation axes; When the first and second reflective wave adjustment structures have the same rotation axis, the projection lines of the first and second reflective surfaces on the sea level are located on both sides of the line connecting the fixed point and the projection position of the same rotation axis of the two reflective wave adjustment structures on the sea level. When the first and second reflective wave adjustment structures have different rotation axes, a perpendicular line is drawn from the fixed position to the projection position of the respective rotation axes of the two reflective wave adjustment structures on the sea level. The projection lines of the first and second reflective surfaces on the sea level are located on both sides of the perpendicular line.

7. The control method according to claim 6, characterized in that, The first reflective surface and the second reflective surface are either planar or curved.

8. The control method according to claim 6, characterized in that, The radial length of the first reflecting surface is not less than the radial distance between the rotation axis of the first reflecting wave adjustment structure and the fixed position; The radial length of the second reflecting surface is not less than the radial distance between the rotation axis of the second reflecting wave adjustment structure and the fixed position.

9. The control method according to claim 6, characterized in that, The height of the first reflective surface above sea level and the height of it below sea level are both greater than or equal to 1 / 2 of the maximum wave amplitude of the deployment area. The height of the second reflector above sea level and the height below sea level are both greater than or equal to 1 / 2 of the maximum wave amplitude of the deployment area.

10. The control method according to claim 1, characterized in that, The rotary drive unit includes a first hydraulic transmission mechanism and a second hydraulic transmission mechanism; The first hydraulic transmission mechanism adjusts the angle of rotation of the first reflective wave adjustment structure around the rotation axis by adjusting the length of its telescopic hydraulic rod. The second hydraulic transmission mechanism adjusts the angle of rotation of the second reflective wave adjustment structure around the rotation axis by adjusting the length of its telescopic hydraulic rod.

Images