Wave energy power generation device based on bistable stochastic resonance

Abstract

The invention provides a bistable stochastic resonance-based wave power generation device. The bistable stochastic resonance-based wave power generation device comprises a cylindrical linear generator, a rack and a bistable movement mechanism, the device can be directly installed on various suitable offshore carriers, when the offshore carriers shake under the action of waves, the cylindrical linear generator converts mechanical energy into electric energy, the mover is triggered to do bistable motion through the bistable motion mechanism, and the capture bandwidth and efficiency of the device on random wave frequency are improved. The cylindrical linear generator, the bistable motion mechanism with the spring as a main tool and the rack are combined, wave energy power generation based on the bistable principle of potential energy trap crossing motion is achieved, the capture bandwidth of the device for random wave frequency is widened, the energy capture efficiency when the wave frequency is low is improved, and the device is suitable for large-scale popularization and application. The conversion efficiency of the power generation device to random wave energy is improved, and the adaptability of the device to external continuously-changing sea conditions is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wave energy power generation, and in particular to a wave energy power generation device based on bistable stochastic resonance. Background Art

[0002] Ocean energy is a clean and renewable energy source. Its scientific development and utilization are of great significance to alleviating the energy crisis and environmental pollution. There are many types of ocean energy, among which wave energy has the advantages of high energy density and wide distribution. Traditional wave energy power generation devices have limitations such as low energy capture efficiency and narrow energy capture bandwidth. In addition, since the power generation device needs to work in a seawater environment, the working environment is relatively harsh, which greatly reduces the service life of the device and increases the difficulty of subsequent maintenance. Therefore, there is a need for a power generation device that can be separated from the marine working environment and can use the principle of probabilistic resonance to broaden the device's capture bandwidth for random wave frequencies and improve the wave energy conversion efficiency.

[0003] When the offshore carrier shakes due to the action of waves, the power generation device can capture the mechanical energy generated by the carrier shaking, realizing the conversion of wave energy to offshore carrier mechanical energy and then to electrical energy. At the same time, the power generation device uses springs to form a bistable stochastic resonance system, which can realize bistable motion. The principle of bistable stochastic resonance is used to broaden the device's capture bandwidth for random wave frequencies, increase the energy conversion efficiency when the wave energy frequency is low, and improve the device's adaptability to continuously changing sea conditions. Summary of the invention

[0004] In response to the technical problems raised above, a wave energy power generation device based on bistable stochastic resonance is provided, which can effectively broaden the capture bandwidth of the device for random wave frequencies, enhance the adaptability of the device to various sea conditions, and improve the conversion efficiency of the power generation device for random wave energy. At the same time, the offshore carrier is used as the working environment of the power generation device, which extends the service life of the device, greatly increases the stability of the device, and reduces the maintenance difficulty and manufacturing cost of the device.

[0005] The technical means adopted by the present invention are as follows:

[0006] A wave energy power generation device based on bistable stochastic resonance comprises: a cylindrical linear generator, a frame and a bistable motion mechanism; wherein:

[0007] The cylindrical linear generator comprises a stator unit and a mover unit, wherein:

[0008] The stator unit includes a stator core, an armature winding and a stator shaft;

[0009] The mover unit includes a permanent magnet and a mover housing, and two connection modules are arranged on the mover housing;

[0010] The frame comprises a side plate, an upper plate and a bottom plate, the axial side plate is tightly connected to the stator unit shaft, and the upper plate is symmetrically provided with two rows of strip holes;

[0011] The bistable motion mechanism comprises an elastic module and a linear roller guide, wherein:

[0012] The elastic module includes a spring, an adjusting screw, a tuning fork-shaped rigid rod and a base. The spring and the adjusting screw are respectively mounted on the two fork arms of the tuning fork-shaped rigid rod. The length of the springs on the two fork arms is adjusted by the adjusting screw. The bottom end of the tuning fork-shaped rigid rod is connected to the base, and the fork arms on both sides are connected to the connection module through the strip holes in the upper plate. The mover unit moves axially along the stator unit through a linear roller guide.

[0013] Furthermore, the cylindrical linear generator adopts a structure in which the stator unit is inside and the mover unit is outside, and the length of the mover unit is 0.3 to 0.7 times the length of the stator unit.

[0014] Furthermore, in the cylindrical linear generator:

[0015] The armature winding is in a circular shape and is nested in the stator core slot.

[0016] Furthermore, in the cylindrical linear generator:

[0017] The permanent magnet is in a circular ring shape, and the N-pole and S-pole permanent magnets are radially magnetized or alternately arranged in a Halbach form on the inner side of the mover housing.

[0018] Furthermore, in the bistable motion mechanism:

[0019] The bottom end of the fork handle of the tuning fork-shaped rigid rod is smoothly connected to the base, and the tuning fork-shaped rigid rod swings flexibly within a limited range under the action of waves; the fork arm passes through the strip hole in the upper plate and is connected to the mover housing, and the mover unit moves axially under the drive of the fork arm.

[0020] Furthermore, in the bistable motion mechanism:

[0021] The original length L of the spring is greater than the length H of the spring when the mover unit is at the middle point, and less than the length W of the spring when the mover unit is at the maximum displacement point;

[0022] When the mover unit is located at the middle point, the spring is in a compressed state; when the mover unit is at the maximum displacement points on the left and right sides, the spring is in an extended state; both provide the mover unit with an axial force to return to the steady state point.

[0023] Furthermore, the magnitude of the axial force provided by the spring is adjusted by adjusting the screw coefficient.

[0024] Furthermore, when the mover unit swings left and right, the fork arm of the tuning fork-shaped rigid rod will drive the rigid rod to swing left and right, and the length of the spring on the tuning fork-shaped rigid rod will change, generating tension or pressure between the mover unit and the mover unit. The random fluctuation component in the wave enables the mover unit to move across the potential well, thereby increasing the swing amplitude of the mover unit and improving the power generation efficiency.

[0025] Furthermore, since the ocean waves can be considered as the superposition of periodic waves and random waves, the bistable motion mechanism and the superimposed random waves enhance the capture bandwidth of the wave energy frequency captured by the wave energy power generation device.

[0026] Furthermore, the wave energy power generation device is fixedly installed on a suitable offshore carrier through a bottom plate, thereby ensuring the stability and maneuverability of the entire wave energy power generation device.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] 1. The present invention provides a wave energy power generation device based on bistable stochastic resonance, which realizes wave energy power generation based on the bistable principle of cross-potential energy well motion by combining a cylindrical linear generator, a bistable motion mechanism with a spring as the main tool, and a frame, thereby broadening the capture bandwidth of the device for random wave frequencies, increasing the energy capture efficiency when the wave frequency is low, improving the conversion efficiency of the power generation device for random wave energy, and improving the adaptability of the device to continuously changing external sea conditions.

[0029] 2. The wave energy power generation device based on bistable stochastic resonance provided by the present invention can be directly installed on various suitable offshore carriers, has high flexibility and maneuverability, avoids the harsh marine working environment, extends the service life of the device, improves the reliability of the device, and facilitates later maintenance and production.

[0030] Based on the above reasons, the present invention can be widely promoted in fields such as wave energy generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0032] Figure 1 It is a schematic diagram of the overall structure of the wave energy power generation device based on bistable stochastic resonance of the present invention.

[0033] Figure 2It is a schematic cross-sectional structural diagram of a wave energy power generation device based on bistable stochastic resonance of the present invention.

[0034] Figure 3 It is a schematic diagram of the stator unit structure of the cylindrical linear generator of the present invention.

[0035] Figure 4 It is a schematic diagram of the structure of the mover unit of the cylindrical linear generator of the present invention.

[0036] Figure 5 It is a schematic diagram of the spring length-position relationship of the wave energy power generation device of the present invention.

[0037] Figure 6 This is a diagram of the magnetic circuit structure of the wave energy power generation device of the present invention.

[0038] Figure 7 It is a schematic diagram of the bistable state of the wave energy power generation device of the present invention.

[0039] Figure 8 It is a schematic diagram of the potential energy-position relationship of the wave energy power generation device of the present invention.

[0040] In the figure: 1. Cylindrical linear generator; 1-1. Stator unit; 1-1-1. Stator core; 1-1-2. Armature winding; 1-1-3. Stator shaft; 1-2. Mover unit; 1-2-1. Permanent magnet; 1-2-2. Mover housing; 1-2-3. Connection module; 2. Frame; 2-1. Side panel; 2-2. Upper panel; 2-2-1. Strip hole; 2-3. Bottom plate; 3. Bistable motion mechanism; 3-1. Elastic module; 3-1-1. Spring; 3-1-2. Adjusting screw; 3-1-3. Tuning fork-shaped rigid rod; 3-1-4. Base; 3-2. Linear roller guide. DETAILED DESCRIPTION

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0045] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0046] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0047] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0048] like Figure 1-2 As shown, the present invention provides a wave energy power generation device based on bistable stochastic resonance, comprising: a cylindrical linear generator 1, a frame 2 and a bistable motion mechanism 3; wherein:

[0049] The cylindrical linear generator 1 comprises a stator unit 1-1 and a mover unit 1-2, wherein:

[0050] like Figure 3 As shown, the stator unit 1-1 includes a stator core 1-1-1, an armature winding 1-1-2 and a stator shaft 1-1-3;

[0051] like Figure 4 As shown, the mover unit 1-2 includes a permanent magnet 1-2-1 and a mover housing 1-2-2, and two connection modules 1-2-3 are arranged on the mover housing 1-2-2;

[0052] The frame 2 includes a side plate 2-1, an upper plate 2-2 and a bottom plate 2-3. The axial side plate 2-1 is tightly connected to the stator unit shaft 1-1-3, and the upper plate 2-2 is symmetrically provided with two rows of strip holes 2-2-1.

[0053] The bistable motion mechanism 3 comprises an elastic module 3-1 and a linear roller guide 3-2, wherein:

[0054] The elastic module 3-1 includes a spring 3-1-1, an adjusting screw 3-1-2, a tuning fork-shaped rigid rod 3-1-3 and a base 3-1-4. The spring 3-1-1 and the adjusting screw 3-1-2 are respectively mounted on the two fork arms of the tuning fork-shaped rigid rod 3-1-3. The length of the springs on the two fork arms is adjusted by adjusting the screw 3-1-2. The bottom end of the tuning fork-shaped rigid rod 3-1-3 is connected to the base 3-1-4. The fork arms on both sides pass through the strip holes 2-2-1 in the upper plate 2-2 and are connected to the connecting module 1-2-3. The mover unit 1-2 moves axially along the stator unit 1-1 through the linear roller guide 3-2.

[0055] In specific implementation, as a preferred embodiment of the present invention, the cylindrical linear generator 1 adopts a structure in which the stator unit 1-1 is inside and the mover unit 1-2 is outside, and the length of the mover unit 1-2 is 0.3 to 0.7 times the length of the stator unit 1-1.

[0056] In specific implementation, as a preferred embodiment of the present invention, in the cylindrical linear generator 1:

[0057] The armature winding 1-1-2 is in a circular shape and is nested in the slot of the stator core 1-1-1.

[0058] In specific implementation, as a preferred embodiment of the present invention, in the cylindrical linear generator 1:

[0059] The permanent magnet 1-2-1 is in a circular ring shape, and the N-pole and S-pole permanent magnets are radially magnetized or alternately arranged in a Halbach form on the inner side of the mover housing 1-2-2.

[0060] In specific implementation, as a preferred embodiment of the present invention, in the bistable motion mechanism 3:

[0061] The bottom end of the fork handle of the tuning fork-shaped rigid rod 3-1-3 is smoothly connected to the base 3-1-4, and the tuning fork-shaped rigid rod 3-1-3 swings flexibly within a limited range under the action of waves; the fork arm passes through the strip hole 2-2-1 in the upper plate 2-2 and is connected to the mover housing 1-2-3, and the mover unit 1-2 moves axially driven by the fork arm.

[0062] In specific implementation, as a preferred embodiment of the present invention, in the bistable motion mechanism 3:

[0063] like Figure 5 As shown, the original length L of the spring 3-1-1 is greater than the length H of the spring 3-1-1 when the mover unit 1-2 is at the middle point, and is less than the length W of the spring 3-1-1 when the mover unit 1-2 is at the maximum displacement point;

[0064] When the mover unit 1-2 is located at the middle point, the spring 3-1-1 is in a compressed state; when the mover unit 1-2 is at the maximum displacement point on the left and right sides, the spring 3-1-1 is in an extended state; both provide the mover unit 1-2 with an axial force to return to the steady state point.

[0065] In specific implementation, as a preferred embodiment of the present invention, the magnitude of the axial force provided by the spring 3-1-1 is adjusted by adjusting the screw coefficient.

[0066] In specific implementation, as a preferred embodiment of the present invention, when the mover unit 1-2 swings left and right, the fork arm of the tuning fork-shaped rigid rod 3-1-3 will drive the rigid rod to swing left and right, and the length of the spring 3-1-1 on the tuning fork-shaped rigid rod 3-1-3 will change, generating a tensile force or a compressive force between the mover unit 1-2, and the random fluctuation component in the wave will cause the mover unit 1-2 to move across the potential well, thereby increasing the swing amplitude of the mover unit 1-2 and improving the power generation efficiency. In this embodiment, the cross-potential well movement means that due to the presence of a bistable motion mechanism in the device, when the mover unit moves left and right, it will form a bistable motion system with it. If the mover unit starts to move from the first stable equilibrium position (first potential well) of the bistable system, once it crosses the unstable equilibrium position (potential barrier), its movement trend is no longer to return to the first stable equilibrium position, but to move toward the second stable equilibrium position (second potential well) under the elastic force of the spring. Through the above-mentioned cross-potential energy well movement, a power generation system based on the bistable principle is realized, which broadens the capture bandwidth of the device for random wave energy frequency and improves the conversion efficiency of the device for random wave energy.

[0067] In specific implementation, as a preferred embodiment of the present invention, since sea waves can be considered as the superposition of periodic waves and random waves, the bistable motion mechanism 3 and the superimposed random waves enhance the capture bandwidth of the wave energy generation device for capturing wave energy frequencies.

[0068] In specific implementation, as a preferred embodiment of the present invention, the wave energy power generation device is fixedly installed on a suitable offshore carrier through the bottom plate 2-3 to ensure the stability and maneuverability of the entire wave energy power generation device.

[0069] like Figure 6As shown, it is a magnetic circuit structure diagram of a wave power generation device. When the entire power generation device is in a stationary state, the direction of the magnetic circuit in the cylindrical linear generator 1 is: starting from the N-pole permanent magnet of the mover unit 1-2, passing through the air gap, entering the stator core 1-1-1, bypassing the armature winding 1-1-2 in the stator core 1-1-1, passing through the air gap, entering the adjacent S-pole permanent magnet, and finally passing through the mover shaft 1-2-2 to return to the original N-pole permanent magnet, forming a closed loop. When the mover unit 1-2 moves one tooth pitch to the left or right, although the magnetic lines of force still start from the N-pole permanent magnet, pass through the air gap, enter the stator core 1-1-1, bypass the coil armature winding 1-1-2 in the stator core 1-1-1, pass through the air gap, enter the adjacent S-pole permanent magnet, and finally pass through the mover shaft 1-2-2 to return to the N-pole permanent magnet, for the same armature winding 1-1-2, the direction of the magnetic flux passing through is opposite to that of the previous moment. When the offshore carrier sways left and right due to the action of waves, the power generation device sways left and right along with the carrier. At this time, the mover unit 1-2 also sways left and right due to the action of the linear roller guide 3-2. At this time, the direction of the magnetic flux through each armature winding 1-1-2 continues to flip and change, thereby inducing an alternating electromotive force in the armature winding coil 1-1-2, thereby achieving the purpose of energy conversion.

[0070] like Figure 7 As shown, it is a schematic diagram of the bistable state of the wave energy power generation device, wherein P a and P b is a stable equilibrium point (potential well), and O is an unstable equilibrium point (potential barrier). The stable equilibrium position, for example, when the motor unit 1-2 is at P a When the mover unit 1-2 is at P, the mover unit 1-2 is slightly shaken by the carrier at sea and deviates from the equilibrium position. Then, the mover unit 1-2 can return to the equilibrium point under the elastic force of the spring 3-1-1. b The potential barrier position refers to when the mover unit 1-2 is at this equilibrium position, the mover unit 1-2 at this time is deviated from the equilibrium position by the slight instantaneous shaking of the marine carrier and cannot return to the unstable equilibrium point. In more detail, when the mover unit 1-2 is at the unstable equilibrium point O, after being slightly shaken to the left or right by the marine carrier, the elastic force of the spring 3-1-1 will further intensify the movement in this direction, so that it tends to the stable equilibrium point P to the left. a , or tends to the stable equilibrium point P to the right b .

[0071] like Figure 8 As shown in the figure, it is a schematic diagram of the potential energy-position relationship of the wave power generation device. According to the minimum potential energy principle of the bistable system, when the potential energy of the entire power generation device is the minimum, the power generation device will be in a stable equilibrium state. a and Pb The potential energy of the stable equilibrium point is the smallest. Since an object always tends to move in the direction of decreasing potential energy, for example, the mover unit 1-2 in the cylindrical linear generator 1 is at the first stable equilibrium point P a When the potential well starts to sway left and right, if the swaying amplitude under the action of wave energy is small, the motor unit 1-2 will eventually return to the equilibrium point P a (potential well), once the wave energy causes the power generation device to cross the potential barrier point, its movement trend is no longer to return to the original equilibrium point, but to move towards the second stable equilibrium point P under the elastic force of the spring 3-1-1 in the bistable motion mechanism 3 b (potential well) movement, thereby realizing bistable cross-potential well movement; when the motor unit 1-2 moves from the second stable equilibrium point P b When the (potential well) begins to sway left and right, its movement across the potential energy well is the same as described above.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wave energy power generation device based on bistable stochastic resonance, characterized in that: include: A cylindrical linear generator (1), a frame (2) and a bistable motion mechanism (3); wherein: The cylindrical linear generator (1) comprises a stator unit (1-1) and a mover unit (1-2), wherein: The stator unit (1-1) comprises a stator core (1-1-1), an armature winding (1-1-2) and a stator shaft (1-1-3); The mover unit (1-2) comprises a permanent magnet (1-2-1) and a mover housing (1-2-2), and two connection modules (1-2-3) are arranged on the mover housing (1-2-2); The frame (2) comprises a side plate (2-1), an upper plate (2-2) and a bottom plate (2-3); the axial side plate (2-1) is tightly connected to the stator unit shaft (1-1-3); and the upper plate (2-2) is symmetrically provided with two rows of strip holes (2-2-1); The bistable motion mechanism (3) comprises an elastic module (3-1) and a linear roller guide rail (3-2), wherein: The elastic module (3-1) comprises a spring (3-1-1), an adjusting screw (3-1-2), a tuning fork-shaped rigid rod (3-1-3) and a base (3-1-4); the spring (3-1-1) and the adjusting screw (3-1-2) are respectively sleeved on two fork arms of the tuning fork-shaped rigid rod (3-1-3); the length of the springs on the two fork arms is adjusted by the adjusting screw (3-1-2); the bottom end of the tuning fork-shaped rigid rod (3-1-3) is connected to the base (3-1-4); the fork arms on both sides pass through the strip holes (2-2-1) in the upper plate (2-2) and are connected to the connection module (1-2-3); the mover unit (1-2) moves axially along the stator unit (1-1) through the linear roller guide rail (3-2).

2. A wave energy power generation device based on bistable stochastic resonance according to claim 1, characterized in that: The cylindrical linear generator (1) adopts a structure in which the stator unit (1-1) is inside and the mover unit (1-2) is outside, and the length of the mover unit (1-2) is 0.3 to 0.7 times the length of the stator unit (1-1).

3. A wave energy power generation device based on bistable stochastic resonance according to claim 2, characterized in that: In the cylindrical linear generator (1): The armature winding (1-1-2) is in a circular shape and is nested in a slot of the stator core (1-1-1).

4. A wave energy power generation device based on bistable stochastic resonance according to claim 2, characterized in that: In the cylindrical linear generator (1): The permanent magnet (1-2-1) is in a circular ring shape, and the N-pole and S-pole permanent magnets are radially magnetized or alternately arranged in a Halbach form on the inner side of the mover housing (1-2-2).

5. A wave energy power generation device based on bistable stochastic resonance according to claim 1, characterized in that: In the bistable motion mechanism (3): The bottom end of the fork handle of the tuning fork-shaped rigid rod (3-1-3) is smoothly connected to the base (3-1-4), and the tuning fork-shaped rigid rod (3-1-3) flexibly swings within a limited range under the action of waves; the fork arm passes through the strip hole (2-2-1) in the upper plate (2-2) and is connected to the mover housing (1-2-3), and the mover unit (1-2) moves axially under the drive of the fork arm.

6. A wave energy power generation device based on bistable stochastic resonance according to claim 1, characterized in that: In the bistable motion mechanism (3): The original length L of the spring (3-1-1) is greater than the length H of the spring (3-1-1) when the mover unit (1-2) is located at the middle point, and is less than the length W of the spring (3-1-1) when the mover unit (1-2) is at the maximum displacement point; When the mover unit (1-2) is located at the middle point, the spring (3-1-1) is in a compressed state; when the mover unit (1-2) is at the maximum displacement point on the left and right sides, the spring (3-1-1) is in an extended state; both provide the mover unit (1-2) with an axial force to return to a steady state point.

7. A wave energy power generation device based on bistable stochastic resonance according to claim 6, characterized in that: The magnitude of the axial force provided by the spring (3-1-1) is adjusted by adjusting the screw coefficient.

8. A wave energy power generation device based on bistable stochastic resonance according to claim 1, characterized in that: When the mover unit (1-2) swings left and right, the tuning fork-shaped rigid rod (3-1-3) is driven to swing left and right through the fork arm, and the length of the spring (3-1-1) on the tuning fork-shaped rigid rod (3-1-3) changes, generating a tensile force or a compressive force between the mover unit (1-2), and the random fluctuation component in the wave causes the mover unit (1-2) to move across the potential well, thereby increasing the swing amplitude of the mover unit (1-2) and improving the power generation efficiency.

9. A wave energy power generation device based on bistable stochastic resonance according to claim 1, characterized in that: Since sea waves can be considered as the superposition of periodic waves and random waves, the bistable motion mechanism (3) and the superimposed random waves enhance the capture bandwidth of the wave energy frequency captured by the wave energy power generation device.

10. A wave energy power generation device based on bistable stochastic resonance according to claim 1, characterized in that: The wave energy power generation device is fixedly installed on a suitable offshore carrier via a bottom plate (2-3), thereby ensuring the stability and maneuverability of the entire wave energy power generation device.

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