Sea wave frequency adaptive sea wave power generation device

Abstract

This invention relates to the field of wave power generation technology, and more particularly to a wave power generation device with adaptive wave frequency, comprising a float shell, a linear power generation module, a volume adjustment module, an energy storage battery module, a frequency detection module, and a control module. This invention achieves this by incorporating a gas spring structure at the bottom of the magnetic core mover, adjusting the internal volume of the gas spring structure to control the stiffness of the magnetic core mover within the linear power generation module, and by using the frequency detection and control modules, ensuring that the natural frequency of the wave power generation device remains highly matched to the real-time frequency of the waves. This ensures that the magnetic core mover of the linear power generation module is continuously in a resonant state, maximizing the vibration amplitude and velocity of the magnetic core mover in the resonant state. This allows the linear power generation module to more fully convert mechanical energy into electrical energy, thereby significantly improving the wave energy capture efficiency of the entire system and achieving stable and efficient power generation output.

Description

Technical Field

[0001] This invention relates to the field of wave power generation technology, and in particular to a wave power generation device with adaptive wave frequency. Background Technology

[0002] Wave energy generation is a technology that converts the kinetic and potential energy of ocean waves into electrical energy. It has developed rapidly globally in recent years and achieved breakthroughs. Current technology involves using energy harvesting devices to convert the up-and-down movement or back-and-forth oscillation of waves into mechanical energy, which is then used to drive a generator to output electrical energy. There are three main types of technology: 1. Oscillating water column type: This utilizes the impact of waves on seawater within a closed air chamber, causing it to oscillate and push air through a turbine to generate electricity. This device has a simple structure and good corrosion resistance, but its energy conversion efficiency is relatively low. 2. Nodding duck type: This uses a floating body that oscillates with the waves, driving a hydraulic system or gear mechanism to generate mechanical energy, which then drives a generator. However, its placement is limited, requiring a platform or shoreline structure. 3. Float linear motor type: This uses a floating body that moves up and down with the waves to drive a built-in linear generator to produce electrical energy. Because the float linear motor type of wave energy generation offers a more direct and efficient energy conversion method, it has become the mainstream research direction for wave energy generation.

[0003] Chinese Patent Publication No. CN114278491A discloses a novel wave energy resonant absorbing wave power generation device. Its technical solution involves adjusting the counterweight of a buoy to create a resonance effect, increasing the kinetic energy of its vertical movement, thereby driving a power pump and turbine to generate electricity. However, the power generation is still determined by the degree of buoy buoy movement. Existing float-based linear motor wave power generation also connects a linear motor actuator to a float, with the power generation determined by the degree of float movement. Therefore, existing technologies mostly utilize the energy generated by the buoy's movement for power generation. However, ocean waves are an ultra-low frequency energy source and are easily affected by the actual marine environment, resulting in unstable power generation and relatively low efficiency. Summary of the Invention

[0004] Therefore, the present invention provides a wave power generation device with adaptive wave frequency to solve the problem of low power generation efficiency of float linear motor type wave power generation in the prior art.

[0005] To achieve the above objectives, the present invention provides a wave power generation device with adaptive wave frequency, comprising a float shell, a linear power generation module, a volume adjustment module, a frequency detection module, and a control module; The linear power generation module is set inside the float shell. The linear power generation module is equipped with a magnetic core mover that can move up and down. A gas spring structure is set at the bottom of the magnetic core mover. The gas spring structure is used to control the stiffness of the magnetic core mover inside the linear power generation module by changing its volume. The control module is connected to the volume adjustment module and the frequency detection module respectively. The control module can calculate the target volume of the gas spring structure based on the real-time wave frequency detected by the frequency detection module, and adjust the internal volume of the gas spring structure at the bottom of the magnetic core mover through the volume adjustment module to form a resonance match.

[0006] Furthermore, the outer shell of the float is a spherical hollow shell structure, and a first plate is provided inside the outer shell of the float. The first plate is fixedly connected to the outer shell of the float. The first plate is a circular plate structure, and the diameter of the plate surface is equal to the inner diameter of the outer shell of the float. A second plate is also provided inside the float shell. The second plate is arranged parallel to one side of the first plate. The diameter of the second plate is smaller than that of the first plate. The second plate is connected to the first plate through a connecting cylinder, and the second plate does not contact the inner wall of the float shell.

[0007] Furthermore, the connecting cylinder is a cylindrical tube structure with openings at the top and bottom. Flanges are provided on both the top and bottom of the connecting cylinder, and it is rigidly connected to the first plate and the second plate through the flanges. The connection position is located at the center of the surface of the first plate and the second plate.

[0008] Furthermore, the linear power generation module includes a winding stator and a magnetic core mover. The winding stator is fixedly installed inside the connecting cylinder, and the magnetic core mover passes through the winding stator. The magnetic core mover can slide up and down relative to the winding stator, generating relative cutting magnetic field lines motion, and converting mechanical energy into electrical energy through electromagnetic induction effect.

[0009] Furthermore, an upper extension rod is fixedly installed on the top of the magnetic core mover, and an upper cover is sleeved on the outside of the upper extension rod. The upper cover is a two-stage stepped tube structure. The inner diameter of the tube at the bottom of the upper cover is larger than the inner diameter of the tube at the top of the upper cover. The lower end of the upper cover is connected to the top surface of the first plate through a flange. An opening is provided at the top of the upper cover. A limit assist spring is also provided in the tube at the top of the upper cover. The upper end of the limit assist spring is fixedly connected to the edge of the opening at the top of the upper cover. The magnetic core mover can move up and down inside the tube at the bottom of the upper cover, and the upper extension rod can move up and down inside the tube at the top of the upper cover. The top of the upper extension rod can also abut against the limiting spring to compress and deform it.

[0010] Furthermore, a lower extension rod is fixedly installed at the bottom of the magnetic core mover, and a lower cover is sleeved on the outside of the lower extension rod. The lower cover is a two-stage stepped tube structure. The inner diameter of the tube at the top of the lower cover is larger than the inner diameter of the tube at the bottom of the lower cover. The upper end of the lower cover is connected to the bottom surface of the second plate through a flange. The magnetic core mover can move up and down inside the tube in the upper part of the lower cover, and the lower extension rod can move up and down inside the tube in the lower part of the lower cover. The lower end of the lower extension rod is also provided with a sliding seal, so that the tube in the lower part of the lower cover and the lower extension rod form a sealed gas spring structure.

[0011] Furthermore, the volume adjustment module includes an adjustment air chamber and a servo motor; A telescopic plunger is installed inside the regulating air chamber. The telescopic plunger is connected to a servo motor. The servo motor adjusts the volume inside the regulating air chamber by controlling the extension and retraction of the telescopic plunger. The regulating air chamber is connected to the gas spring structure through an air passage pipe.

[0012] Furthermore, the frequency detection module includes a vibration sensor and a data acquisition card. The vibration sensor is used to collect the real-time vibration frequency of the buoy shell as the real-time wave frequency. The data acquisition card is used to convert the analog signal output by the vibration sensor into a digital signal and then transmit it to the control module via an RS485 bus.

[0013] Furthermore, when the control module calculates the target volume of the gas spring structure, if it detects an increase in the wave frequency, the control module will calculate that the internal volume of the gas spring structure needs to be reduced, and adjust the internal volume of the gas spring structure at the bottom of the magnetic core mover through the volume adjustment module to achieve resonance matching; if it detects a decrease in the wave frequency, the control module will calculate that the internal volume of the gas spring structure needs to be increased, and adjust the internal volume of the gas spring structure at the bottom of the magnetic core mover through the volume adjustment module to achieve resonance matching.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: by integrating the wave power generation device into the buoy shell and setting a linear power generation module to directly convert the mechanical energy of the buoy's up-and-down floating into electrical energy, and by setting a gas spring structure at the bottom of the magnetic core mover, the stiffness of the magnetic core mover within the linear power generation module is controlled by adjusting the internal volume of the gas spring structure, making the vibration mode of the magnetic core mover controllable. Furthermore, by setting a frequency detection module and a control module, the natural frequency of the wave power generation device is always highly matched with the real-time frequency of the waves, ensuring that the magnetic core mover of the linear power generation module is continuously in a resonant state. In the resonant state, the vibration amplitude and speed of the magnetic core mover are maximized, enabling the linear power generation module to more fully convert mechanical energy into electrical energy, thereby significantly improving the wave energy capture efficiency of the entire system and achieving stable and efficient power generation output. Attached Figure Description

[0015] Figure 1 This is a front view of the wave power generation device with adaptive wave frequency in this embodiment. Figure 2 This is a cross-sectional structural diagram of the linear power generation module in this embodiment; Figure 3 This is a cross-sectional structural diagram of the volume adjustment module in this embodiment; Figure 4 This is a three-dimensional side view of the wave power generation device with adaptive wave frequency in this embodiment.

[0016] Reference numerals: 1. Float shell, 101. First plate, 102. Second plate, 103. Connecting cylinder, 2. Linear power generation module, 201. Magnetic core mover, 202. Winding stator, 203. Upper extension rod, 204. Upper cover, 205. Limiting spring, 206. Lower extension rod, 207. Lower cover, 208. Gas spring structure, 3. Volume adjustment module, 301. Air pipe, 302. Servo motor, 303. Adjusting air chamber, 304. Telescopic plunger, 4. Energy storage battery module, 401. Battery pack, 5. Frequency detection module, 6. Control module. Detailed Implementation

[0017] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0018] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0019] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0020] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] Please see Figure 1 As shown, this embodiment provides a wave power generation device with adaptive wave frequency, including a float shell 1, a linear power generation module 2, a volume adjustment module 3, an energy storage battery module 4, a frequency detection module 5, and a control module 6. Specifically, the float shell 1 is a spherical hollow shell structure, and a first plate 101 is provided inside the float shell 1. The first plate 101 is fixedly connected to the float shell 1. The first plate 101 is a circular plate structure, and the diameter of the plate surface of the first plate 101 is equal to the inner diameter of the float shell 1, so as to ensure that the edge of the first plate 101 can be stably fixed inside the float shell 1, so that the first plate 101 divides the float shell 1 into two symmetrical regions. The float shell 1 is also provided with a second plate 102. The second plate 102 is located on one side of the first plate 101 and is arranged parallel to the first plate 101. The diameter of the second plate 102 is smaller than the diameter of the first plate 101. The second plate 102 is connected to the first plate 101 through a connecting cylinder 103, and the second plate 102 does not contact the inner wall of the float shell 1. The first plate 101 and the second plate 102 are made of high-strength lightweight alloy material. The connecting cylinder 103 is a cylindrical tube structure with openings at the top and bottom. Flanges are provided on both the top and bottom of the connecting cylinder 103. The connecting cylinder 103 is rigidly connected to the first plate 101 and the second plate 102 by high-strength bolts. The connection position is located at the center of the plate surface of the first plate 101 and the second plate 102. The center of the plate surface of the first plate 101 and the second plate 102 is provided with a circular opening. After the first plate 101 is connected to the second plate 102 through the connecting cylinder 103, a cylindrical cavity structure with openings at the top and bottom is formed.

[0022] By setting a first plate 101, a second plate 102, and a connecting cylinder 103 inside the float shell 1, the basic support structure of the wave power generation device is formed. Since the float shell 1 will undergo slight deformation under the impact of waves, the first plate 101 is connected to the float shell 1 to reduce the impact of the deformation of the float shell 1 on the balance of the internal components. If the second plate 102 is also fixedly connected to the float shell 1, a strong support will be formed inside the float shell 1, and the force of the deformation of the float shell 1 will act directly on the inside of the float shell 1. This will not only affect the overall stability of the wave power generation device, but also disrupt the transmission of vibration force, thereby affecting the power generation efficiency.

[0023] Specifically, the linear power generation module 2 is installed inside the connecting cylinder 103, and the bottom of the linear power generation module 2 is connected to the volume adjustment module 3 through the air pipe 301. Please continue reading. Figure 2As shown, the linear power generation module 2 includes a winding stator 202 and a magnetic core mover 201. The winding stator 202 is fixedly installed inside the connecting cylinder 103, and the magnetic core mover 201 passes through the winding stator 202. The winding stator 202 is wound with a three-phase winding. The magnetic core mover 201 has an embedded permanent magnet array. The length of the magnetic core mover 201 is greater than the length of the winding stator 202, and the magnetic core mover 201 can slide up and down relative to the winding stator 202 to generate relative cutting magnetic field lines. Through electromagnetic induction effect, mechanical energy is converted into electrical energy.

[0024] The top of the magnetic core mover 201 is provided with an upper extension rod 203, which is fixedly connected to the magnetic core mover 201. An upper cover 204 is sleeved on the outside of the upper extension rod 203. The upper cover 204 is a two-stage stepped tube structure. The inner diameter of the tube at the bottom of the upper cover 204 is larger than the inner diameter of the tube at the top of the upper cover 204. The lower end of the upper cover 204 is connected to the top surface of the first plate 101 through a flange. An opening is provided at the upper end of the upper cover 204. A limit assist spring 205 is also provided in the tube at the top of the upper cover 204. The upper end of the limit assist spring 205 is fixedly connected to the edge of the opening at the top of the upper cover 204. The inner diameter of the tube at the lower part of the upper cover 204 is greater than or equal to the cross-sectional diameter of the magnetic core mover 201, allowing the magnetic core mover 201 to move up and down within the tube at the lower part of the upper cover 204. The inner diameter of the tube at the upper part of the upper cover 204 is greater than or equal to the cross-sectional diameter of the upper extension rod 203, allowing the upper extension rod 203 to move up and down within the tube at the upper part of the upper cover 204. The top end of the upper extension rod 203 can also abut against the limiting assist spring 205 within the tube at the upper part of the upper cover 204, compressing and deforming the limiting assist spring 205.

[0025] The bottom of the magnetic core mover 201 is provided with a lower extension rod 206, which is fixedly connected to the magnetic core mover 201. A lower cover 207 is sleeved on the outside of the lower extension rod 206. The lower cover 207 is also a two-stage stepped tube structure. The inner diameter of the tube at the upper part of the lower cover 207 is larger than the inner diameter of the tube at the lower part of the lower cover 207. The upper end of the lower cover 207 is connected to the bottom surface of the second plate 102 through a flange. The lower end of the lower cover 207 is set as a closed structure. An air port is also provided on the inner wall of the tube at the lower part of the lower cover 207. The tube at the lower part of the lower cover 207 is connected to the air passage pipe 301 through the air port. The inner diameter of the tube in the upper part of the lower cover 207 is greater than or equal to the cross-sectional diameter of the magnetic core mover 201, so that the magnetic core mover 201 can move up and down inside the tube in the upper part of the lower cover 207. The inner diameter of the tube in the lower part of the lower cover 207 is greater than or equal to the cross-sectional diameter of the lower extension rod 206, so that the lower extension rod 206 can move up and down inside the tube in the lower part of the lower cover 207. The lower end of the lower extension rod 206 is also provided with a sliding seal, so that the tube in the lower part of the lower cover 207 forms a sealed gas spring structure 208. In this embodiment, the outer shell structure of the magnetic core mover 201 is jointly formed by the upper cover 204, the winding stator 202, and the lower cover 207, allowing the magnetic core mover 201 to move up and down within the outer shell structure. At the same time, an upper extension rod 203 is provided at the top of the magnetic core mover 201, and a lower extension rod 206 is provided at the bottom. Together with the limiting assist spring 205 in the upper cover 204 and the gas spring structure 208 in the lower cover 207, the magnetic core mover 201 can resonate with the up and down floating of the float shell 1 under the elastic assistance of the upper and lower sides, thereby improving the power generation efficiency.

[0026] Please continue reading. Figure 3 As shown, the volume adjustment module 3 includes a servo motor 302 disposed on the top surface of the second plate 102 and an adjustment air chamber 303 disposed on the bottom surface of the second plate 102. A telescopic plunger 304 is disposed within the adjustment air chamber 303 and is connected to the servo motor 302. The servo motor 302 controls the telescopic plunger 304 to extend and retract within the adjustment air chamber 303, thereby controlling the volume of the adjustment air chamber 303. Simultaneously, an air passage pipe 301 is connected to the side wall of the adjustment air chamber 303. By adjusting the volume of the adjustment air chamber 303, the gas pressure within the lower tube of the lower cover 207 is controlled, thereby changing the pressure of the gas within the lower cover 207, which is formed by the lower extension rod 206 and the lower cover 207. The elastic force of the gas spring structure 208 controls the stiffness of the magnetic core mover 201 in the linear power generation module 2. In actual use, an electromagnetic proportional valve and a gas filter can be installed on the gas pipe 301 according to actual needs, and a pressure sensor can be installed in the lower tube of the lower cover 207. In this embodiment, since the regulating gas chamber 303 and the lower tube of the lower cover 207 are directly connected, it is only necessary to install a pressure sensor in the lower tube of the lower cover 207. If an external gas supply is used to adjust the gas pressure in the lower tube of the lower cover 207, an electromagnetic proportional valve and a gas filter need to be installed according to the actual situation.

[0027] By setting the volume adjustment module 3, the gas pressure of the gas spring structure 208 in the linear power generation module 2 can be precisely controlled, thereby controlling the real-time vibration frequency of the magnetic core mover 201 in real time, which facilitates the resonance between the magnetic core mover 201 and the float shell 1.

[0028] Please continue reading. Figure 4As shown, the energy storage battery module 4 includes two battery packs 401 symmetrically arranged on the second plate 102. The battery packs 401 integrate rectifiers and can store the electrical energy generated by the linear power generation module 2. By setting the battery packs 401 inside the float shell 1, not only can the various power-consuming components of the wave power generation device be powered, but the symmetrical arrangement of the two battery packs 401 on the second plate 102 can ensure the stability of the wave power generation device. Furthermore, the weight of the battery packs 401 can adjust the center of gravity of the float shell 1, keeping the linear power generation module 2 inside the float shell 1 in a vertical position, thereby further improving the power generation efficiency.

[0029] In this embodiment, both the frequency detection module 5 and the control module 6 are mounted on the second flat plate 102. The frequency detection module 5 adopts a combination structure of vibration sensor and data acquisition card. The vibration sensor is used to collect the real-time vibration frequency of the buoy shell 1. Since the vibration frequency of the buoy shell 1 is consistent with the wave frequency of the ocean waves, the real-time vibration frequency of the buoy shell 1 is used as the real-time wave frequency. The data acquisition card is used to convert the analog signal output by the vibration sensor into a digital signal and then transmit it to the control module 6 through the RS485 bus. The control module 6 uses an embedded controller as its core and incorporates an adaptive control algorithm. The controller receives real-time wave frequency data transmitted by the frequency detection module 5, analyzes the real-time wave frequency using a Fourier transform algorithm, and calculates the target volume or target pressure of the gas spring structure 208 by combining it with the preset vibration system stiffness frequency correspondence curve. Then, it sends control commands to the volume adjustment module 3 via a PWM signal. In practical applications, the vibration system stiffness frequency correspondence curve needs to be combined with the specific structural form of the wave power generation device and set according to the gravity and friction forces acting on the magnetic core mover 201 in the linear power generation module 2. This will not be elaborated further here.

[0030] The specific operation process of the wave power generation device in this embodiment is as follows: When waves act on the buoy shell 1, the buoy shell 1 undergoes a periodic up-and-down motion due to the pushing force and gravity of the waves. The buoy shell 1 transmits the energy to the linear power generation module 2 through the first plate 101, first driving the winding stator 202 to move up and down. Due to inertia, the magnetic core mover 201 forms a relative displacement with the winding stator 202, generating a relative motion that cuts the magnetic field lines. Through electromagnetic induction, the mechanical vibration energy is initially converted into electrical energy, completing the initial energy conversion. At the same time, the frequency detection module 5 continuously detects the motion state of the waves in real time and transmits the detected data to the control module 6. After receiving the data, the control module 6 processes it quickly using a built-in adaptive control algorithm. Combined with the preset vibration system stiffness frequency correspondence curve, it calculates the target volume or target pressure of the gas spring structure 208, and then sends a precise adjustment command to the volume adjustment module 3 according to the target value. The volume adjustment module 3 adjusts the gas spring structure 208 in the linear power generation module 2 through the servo motor 302 to achieve resonance matching. Specifically, when an increase in wave frequency is detected, the control module 6 calculates an instruction to reduce the internal volume of the gas spring structure, i.e., to increase the internal pressure of the gas spring structure 208. The servo motor 302 in the volume adjustment module 3 will drive the telescopic plunger 304 to extend, compressing the internal space of the gas spring structure 208, reducing the volume of the gas spring structure 208, and increasing the internal pressure of the gas spring structure 208. This causes the stiffness of the magnetic core mover 201 in the linear power generation module 2 to increase accordingly, thereby driving the natural frequency of the entire wave power generation device to increase synchronously, achieving resonance matching. Conversely, when a decrease in wave frequency is detected, the control module 6 will also issue an instruction to increase the internal volume of the gas spring structure. In this embodiment, since the adjustment air chamber 303 of the volume adjustment module 3 is directly connected to the tube at the bottom of the lower cover 207, the space inside the adjustment air chamber 303 and the tube at the bottom of the lower cover 207 can be considered together as the volume of the gas spring structure 208.

[0031] Through this real-time dynamic adjustment process, the system's natural frequency is always highly matched with the real-time frequency of the waves, ensuring that the magnetic core mover 201 of the linear power generation module 2 is always in a resonant state. In the resonant state, the vibration amplitude and speed of the magnetic core mover 201 are maximized, enabling the linear power generation module 2 to more fully convert mechanical energy into electrical energy, thereby significantly improving the wave energy capture efficiency of the entire system and achieving stable and efficient power generation output.

[0032] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A wave power generation device with adaptive wave frequency, characterized in that, This includes a float shell, a linear power generation module, a volume regulation module, a frequency detection module, and a control module; The linear power generation module is installed inside the float shell. The linear power generation module is equipped with a magnetic core mover that can move up and down. A gas spring structure is installed at the bottom of the magnetic core mover. The gas spring structure is used to control the stiffness of the magnetic core mover inside the linear power generation module by changing its volume. The control module is connected to the volume adjustment module and the frequency detection module respectively. The control module can calculate the target volume of the gas spring structure based on the real-time wave frequency detected by the frequency detection module, and adjust the internal volume of the gas spring structure at the bottom of the magnetic core mover through the volume adjustment module to form a resonance match.

2. The wave power generation device with adaptive wave frequency according to claim 1, characterized in that, The float shell is a spherical hollow shell structure. A first plate is provided inside the float shell. The first plate is fixedly connected to the float shell. The first plate is a circular plate structure, and the diameter of the first plate is equal to the inner diameter of the float shell. The float shell is further provided with a second plate, which is arranged parallel to one side of the first plate. The diameter of the second plate is smaller than that of the first plate. The second plate is connected to the first plate through a connecting cylinder, and the second plate does not contact the inner wall of the float shell.

3. The wave power generation device with adaptive wave frequency according to claim 2, characterized in that, The connecting cylinder is a cylindrical tube structure with openings at the top and bottom. Flanges are provided on both the top and bottom of the connecting cylinder, and it is rigidly connected to the first plate and the second plate through the flanges. The connection position is located at the center of the surface of the first plate and the second plate.

4. The wave frequency adaptive wave power generation device according to claim 3, characterized in that, The linear power generation module includes a winding stator and a magnetic core mover. The winding stator is fixedly installed inside the connecting cylinder, and the magnetic core mover passes through the winding stator. The magnetic core mover can slide up and down relative to the winding stator, generating relative cutting magnetic field lines, and converting mechanical energy into electrical energy through electromagnetic induction effect.

5. The wave frequency adaptive wave power generation device according to claim 4, characterized in that, The top of the magnetic core mover is fixedly provided with an upper extension rod, and an upper cover is sleeved on the outside of the upper extension rod. The upper cover is a two-stage stepped tube structure. The inner diameter of the tube at the bottom of the upper cover is larger than the inner diameter of the tube at the top of the upper cover. The lower end of the upper cover is connected to the top surface of the first plate through a flange. An opening is provided at the top end of the upper cover. A limit assist spring is also provided in the tube at the top of the upper cover. The upper end of the limit assist spring is fixedly connected to the edge of the opening at the top end of the upper cover. The magnetic core mover can move up and down inside the tube at the lower part of the upper cover, and the upper extension rod can move up and down inside the tube at the upper part of the upper cover. The top of the upper extension rod can also abut against the limiting spring to compress and deform the limiting spring.

6. The wave power generation device with adaptive wave frequency according to claim 4, characterized in that, The bottom of the magnetic core mover is fixedly provided with a lower extension rod, and a lower cover is sleeved on the outside of the lower extension rod. The lower cover is a two-stage stepped tube structure. The inner diameter of the tube at the top of the lower cover is larger than the inner diameter of the tube at the bottom of the lower cover. The upper end of the lower cover is connected to the bottom surface of the second plate through a flange. The magnetic core mover can move up and down inside the tube in the upper part of the lower cover, and the lower extension rod can move up and down inside the tube in the lower part of the lower cover. The lower end of the lower extension rod is also provided with a sliding seal, so that the tube in the lower part of the lower cover and the lower extension rod form a sealed gas spring structure.

7. The wave power generation device with adaptive wave frequency according to claim 1, characterized in that, The volume adjustment module includes an adjustment air chamber and a servo motor; The regulating air chamber is equipped with a telescopic plunger, which is connected to the servo motor. The servo motor adjusts the volume of the regulating air chamber by controlling the extension and retraction of the telescopic plunger. The regulating air chamber is connected to the gas spring structure via an air passage pipe.

8. The wave power generation device with adaptive wave frequency according to claim 1, characterized in that, The frequency detection module includes a vibration sensor and a data acquisition card. The vibration sensor is used to collect the real-time vibration frequency of the buoy shell as the real-time wave frequency. The data acquisition card is used to convert the analog signal output by the vibration sensor into a digital signal and transmit it to the control module via an RS485 bus.

9. The wave power generation device with adaptive wave frequency according to claim 1, characterized in that, When the control module calculates the target volume of the gas spring structure, if it detects an increase in the wave frequency, the control module will calculate that the internal volume of the gas spring structure needs to be reduced, and adjust the internal volume of the gas spring structure at the bottom of the magnetic core mover through the volume adjustment module to achieve resonance matching; if it detects a decrease in the wave frequency, the control module will calculate that the internal volume of the gas spring structure needs to be increased, and adjust the internal volume of the gas spring structure at the bottom of the magnetic core mover through the volume adjustment module to achieve resonance matching.

10. The wave frequency adaptive wave power generation device according to claim 1, characterized in that, It also includes an energy storage battery module, which has a rectifier inside. The energy storage battery module is used to store the electrical energy generated by the linear power generation module and can also supply power to the various modules inside the float shell.

Images