A rotary underwater fish gathering power generation device and its working method

Abstract

The present invention discloses a rotary underwater fish-aggregating power generation device and its operating method, comprising a float, a power generation module, and a payload module; the payload module includes a housing, a rechargeable power source, a lifting unit, a storage box, and a pressure pump; the power generation module includes a main column, a rotating bearing, brushes, Q rotating frames, a sealing sleeve, and a main delivery pipe. The present invention utilizes a rotary structure to securely attach a piezoelectric composite flexible membrane to the main column and rotating frame, such as a cantilever beam. A mixture of fish-aggregating element and feed is released outward at different locations on the power generation carrier to attract fish to the device. The piezoelectric composite flexible membrane is bent and deformed by the water flow and the fish, generating and storing current. The present invention can be mounted on a payload for simultaneous use, enhancing endurance during cable-free operations in deep waters and continuous, long-term ocean exploration missions. It offers excellent concealment and utilizes the marine environment to generate electricity, but the device does not require special installation or active implantation onto marine organisms.

Description

Technical Field

[0001] The present invention relates to the field of underwater power supply equipment, and in particular to a rotary underwater fish gathering power generation device and a working method thereof. Background Art

[0002] In fields such as marine scientific research, marine resource exploration, and joint coastal defense early warning, endurance and power supply are crucial when carrying payloads such as underwater robots, underwater sensors, and underwater acoustic releasers on underwater missions. These issues directly impact mission duration and recovery frequency. Existing underwater power supply systems, such as cable-based power supply systems, require long cables for traction and connection to a mother ship, limiting the payload's range in the open ocean. Long cables also increase energy loss. Cable-free power supply systems rely primarily on batteries carried by the payload, which must be charged on the surface. This requires frequent recovery and release for long-term missions, consuming additional time. How to capture energy and resources from the underwater or ocean environment and convert them into electricity to extend the endurance of payload batteries, while simultaneously utilizing the water environment while minimizing the environmental and ecological impact of power generation equipment, are promising research areas with considerable potential and application potential. Further innovations and breakthroughs are needed in underwater power supply methods. The present invention utilizes lighter and more economical consumables such as polyfish or pheromones, feed, and utilizes factors such as water flow changes caused by the movement of fish schools and constant ocean currents to propose a new concept for controllable underwater power generation in open sea waters. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a rotary underwater fish gathering power generation device and a working method thereof in view of the defects involved in the background technology and in response to application needs.

[0004] The present invention adopts the following technical solutions to solve the above technical problems:

[0005] A rotary underwater fish gathering power generation device comprises a float, a power generation module and a load module;

[0006] The float is used to provide buoyancy;

[0007] The payload module comprises a housing, a rechargeable power source, a lifting unit, a storage box and a pressure pump;

[0008] The rechargeable power source, lifting unit, storage box, and pressure pump are all arranged in the housing;

[0009] The storage box is in the shape of a needle tube, a piston is provided inside the box, and a solenoid valve is provided at the outlet thereof, for storing a mixture of polyfish and feed;

[0010] The pressure pump is used to drive the piston in the storage box to pump the mixture of polyfish and feed out of the outlet of the storage box when the solenoid valve is opened;

[0011] The lifting unit is used to adjust the weight of the load module to control its rise or sinking;

[0012] The power generation module comprises a main column, a rotating bearing, a brush, Q rotating frames, a sealing sleeve and a main conveying pipe, where Q is a natural number greater than or equal to 2;

[0013] The main column is a hollow cylinder or a hollow regular polygonal column with sealed ends, the upper end of which is detachably connected to the float, and the lower end is fixedly connected to the shell;

[0014] The main delivery pipe is arranged in the main column, one end of which is closed, and the other end of which passes through the shell from the main column and is sealed and connected to the outlet of the storage box;

[0015] A plurality of release holes are evenly arranged on the side wall of the main column, and the release holes are connected to the main delivery pipe through pipelines, and are used to release the mixture of polypiscetin and feed driven by the pressure pump and delivered to the net cage through the central control hose to attract fish;

[0016] The rotating bearing and brush are both arranged on the upper part of the main column; the inner ring of the rotating bearing is coaxially fixedly connected to the main column; the brush is a multi-brush head brush, including a slip ring and Q brush heads, wherein the slip ring is located above the rotating shaft bearing and coaxially fixedly connected to the main column; the Q brush heads are evenly arranged around the circumference of the main column, all of which are fixedly connected to the outer ring of the rotating bearing and all cooperate with the slip ring;

[0017] The rotating frame includes a rotating beam, a first vertical beam, a second vertical beam, and P horizontal beams, where P is a natural number greater than or equal to 1;

[0018] The rotating beam, the first vertical beam, and the second vertical beam are all hollow, the first vertical beam and the second vertical beam are arranged in parallel and one end of each is vertically fixedly connected to the rotating beam, and the first vertical beam and the second vertical beam are both connected to the rotating beam;

[0019] The P cross beams are equidistantly and parallelly arranged between the first vertical beam and the second vertical beam, with one end of each cross beam vertically connected to the first vertical beam and the other end of each cross beam vertically connected to the second vertical beam;

[0020] The cross beam is hollow, and both ends of the cross beam are connected to the first vertical beam and the second vertical beam respectively, so that the rotating frame is hollow as a whole;

[0021] A plurality of piezoelectric composite flexible membranes are evenly arranged on the outer wall of the crossbeam; the piezoelectric composite flexible membranes adopt piezoelectric energy harvesters and are in the shape of strips, each of which is fixed at one end and free at the other end;

[0022] The Q rotating frames correspond to the Q brush heads in a one-to-one manner and are evenly arranged around the circumference of the rotating bearing. One end of each rotating beam is fixedly connected to the outer ring of the rotating bearing, so that the first vertical beams of the Q rotating frames are located between the float and the shell and are parallel to the main column.

[0023] The sealing sleeve is a hollow cylinder that is closed at the top and bottom. The center of its upper and lower end faces is provided with through holes for the main column to pass through, and the side walls are provided with through holes for the rotating beams of the Q rotating frames to pass through. The sealing sleeve is sleeved over the main column to contain the rotating bearings and brushes. The side walls of the sealing sleeve are tightly connected to the rotating beams of the Q rotating frames. Sealing rings are provided between the through holes on the upper and lower end faces of the sealing sleeve and the main column.

[0024] The fixed ends of the piezoelectric composite flexible membranes on the P beams in the rotating frame are all extended from the rotating frame into the sealing ring through wires and then pass out, and are electrically connected to the brushes corresponding to the rotating frame; and are used to transmit the electrical energy generated by the piezoelectric composite flexible membrane when it is bent under force to the rechargeable and dischargeable power supply;

[0025] The slip ring is extended from the main column into the shell through a wire and then passes through the shell to be connected to the rechargeable and dischargeable power supply.

[0026] As a further optimization solution of the rotary underwater fish gathering power generation device of the present invention, it also includes a signal receiver and a control module;

[0027] The signal receiver is used to receive external radio commands and transmit them to the control module;

[0028] The control module is electrically connected to the rechargeable and dischargeable power supply, signal receiver, lifting unit, solenoid valve, and pressure pump respectively, and is used to control the lifting unit, solenoid valve, pressure pump, and rechargeable and dischargeable power supply to work according to received instructions.

[0029] As a further optimization scheme of the rotary underwater fish gathering power generation device of the present invention, a plurality of piezoelectric composite flexible membranes are evenly provided on the outer wall of the main column. The piezoelectric composite flexible membranes are fixedly connected at one end and have a free end at the other end. The fixed end extends from the main column into the shell through a wire and then passes through it to be connected to the rechargeable and dischargeable power supply.

[0030] As a further optimization solution of the rotary underwater fish gathering power generation device of the present invention, the piezoelectric composite flexible membrane on the outer wall of the main column forms M groups of power generation units, each group of power generation units includes N piezoelectric composite flexible membranes, and M and N are both natural numbers greater than or equal to 1;

[0031] The M groups of power generation units are evenly arranged on the main column in a circumferential direction, and the N piezoelectric composite flexible membranes in each group of power generation units are equidistantly arranged along the axis direction of the main column.

[0032] As a further optimization scheme of a rotary underwater fish gathering power generation device of the present invention, M is an even number greater than 1, the fixed connection between the piezoelectric composite flexible membrane and the main column in the 2i-1 group of power generation units is parallel to the axis of the main column, and the fixed connection between the piezoelectric composite flexible membrane and the main column in the 2i group of power generation units is perpendicular to the axis of the main line, and i is an integer greater than or equal to 1 and less than or equal to M / 2.

[0033] As a further optimization solution of the rotary underwater fish gathering power generation device of the present invention, the Q is 2, and the rotary underwater fish gathering power generation device further includes two guide plates;

[0034] The two guide plates are arranged in parallel between the float and the housing, and are respectively vertically fixed to one end of the rotating beam in the two rotating frames away from the rotating bearing.

[0035] The present invention also discloses a working method of the rotary underwater fish gathering power generation device, which includes the following process:

[0036] Step 1) In the initial state, the rechargeable and dischargeable power supply has a preset charge, the solenoid valve is closed, and the fish aggregation element and feed are sealed in the storage box; during the sinking movement of the rotating underwater fish aggregation power generation device below the water surface, when the piezoelectric composite flexible membrane is bent upward by the upward resistance of the water, the positive piezoelectric effect generates electrical energy that is transmitted to the rechargeable and dischargeable power supply for storage, completing the pre-charging process of the descent process;

[0037] Step 2) The rotating underwater fish aggregation power generation device reaches the designated task water depth and stops. After the signal receiver receives the signal, the control module controls the pressure pump to work and controls the flow of fish aggregation element and feed through the solenoid valve to achieve intermittent release and slow release.

[0038] Polyfish and feed cause the fish to move back and forth continuously between the piezoelectric composite flexible membranes. The water flow disturbance generated around the swimming fish causes the cantilever-mounted piezoelectric composite flexible membrane to produce bending vibrations. In addition, the swinging of the fish's own body touches the piezoelectric composite flexible membrane during swimming, and the underwater or bottom ocean currents and turbulent disturbances also cause the cantilever-mounted piezoelectric composite flexible membrane to produce bending vibrations to generate electricity, which is then stored.

[0039] The present invention also discloses a working method of the rotary underwater fish gathering power generation device when Q is 2 and the device further comprises two guide plates, comprising the following process:

[0040] When the rotating underwater fish-aggregating power generation device is disturbed by underwater ocean currents, turbulence, and other incoming flows, an internal flow channel is formed between the two guide plates. The two guide plates are driven by the impact force of the incoming flow to drive the two rotating frames to rotate, making the two guide plates parallel to the incoming flow. At this time, the incoming flow and the two rotating frames are perpendicular, causing the piezoelectric composite flexible membranes on the two frames to bend toward the incoming flow direction, thereby generating electrical energy.

[0041] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects:

[0042] 1. This invention utilizes a bionic tree-like structure and a rotatable mesh mechanism to harvest some energy and resources from the underwater or marine environment and convert them into electricity. It uses lighter and more economical consumables such as piscitoxin, pheromones, and feed to increase the endurance of the payload's power battery. While utilizing the aquatic environment, it also minimizes the environmental and ecological impact of the power generation device, particularly minimizing harm to fish.

[0043] 2. This invention retains the fundamental characteristics of cable-free power supply. Compared to cabled systems, it is more discreet, allowing payloads to reach a wider range during missions. Controllable power generation reduces recovery frequency and extends the duration of single, continuous missions. Furthermore, its bionic tree-like design enhances its concealment.

[0044] 3. The length, size, and number of piezoelectric composite flexible membranes of the structure proposed in the present invention can be designed and customized according to the size of the payload and the power supply requirements of the mission. It can also be easily embedded in or carried on the payload to provide power, which is beneficial for coordinating multiple payloads to implement cluster reconnaissance or cluster combat. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of the present invention;

[0046] Figure 2 It is a cross-sectional schematic diagram of the present invention;

[0047] Figure 3 This is a schematic diagram of the structure of the main column, rotating bearing, brush and sealing sleeve in the present invention;

[0048] Figure 4 This is a schematic diagram of the structure of the rotating frame and the main column in the present invention;

[0049] Figure 5 Schematic diagram of the working principle of the piezoelectric composite flexible membrane in the present invention;

[0050] Figure 6 Schematic diagram of the installation of the piezoelectric composite flexible membrane on the power generation carrier of the present invention;

[0051] Figure 7Schematic diagram of the bending deformation of the piezoelectric composite flexible membrane during the underwater sinking process of the present invention;

[0052] Figure 8 This is a schematic structural diagram of the present invention when Q is 2 and two guide plates are included;

[0053] Figure 9 Schematic diagram of the effect of the guide plate rotating under the action of the incoming flow in the present invention;

[0054] Figure 10 This is a schematic diagram of the effect of the incoming flow acting on the piezoelectric composite flexible membrane of the rotating frame when the guide plate of the present invention is parallel to the incoming flow.

[0055] In the figure, 1- piezoelectric composite flexible membrane, 2- load module, 3- main column, 4- float, 5- rotating frame, 6- release hole, 7- solenoid valve at the outlet of the storage box, 8- mixture of polyfish and feed in the storage box, 9- piston in the storage box, 10- rechargeable and dischargeable power supply, 11- signal receiver, 12- control module, 13- housing, 14- lifting unit, 15- rotating beam, 16- second vertical beam, 17- horizontal beam, 18- rotating bearing, 19- slip ring, 20- brush head, 21- sealing sleeve. DETAILED DESCRIPTION

[0056] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings.

[0057] The present invention may be implemented in many different forms and should not be considered limited to the embodiments described herein. The accompanying drawings are merely schematic diagrams, with components exaggerated for clarity and not intended to show actual size and proportion. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0058] like Figure 1 As shown, the present invention discloses a rotary underwater fish gathering power generation device, comprising a float, a power generation module, a load module, a signal receiver and a control module;

[0059] The float is used to provide buoyancy;

[0060] like Figure 2 As shown, the payload module includes a housing, a rechargeable power source, a lifting unit, a storage box and a pressure pump;

[0061] The rechargeable power source, lifting unit, storage box, and pressure pump are all arranged in the housing;

[0062] The storage box is in the shape of a needle tube, a piston is provided inside the box, and a solenoid valve is provided at the outlet thereof, for storing a mixture of polyfish and feed;

[0063] The pressure pump is used to drive the piston in the storage box to pump the mixture of polyfish and feed out of the outlet of the storage box when the solenoid valve is opened;

[0064] The lifting unit is used to adjust the weight of the load module to control its rise or sinking;

[0065] The power generation module comprises a main column, a rotating bearing, a brush, Q rotating frames, a sealing sleeve and a main conveying pipe, where Q is a natural number greater than or equal to 2;

[0066] The main column is a hollow cylinder or a hollow regular polygonal column with sealed ends, the upper end of which is detachably connected to the float, and the lower end is fixedly connected to the shell;

[0067] The main delivery pipe is arranged in the main column, one end of which is closed, and the other end of which passes through the shell from the main column and is sealed and connected to the outlet of the storage box;

[0068] A plurality of release holes are evenly arranged on the side wall of the main column, and the release holes are connected to the main delivery pipe through pipelines, and are used to release the mixture of polypiscetin and feed driven by the pressure pump and delivered to the net cage through the central control hose to attract fish;

[0069] The rotating bearing and the brush are both arranged on the upper part of the main column; the inner ring of the rotating bearing is coaxially fixedly connected to the main column; the brush adopts a multi-brush head type brush, which includes a slip ring and Q brush heads, wherein the slip ring is located above the rotating shaft bearing and coaxially fixedly connected to the main column; the Q brush heads are evenly arranged around the circumference of the main column, and are all fixedly connected to the outer ring of the rotating bearing and are all matched with the slip ring, such as Figure 3 As shown;

[0070] like Figure 4 As shown, the rotating frame includes a rotating beam, a first vertical beam, a second vertical beam, and P horizontal beams, where P is a natural number greater than or equal to 1;

[0071] The rotating beam, the first vertical beam, and the second vertical beam are all hollow, the first vertical beam and the second vertical beam are arranged in parallel and one end of each is vertically fixedly connected to the rotating beam, and the first vertical beam and the second vertical beam are both connected to the rotating beam;

[0072] The P cross beams are equidistantly and parallelly arranged between the first vertical beam and the second vertical beam, with one end of each cross beam vertically connected to the first vertical beam and the other end of each cross beam vertically connected to the second vertical beam;

[0073] The cross beam is hollow, and both ends of the cross beam are connected to the first vertical beam and the second vertical beam respectively, so that the rotating frame is hollow as a whole;

[0074] A plurality of piezoelectric composite flexible membranes are evenly arranged on the outer wall of the crossbeam; the piezoelectric composite flexible membranes adopt piezoelectric energy harvesters and are in the shape of strips, each of which is fixed at one end and free at the other end;

[0075] The Q rotating frames correspond to the Q brush heads in a one-to-one manner and are evenly arranged around the circumference of the rotating bearing. One end of each rotating beam is fixedly connected to the outer ring of the rotating bearing, so that the first vertical beams of the Q rotating frames are located between the float and the shell and are parallel to the main column.

[0076] The sealing sleeve is a hollow cylinder that is closed at the top and bottom. The center of its upper and lower end faces is provided with through holes for the main column to pass through, and the side walls are provided with through holes for the rotating beams of the Q rotating frames to pass through. The sealing sleeve is sleeved over the main column to contain the rotating bearings and brushes. The side walls of the sealing sleeve are tightly connected to the rotating beams of the Q rotating frames. Sealing rings are provided between the through holes on the upper and lower end faces of the sealing sleeve and the main column.

[0077] The fixed ends of the piezoelectric composite flexible membranes on the P beams in the rotating frame are all extended from the rotating frame into the sealing ring through wires and then pass out, and are electrically connected to the brushes corresponding to the rotating frame; and are used to transmit the electrical energy generated by the piezoelectric composite flexible membrane when it is bent under force to the rechargeable and dischargeable power supply;

[0078] The slip ring is connected to the rechargeable and dischargeable power supply through a wire extending from the main column into the housing and then passing through the housing;

[0079] The signal receiver is used to receive external radio commands and transmit them to the control module;

[0080] The control module is electrically connected to the rechargeable and dischargeable power supply, signal receiver, lifting unit, solenoid valve, and pressure pump respectively, and is used to control the lifting unit, solenoid valve, pressure pump, and rechargeable and dischargeable power supply to work according to received instructions.

[0081] The power generation principle of piezoelectric composite flexible membrane is as follows Figure 5 As shown, when the piezoelectric composite flexible film is disturbed by a downward external force, it will bend downward. The piezoelectric film bends along with the flexible substrate and has an elongation deformation in the direction perpendicular to the thickness. Due to the positive piezoelectric effect ( d 31In a dynamic mode, this elongation and deformation causes charges of opposite polarity to appear on the upper and lower surfaces of the piezoelectric film, resulting in a positive charge on the upper surface and a negative charge on the lower surface. This creates an electric field and a potential difference between the upper and lower surfaces of the piezoelectric film. This electrical energy is extracted through wires and rectified by a circuit before being transmitted to the power supply in the load module for charging. Similarly, when the piezoelectric composite flexible membrane is disturbed by an upward external force, the piezoelectric film experiences a shortening deformation perpendicular to its thickness. This elongation and deformation causes a negative charge on its upper surface and a positive charge on its lower surface, thereby also achieving the purpose of power generation.

[0082] A plurality of piezoelectric composite flexible films are evenly arranged on the outer wall of the main column. The piezoelectric composite flexible films are fixed at one end and free at the other end. The fixed end extends from the main column into the shell through a wire and then passes through the shell to be connected to the rechargeable and discharge power supply.

[0083] The piezoelectric composite flexible membrane on the outer wall of the main column forms M groups of power generation units, each group of power generation units includes N piezoelectric composite flexible membranes, M is an even number greater than 1, and N is a natural number greater than or equal to 1; the M groups of power generation units are uniformly arranged on the main column in the circumferential direction, and the N piezoelectric composite flexible membranes in each group of power generation units are equidistantly arranged along the axis of the main column; the fixed connection between the piezoelectric composite flexible membrane and the main column in the 2i-1 group of power generation units is parallel to the axis of the main column, and the fixed connection between the piezoelectric composite flexible membrane and the main column in the 2i group of power generation units is perpendicular to the axis of the main line, and i is an integer greater than or equal to 1 and less than or equal to M / 2, such as Figure 6 shown.

[0084] The present invention also discloses a working method of the rotary underwater fish gathering power generation device, which includes the following process:

[0085] Step 1) In the initial state, the rechargeable and dischargeable power supply has a preset amount of electricity, the solenoid valve is closed, and the fish aggregation element and feed are sealed in the storage box; when the rotating underwater fish aggregation power generation device sinks below the water surface, the piezoelectric composite flexible membrane is bent upward by the upward resistance of the water, and the electrical energy generated due to the positive piezoelectric effect is transmitted to the rechargeable and dischargeable power supply for storage, completing the pre-charging process of the descent process. Figure 7 As shown;

[0086] Step 2) The rotating underwater fish aggregation power generation device reaches the designated task water depth and stops. After the signal receiver receives the signal, the control module controls the pressure pump to work and controls the flow of fish aggregation element and feed through the solenoid valve to achieve intermittent release and slow release.

[0087] Polyfish and feed cause the fish to move back and forth continuously between the piezoelectric composite flexible membranes. The water flow disturbance generated around the swimming fish causes the cantilever-mounted piezoelectric composite flexible membrane to produce bending vibrations. In addition, the swinging of the fish's own body touches the piezoelectric composite flexible membrane during swimming, and the underwater or bottom ocean currents and turbulent disturbances also cause the cantilever-mounted piezoelectric composite flexible membrane to produce bending vibrations to generate electricity, which is then stored.

[0088] like Figure 8 As shown, the present invention also provides an optimization solution for ocean currents. In this case, Q is 2, and the rotary underwater fish gathering power generation device further includes two guide plates;

[0089] The two guide plates are arranged in parallel between the float and the housing, and are respectively vertically fixed to one end of the rotating beam in the two rotating frames away from the rotating bearing.

[0090] The present invention also discloses a working method of the rotary underwater fish gathering power generation device when Q is 2 and the device further comprises two guide plates, comprising the following process:

[0091] When the rotating underwater fish gathering power generation device is disturbed by underwater ocean currents, turbulence and other incoming flows, an inner flow channel is formed between the two guide plates. The two guide plates are driven by the impact force of the incoming flow to drive the two rotating frames to rotate, so that the two guide plates are parallel to the incoming flow. Figure 9 As shown, at this time, the incoming flow is perpendicular to the two rotating frames, causing the piezoelectric composite flexible membranes on the two frames to bend toward the incoming flow direction, thereby generating electrical energy, as shown in Figure 10 shown.

[0092] When the incoming current is constant, such as the constant ocean currents in certain seasons, the rotating shaft drives the rotatable frame to stay at a new angle, that is, the plane where the suspension frame is located is always perpendicular to the incoming current direction to maintain the maximum bending power generation efficiency of the piezoelectric composite flexible membrane suspended thereon.

[0093] When the fish polymer and feed in the device are exhausted or the power loss reaches a state where maintenance is required, the signal receiver and control system receive the radio signal from the mother ship or shore base, and then rise to the water surface through the lifting unit control device. It can be lowered again after the recovery and maintenance are completed or the consumables are replenished.

[0094] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art in the art to which this invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and, unless defined as such, will not be interpreted in an idealized or overly formal sense.

[0095] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rotary underwater fish gathering power generation device, characterized in that: Includes float, power generation module and load module; The float is used to provide buoyancy; The load module comprises a housing, a rechargeable and dischargeable power supply, a lifting unit, a storage box and a pressure pump; The rechargeable and dischargeable power supply, lifting unit, storage box, and pressure pump are all arranged in the housing; The storage box is in the shape of a needle tube, a piston is provided inside the box, and a solenoid valve is provided at the outlet thereof, for storing a mixture of polyfish and feed; The pressure pump is used to drive the piston in the storage box to pump the mixture of polyfish and feed out of the outlet of the storage box when the solenoid valve is opened; The lifting unit is used to adjust the weight of the load module to control its rise or sinking; The power generation module comprises a main column, a rotating bearing, a brush, Q rotating frames, a sealing sleeve and a main conveying pipe, where Q is a natural number greater than or equal to 2; The main column is a hollow cylinder or a hollow regular polygonal column with sealed ends, the upper end of which is detachably connected to the float, and the lower end is fixedly connected to the shell; The main delivery pipe is arranged in the main column, one end of which is closed, and the other end of which passes through the shell from the main column and is sealed and connected to the outlet of the storage box; A plurality of release holes are evenly arranged on the side wall of the main column, and the release holes are connected to the main delivery pipe through pipelines, and are used to release the mixture of polypiscetin and feed driven by the pressure pump and delivered to the net cage through the central control hose to attract fish; The rotating bearing and brush are both arranged on the upper part of the main column; the inner ring of the rotating bearing is coaxially fixedly connected to the main column; the brush is a multi-brush head brush, including a slip ring and Q brush heads, wherein the slip ring is located above the rotating shaft bearing and coaxially fixedly connected to the main column; the Q brush heads are evenly arranged around the circumference of the main column, all of which are fixedly connected to the outer ring of the rotating bearing and all cooperate with the slip ring; The rotating frame includes a rotating beam, a first vertical beam, a second vertical beam, and P horizontal beams, where P is a natural number greater than or equal to 1; The rotating beam, the first vertical beam, and the second vertical beam are all hollow, the first vertical beam and the second vertical beam are arranged in parallel and one end of each is vertically fixedly connected to the rotating beam, and the first vertical beam and the second vertical beam are both connected to the rotating beam; The P cross beams are equidistantly and parallelly arranged between the first vertical beam and the second vertical beam, with one end of each cross beam vertically connected to the first vertical beam and the other end of each cross beam vertically connected to the second vertical beam; The cross beam is hollow, and both ends of the cross beam are connected to the first vertical beam and the second vertical beam respectively, so that the rotating frame is hollow as a whole; A plurality of piezoelectric composite flexible membranes are evenly arranged on the outer wall of the crossbeam; the piezoelectric composite flexible membranes adopt piezoelectric energy harvesters and are in the shape of strips, each of which is fixed at one end and free at the other end; The Q rotating frames correspond to the Q brush heads in a one-to-one manner and are evenly arranged around the circumference of the rotating bearing. One end of each rotating beam is fixedly connected to the outer ring of the rotating bearing, so that the first vertical beams of the Q rotating frames are located between the float and the shell and are parallel to the main column. The sealing sleeve is a hollow cylinder that is closed at the top and bottom. The center of its upper and lower end faces is provided with through holes for the main column to pass through, and the side walls are provided with through holes for the rotating beams of the Q rotating frames to pass through. The sealing sleeve is sleeved over the main column to contain the rotating bearings and brushes. The side walls of the sealing sleeve are tightly connected to the rotating beams of the Q rotating frames. Sealing rings are provided between the through holes on the upper and lower end faces of the sealing sleeve and the main column. The fixed ends of the piezoelectric composite flexible membranes on the P beams in the rotating frame are all extended from the rotating frame into the sealing ring through wires and then pass out, and are electrically connected to the brushes corresponding to the rotating frame; and are used to transmit the electrical energy generated by the piezoelectric composite flexible membrane when it is bent under force to the rechargeable and dischargeable power supply; The slip ring is extended from the main column into the shell through a wire and then passes through the shell to be connected to the rechargeable and dischargeable power supply.

2. The rotary underwater fish gathering power generation device according to claim 1, characterized in that: It also includes a signal receiver and a control module; The signal receiver is used to receive external radio commands and transmit them to the control module; The control module is electrically connected to the rechargeable and dischargeable power supply, signal receiver, lifting unit, solenoid valve, and pressure pump respectively, and is used to control the lifting unit, solenoid valve, pressure pump, and rechargeable and dischargeable power supply to work according to received instructions.

3. The rotary underwater fish gathering power generation device according to claim 1, characterized in that: A plurality of piezoelectric composite flexible films are evenly arranged on the outer wall of the main column. The piezoelectric composite flexible films are fixed at one end and free at the other end. The fixed end extends from the main column into the shell through a wire and then passes through the shell to be connected to the rechargeable and discharge power supply.

4. The rotary underwater fish gathering power generation device according to claim 3, characterized in that: The piezoelectric composite flexible membrane on the outer wall of the main column forms M groups of power generation units, each group of power generation units includes N piezoelectric composite flexible membranes, and M and N are both natural numbers greater than or equal to 1; The M groups of power generation units are evenly arranged on the main column in a circumferential direction, and the N piezoelectric composite flexible membranes in each group of power generation units are equidistantly arranged along the axis direction of the main column.

5. The rotary underwater fish gathering power generation device according to claim 4, characterized in that: M is an even number greater than 1, the fixed connection between the piezoelectric composite flexible membrane and the main column in the 2i-1 group of power generation units is parallel to the axis of the main column, the fixed connection between the piezoelectric composite flexible membrane and the main column in the 2i group of power generation units is perpendicular to the axis of the main column, and i is an integer greater than or equal to 1 and less than or equal to M / 2.

6. The rotary underwater fish gathering power generation device according to claim 2, characterized in that: When Q is 2, the rotary underwater fish gathering power generation device further includes two guide plates; The two guide plates are arranged in parallel between the float and the housing, and are respectively vertically fixed to one end of the rotating beam in the two rotating frames away from the rotating bearing.

7. The operating method of the rotary underwater fish gathering power generation device according to claim 2, characterized in that: The following procedures are included: Step 1) In the initial state, the rechargeable and dischargeable power supply has a preset charge, the solenoid valve is closed, and the fish aggregation element and feed are sealed in the storage box; during the sinking movement of the rotating underwater fish aggregation power generation device below the water surface, when the piezoelectric composite flexible membrane is bent upward by the upward resistance of the water, the positive piezoelectric effect generates electrical energy that is transmitted to the rechargeable and dischargeable power supply for storage, completing the pre-charging process of the descent process; Step 2) The rotating underwater fish aggregation power generation device reaches the designated task water depth and stops. After the signal receiver receives the signal, the control module controls the pressure pump to work and controls the flow of fish aggregation element and feed through the solenoid valve to achieve intermittent release and slow release. Polyfish and feed cause the fish to move back and forth continuously between the piezoelectric composite flexible membranes. The water flow disturbance generated around the swimming fish causes the cantilever-mounted piezoelectric composite flexible membrane to produce bending vibrations. In addition, the swinging of the fish's own body touches the piezoelectric composite flexible membrane during swimming, and the underwater or bottom ocean currents and turbulent disturbances also cause the cantilever-mounted piezoelectric composite flexible membrane to produce bending vibrations to generate electricity, which is then stored.

8. The operating method of the rotary underwater fish gathering power generation device according to claim 6 is characterized in that: The following procedures are included: When the rotating underwater fish-aggregating power generation device is disturbed by underwater ocean currents and turbulence, an internal flow channel is formed between the two guide plates. The two guide plates are driven by the impact force of the incoming flow to rotate the two rotating frames, making the two guide plates parallel to the incoming flow. At this time, the incoming flow and the two rotating frames are perpendicular, causing the piezoelectric composite flexible membranes on the two frames to bend toward the incoming flow direction, thereby generating electrical energy.

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