482 results about "Wave power" patented technology

The invention belongs to the technical field of comprehensive utilization of ocean renewable energy sources, and particularly relates to a pilot frequency coupling-based wind wave energy multi-degree-of-freedom broadband control method, which comprises the following steps of: performing frequency domain identification on wind wave environment characteristics, and constructing a wind wave pilot frequency energy coupling model; based on the motion response characteristics of the multi-degree-of-freedom floating platform, designing a pilot frequency energy regulation and conversion mechanism; a full-working-condition dynamic optimization control strategy is adopted, and cooperative operation and energy flow self-adaptive distribution of the wind energy conversion unit and the wave energy conversion unit are achieved. Aiming at the significant difference and relevance of wind energy and wave energy in frequency characteristics, time scale and spatial distribution, a pilot frequency wind wave coupling dynamic model is established, and broadband capture of low-frequency wind-induced and high-frequency wave-induced coupling energy is realized under complex sea conditions through multi-degree-of-freedom motion decoupling and state observation, so that the wind-induced and high-frequency wave-induced coupling energy is obtained. The energy utilization rate, the attitude stability and the structural safety of the system are effectively improved, and good robustness and engineering adaptability are achieved.

The invention relates to a tide level obtaining method and system based on an OWC wave energy conversion device. The method comprises the following steps: constructing an energy loss prediction model in the air chamber; acquiring field incident wave energy, reflected wave energy, water potential energy increment, kinetic energy increment and pneumatic output energy at the current time period; inputting incident wave energy and reflected wave energy into the model to obtain predicted energy loss; and the tide level variation is solved based on the energy conservation relational expression, and the current tide level is calculated. The system comprises an energy loss prediction module, a wave energy acquisition module, a water body energy acquisition module, a pneumatic output acquisition module, an energy loss calculation module, a tide energy solving module and a tide level calculation module, which cooperatively realize the method. According to the scheme, an external tide gauge station is not needed, the local sea area tide level can be inversed in situ, at high frequency and with high precision, the method is suitable for an OWC-breakwater fusion scene, and cooperative operation of a port and ocean energy is supported.

The invention provides a coastal erosion rate prediction method, and belongs to the technical field of coastal erosion, and the method comprises the steps: building a three-dimensional seabed grid model, solving a hydrodynamic field through depth average simplification and GPU parallel calculation, and calculating sediment flux distribution based on shear stress discrimination and a high-order windward format. Outputting an erosion mode category and a local erosion strength coefficient by using a coastline erosion feature recognition model comprising a Josephh ring screening layer and a self-organizing mapping projection layer, starting adaptive grid encryption when the local erosion strength exceeds a threshold value, and calling a corresponding parameter set according to an erosion mode to calculate a seabed elevation change and a coastline erosion rate; and a wave energy spectrum reconstruction algorithm is adopted to generate future wave sequence cycle prediction, so that the technical problem that calculation precision and calculation efficiency are difficult to consider in coast erosion rate prediction under a complex wave power condition is solved.

An air turbine and a power generation device, the air turbine comprising a chamber, a valve and a rotor. The chamber comprises a first opening communicating with the atmosphere; the air pressure in the chamber is adjustable, and the difference between the air pressure in the chamber and the atmospheric pressure comprises a first air pressure difference and a second air pressure difference; the valve is connected with the chamber and is configured to open under the action of the first air pressure difference to form a first air flow by the chamber communicating with the atmosphere through the valve and the first opening respectively, and to close under the action of the second air pressure difference to form a second air flow by the chamber communicating with the atmosphere through the first opening, the directions of the first air pressure difference and the second air pressure difference being opposite; the rotor is configured to rotate under the drive of the second air flow. The air turbine can be used for power generation to convert the kinetic energy of the rotor into electrical energy, for example, the first air pressure difference and the second air pressure difference are obtained by utilizing the fluctuation of waves, and ultimately the wave energy is converted into electrical energy.

The invention discloses a wave energy prediction method based on optimized empirical mode decomposition and deep learning, and the method comprises the steps: optimizing an empirical mode decomposition process through an improved starfish algorithm, obtaining a limited number of intrinsic mode functions through the decomposition of wave data, and predicting each intrinsic mode function obtained through the decomposition through employing an improved model, according to the model, two layers of CNN are fused to enhance extraction of spatial features, three layers of LSTM network are fused to extract time features, a sparse probe and distillation operation are used to optimize a Transform decoding layer, each predicted intrinsic mode function is subjected to superposition reconstruction, and a final wave data prediction result is obtained. And inputting the predicted data into a system dynamics model of the wave energy device, and solving an optimal damping control sequence by combining real-time data and utilizing rolling optimization calculation so as to realize maximum power control.

The invention discloses a wave energy direct utilization method and device based on symmetrical wing array space synchronous conversion and energy enrichment layer optimal capture. The method takes a symmetric wing array as an energy conversion core, and cooperates through five principles: 1) constructing a large-scale stable reference; (2) recognizing and accurately deploying the symmetric wing array on a wave energy enrichment layer, namely, the center depth is 0.2 H-0. 4H below a still water surface, and the error that the device is placed in an energy depletion deepwater area is corrected in principle; 3) spatial synchronous conversion is realized, so that the array synchronously utilizes bidirectional kinetic energy of waves at any time; and 4) designing an intrinsic self-sustaining stable framework. A complete principle framework of efficient wave energy conversion is established, a self-holding high-speed wave propeller and a high-power wave power generation device can be derived, and fundamental exceeding of the prior art is achieved.

The invention relates to the technical field of water conservancy projects, and discloses an estuary channel erosion and deposition control method and system based on water column wave energy collection and release. According to the method, wave energy is captured through an oscillating water column air chamber with a bottom opening, bidirectional airflow is converted into unidirectional high-pressure airflow through an airflow rectifying unit, and the unidirectional high-pressure airflow is stored in a high-pressure energy storage container; the system monitors the flow velocity of a channel and the air pressure of the energy storage container in real time, only when the flow velocity meets a preset ebb tide transportation condition and the air pressure is higher than a critical threshold value, a trigger instruction is generated, after the instruction is responded, high-pressure gas is injected into the gas-liquid replacement excitation cavity sinking to the bottom, and water in the driving cavity forms high-speed hydraulic jet flow through a Laval nozzle to impact bottom mud. After jet flow is finished, the cavity exhausts air and relieves pressure, the external water body reversely flows back through the hydrostatic pressure of the environment, and suspended sediment is entrained and sucked. Through the cyclic operation, energy self-sufficiency, intelligent opportunity selection operation and efficient dredging are achieved, the operation cost and the environmental influence are reduced, and the method is suitable for remote and unattended navigation channel maintenance.

The application discloses a hybrid wave energy collection device, which comprises a spherical shell assembly composed of an upper spherical shell and a lower spherical shell, a wave energy capturing module arranged in the spherical shell assembly and used for capturing multi-directional wave energy and converting the wave energy into mechanical energy, and an energy conversion module used for converting the mechanical energy into electric energy. The wave energy capturing module converts wave motion into relatively straight-line motion and variable-radius swing motion. The wave energy capturing module comprises a moving rod, a top end of which is rotatably connected with an inner wall top end of the upper spherical shell; a support assembly, which comprises an upper support, a lower support and a plurality of connecting supports, a middle part of the upper support is provided with a through hole, a center of the lower support is provided with a mounting hole, and a bottom of the lower support is provided with a connecting rod; a sliding body, which is rotatably connected with the connecting rod, a lower end surface of the sliding body is a spherical surface and is matched with an inner wall of the lower spherical shell; the moving rod passes through the through hole of the upper support of the support assembly and is embedded in the mounting hole of the lower support; and the moving rod is coincident with a central axis of the support assembly. The application has the characteristics of strong working condition adaptability, high recovery efficiency, high power output density, high space position utilization rate and stable electric energy output and can provide power supply for low-power wireless sensors and provide a reliable technical scheme for realizing self-driving of wireless sensing equipment in water areas.

The invention provides a wave energy converter system comprising:—at least two actuators (2) comprising each a buoy (3) and a liquid pump (4) mechanically connected to the buoy (3) to be driven by the buoy movements, and—an electric generator (7) mechanically connected to an hydraulic motor (6) fluidically connected to each liquid pump (4), for converting a motion of the buoys (3) into electrical power, the wave energy converter system being characterized in that it comprises a closed liquid loop system (30) configured to fluidically connect the pumps (4) of different actuators (2) together, by passing through the hydraulic motor (6), wherein the liquid is constrained to flow from the pumps (4) through the hydraulic motor (6), and wherein the liquid is constrained to flow from the hydraulic motor (6) to the pumps (4) In particular, when a first one of the buoys (3) exerts a force on its associated liquid pump (4) that is greater than the force exerted by a second buoy (3), the liquid in the pump chamber of liquid pump (4) linked to the first buoy is directed to the pump chamber of the liquid pump (4) linked to the second buoy (3), through the closed liquid loop system (30) and the hydraulic motor (6). Thus, the liquid moves through the closed liquid loop system (30) and produces electricity via a generator (7) driven by a hydraulic motor (6) as soon as there is a difference of forces between the buoys (3) of different actuators (2). Different forces are produced when different buoys are in a different phase of a wave (9).

The invention relates to a double-air-chamber OWC wave energy structure based on artificial island steel cylinders, and belongs to the technical field of ocean wave energy utilization. The structure comprises adjacent steel cylinders and wave energy units embedded between the steel cylinders; the wave energy unit is provided with an air chamber body, the interior of the air chamber body is divided into a first air chamber and a second air chamber which are sequentially arranged in the wave propagation direction through a partition wall, the first air chamber is located on the outer side, and the second air chamber is located on the inner side. The second air chamber horizontally extends from one side of the first air chamber and is communicated to the water inlet. According to the structure, the wave energy units are integrated in the assembly spaces between the adjacent steel cylinders, seamless fusion with the artificial island body is achieved, and space and cost are saved; due to the fact that a flow channel of the second air chamber is longer, inertia is larger, the hydraulic path is effectively prolonged, and long-period waves are stably responded. The first air chamber is close to the water inlet, response is rapid, and short-period waves are efficiently captured. The double air chambers cooperate to achieve frequency division utilization of broadband wave energy, and the conversion efficiency and the power generation stability are remarkably improved.

A waved-powered UUV. The wave-powered UUV may comprise a nose and body. The nose may comprise a nose buttress plate and guide shaft. The body may comprise a body buttress plate having first and second clearance openings; linear-to-rotary power converter (LRPC) having a splined shaft attached to the nose buttress plate and longitudinally disposed through the first clearance opening; AC generator operably coupled to the LRPC; AC-DC converter electrically coupled to the AC generator; battery module electrically coupled to the AC-DC converter; DC motor electrically coupled to the battery module; propeller operably coupled to the DC motor; and guide shaft tube attached to the second clearance opening for receiving the guide shaft. The nose and body may be in a sliding relationship, and the wave-powered UUV may recharge its battery module when subject to wave energy by moving the nose relative to the body in a reciprocal linear motion.

The invention discloses an automatic collection device for marine floating garbage, and belongs to the field of marine environmental protection equipment. The device comprises a supporting frame, a conveying belt mechanism, a power transmission mechanism, a tension adjusting mechanism and a material receiving assembly. The supporting frame is of a detachable modular structure and is fixed stably. The conveyor belt mechanism adopts a hollow net-shaped flat belt, so that the draining function is realized; the power transmission mechanism captures wave energy through a floating block, and one-way rotation of a driving roller is achieved through a gear transmission system and an overrun clutch. The tensioning adjusting mechanism can flexibly adjust the tensioning degree of the conveying belt; and the receiving assembly realizes garbage collection and conveyor belt cleaning. The device does not need extra energy, is efficient and stable in transmission, convenient to install and maintain, high in collection efficiency, low in cost and suitable for various sea area environments such as coast and gulf, can effectively solve the problem of collection of marine litter, and has a good application prospect.

A deep-sea platform energy self-supply apparatus and a control method therefor. The apparatus comprises a work platform (1) of the deep-sea platform, and further comprises: pontoons (2) mounted at the bottom of the work platform (1); a wave energy piezoelectric assembly (3) which is provided at the bottom of the work platform (1), moves around the periphery of the pontoons (2), and can consume wave energy and convert wave energy into electrical energy; and a marine current energy piezoelectric assembly (4) provided at the bottoms of the pontoons and capable of consuming marine current energy and converting marine current energy into electrical energy. The angles and heights of wave energy piezoelectric plates (3) and marine current energy piezoelectric plates (4) are adjustable, which can effectively improve the energy conversion efficiency and consume fluid kinetic energy during the conversion of fluid kinetic energy into electrical energy such that the amplitude of waves decreases as fluid kinetic energy decreases, thereby implementing a wave dissipation effect and facilitating the improvement of the stability of the deep-sea platform.

The invention relates to the technical field of uranium extraction fiber membranes, and discloses a preparation method of an MXene / PVDF / PAO photo-thermal-piezoelectric composite fiber membrane, and the preparation method comprises the following steps: S1, dissolving PAN in DMF, adding hydroxylamine hydrochloride and NaOH, and stirring to obtain a spinning solution I; s2, PVDF is dissolved in DMF, multiple layers of MXene materials are added, and a uniform spinning solution II is obtained through stirring; and S3, preparing the MXene / PVDF / PAO fiber membrane from the spinning solution I and the spinning solution II in a double-spinning form by using an electrostatic spinning device. And jointly assembling the PAO, the PVDF nano particles and the Mxene nano sheets into the electrostatic spinning membrane. Wave energy excites the piezoelectric effect of PVDF, and light energy is absorbed by Mxene. Compared with an existing scheme, water flow resistance is smaller, adsorption sites are more, and large-scale sea tests are better facilitated.

This invention provides a floating wind and wave energy integrated power generation device and its control method. The floating wind and wave energy integrated power generation device includes a floating base, a wind turbine, and a wave energy generation device. The wind turbine is mounted on the floating base. The wave energy generation device is mounted on the floating base and includes an electrically connected oscillating float and a wave energy storage device. The oscillating float includes an upper ballast chamber and a lower ballast chamber. Both the upper and lower ballast chambers include multiple ballast sub-cavities. Each ballast sub-cavity has a water inlet and a water outlet. A water inlet valve is provided at the water inlet, and a water outlet valve is provided at the water outlet. The technical solution provided in this application can solve the problems of low utilization rate and poor synergy of wind and wave energy in related technologies.

The invention discloses efficient water pumping equipment utilizing marine environment energy, and belongs to the field of marine engineering equipment. The equipment comprises a high-pressure gas supply assembly, a guide column connected to the seabed, a middle buoy connected to the guide column in a sliding mode, and an upper telescopic cylinder and a lower telescopic cylinder which are connected to the top and the bottom of the middle buoy respectively. The high-pressure gas supply assembly can convert wind energy, solar energy, tidal energy or wave energy into compressed air and store the compressed air. The middle buoy can change the resultant force of the gravity and the buoyancy by utilizing the rising and falling of tides or through the charging and discharging of high-pressure gas and the change of the water discharging and absorbing capacity of the middle buoy, the middle buoy is acted to slide along the guide post, and the upper and lower telescopic cylinders are respectively driven to alternately pump water by the up-down movement of the middle buoy. By filling or discharging high-pressure gas into or out of the middle buoy, the buoyancy and gravity balance of the middle buoy can be actively adjusted, so that the movement frequency of the middle buoy is greatly increased, the tidal cycle limitation is broken through, and all-weather, high-frequency and efficient water pumping operation is achieved in combination with the marine environment energy storage condition.

The invention discloses a wave power generation and energy storage method based on a superconducting cable and an optimization controller. The method comprises the following steps: firstly, acquiring deviation between wave power generation power and power grid demand, and inputting the deviation to a TID controller after Laplace transformation; the core of the method is that an ant colony optimization algorithm is adopted to dynamically optimize a tilt term coefficient, an integral term coefficient and a differential term coefficient of a TID controller, a parameter space is discretized into candidate nodes, an ant colony probability optimization and pheromone updating mechanism is simulated, time weighted absolute error integral is taken as a fitness function, and an optimal control parameter combination is iteratively searched; based on the optimization result, the TID controller generates a master control signal, and after inverse transformation and physical constraint, the superconducting cable energy storage system is driven to rapidly charge and discharge, so that high-precision and self-adaptive stabilization of wave energy power fluctuation is realized. Intelligent parameter optimization and superconducting energy storage are combined, and the control performance, the response speed and the overall energy efficiency of the system are remarkably improved.

This prevents the impeller from rotating in reverse, ensuring that the impeller, stator unit, and rotor unit operate normally, and continuously rotating the rotor unit regardless of wave conditions to increase the power generation efficiency of the wave power generator. [Solution] The present invention provides a wave power generator comprising: a base; a first holder mounted on one end of the base; a second holder mounted on the other end of the base; a first pivot rod pivotally attached to the first holder; a second pivot rod pivotally attached to the second holder; a stator unit electrically connected to a connector provided on the first pivot rod; an impeller provided between the first pivot rod and the second pivot rod; a rotor unit provided between the impeller and the stator unit; and an ultraviolet unit provided between the first pivot rod and the second pivot rod, located below the impeller, and electrically connected to the stator unit.

Disclosed in the present invention are a wave energy control and allocation method and system for offshore aquaculture, comprising: acquiring aquaculture cycles of sub-aquaculture zones of an offshore aquaculture zone, sorting remaining aquaculture cycles of the sub-aquaculture zones in an ascending order, and obtaining a plurality of working cycles on the basis of a sorting result; obtaining predicted wave energy production within a following working cycle by means of a preset neural network model; obtaining an importance coefficient value sorting result of the aquaculture zones by means of a preset RFE model; and on the basis of device types of aquaculture devices, aquaculture zones where the aquaculture devices are located, the predicted wave energy production, and the importance coefficient value sorting result, sequentially adjusting operating cycles and operating powers of first-type aquaculture devices, second-type aquaculture devices, and third-type aquaculture devices. In the present invention, by establishing a prediction model, the wave energy production within the following working cycle can be predicted in advance, and then operating plans of the aquaculture devices are arranged on the basis of a prediction result, thereby avoiding the waste or shortage of resources.

The invention relates to the technical field of ocean energy development and utilization, in particular to a soft rigid arm single-point mooring wave energy power generation device which comprises a floating structure, a mooring support, a hinge power generation module, a mooring leg, a mooring arm, a column hinge shaft and a mooring tower. One end of the mooring leg is connected to the mooring support through one hinge power generation module, the other end of the mooring leg is connected to the lower end of the mooring arm through the other hinge power generation module, the upper end of the mooring arm is connected to the mooring tower through a column hinge shaft, and the mooring tower is fixedly installed on a seabed. The six-degree-of-freedom motion of the floating body can be subjected to energy capture, so that wave energy is converted; the flexible rigid arm single-point mooring system can adapt to the change of the wind wave direction and comply with the weather cock effect; the soft rigid arm single-point mooring system not only can position the wave energy power generation device, but also can convert wave energy, that is, the soft rigid arm single-point mooring system also has a wave energy conversion function.

The invention discloses a wave-light combined energy supply observation buoy for a marine ranch cluster. The wave-light combined energy supply observation buoy comprises a transparent hemispherical shell, a cylindrical shell, a photovoltaic power generation system, an oscillation floater type wave energy power generation device and a mooring system. The photovoltaic power generation unit on the inner surface of the hemispherical shell utilizes sunlight to generate power and inputs the power into the energy storage battery; the bottom of the cylindrical shell is connected with the mooring system and anchored to the seabed; an inertia pendulum power generation module of the wave energy power generation device is installed in two vertical directions, when the inertia pendulum power generation module is excited by random waves, the device captures multi-degree-of-freedom energy in sea waves for power generation, and the multi-degree-of-freedom energy is input into an energy storage battery after being rectified. The energy conversion structure of the power generation device is simple and integrated in the equipment, and the damage of seawater to a core power generation part can be prevented during working; two power generation mechanisms of solar energy and wave energy are combined to realize power generation in different sea areas and under different wave conditions, the energy output efficiency is effectively improved, and the stored electric energy can continuously supply energy to various sensors in the drifting buoy so as to prolong the endurance time of carried observation equipment.

The invention belongs to the technical field of wave energy power generation control, and provides a wave energy efficient conversion device based on dynamic fixed-point wave gathering and a control method, and the efficient conversion device comprises a first reflected wave adjusting structure, a second reflected wave adjusting structure and a rotation driving unit; the first reflected wave adjusting structure and the second reflected wave adjusting structure can independently rotate around respective rotating shafts, the radial distance between the rotating shafts and the fixed point position is kept unchanged, so that the orientation of the generated reflected wave is independently adjusted, and the fixed point position is located in a constructive interference area of the incident wave and the reflected wave; the rotation driving unit is used for driving the first reflected wave adjusting structure and the second reflected wave adjusting structure to rotate independently. According to the efficient conversion device and the control method, by dynamically adjusting the reflection angles of the two reflected waves, the fixed point position is always located in the constructive interference area of the waves, and efficient conversion of wave energy under various sea conditions is achieved.

The invention provides a deep and far sea self-sustaining fishing light wave complementary comprehensive power generation system, and belongs to the technical field of comprehensive power generation systems, and the deep and far sea self-sustaining fishing light wave complementary comprehensive power generation system comprises a sea light energy power generation system which is installed at the top of a floating platform; the wave energy power generation device is installed between the supporting stand columns of the floating type platform, and the wave energy power generation device comprises an oscillating floater, a power output system and an adjustable balance weight structure; the gravity type culture net cage system is fixed below the floating type platform, the shape of a net cage is kept through a counterweight system and an anchorage system, and the intelligent culture function is achieved through electric energy generated by a wave energy power generation device; a buoyancy structure of the floating platform and a buoyancy structure of the gravity type aquaculture net cage are shared, and the technical problems that due to independent development of offshore photovoltaic power generation, wave energy power generation and mariculture in the deep and far sea environment, the space utilization rate is low, energy supply is difficult, and collaborative optimization capacity is lacked are solved.

Buffer structure for wave power plant, comprising at least: a housing (1) consisting of a first plate (11) and a second plate (12), wherein a third plate (13) is provided between the two sides of the first plate (11) and the second plate (12), wherein the underside of the first plate (11) is provided with an inlet (111) and the underside of the second plate (12) with an outlet (121); a wave energy collector (2) comprising a support shaft (21) whose two ends are each connected to the third plates (13) via a shaft bearing (22), wherein a wave impact plate (23) and a striker bar (24) extend from the support shaft (21) perpendicular to each other, wherein the wave impact plate (23) is located near the inlet (111) and runs parallel to it; a pulley system (3) comprising a first connecting rod (31) and a second connecting rod (32), both ends of which are connected to the third plates (13), wherein a first fixed pulley (33) and a second fixed pulley (34) are arranged in the middle of the first connecting rod (31) and the second connecting rod (32), wherein the first connecting rod (31) is located in front of the striking rod (24) and the second connecting rod (32) is located near the top of the housing (1), wherein the pulley system (3) further comprises a rope (35), one end of the rope (35) being connected to a counterweight (36), while the other end is successively guided through the second fixed pulley (34) and the first fixed pulley (33) and is attached to the end of the striking bar (24); a buffer assembly (6) comprising a support plate (61) whose two ends are each connected to the third plates (13), wherein a through hole (62) is provided in the center of the support plate (61) for guiding the cable (35) through it, and wherein several buffer bodies (63) are arranged below the support plate (61) distributed around the through hole (62); and a power generating device (4) that receives the energy transmitted by the striking rod (24) and converts it into electrical energy; wherein a wave enters the housing (1) through the inlet (111) and strikes the wave impact plate (23), causing the wave impact plate (23) to perform a lever movement around the support shaft (21) and rotate forward into a horizontal position, while the impact rod (24) simultaneously pivots backward into a vertical position, wherein the force arm of the impact rod (24) is longer than that of the wave impact plate (23), which increases the speed of movement of the striking rod (24), so that the striking rod (24) has a longer stroke, wherein the striking rod (24) pivots backward and pulls the rope (35), thereby raising the counterweight (36) located at the other end, wherein when the counterweight (36) is raised and touches the multiple buffer bodies (63), these provide shock absorption, wherein once the shaft has completed its stroke, the counterweight (36) pulls the rope (35) downward due to gravity, thereby retracting the striking rod (24) from the vertical to the horizontal position, while the shaft impact plate (23) moves back from the horizontal to the vertical position synchronously with the striking rod (24).

The application discloses a positive buoyancy profile float based on a wave energy power generation device and belongs to the technical field of marine observation equipment. The positive buoyancy profile float comprises a flow guide cover, a main sealed cabin, a passive variable buoyancy sealed cabin and an immersed tail cabin, and is completely immersed to present positive buoyancy. The flow guide cover is a streamlined hollow shell body, integrates a communication module and a temperature-salinity-depth sensor, and is connected with the main sealed cabin through a through-cabin piece; the main sealed cabin is divided into a wave power generation cabin and a control cabin by a cabin plate with holes, and is uniformly and stably provided with fin plates outside; the passive variable buoyancy sealed cabin is internally provided with a piston, a compression spring and a limiting block, and the piston adjusts the buoyancy according to water depth pressure; the immersed tail cabin is provided with water inlet holes, and is internally provided with a corrosion-resistant open water motor and an asymmetric double-blade propeller, and realizes vector propulsion through periodical variable speed. When working, the water surface generates electricity through wave heaving and stores energy, when diving, the motor drives the propeller and the piston is compressed to reduce energy consumption, when rising, the motor is stopped and the piston releases the buoyancy, and data is collected throughout the whole process. The application is self-provided with wave energy, has simple structure and high diving efficiency, and is suitable for long-term observation of marine profile data.

This invention provides a porous wave-damping plate for aquaculture cages, specifically belonging to the field of wave-damping technology for aquaculture cages. It comprises a porous plate, wave-damping buoys, and a hollow cavity structure, forming a highly efficient energy dissipation system. The alternating openings on the surface of the porous plate allow waves to pass through. When waves impact the plate, seawater enters the hollow cavity and drives the internal wave-damping buoys to generate minute movements and collisions, thereby significantly reducing wave height and impact force. This directly protects the fish in the cage from the impact of violent water currents. The invention includes a plate body, which is detachably and fixedly installed on the outside of the cage. The plate body is a hollow plate-like structure with through holes on both the front and back sides, and the cavity of the hollow plate-like structure is filled with several wave-damping buoys for dissipating wave energy. It includes multiple plate bodies, which are spliced ​​together to form a wave-damping plate assembly. The upper end of the plate body is provided with a tenon, and the lower end of the plate body is provided with a mortise. Adjacent plates are interlocked and positioned by the tenon and mortise.

This invention provides a circular caisson resonant pool combination structure, comprising an upper circular caisson, a lower circular caisson, and a resonant pool. The upper and lower circular caissons are stacked, with the resonant pool positioned on their rear sides. The wave-facing sides of both the upper and lower circular caissons are arc-shaped curved surfaces, and the top-view outline of the upper caisson overlaps that of the lower caisson. Along the wave-facing direction, the upper and lower circular caissons are staggered with the resonant pool. This invention, through its two-layer stacked circular caisson and resonant pool combination structure, achieves superior stress performance, reduces wave reflection, and significantly weakens wave energy accumulation through scattering, maintaining a stable harbor surface. Addressing the strong penetrating characteristics of medium- and long-period waves, the resonant pool allows the internal fluid to approach a resonant state, utilizing fluid viscosity and vortex structures to dissipate wave energy, further enhancing the wave-damping effect.

The application discloses a kind of multi-source ocean energy site selection method and system, it is related to electric power energy field, it solves the problem that existing multi-source ocean energy site selection method exists poor site selection effect, including steps S1: real-time tidal energy index monitoring is carried out to the region to be addressed, the monitoring result is combined with tidal energy index historical data, and the tidal energy estimated power generation deviation corresponding to the region to be addressed is obtained by comprehensive analysis, tidal energy resource monitoring data are obtained, step S2: tidal resource development area screening is carried out to the region to be addressed according to tidal energy resource monitoring data, and wave energy index analysis is carried out to non-tidal resource development area, and regional energy analysis data are obtained according to the analysis result, step S3: according to regional energy analysis data, the site selection of each region to be addressed is carried out to marine energy resource development, the comprehensiveness and accuracy of the application can be improved multi-source ocean energy site selection method.

A power take-off device for use in a wave energy converter unit has a power take-off hull connectable to a mooring device and connected to or connectable to the buoy, and a power extracting device connected to the power take-off hull. The power extracting device is adapted to extract power as the buoy moves with the waves, by applying a control force within a predetermined range. The power take-off hull has a first shell movable relatively to a second shell, and the first and second shells together define an inner volume. A seal is provided to separate the inner volume from water outside of the power take-off hull, and the differential pressure between water surrounding the power take-off hull and the inner volume provides a nearly constant pre-tension force from the first and second shells being pushed together by surrounding water pressure.