A hydraulic wave energy device primary energy capture test system and method

Abstract

The present application relates to a kind of hydraulic wave energy device primary energy capture test system and test method, belong to wave energy generation device measurement technical field, including data acquisition unit, for wave making wave making unit, for capturing wave energy wave energy capture unit, load measuring unit, for the energy transmission of the wave energy capture unit captured to the load measuring unit hydraulic transmission unit and water storage recovery unit;The present application can directly capture the hydraulic energy converted by wave energy capture device through the cooperation of each unit, eliminate the energy loss of intermediate transmission link, clever structure, easy operation, and test parameter can be accurately collected, guarantee the reliability and accuracy of test result.

Description

Technical Field

[0001] This invention belongs to the field of wave energy power generation device measurement technology, and specifically relates to a hydraulic wave energy device primary energy harvesting test system and test method. Background Technology

[0002] Wave energy, as a clean and renewable marine energy source, is of great significance for alleviating the energy crisis and reducing environmental pollution. Wave energy power generation devices typically consist of an energy harvesting mechanism, a transmission device, an energy storage device, and a power generation unit. Their overall power generation efficiency is determined by the synergistic efficiency of three energy conversion stages: The first stage is the wave energy harvesting stage, where a hydraulic wave energy device compresses liquid in a closed space to convert the kinetic and potential energy of waves into hydraulic energy. This is the source of energy acquisition for the entire power generation system, and its performance directly determines the lower limit of subsequent energy conversion. The second stage is the intermediate conversion stage, responsible for converting the harvested hydraulic energy into an energy form (such as mechanical energy or electrical energy) that matches the power generation system. The third stage is the power generation stage, which generally uses a conventional rotary generator to complete the final electrical energy output. To achieve the optimal design of the overall power generation efficiency of wave energy power generation devices, the three energy conversion stages need to undergo precise testing during the scheme demonstration and design optimization stages, using quantitative data to match the optimal structural parameters and system configuration. Among them, the primary energy capture stage, as the first gate of energy input, has its capture efficiency, energy conversion stability, and adaptability to different wave conditions as the core indicators that determine the rationality of the entire power generation device design.

[0003] Currently, existing wave energy power generation device energy testing technologies mostly focus on overall system efficiency testing, with a lack of specialized testing systems and methods for the first-stage energy capture stage. Some laboratory testing schemes have the following shortcomings: First, the testing system structure is complex and cumbersome to operate, making it difficult to adapt to the rapid testing needs of multiple parameters and operating conditions during the scheme demonstration phase; second, the accuracy of energy capture calculation is insufficient, relying heavily on indirect measurement parameter derivation, which is easily affected by energy loss in intermediate transmission links and cannot accurately reflect the true performance of first-stage energy capture; third, the ability to accurately quantify and evaluate the capture width ratio under different wave conditions (regular waves, irregular waves) is insufficient, making it difficult to provide accurate data support for the wave-facing structure design and operating condition adaptation optimization of the device.

[0004] Therefore, there is an urgent need for a simple, accurate, and adaptable testing system and method for the first-stage energy capture performance of hydraulic wave energy power generation devices, which can solve the problems of low testing efficiency, insufficient data accuracy, and poor adaptability to operating conditions in existing technologies. This system can complete the quantitative evaluation of the first-stage energy capture performance in the laboratory stage, providing a reliable basis for the matching design of subsequent transmission devices, energy storage devices, and power generation equipment. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a hydraulic wave energy device primary energy harvesting test system and method, thereby improving test accuracy and efficiency.

[0006] To achieve the above objectives, the present invention provides the following solution: A hydraulic wave energy device primary energy harvesting test system includes a data acquisition unit, a wave generating unit for generating waves, a wave energy harvesting unit for harvesting wave energy, a load measurement unit, a hydraulic transmission unit for transmitting the energy harvested by the wave energy harvesting unit to the load measurement unit, and a water storage and recovery unit. The load measuring unit includes a hydraulic cylinder, a load frame connected to a piston valve of the hydraulic cylinder, a counterweight block for placing on the load frame, a displacement sensor for monitoring the displacement of the load frame, and a weighing sensor for monitoring the weight of the water in the water storage and recovery unit. The data acquisition unit is linked with the displacement sensor, the weighing sensor and the wave generation unit to collect displacement data, mass data, wave parameters and test duration in real time, and automatically record and store the data.

[0007] Preferably, the displacement sensor is aligned with the top of the load rack, and the weight sensor is located at the bottom of the water storage and recycling unit.

[0008] Preferably, an overflow port is provided in a designated area on the top of the hydraulic cylinder, and the overflow port is connected to the water storage and recovery unit through a first water inlet pipe.

[0009] Preferably, the bottom of the hydraulic cylinder is provided with a drain port and a water inlet.

[0010] Preferably, the wave energy harvesting unit includes a fixing member, a wave energy harvesting device hinged to the fixing member, a hydraulic chamber, a hydraulic rod with one end hinged to the wave energy harvesting device and the other end connected to the hydraulic chamber, a second water inlet pipe for pumping water provided on the hydraulic chamber, and a third water inlet pipe for connecting the hydraulic chamber and the hydraulic cylinder, wherein the third water inlet pipe is connected to the water inlet.

[0011] Preferably, the fixing member includes a fixing rod partially inserted below the water surface and a bearing disposed on the fixing rod, and the wave energy harvesting device is hinged to the bearing.

[0012] Preferably, one-way valves are provided on the first water inlet pipe, the second water inlet pipe, and the third water inlet pipe.

[0013] Preferably, the water storage and recycling unit includes a water storage tank.

[0014] A method for primary energy harvesting testing of a hydraulic wave energy device includes the following steps: Step 1: Check the sealing and linkage of the test system; according to the test requirements, mount n load blocks on the load rack, with masses m1, m2, ... m n Record the weight of the load rack itself, m0, and the total load mass, m0 + m1 + m2 + ... + m n Adjust the wave generator parameters, set the simulated wave parameters and test duration t; Step 2: Start the wave-generating unit to generate waves with set parameters. When the wave energy harvesting device swings downward, the water intake action is completed; when the wave energy harvesting device swings upward, the hydraulic energy transfer is completed. Step 3: The piston valve moves upward, causing the load frame and the load block above it to move upward synchronously; the displacement sensor collects the moving distance of the load frame in real time and records it as h1, and records the test duration of this process simultaneously; Step 4: The wave energy harvesting device continues to oscillate back and forth, continuously pumping water into the hydraulic cylinder through the hydraulic rod, pushing the load frame to rise continuously; Step 5: If, before the waves stop, excess water in the hydraulic cylinder flows into the water storage tank through the overflow outlet; the mass of the water in the storage tank at this time is the mass m of the water overflowing from the overflow outlet. 溢 ; Step Six: After the set test duration t is reached, the equipment stops operating; the remaining water in the hydraulic cylinder is drained into the water storage tank; the total mass of water in the storage tank at this time is measured, and the mass measured in Step Five is subtracted to obtain the mass m of the water drained from the hydraulic cylinder into the water storage tank. 排 Simultaneously record the total mass m measured by the weighing sensor at this time. 溢' ; Step 7: Organize the test data and calculate the first-level energy capture power, wave input power density, and capture width to capture width ratio.

[0015] Preferably, the first-stage energy capture power is calculated as follows: The core parameters are defined as follows: m0: Weight of the load cell itself; m1, m2...m n Mass of each load block, total load mass; m 溢 The mass of the water overflowing from the overflow outlet, i.e., the mass measured by the weighing sensor before the hydraulic measuring structure drains water; m 排 The mass of water discharged from the hydraulic measuring structure into the water tank after the test is stopped; m 溢' The total mass measured by the weighing sensor after water is drained from the hydraulic measuring structure into the water tank. h0: The distance from the water surface to the bottom of the hydraulic test structure and the bottom of the water tank; h1: The displacement value measured by laser displacement, that is, the vertical movement distance of the load frame and the load block under the action of waves; h2: Distance from the water surface to the drain outlet; t: Test duration; ρ: density of water; g: acceleration due to gravity; H: Regular wave height; T: Regular wave period; H s : Irregular wave significant wave height; Irregular wave average period; P in Input power density per unit width of wave; First-level energy capture power calculation The first-level energy capture power is the ratio of the total work done by the hydraulic system during the test to the test duration. The total work includes the mechanical work of pushing the load frame and load block upward and the work done by gravity of the water flow. The calculation formula is as follows: Level 1 energy capture power: Wave input power density calculation: Based on the wave type simulated by the wave generator, the corresponding formulas are used to calculate the wave input power density per unit width: Input power density of a regular wave: Input power density of irregular waves: .

[0016] The present invention achieves the following technical effects compared to the prior art: 1. This invention, through the coordinated operation of its various units, can directly capture the hydraulic energy converted by the wave energy harvesting device, eliminating energy loss in the intermediate transmission links. It has an ingenious structure, is easy to operate, and allows for precise acquisition of test parameters, ensuring the reliability and accuracy of test results.

[0017] Other technical solutions disclosed in this invention also have the following technical advantages: 2. It is compatible with various wave conditions such as regular waves and irregular waves, and the load parameters can be flexibly adjusted to meet the comparative test requirements under different design schemes and structural parameters.

[0018] 3. By simplifying the test system structure and optimizing the test process, the operational difficulty and cost of laboratory testing are reduced, test efficiency is improved, and rapid iteration and optimization of design solutions are facilitated.

[0019] 4. Provide accurate primary energy capture performance data to match suitable transmission devices, energy storage devices and power generation equipment for hydraulic wave energy power generation devices, and ensure that the overall power generation efficiency of the whole machine reaches the optimal level. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a diagram illustrating the relevant parameters of the present invention; The components include: 1. Wave energy harvesting device; 2. Hydraulic rod; 3. Third inlet pipe; 4. Third check valve; 5. Inlet; 6. Displacement sensor; 7. Load frame; 8. Overflow port; 9. First check valve; 10. Hydraulic cylinder; 11. Water storage tank; 12. Weight sensor; 13. Liquid inlet; 14. Bearing; 15. Second inlet pipe; 16. Second check valve; 17. Load block; 18. Drain port; and 19. Gate valve. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] This invention provides a hydraulic wave energy device primary energy capture test system and test method, which aims to improve test accuracy and test efficiency.

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] refer to Figure 1A hydraulic wave energy harvesting device primary energy capture testing system includes a data acquisition unit, a wave generating unit for wave generation, a wave energy harvesting unit for capturing wave energy, a load measurement unit, a hydraulic transmission unit for transmitting the energy harvested by the wave energy harvesting unit to the load measurement unit, and a water storage and recovery unit. The load measurement unit includes a hydraulic cylinder 10, a load frame 7 connected to a piston valve of the hydraulic cylinder 10, a counterweight for placing on the load frame 7, a displacement sensor 6 for monitoring the displacement of the load frame 7, and a weight sensor 12 for monitoring the weight of water in the water storage and recovery unit. The data acquisition unit is linked with the displacement sensor 6, the weight sensor 12, and the wave generating unit to collect displacement data, mass data, wave parameters, and test duration in real time, and automatically record and store the data. Specifically, the hydraulic cylinder 10 adopts a sealed hydraulic cylinder structure, with an internal piston valve connected to the load frame 7. The system monitors the movement distance of the piston valve and the hydraulic cylinder... The water level change and flow quality within the 10-cell hydraulic cylinder indirectly deduce the hydraulic energy. Its smooth inner wall reduces interference from piston movement resistance during testing. The load frame 7 is rigidly connected to the piston valve of the hydraulic cylinder 10, allowing it to move vertically under hydraulic pressure. The load block 17 is a standard counterweight, and its quantity can be increased or decreased according to testing requirements to simulate energy output under different load conditions, enabling multi-condition testing. The displacement sensor 6, a core component of the data acquisition unit, is fixed above the test bench, aligned with the top of the load frame 7, and initialized to zero. It can measure the vertical movement distance of the load frame 7 in real time with precision (accuracy up to ±0.01mm), providing displacement parameters for energy calculation. This invention, through the coordinated operation of each unit, can directly capture the hydraulic energy converted by the wave energy harvesting device 1, eliminating energy loss in intermediate transmission links. Its ingenious structure, simple operation, and precise acquisition of test parameters ensure the reliability and accuracy of test results.

[0026] refer to Figure 1 The weighing sensor 12 is located at the bottom of the water storage and recycling unit and is a core component of the data acquisition unit. It has an accuracy of ±0.05kg and can measure the changes in water mass in the water storage tank 11 in real time, recording the mass of overflow water, the mass of discharged water and the total water volume, providing mass parameters for energy calculation.

[0027] refer to Figure 1 The bearing 14 provides rotational support for the wave energy harvesting device 1. The bearing 14 is made of low friction coefficient to reduce mechanical friction loss and ensure that wave energy is transmitted to the hydraulic rod 2 to the maximum extent, thereby reducing the impact of losses in non-energy harvesting links on the test results.

[0028] refer to Figure 1 An overflow port 8 is provided in the designated area at the top of the hydraulic cylinder 10. The overflow port 8 is connected to the water storage and recovery unit through the first water inlet pipe. When the water level in the hydraulic cylinder 10 is higher than this height, the excess water overflows through the overflow port 8, which avoids damage to the equipment due to excessive hydraulic pressure and realizes the quantitative collection of overflow water.

[0029] refer to Figure 1 The bottom of the hydraulic cylinder 10 is provided with a drain port 18 and a water inlet 5; the water inlet 5 is the water inlet end of the hydraulic cylinder 10 and is connected to the second water inlet pipe 15; furthermore, the hydraulic chamber is also provided with a liquid inlet 13, which is connected to the water storage tank 11 and is the water replenishment / return water inlet end of the water storage tank 11.

[0030] refer to Figure 1 The wave energy harvesting unit includes a fixing component, a wave energy harvesting device 1 hinged to the fixing component, a hydraulic chamber, a hydraulic rod 2 with one end hinged to the wave energy harvesting device 1 and the other end connected to the hydraulic chamber, a second water inlet pipe 15 for pumping water and a third water inlet pipe 3 for connecting the hydraulic chamber and the hydraulic cylinder 10, the third water inlet pipe 3 being connected to the water inlet 5.

[0031] refer to Figure 1 The fixing component includes a fixing rod that is partially inserted below the water surface and a bearing 14 mounted on the fixing rod. The wave energy harvesting device 1 is hinged to the bearing 14.

[0032] refer to Figure 1 One-way valves are installed on the first water inlet pipe, the second water inlet pipe 15 and the third water inlet pipe 3 respectively. The one-way valves on the first water inlet pipe, the second water inlet pipe 15 and the third water inlet pipe 3 are respectively defined as the first one-way valve 9, the second one-way valve 16 and the third one-way valve 4.

[0033] refer to Figure 1 The water storage and recycling unit includes a water storage tank 11. The water storage tank 11 is used to store overflow water and discharge water during the test process to realize water circulation. Its volume is adapted to the test duration and the displacement of the hydraulic rod 2 to ensure the complete collection of water during the test.

[0034] refer to Figures 1 to 2 A method for primary energy harvesting testing of a hydraulic wave energy device includes the following steps: Step 1: Test preparation phase. Check the sealing and linkage of each component of the test system to ensure that there is no leakage in hydraulic rod 2 and hydraulic cylinder 10, that the one-way valve operates flexibly, and that the sensor calibration is correct. According to the test requirements, load n load blocks 17 (with masses m1, m2, ... m) are mounted on the load frame 7. n Record the weight of the load rack 7 itself, m0, and the total load mass (m0+m1+m2+……+m). n Adjust the wave generator parameters, set the simulated wave type, wave height, wave period, and test duration t; zero out displacement sensor 6 and weight sensor 12. Step Two: The wave-generating unit is activated to generate waves with set parameters. When the waves are transmitted to the wave energy harvesting device 1, the device 1 oscillates back and forth. When the device 1 oscillates downwards, it stretches the hydraulic rod 2, creating a negative pressure in the hydraulic chamber. The second check valve 16 opens, and the third check valve 4 closes. Water from the test pool is drawn into the hydraulic chamber of the hydraulic rod 2 through the second inlet pipe 15 and the second check valve 16, completing the water intake process. When the wave energy harvesting device 1 oscillates upwards, it generates a thrust on the hydraulic rod 2, causing it to contract. This increases the pressure in the hydraulic chamber, closing the second check valve 16 and opening the third check valve 4. Under pressure, the water in the hydraulic chamber enters the hydraulic cylinder 10 of the hydraulic measuring structure through the third water inlet pipe 3 and the water inlet 5, thus completing the transmission of hydraulic energy. Step 3: The water flow entering the hydraulic cylinder 10 pushes the piston valve to move upward, thereby driving the load frame 7 and the load block 17 above to move upward synchronously; the displacement sensor 6 collects the moving distance of the load frame 7 in real time and records it as h1, and simultaneously records the test duration of this process; Step 4: As the wave-generating unit continues to generate waves, the wave energy harvesting device 1 maintains a reciprocating oscillation state, continuously pumping water into the hydraulic cylinder 10 through the hydraulic rod 2, pushing the load frame 7 to rise continuously, thereby achieving continuous energy harvesting and transmission. Step 5: If the piston valve in hydraulic cylinder 10 is higher than the set height of overflow port 8 before the wave stops, excess water in hydraulic cylinder 10 flows into water storage tank 11 through overflow port 8 and check valve; the mass of water in water storage tank 11 at this time is measured by weighing sensor 12, which is the mass m of the overflow water. 溢 ; Step Six: After the set test duration t is reached, stop the wave generator and the test system; open the gate valve 19 to discharge the remaining water in the hydraulic cylinder 10 into the water storage tank 11 through the drain port 18 and the inlet port 5; measure the total mass of water in the water storage tank 11 at this time using the weighing sensor 12, and subtract the mass measured in Step 5 to obtain the mass m of the water discharged from the hydraulic cylinder 10 into the water storage tank 11. 排 Simultaneously record the total mass m measured by the weighing sensor at this time. 溢' ; Step 7: Close gate valve 19 and compile the test data, including: total load mass, laser displacement value h1, and overflow water mass m. 溢 Discharge water quality m 排 The test duration t, the wave parameters simulated by the wave generator, the distance h0 from the water surface to the bottom of the hydraulic test structure and the bottom of the water tank 11, and the distance h2 from the water surface to the drain outlet were recorded and calculated to obtain the first-level energy capture power, wave input power density, and capture width to capture width ratio.

[0035] Furthermore, the first-order energy capture power is calculated as follows: The core parameters are defined as follows: m0: Weight of the load cell 7 itself (unit: kg) m1, m2...m n Mass of each load block 17 (unit: kg), total load mass m 溢 The mass of water overflowing from the overflow outlet (unit: kg) is the mass measured by the weighing sensor before the hydraulic measuring structure drains water. m 排 After the test is stopped, the mass of water discharged from the hydraulic measuring structure into the water storage tank 11 (unit: kg). m 溢' The total mass (unit: kg) measured by the weighing sensor after water is discharged from the hydraulic measuring structure into the water storage tank 11. h0: Distance from the water surface to the bottom of the hydraulic test structure and the bottom of the water tank 11 (unit: m); h1: Displacement value measured by laser displacement, i.e., the vertical movement distance of load frame 7 and load block 17 under wave action (unit: m). h2: Distance from the water surface to the drain outlet (unit: m); t: Test duration (unit: seconds); ρ: Density of water (unit: kg / m³) 3 (Take the standard value of 1000 kg / m) 3 g: acceleration due to gravity (unit: m / s²) 2 (The standard value is taken as 9.8 m / s) 2 ; H: Height of regular wave (unit: m); T: Period of regular wave (unit: s); H s : Irregular wave significant height (unit: m); : Irregular wave average period (unit: s); Pout: First-level energy capture output power (unit: W); Pin: Wave input power density per unit width (unit: W / m); C: Capture width (unit: m); Wave-facing width (unit: m), which is the effective width of the wave-facing surface of wave energy harvesting device 1; : Capture width ratio (dimensionless); First-level energy capture power calculation The first-level energy capture power is the ratio of the total work done by the hydraulic system during the test to the test duration. The total work includes the mechanical work of pushing the load frame 7 and load block 17 upward and the work done by gravity of the water flow. The calculation formula is as follows: Level 1 energy capture power: Wave input power density calculation: Based on the wave type simulated by the wave generator, the corresponding formulas are used to calculate the wave input power density per unit width: Input power density of a regular wave: Input power density of irregular waves: Calculation of capture width and capture width ratio: Capture Width Calculation: Capture width is a core indicator for measuring the energy capture capability of a wave energy device. It represents the width of waves from which the device actually captures energy, equivalent to the energy transmitted by those waves. The calculation formula is as follows: Capture Width Ratio Calculation: The capture width ratio is the ratio of the capture width to the wave-facing width. It is used to quantify the energy capture efficiency of the device per unit wave-facing width and is a key indicator for scheme optimization and performance comparison. The calculation formula is as follows: .

[0036] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0037] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hydraulic wave energy device primary energy harvesting test system, characterized in that, It includes a data acquisition unit, a wave generation unit for generating waves, a wave energy harvesting unit for capturing wave energy, a load measurement unit, a hydraulic transmission unit for transmitting the energy captured by the wave energy harvesting unit to the load measurement unit, and a water storage and recovery unit. The load measuring unit includes a hydraulic cylinder, a load frame connected to a piston valve of the hydraulic cylinder, a counterweight block for placing on the load frame, a displacement sensor for monitoring the displacement of the load frame, and a weighing sensor for monitoring the weight of the water in the water storage and recovery unit. The data acquisition unit is linked with the displacement sensor, the weighing sensor and the wave generation unit to collect displacement data, mass data, wave parameters and test duration in real time, and automatically record and store the data.

2. The hydraulic wave energy device primary energy harvesting test system according to claim 1, characterized in that, The displacement sensor is aligned with the top of the load rack, and the weight sensor is located at the bottom of the water storage and recycling unit.

3. The hydraulic wave energy device primary energy harvesting test system according to claim 2, characterized in that, An overflow port is provided in a designated area on the top of the hydraulic cylinder, and the overflow port is connected to the water storage and recovery unit through a first water inlet pipe.

4. The hydraulic wave energy device primary energy harvesting test system according to claim 3, characterized in that, The bottom of the hydraulic cylinder is provided with a drain port and a water inlet.

5. The hydraulic wave energy device primary energy harvesting test system according to claim 4, characterized in that, The wave energy harvesting unit includes a fixing member, a wave energy harvesting device hinged to the fixing member, a hydraulic chamber, a hydraulic rod with one end hinged to the wave energy harvesting device and the other end connected to the hydraulic chamber, a second water inlet pipe for pumping water on the hydraulic chamber, and a third water inlet pipe for connecting the hydraulic chamber and the hydraulic cylinder, the third water inlet pipe being connected to the water inlet.

6. The hydraulic wave energy device primary energy harvesting test system according to claim 5, characterized in that, The fixing component includes a fixing rod partially inserted below the water surface and a bearing mounted on the fixing rod, with the wave energy harvesting device hinged to the bearing.

7. The hydraulic wave energy device primary energy harvesting test system according to claim 6, characterized in that, One-way valves are installed on the first, second, and third water inlet pipes.

8. The hydraulic wave energy device primary energy harvesting test system according to claim 1, characterized in that, The water storage and recycling unit includes a water storage tank.

9. A method for primary energy harvesting testing of a hydraulic wave energy device, characterized in that, The application of the hydraulic wave energy device primary energy harvesting test system according to any one of claims 1 to 8 includes the following steps: Step 1: Check the sealing and linkage of the test system; according to the test requirements, mount n load blocks on the load rack, with masses m1, m2, ... m n Record the weight of the load rack itself, m0, and the total load mass, m0 + m1 + m2 + ... + m n Adjust the wave generator parameters, set the simulated wave parameters and test duration t; Step 2: Start the wave-generating unit to generate waves with set parameters. When the wave energy harvesting device swings downward, the water intake action is completed; when the wave energy harvesting device swings upward, the hydraulic energy transfer is completed. Step 3: The piston valve moves upward, causing the load frame and the load block above it to move upward synchronously; the displacement sensor collects the moving distance of the load frame in real time and records it as h1, and records the test duration of this process simultaneously; Step 4: The wave energy harvesting device continues to oscillate back and forth, continuously pumping water into the hydraulic cylinder through the hydraulic rod, pushing the load frame to rise continuously; Step 5: If, before the waves stop, excess water in the hydraulic cylinder flows into the water storage tank through the overflow outlet; the mass of the water in the storage tank at this time is the mass m of the water overflowing from the overflow outlet. 溢 ; Step Six: After the set test duration t is reached, the equipment stops operating; the remaining water in the hydraulic cylinder is drained into the water storage tank; the total mass of water in the storage tank at this time is measured, and the mass measured in Step Five is subtracted to obtain the mass m of the water drained from the hydraulic cylinder into the water storage tank. 排 Simultaneously record the total mass m measured by the weighing sensor at this time. 溢' ; Step 7: Organize the test data and calculate the first-level energy capture power, wave input power density, and capture width to capture width ratio.

10. The first-stage energy harvesting test method for the hydraulic wave energy device according to claim 9, characterized in that, The first-order energy capture power is calculated as follows: The core parameters are defined as follows: m0: Weight of the load cell itself; m1, m2...m n Mass of each load block, total load mass; m 溢 The mass of the water overflowing from the overflow outlet, i.e., the mass measured by the weighing sensor before the hydraulic measuring structure drains water; m 排 The mass of water discharged from the hydraulic measuring structure into the water tank after the test is stopped; m 溢' The total mass measured by the weighing sensor after water is drained from the hydraulic measuring structure into the water tank. h0: The distance from the water surface to the bottom of the hydraulic test structure and the bottom of the water tank; h1: The displacement value measured by laser displacement, that is, the vertical movement distance of the load frame and the load block under the action of waves; h2: Distance from the water surface to the overflow outlet; t: Test duration; ρ: density of water; g: acceleration due to gravity; H: Regular wave height; T: Regular wave period; H s : Irregular wave significant wave height; Irregular wave average period; P in Input power density per unit width of wave; First-level energy capture power calculation The first-level energy capture power is the ratio of the total work done by the hydraulic system during the test to the test duration. The total work includes the mechanical work of pushing the load frame and load block upward and the work done by gravity of the water flow. The calculation formula is as follows: Level 1 energy capture power: Wave input power density calculation: Based on the wave type simulated by the wave generator, the corresponding formulas are used to calculate the wave input power density per unit width: Input power density of a regular wave: Input power density of irregular waves: 。

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