Self-calibration water depth-water flow-wave test water tank device and test method

Abstract

The invention discloses a self-calibration water depth-water flow-wave test water tank device and a test method. The device mainly comprises a water tank, a water pump, a lifting platform and a wave maker, the method comprises the following steps: acquiring initial water depth and water flow velocity in a water tank, measuring water depth from the water surface to the upper end surface of a lifting platform, and adjusting the height of the lifting platform to enable the measured water depth to reach the water depth required by a test; measuring the adjusted water flow velocity of the lifting platform, and adjusting the flow of the water pump until the measured water flow velocity reaches the water flow velocity required by the test; and the control system carries out primary correction and secondary correction on the wave generation control signal in combination with the water flow speed to obtain a wave period parameter and a wave height parameter so as to complete automatic calibration of water depth-water flow-wave. The problems that in a traditional wave water channel test, the test efficiency is low, the water depth and the water flow are prone to errors, and deviation is generated due to wave height deformation caused by the influence of the water flow on wave propagation are solved. And the automation degree, efficiency and accuracy of the test are improved.

Description

Technical Field

[0001] The invention relates to the technical field of automatic calibration test, and in particular to a test water tank device and a test method for self-calibrating water depth, water flow and waves. Background Art

[0002] Traditional wave and water flow test flumes usually use a fixed flume bottom elevation. In order to meet the water depth, water flow and wave conditions required for the calibration test, water is first released to the test water depth, and then the required water flow velocity is calibrated by adjusting the water pump. Then, the wave-making parameters are input through the computer to simulate the required waves. However, there are still problems when using the above-mentioned traditional test flumes for calibration. On the one hand, the flow-generating device in the test flume will cause the water level at the test position to rise or fall (depending on the operation mode of the water pump and the direction of the water flow, such as the flow will be lowered by pumping, and it will be raised by drainage), resulting in an error between the water depth under the actual water flow conditions and the required water depth. At this time, if the water depth is continued to be adjusted by adding or subtracting water, the change in the flow area will cause the deviation of the flow velocity, so it is difficult to meet the water depth and flow velocity conditions at the same time; on the other hand, when there is water flow and the wave-making parameters are input into the computer, the actual wave shape is very different from that when there is no water flow. When the wave and the water flow are in the same direction, the wave height decreases and the wavelength increases. When the wave and the water flow are in the opposite direction, the wave height increases and the wavelength decreases. Therefore, after adjusting the water flow, using the traditional method to input the wave-making parameters into the computer will cause a deviation between the actual simulated waves and the desired waves.

[0003] Therefore, we designed a self-calibrated water depth-current-wave test flume device and test method to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art that the water level in the test water tank is difficult to control, the water level is prone to high or low, resulting in an error between the water depth under actual water flow conditions and the required water depth, and a deviation between the actual simulated waves and the required waves. A self-calibrated water depth-water flow-wave test water tank device and test method are proposed, the purpose of which is to optimize the test method, improve the controllability and accuracy of the test, and reduce the error of the test data obtained during the test.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A self-rated water depth-current-wave test method comprises the following steps:

[0007] Step 1, fill the water tank to the required water depth for the test;

[0008] Step 2, the control system controls the number of water pumps turned on according to the water depth and water flow rate required for the input test;

[0009] Step 3: Use the monitoring mechanism to measure the water depth from the water surface to the upper end of the lifting platform, transmit the measured data to the control system, and adjust the height of the lifting platform so that the measured water depth reaches the water depth required for the test;

[0010] Step 4, using the monitoring mechanism to measure the water flow velocity after the lifting platform is adjusted, transmitting the measured data to the control system, and adjusting the flow rate of the water pump until the measured water flow velocity reaches the water flow velocity required for the test;

[0011] Step 5, inputting the data parameters of the waves required for the test into the control system, and the control system corrects the wave-making control signal once in combination with the water flow velocity to obtain the corrected wave parameters;

[0012] Step 6, performing a secondary correction on the wave making control signal, the control system determines the wave parameters after the primary correction, determines the required slope, corrects the slope, and determines the wave breaking parameters;

[0013] Step 7, the control system inputs the first-corrected wave period parameters and the second-corrected wave height parameters into the wave maker to complete the automatic calibration of water depth-current-wave.

[0014] As a further preferred embodiment of the present invention, in step 1, water is released into the water tank to the required water depth for the test under the condition that there is no water flow and no waves in the water tank, and the required water depth for the test refers to the water depth from the water surface to the upper end surface of the lifting platform.

[0015] As a further preferred solution of the present invention, in step 2, the control system controls the number of water pumps turned on according to the water depth and water flow rate required for the input test. The water flow rate is the average vertical flow rate measured by the monitoring mechanism. The number of water pumps turned on is determined by the following formula:

[0016] n=B*V*h (1)

[0017] Where n is the number of water pumps turned on, B is the width of the water tank, V is the water flow velocity, and h is the water depth required for the test.

[0018] As a further preferred scheme of the present invention, in step 3, after the water flow in the water tank stabilizes, the water depth from the water surface to the upper end surface of the lifting platform is measured using a water level gauge of the monitoring mechanism, and the measurement data is transmitted to the control system. If the actual measured water depth is less than the required water depth for the test, the height of the lifting platform is lowered; if the actual measured water depth is greater than the required water depth for the test, the height of the lifting platform is raised so that the measured water depth reaches the required water depth for the test.

[0019] As a further preferred embodiment of the present invention, in step 5, data parameters of the waves required for the test are input into the control system, and the control system combines the water flow velocity and uses the following formula to perform a primary correction on the wave-making control signal:

[0020]

[0021] T1 = 1.2T (3)

[0022]

[0023] In the above formula, H represents the wave height required for the test, T represents the wave period required for the test, H1 represents the wave height parameter input into the control system after the primary correction when the waves and the water flow act together, T1 represents the wave period parameter input into the control system after the primary correction when the waves and the water flow act together, s represents the relative wave velocity parameter, μ represents the wave velocity under the condition of no water flow, L represents the wavelength at the lifting platform under the condition of no water flow, and g represents the acceleration due to gravity.

[0024] As a further preferred embodiment of the present invention, in step 6, a secondary correction is performed on the wave-making control signal. The control system determines the required slope for the wave parameters after the primary correction, corrects the slope, and determines the wave breaking parameters, including the following:

[0025] When H1 ≤ 0.55h, the slope m of the lifting platform is 1:20, and the secondary correction is performed according to this slope, as shown in the following formula:

[0026] H2 = H1 / k (6)

[0027]

[0028] In the above formula, k represents the slope correction coefficient, L0 represents the deep-water wavelength under the condition of no water flow, and H2 represents the wave height parameter input into the control system after the secondary correction when the waves and the water flow act together;

[0029] When H1 > 0.55h, in combination with the slope correction coefficient k, the slope m is adjusted, and the value of the slope m is determined by the wave breaking parameter K b determined;

[0030] Collect the wave height H required under different test conditions, the wave period T required for the test, and the water depth h required for the test, and fit to obtain the calculation formula of the breaking parameter K b of:

[0031]

[0032] When K b < H / L, the slope m is decreased. When K bWhen ≥H / L, the current slope m is used to correct the completed slope.

[0033] A test water tank device using a self-rated water depth-water flow-wave test method comprises a water tank, a water pump and a wave maker. The water pump is arranged at one end of the water tank, a water inlet and outlet are arranged at the other end of the water tank, the wave maker is arranged at a side of the water inlet and outlet away from the middle of the water tank, a lifting platform is arranged in the middle of the water tank, a hydraulic rod for adjusting the lifting is arranged at the lower part of the lifting platform, and the lifting platform comprises a slope and a platform. The slope is a hypotenuse triangle structure, which is located on a side close to the wave maker, and the platform is a rectangular parallelepiped structure, which is located on a side away from the wave maker. The slope has a slope range of 1:100 to 1:5, and the top of the slope is flush with the table surface of the platform. A monitoring mechanism is arranged at the junction of the slope and the platform, and the monitoring mechanism comprises a water level meter, a current meter and a wave height meter. The monitoring mechanism establishes a data transmission connection with a control system.

[0034] As a further preferred solution of the present invention, wave-breaking slopes for breaking waves are arranged at the front and rear ends of the water tank body, the wave maker is a push-plate wave maker, the width of the wave-making plate of the wave maker is consistent with the width of the water tank, and the height of the wave-making plate does not exceed three quarters of the height of the water tank body.

[0035] As a further preferred solution of the present invention, the water pump is a bidirectional water pump, and several of them are arranged side by side along the width direction of the water trough. One end of the water pump is connected to the inside of the water trough, and the other end is connected to a reservoir containing test water, and the water inlet and outlet are connected to the reservoir.

[0036] As a further preferred solution of the present invention, the length of the lifting platform is one fifth of the length of the water tank, and the width of the lifting platform is consistent with the inner width of the water tank.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention sets a lifting platform in the middle of the water tank, uses a monitoring mechanism to monitor the working conditions of the upper test section of the lifting platform in real time, and interconnects and feedbacks the monitoring mechanism, the controller of the water pump and the wave maker with the control system in real time, adjusts the water depth and water flow speed in the water tank, ensures that the actual water depth and water flow speed in the water tank are consistent with the water depth and water flow speed required for the test, and solves the problem of water depth error caused by high or low water level in the traditional wave and flow tank test. By correcting the waves twice and judging the breaking, the required wave parameters are obtained by self-calibration, which solves the problem of deviation caused by wave height deformation caused by the influence of water flow on wave propagation in the traditional wave and flow tank test. The water level is quickly changed by the lifting platform, which solves the problem of slow water addition and discharge speed and low test efficiency in the test. By using the shallow water characteristics of waves and setting a slope at the front end of the lifting platform, the problem of the performance limitation of the wave maker is solved, and the simulation accuracy of large wave height waves is improved. The water depth-current-wave self-calibration and self-correction method of the present invention solves the problems of low automation of wave and current calibration and large manual calibration errors in traditional flume tests, and greatly improves the efficiency and accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Schematic diagram of the process flow of the self-determined water depth-water current-wave test method in the embodiment;

[0039] Figure 2 It is a schematic diagram showing the change of the breaking parameter in the self-calibrated water depth-water current-wave test method in the embodiment with the ratio of the water depth required for the test to the deep water wavelength under the condition of no water current;

[0040] Figure 3 Schematic diagram of the variation of the breaking parameters with the slope in the self-rate water depth-water current-wave test method in the embodiment;

[0041] Figure 4 It is a schematic diagram of comparison between theoretical calculated values ​​of breaking parameters and experimentally obtained values ​​in the self-rate water depth-current-wave test method in the embodiment;

[0042] Figure 5 A top view of a test water tank device used in the self-rate water depth-water current-wave test method in the embodiment;

[0043] Figure 6 2 is a side view of a test water tank device used in the self-calibrated water depth-water current-wave test method in an embodiment.

[0044] The numbers in the figure are: 1. water tank; 2. water pump; 3. water inlet and outlet; 4. wave maker; 5. lifting platform; 51. slope; 52. platform; 6. monitoring mechanism; 7. wave-breaking slope; 8. reservoir. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0046] A self-regulating water depth-current-wave test method, the process of which is based on Figure 1 , the method comprises the following steps:

[0047] Step 1, fill the water tank 1 with water to the required water depth for the test; filling the water tank 1 with water to the required water depth for the test is done under the condition that there is no water flow and no waves in the water tank 1 to obtain the initial water depth. The water depth required for the test refers to the water depth from the water surface to the upper end surface of the lifting platform 5.

[0048] Step 2: The control system controls the number of water pumps 2 opened and the flow rate of each water pump 2 according to the water depth and water flow rate required for the input test. The water flow rate is the vertical average flow rate measured by the monitoring mechanism 6. The initial water flow rate is obtained, and the number of water pumps 2 opened is determined by the following formula:

[0049] n=B*V*h (1)

[0050] Where n is the number of water pumps turned on, B is the width of the water tank, V is the water flow velocity, and h is the water depth required for the test.

[0051] Step 3, use the water level gauge of the monitoring mechanism 6 to measure the water depth from the water surface to the upper end surface of the lifting platform 5, transmit the measured data to the control system, adjust the height of the lifting platform 5, so that the measured water depth reaches the water depth required for the test (i.e., the target water depth), otherwise readjust the elevation of the lifting platform 5.

[0052] Specifically, when the water flow in the water tank 1 is stable, the water level gauge of the monitoring mechanism 6 is used to measure the water depth from the water surface to the upper end surface of the lifting platform 5, and the measurement data is transmitted to the control system. If the actual water depth measured is less than the water depth required for the test, the height of the lifting platform 5 is lowered by the hydraulic rod. If the actual water depth measured is greater than the water depth required for the test, the height of the lifting platform 5 is raised by the hydraulic rod so that the measured water depth reaches the water depth required for the test.

[0053] Step 4, the water flow velocity changes caused by the height adjustment of the lifting platform 5, and the water flow velocity after adjustment of the lifting platform 5 is measured by the flow meter of the monitoring mechanism 6, and the measured water flow velocity data is transmitted to the control system in real time. According to the water flow velocity monitored by the flow meter in real time and the water flow velocity required for the test, the flow rate of the water pump 2 is adjusted to control the water flow velocity in the water tank 1 to be constant. Check whether the water flow velocity measured by the flow meter reaches the water flow velocity required for the test. If not, readjust the flow rate of the water pump 2 until the water flow velocity measured by the flow meter reaches the water flow velocity required for the test (i.e., the target water flow velocity).

[0054] Through the adjustment means of step 3 and step 4, the actual water depth and water flow velocity in the water tank 1 are made the same as the water depth and water flow velocity required for the test, the coupling calibration of the water depth and water flow velocity is completed, and the corresponding calibration parameters are saved in the control system.

[0055] Step 5, after completing the calibration of the water depth and water flow velocity required for the test, the next step is to correct the influence of the wave-making signal flow velocity. When the actual water depth and water flow velocity in the water tank 1 reach the water depth and water flow velocity required for the test, the data parameters (wave height and period) of the waves required for the test are input into the control system. The control system corrects the wave-making control signal once in combination with the water flow velocity to obtain the corrected wave parameters. The wave-making control signal is corrected once using the following formula:

[0056]

[0057] T1=1.2T (3)

[0058]

[0059] In the above formula, H represents the wave height required for the test, T represents the wave period required for the test, H1 represents the wave height parameter input into the control system after one correction when waves and currents act together, T1 represents the wave period parameter input into the control system after one correction when waves and currents act together, s represents the relative wave velocity parameter, μ represents the wave velocity under the condition of no water flow, L represents the wavelength at the lifting platform under the condition of no water flow, and g represents the acceleration of gravity.

[0060] Step 6, according to wave theory, when waves propagate to the offshore, the wave height increases due to deformation in shallow water. Therefore, using this characteristic, when the wave-making performance of the wave maker 4 is not sufficient to simulate extreme waves on site, the wave height of the upper test section of the lifting platform 5 can be flexibly adjusted by adding a slope 51 in front of the lifting platform 5 and adjusting the slope of the slope 51 using a hydraulic press. Due to the change in wave height caused by different slopes, the wave-making control signal needs to be corrected twice. The control system determines the wave parameters after the primary correction, determines the required slope, and corrects the slope to determine the wave breaking parameters; including the following contents:

[0061] When H1≤0.55h, the slope m of the lifting platform 5 is 1:20, and a secondary correction is performed according to the slope, as shown in the following formula:

[0062] H2=H1 / k (6)

[0063]

[0064] In the above formula, k represents the slope correction coefficient, L0 represents the deep water wavelength under the condition of no water flow (generally referring to the wavelength at infinite water depth, the wavelength under this wave period), and H2 represents the wave height parameter input into the control system after the secondary correction when the wave and water flow act together;

[0065] When H1 > 0.55h, it is necessary to combine the slope correction coefficient k, adjust the slope m, and conduct the breaking judgment of the wave. It should be noted that if the slope m is too large, the wave height at the upper part of the slope 51 is likely to break. At this time, even if the wave height parameter H2 is increased, the wave height of the test section on the upper part of the actual lifting platform 5 cannot reach the requirement due to breaking, and it will also cause chaos in the wave conditions. Therefore, the value of the slope m is determined by the wave breaking parameter K b determined;

[0066] Collect the wave height H required under different test conditions, the wave period T required for the test, and the water depth h required for the test, and fit to obtain the calculation formula of the breaking parameter K b of:

[0067]

[0068] When K b < H / L, reduce the slope m. When K b ≥ H / L, then use the current slope m to complete the slope correction.

[0069] In this embodiment, relevant research has been carried out. Four slopes of 1:10, 1:20, 1:30, and 1:50 have been selected, and different test conditions have been carried out. The limit breaking parameter K under the conditions of the required wave height H, the required wave period T for the test, and the required water depth h for the test has been studied. During the process of fitting to obtain the calculation formula of the breaking parameter K b , for the two most important influencing factors, the slope m and h / L0, the breaking index K under different slopes m and different relative water depths h / L0 has been carried out b tests, analyzed the influence of K b changing with the values of m and h / L0, and combined with its changing trend to fit the calculation method of K b . b Calculation method.

[0070] The variation of the breaking parameter K b with h / L0

[0071] Under different slopes m, the variation of the breaking parameter K b with h / L0 is shown in Figure 2 shown. At the same slope, as h / L0 increases, the breaking parameter K b all shows a decreasing trend, and shows a logarithmic function relationship. The decreasing rate of the breaking parameter K b is related to the slope m. The larger the slope m, the breaking parameter K bThe greater the rate of decrease, the smaller the slope m, and the smaller the crushing parameter K b The rate of decrease is slow.

[0072] Crushing parameter K b Variation with slope m

[0073] Crushing parameter K b The variation of slope m is shown in Figure 3 As shown in the figure, when h / L0 is constant, as the slope m increases, the crushing parameter K b It shows a linear increasing trend. As h / L0 increases, the crushing parameter K b The rate of change slows down with the slope m.

[0074] Combined with the crushing parameter K b The breaking parameter K is obtained by fitting the changing trend and functional relationship of slope m and h / L0. b The calculation formula is:

[0075]

[0076] According to the above formula, the crushing parameter K is obtained b The comparison between the calculated values ​​and the experimental values ​​obtained by experiment is shown in Figure 4 , it can be seen that the calculated value is in good agreement with the experimental value.

[0077] Step 7, after completing the above two corrections and breaking confirmation, the control system inputs the first corrected wave period parameter T1 and the second corrected wave height parameter H2 into the wave maker 4 to realize automatic calibration of the waves. From then on, this method completes the automatic calibration of water depth-water flow-wave.

[0078] This embodiment further proposes a test tank device using a self-regulating water depth-water flow-wave test method based on the above method. Figure 5 and Figure 6 As shown, the device includes a water tank 1, a water pump 2, a wave maker 4, a lifting platform 5 and a monitoring mechanism 6. The size of the water tank 1 can be 40 meters long, 5 meters wide and 2 meters high; a water pump 2 is arranged at one end of the water tank 1, a water inlet and outlet 3 is arranged at the other end of the water tank 1, a wave maker 4 is arranged on the side of the water inlet and outlet 3 away from the middle of the water tank 1, and a lifting platform 5 is arranged in the middle of the water tank 1.

[0079] The lifting platform 5 is a steel hydraulic lifting platform. A hydraulic rod for adjusting the lifting is arranged at the bottom of the lifting platform 5. The lifting platform 5 includes a slope 51 and a platform 52. The slope 51 is a hypotenuse triangle structure, which is located on the side close to the wave maker 4. The platform 52 is a rectangular parallelepiped structure, which is located on the side away from the wave maker 4. The slope of the slope 51 ranges from 1:100 to 1:5. The top of the slope 51 is flush with the table surface of the platform 52. The length of the lifting platform 5 is one-fifth of the length of the water tank 1, and the width of the lifting platform 5 is consistent with the inner width of the water tank 1. Specifically, the size of the lifting platform 5 can be 8 meters long and 5 meters wide.

[0080] A monitoring mechanism 6 is arranged at the junction of the slope 51 and the platform 52. The monitoring mechanism 6 includes a water level meter, a current meter and a wave height meter. The water level meter, the current meter and the wave height meter are installed side by side at the junction of the slope 51 and the platform 52. The monitoring mechanism 6 establishes a data transmission connection with the control system of the device, and transmits the water level, water flow velocity and wave height data monitored by the monitoring mechanism 6 to the control system. The control system adjusts and controls the operating power of the water pump 2 and the wave maker 4 and the lifting height of the lifting platform 5 according to the monitoring data and test requirements to obtain the water depth and wave height required for the test.

[0081] Wave-breaking slopes 7 for breaking waves are arranged at the front and rear ends of the water tank 1, and the wave-breaking slopes 7 can be paved with large stones. The wave maker 4 is a push-plate wave maker, and the width of the wave-making plate of the wave maker 4 is consistent with the width of the water tank 1, and the height of the wave-making plate does not exceed three quarters of the height of the water tank 1. The power of the wave maker 4 can be selected to be 15kw, the width of the wave-making plate is selected to be 5 meters, and the height is 1.5 meters. The maximum wave height of the wave making is 0.5m, and the maximum period is 4s, which can simulate regular waves and irregular waves of different spectral types.

[0082] The water pump 2 is a bidirectional water pump, and several of them are arranged side by side along the width direction of the water tank 1. One end of the water pump 2 is connected to the inside of the water tank 1, and the other end is connected to the reservoir 8 containing test water, and the water inlet and outlet 3 are connected to the reservoir 8. Under the operation of the water pump 2, the water in the reservoir 8 is pumped into the water tank 1. Since the water pump 2 is a bidirectional water pump, when the water pump 2 injects water into the water tank 1, the water inlet and outlet 3 is the drainage port, and when the water pump 2 discharges the water in the water tank 1 to the reservoir 8, the water inlet and outlet 3 is the water inlet. This arrangement can flexibly adjust the water flow direction in the water tank 1 according to the test needs, thereby improving the convenience of the test.

[0083] The above device is used to calibrate the water depth-water flow-wave test, and the water level meter, current meter and wave height meter, water pump 2 and wave maker 4 controller and other equipment are interconnected with the control system in real time data. Through the water level-water flow-wave self-calibration and self-correction control system, the problem of low automation and large manual calibration error in the traditional flume test is solved. The water depth-flow velocity mutual feedback is realized, and the required water depth and flow velocity are obtained by self-calibration according to the test conditions in the flume 1, which solves the problem of water depth error caused by high or low water level in the traditional wave and flow flume test. Through the double correction and breaking judgment of the wave, the required wave elements are obtained by self-calibration, which solves the problem of deviation caused by wave height deformation caused by the influence of water flow on wave propagation in the traditional wave and flow flume test. The water level is quickly changed by the lifting platform 5, which solves the problem of slow water addition and discharge speed and low test efficiency in the test. By using the shallow water characteristics of waves, by setting a slope 51 at the front end of the lifting platform 5, the problem of improving the simulation accuracy of large wave height waves under the performance limitation of the wave maker 4 is solved.

[0084] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A self-calibrated depth-current-wave test method, characterized in that: The following steps are involved: Step 1, filling the water tank (1) with water to the required water depth for the test; Step 2, the control system controls the number of water pumps (2) turned on according to the water depth and water flow rate required for the input test; Step 3, using the monitoring mechanism (6) to measure the water depth from the water surface to the upper end surface of the lifting platform (5), transmitting the measured data to the control system, and adjusting the height of the lifting platform (5) so that the measured water depth reaches the water depth required for the test; Step 4, using the monitoring mechanism (6) to measure the water flow velocity of the lifting platform (5) after adjustment, transmitting the measured data to the control system, and adjusting the flow rate of the water pump (2) until the measured water flow velocity reaches the water flow velocity required for the test; Step 5, inputting the data parameters of the waves required for the test into the control system, and the control system corrects the wave-making control signal once in combination with the water flow velocity to obtain the corrected wave parameters; Step 6, performing a secondary correction on the wave making control signal, the control system determines the wave parameters after the primary correction, determines the required slope, corrects the slope, and determines the wave breaking parameters; Step 7, the control system inputs the first-corrected wave period parameters and the second-corrected wave height parameters into the wave maker (4), completing the automatic calibration of water depth-water current-wave.

2. A self-calibrated depth-current-wave test method according to claim 1, characterized in that: In step 1, water is poured into the water tank (1) to a required water depth for the test under the condition that there is no water flow and no waves in the water tank (1). The required water depth for the test refers to the water depth from the water surface to the upper end surface of the lifting platform (5).

3. A self-calibrated depth-current-wave test method according to claim 1, characterized in that: In step 2, the control system controls the number of water pumps (2) to be turned on according to the water depth and water flow rate required for the input test. The water flow rate is the vertical average flow rate measured by the monitoring mechanism (6). The number of water pumps (2) to be turned on is determined by the following formula: n=B*V*h (1) Where n is the number of water pumps turned on, B is the width of the water tank, V is the water flow velocity, and h is the water depth required for the test.

4. A self-calibrated depth-current-wave test method according to claim 1, characterized in that: In step 3, after the water flow in the water tank (1) becomes stable, the water depth from the water surface to the upper end surface of the lifting platform (5) is measured using a water level gauge of the monitoring mechanism (6), and the measurement data is transmitted to the control system. If the actual measured water depth is less than the water depth required for the test, the height of the lifting platform (5) is lowered; if the actual measured water depth is greater than the water depth required for the test, the height of the lifting platform (5) is raised so that the measured water depth reaches the water depth required for the test.

5. A self-calibrated depth-current-wave test method according to claim 1, characterized in that: In step 5, the data parameters of the waves required for the test are input into the control system, and the control system uses the following formula to correct the wave control signal in combination with the water flow velocity: T1=1.2T (3) In the above formula, H represents the wave height required for the test, T represents the wave period required for the test, H1 represents the wave height parameter input into the control system after one correction when waves and currents act together, T1 represents the wave period parameter input into the control system after one correction when waves and currents act together, s represents the relative wave velocity parameter, μ represents the wave velocity under the condition of no water flow, L represents the wavelength at the lifting platform under the condition of no water flow, and g represents the acceleration of gravity.

6. A self-calibrated depth-current-wave test method according to claim 1, characterized in that: In step 6, the wave making control signal is corrected for a second time, and the control system determines the wave parameters after the first correction, determines the required slope, corrects the slope, and determines the wave breaking parameters, including the following contents: When H1≤0.55h, the slope m of the lifting platform (5) is 1:20, and a secondary correction is performed according to the slope, as shown in the following formula: H2=H1 / k (6) In the above formula, k represents the slope correction coefficient, L0 represents the deep water wavelength under the condition of no water flow, and H2 represents the wave height parameter input into the control system after secondary correction when waves and water flow act together; When H1>0.55h, the slope m is adjusted in combination with the slope correction coefficient k. The value of the slope m is determined by the wave breaking parameter K. b Sure; The wave height H, wave period T and water depth h required for different test conditions are collected, and the breaking parameter K is obtained by fitting. b The calculation formula is: When K b < H / L, decrease the slope m. When K b ≥ H / L, use the current slope m and complete the slope correction.

7. A test flume device used in the self-calibrated water depth-current-wave test method according to claim 1, characterized in that: The invention comprises a water tank (1), a water pump (2) and a wave maker (4), wherein the water pump (2) is arranged at one end of the water tank (1), a water inlet and outlet (3) is arranged at the other end of the water tank (1), the wave maker (4) is arranged on the side of the water inlet and outlet (3) away from the middle of the water tank (1), a lifting platform (5) is arranged in the middle of the water tank (1), a hydraulic rod for adjusting the lifting is arranged at the lower part of the lifting platform (5), and the lifting platform (5) comprises a slope (51) and a platform (52), wherein the slope (51) is a hypotenuse triangle. The platform (52) is a rectangular parallelepiped structure located on a side close to the wave maker (4); the slope (51) has a slope ranging from 1:100 to 1:5; the top of the slope (51) is flush with the surface of the platform (52); a monitoring mechanism (6) is provided at the junction of the slope (51) and the platform (52); the monitoring mechanism (6) includes a water level meter, a current meter and a wave height meter; and the monitoring mechanism (6) establishes a data transmission connection with the control system.

8. A self-calibrated water depth-current-wave test flume device according to claim 7, characterized in that: Wave-breaking slopes (7) for breaking waves are arranged at the front and rear ends of the water tank (1). The wave maker (4) is a push-plate wave maker. The width of the wave maker (4) is consistent with the width of the water tank (1). The height of the wave maker does not exceed three quarters of the height of the water tank (1).

9. The self-calibrated water depth-current-wave test flume device according to claim 7, characterized in that: The water pump (2) is a bidirectional water pump, and a plurality of water pumps are arranged side by side along the width direction of the water tank (1). One end of the water pump (2) is connected to the inside of the water tank (1), and the other end is connected to a reservoir (8) containing test water. The water inlet and outlet (3) are connected to the reservoir (8).

10. The self-calibrated water depth-current-wave test flume device according to claim 7, characterized in that: The length of the lifting platform (5) is one fifth of the length of the water tank (1), and the width of the lifting platform (5) is consistent with the inner width of the water tank (1).

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