Active wave absorbing device and method for wave making plate of large-scale test pool

Abstract

The invention discloses an active wave absorbing device and method for a wave making plate of a large test pool, and belongs to the technical field of water engineering. The device comprises a wave making plate (1), a push plate mounting frame (2), a motion controller (5), a synchronous belt driving assembly (6) and a driving part mounting frame, one end of the driving part mounting rack is fixed on the pool wall of the test pool, and the other end of the driving part mounting rack is in a free state; the synchronous belt driving assembly is arranged on the driving part mounting frame and is connected with the motion controller; the push plate mounting frame is arranged below the driving part mounting frame and is fixedly connected with the synchronous belt driving assembly; when the synchronous belt driving assembly works under the control of the motion controller, the push plate mounting frame is driven to move in the horizontal direction; the wave making plate is fixed at the front end of the push plate mounting frame and moves along with the push plate mounting frame to make waves; and the motion controller performs control according to a wave making plate control equation determined by the time domain and the frequency domain. According to the invention, the problem of wave reflection of a full-three-dimensional test pool can be solved, and the simulation precision of waves is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of water engineering, and in particular relates to an active wave-breaking device and method for a wave-making plate of a large test pool. Background Art

[0002] With the proposal of the strategy of building a strong maritime nation, the research on ports, coasts, and ship performance has become a hot topic at present, and the research in the above fields cannot be separated from the high-precision wave physical model test environment. In the real ocean environment, when the waves encounter structures during propagation, they are reflected and directly propagate to the infinitely far sea without causing secondary interference to the structures. However, when conducting physical model tests, due to the limitations of the boundary range of the test pool, in the simulation experiment, the waves generated by the wave-making equipment will be reflected at the boundary of the pool, and the reflected waves will interfere and superimpose with the original incident waves, and the effect of the experimental simulation cannot be achieved. The existing wave-breaking technology can be divided into passive wave-breaking technology and quasi-three-dimensional active absorption technology according to its principle.

[0003] Passive wave-absorbing facilities are often installed at the end of the pool, using specific materials or structural forms, but the waves are broken when they propagate to the passive wave-absorbing facilities, and the energy of the incident waves is dissipated, thereby reducing reflection. Passive wave-absorbing technology has a certain effect in wave-absorbing, but it has some disadvantages:

[0004] 1) High maintenance cost: The wave-breaking structure may be affected by waves, currents and corrosion during use and requires regular maintenance and replacement, which increases the operating cost;

[0005] 2) Poor wave absorption performance: Traditional passive wave absorption devices usually adopt a single structure, which has poor wave absorption effect when dealing with long-period waves and high-energy waves;

[0006] 3) Space occupation: The wave-breaking structure needs to occupy a certain amount of pool space, which affects the actual use area of ​​the pool and limits the actual use efficiency of the pool.

[0007] Quasi-3D active absorption technology is based on the idea of ​​generating compensation waves. It links the wave signal fed back by the sensor with the movement of the wave-making plate. It is believed that the displacement of the wave-making plate can be regarded as the superposition of the displacement of the wave-making plate that generates the incident wave and the displacement of the wave-making plate that absorbs the secondary reflected wave. This technology assumes that the angle of the reflected wave is a known and determined angle to actively eliminate the reflection of the wave. Disadvantages:

[0008] 1) Application limitations: Quasi-3D active absorption technology assumes that the reflection wave angle is a known and fixed angle. However, in actual applications, the reflection wave angle is constantly changing. This assumption of a fixed angle limits its application scope. It can only compensate for reflection waves at a single angle and is difficult to cope with complex multi-angle reflection wave fields.

[0009] 2) Poor real-time performance: The preset reflection wave angle is introduced into the three-dimensional hydrodynamic transfer function to calculate the theoretical displacement of the wave-making plate under different wave angles, but it is impossible to determine the wave direction in real time to correct the movement of the wave-making plate. Summary of the invention

[0010] The present invention aims to solve one of the technical problems in the above-mentioned related art at least to a certain extent.

[0011] To this end, the purpose of the present invention is to provide an active wave-breaking device and method for a wave-making plate in a large test pool, which can solve the problem of wave reflection in a full three-dimensional test pool and ensure the simulation accuracy of the waves.

[0012] In order to solve the above-mentioned technical problems, the present invention is achieved as follows:

[0013] The embodiment of the present invention provides an active wave-breaking device for a wave-making plate in a large test pool, the device comprising: a wave-making plate 1, a push plate mounting frame 2, a motion controller 5, a synchronous belt drive assembly 6 and a drive component mounting frame;

[0014] The drive mounting frame is arranged horizontally, and one end is fixed on the wall of the test water pool, and the other end is free; the synchronous belt drive assembly 6 is arranged on the drive mounting frame and connected to the motion controller 5;

[0015] The push plate mounting frame 2 is arranged below the driving member mounting frame and is fixedly connected to the synchronous belt driving assembly 6; when the synchronous belt driving assembly 6 works under the control of the motion controller 5, it drives the push plate mounting frame 2 to achieve horizontal movement; the wave-making plate 1 is fixed to the front end of the push plate mounting frame 2, and moves with the push plate mounting frame 2 to achieve wave breaking and wave making.

[0016] In addition, the active wave-breaking device of the wave-making plate of the large test pool according to the present invention may also have the following additional technical features:

[0017] In some of the embodiments, the device further comprises: a plurality of laser sensors 3, a plurality of ultrasonic sensors 4 and a host computer;

[0018] The laser sensor 3 is arranged at the upper part of the front surface of the wave-making plate, and at least one laser sensor is arranged on each wave-making plate;

[0019] The ultrasonic sensors 4 are arranged on the forward extension line of the driver mounting frame, and the forward extension lengths of the plurality of ultrasonic sensors 4 are different, so that the ultrasonic sensors 4 are arranged alternately;

[0020] The host computer is connected to the laser sensor 3 and the ultrasonic sensor 4 and is used to calculate the control equation of the wave-making plate according to the information collected by the laser sensor 3 and the ultrasonic sensor 4 .

[0021] In some embodiments, the synchronous belt drive assembly 6 includes a servo motor, a driving wheel, a driven wheel, and a synchronous belt with connecting teeth on the inner side;

[0022] The motor shaft of the servo motor is fixedly connected to the driving wheel, one end of the synchronous belt is meshed and connected to the driving wheel, and the other end is meshed and connected to the driven wheel; the rotation of the driving wheel drives the synchronous belt and the driven wheel to rotate; the synchronous belt is fixedly connected to the push plate mounting frame 2, thereby driving the push plate mounting frame 2 to achieve displacement.

[0023] In some of the embodiments, a guide rail slider is provided on the top of the push plate mounting frame 2, and a corresponding horizontal guide rail is provided on the lower surface of the driving member mounting frame, and the guide rail slider is slidably connected to the guide rail; when the push plate mounting frame 2 is driven to move forward and backward, the wave-making plate 1 connected to the push plate mounting frame 2 also moves forward and backward at the same time, generating push and pull forces on the water to achieve the purpose of wave making.

[0024] In some of the embodiments, the host computer performs calculations in both the time domain and the frequency domain according to the information collected by the laser sensor 3 and the ultrasonic sensor 4 to determine the control equation for the wave-making plate.

[0025] In some of the embodiments, the host computer calculates the main direction of the reflected wave field using a direction angle algorithm based on the information collected in real time, and determines the control equation for the wave-making plate based on the main direction.

[0026] In some implementations, the collected information includes amplitude, frequency, and direction of incoming waves.

[0027] In some embodiments, the push plate mounting frame 2 is a triangular stainless steel truss.

[0028] In some of the embodiments, two guide rail sliders are provided on the top of each push plate mounting frame 2 and matched with the two guide rails.

[0029] The embodiment of the present invention also provides an active wave-breaking method for a wave-making plate in a large test pool, characterized in that it is implemented by using an active wave-breaking device for a wave-making plate in a large test pool as described in any one of the above items;

[0030] The method performs calculations in both the time domain and the frequency domain based on the information collected by the sensor in real time to determine the control equation for the wave-making plate, and then sends a real-time control signal to the motion controller 5 according to the control method. The motion controller 5 controls the movement of the synchronous belt drive assembly 6 to drive the corresponding wave-making plate 1 to move and realize wave-making.

[0031] Compared with the prior art, the present invention has at least the following beneficial effects:

[0032] In the embodiment of the present invention, the active wave-breaking device of the wave-making plate of the large test pool is provided. The square structure of the wave-making plate and the connection method with the push plate mounting frame ensure that the wave-making plate can move flexibly and generate waves. The arrangement position and number of the laser sensor and the ultrasonic sensor ensure that the wave signal can be collected in real time and accurately. The motion controller and the synchronous belt drive assembly work together to realize the precise control of the movement of the wave-making plate.

[0033] In the embodiment of the present invention, the active wave-breaking device of the wave-making board of the large test pool is provided, which determines the control mode of the wave-making board from the perspectives of the time domain and the frequency domain, and can ensure that the wave absorption can be effectively performed under different conditions; the introduction of the direction angle algorithm realizes the compensation of multi-angle reflected waves by calculating the direction of the reflected waves in real time;

[0034] In the embodiment of the present invention, the active wave-breaking device of the wave-making plate of the large test pool provided collects data in real time through laser sensors and ultrasonic sensors, thereby ensuring the accuracy and real-time performance of the wave signal; the motion controller adjusts the displacement increment of the wave-making plate in real time according to the wave signal fed back by the sensor in combination with the active absorption algorithm to achieve dynamic compensation; through the motion phase difference of multiple wave-making plates, oblique wave-making is achieved to generate compensation waves, thereby ultimately achieving full three-dimensional active absorption wave-making.

[0035] The active wave breaking method of the wave-making plate of the large test pool of the present invention is implemented by the active wave breaking device of the wave-making plate of the large test pool, and thus at least has all the features and advantages of the active wave breaking device of the wave-making plate of the large test pool, which will not be described in detail here. Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the structure of an active wave-breaking device for a large-scale test pool wave-making plate disclosed in one embodiment of the present invention;

[0037] Figure 2 A schematic diagram of a single-source line array signal receiving method using a directional angle algorithm disclosed in an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of multi-plate oblique wave making disclosed in one embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 1- wave-making plate; 2- push plate mounting frame; 3- laser sensor; 4- ultrasonic sensor; 5- motion controller; 6- synchronous belt drive assembly. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The embodiments of the present invention are described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0043] In view of the fact that the passive wave-breaking devices in the existing wave-breaking technology often need to occupy a large space and need to be regularly maintained according to the use of the wave-breaking equipment, which increases the cost, and because the energy distribution of long waves is relatively wide, it is difficult for a wave-breaking device with a single structure to effectively attenuate its energy, and the absorption effect on long-period waves is relatively poor, and there are certain limitations. In addition, the quasi-three-dimensional active absorption technology considers that the reflected wave angle is a known and determined angle, and its design is mainly for compensating for reflected waves at a single angle, which is difficult to cope with complex multi-angle reflected wave fields, has low real-time performance, and is difficult to achieve the purpose of accurate simulation of the experiment. The present invention proposes an active wave-breaking device for a wave-making plate in a large test pool, which considers that the direction of the reflected wave is unknown and unfixed and has multiple angle components. By placing a laser wave height meter on the plate and placing ultrasonic height meters alternately in front of and behind the plate, the direction of the reflected wave is detected in real time, and the displacement of the wave-making plate is corrected in real time to generate a compensation wave, which can cope with complex multi-angle reflected wave fields, realize full three-dimensional active wave breaking, and ensure the stability and real-time performance of the wave breaking process.

[0044] See also Figure 1 As shown, in some embodiments of the present invention, the active wave-breaking device of the wave-making plate of the large test pool includes: a wave-making plate 1, a push plate mounting frame 2, a laser sensor 3, an ultrasonic sensor 4, a motion controller 5, a synchronous belt drive assembly 6 and a drive component mounting frame.

[0045] In the above embodiment, the driving member mounting frame is arranged horizontally, and one end is fixed on the wall of the test pool, and the other end is free. The synchronous belt drive assembly 6 is arranged on the driving member mounting frame and connected to the motion controller 5; the push plate mounting frame 2 is arranged below the driving member mounting frame and fixedly connected to the synchronous belt drive assembly 6; when the synchronous belt drive assembly 6 works under the control of the motion controller 5, it drives the push plate mounting frame 2 to achieve horizontal movement; the wave-making plate 1 is fixed to the front end of the push plate mounting frame 2, and also moves with the movement of the push plate mounting frame 2. The movement of the wave-making plate 1 drives the movement of water, thereby achieving wave-making.

[0046] In some embodiments of the present invention, the active wave-breaking device of the wave-making plate of the large test pool further comprises a host computer, which is connected to the motion controller 5. When the active wave-breaking device is working, the wave parameters are first set by the host computer, and the excitation signals are formed based on the calculation and processing of the parameters and transmitted to the motion controller 5. The motion controller 5 controls the synchronous belt drive component 6 to perform corresponding actions according to the excitation signal, and the servo motor in the synchronous belt drive component 6 receives the motion instruction from the PLC control program running in the corresponding motion controller, and returns the motion state signal of the servo motor.

[0047] In some embodiments of the present invention, the synchronous belt drive assembly 6 includes a servo motor, a driving wheel, a driven wheel, and a synchronous belt with connecting teeth on the inner side. The servo motor is fixedly connected to the driving wheel, and the motor shaft drives the driving wheel to rotate. One end of the synchronous belt is meshed and connected with the driving wheel, and the other end is meshed and connected with the driven wheel; the rotation of the driving wheel drives the synchronous belt and the driven wheel to rotate. The rotation of the synchronous belt causes the displacement of each position on the synchronous belt. Since the push plate mounting frame 2 is fixedly connected to the synchronous belt, the push plate mounting frame 2 is driven to achieve displacement, that is, the rotation of the servo motor is converted into the forward and backward movement of the push plate mounting frame. There can be multiple groups of synchronous belt drive assemblies 6, and each group of synchronous belt drive assemblies corresponds to a wave-making plate.

[0048] In the above embodiment, the push plate mounting frame 2 can be a triangular stainless steel truss, the top of the triangular stainless steel truss is provided with a guide rail slider, the lower surface of the driving component mounting frame is provided with a corresponding horizontal guide rail, the guide rail slider and the guide rail sliding connection are used to bear the weight of the board surface and the mounting frame, and enable it to slide freely forward and backward. When the push plate mounting frame 2 is driven to move forward and backward, the wave-making plate 1 connected to the push plate mounting frame 2 will also move forward and backward with the mounting frame, generating a push and pull force on the water to achieve the purpose of wave making.

[0049] The number of wave-making plates 1 is more than two, and each wave-making plate simultaneously creates traveling waves (waves with target wave height period) and compensation waves (waves that cancel secondary reflections), so the movement of the wave-making plate is a superposition of wave-making movement and active absorption movement. More than two wave-making plates can realize oblique wave-making by utilizing the phase difference between the plates, achieving a three-dimensional effect.

[0050] Three-dimensional wave generation is a multi-plate collaborative process. Figure 3 In the multi-plate oblique wave-making schematic diagram shown in FIG. When the direction angle θ satisfies formula (1), oblique wave generation with a direction angle of can be performed. Wherein, the wave period is T, the wavelength is L, the wave-making plates are arranged along the y direction, the normal direction of the wave-making boundary is the x direction, the width of a single plate is b, the total number of plates is m, and k 0 is the travelling wave number.

[0051]

[0052] In some embodiments of the present invention, the laser sensor 3 is arranged at the upper part of the front surface of the wave-making plate, and each wave-making plate is provided with at least one laser sensor 3. The ultrasonic sensor 4 is fixedly arranged at the upper front part of the wave-making plate in a forward extending manner, and the forward extending direction may be forward extending along the drive member mounting frame, and the forward extending lengths of the plurality of ultrasonic sensors 4 are different, so that the ultrasonic sensors 4 are arranged in an alternating manner.

[0053] In the process of theoretical derivation, the active absorption method is divided into time domain algorithm and frequency domain algorithm according to the different solution domains. The algorithms of the two domains are combined to determine the control method of the wave-making plate.

[0054] Time domain algorithm:

[0055] The displacement of the wave-making plate is determined by the displacement value x of the wave-making plate that generates the traveling wave. geb (t) and the displacement value x of the wave-making plate that generates the compensation wave abs (t) Composition:

[0056] x a (t) = x gen (t)+x abs (t) = X mg sin(ωt-kysinθ)+X ma sin(ωt-kysinθ+φ) (2)

[0057] Where, X mg , X ma are the strokes of the wave-making board for pure wave-making and compensated wave-making, respectively; ω is the angular frequency; k is the wave number of the wave period T at the water depth; y is the coordinate of the center position of the wave-making board; and θ is the wave direction angle.

[0058] Let the wave height on the wave-making plate in the quasi-three-dimensional active absorption wave-making pool be η 0 (t), which can be expressed as:

[0059]

[0060] Where ηp (t) is the target traveling wave height, is the corresponding non-propagating mode wave height, η r (t) is the height of the first reflected wave, η rr (t) is the height of the secondary reflected wave, Movement of wave-making plates for active absorption abs (t) The height of the compensation wave generated, its absolute value is equal to η rr (t) are consistent, with a phase difference of 180°, is the non-modal wave height generated by this process. When the secondary reflection coefficient is 100%, η r (t) = η rr (t). And from the linear wave theory, we know that:

[0061]

[0062] e 0 and e n The three-dimensional hydrodynamic transfer functions of the traveling wave and the non-propagating modal terms are respectively expressed as:

[0063]

[0064] By transforming the above equation with the linear wave-making theory, we can get the control equation of active absorption in the time domain, where m represents the mth moment and x represents the real-time displacement value of the wave-making plate:

[0065]

[0066] Frequency domain algorithm:

[0067] When the wave machine is in active absorption mode, the movement of the wave machine can be regarded as the superposition of pure wave making motion and compensating wave making motion, that is, the frequency domain complex amplitude X of the wave machine motion can be expressed as:

[0068]

[0069] In the above formula, X a abs and X a gen are the frequency domain complex amplitudes of the displacement of the wave maker under pure wave generation and the displacement of the wave maker corresponding to the generated compensation wave, respectively. p，0 is the theoretical frequency domain complex amplitude of the target wave height in front of the plate calculated by the linear wave making theory, F is the frequency domain transfer function of active absorption wave making, which is related to the three-dimensional hydrodynamic transfer function e 0 、e n related.

[0070]

[0071] Then through inverse Fourier transform, we can get:

[0072] x a =(2η p -η 0 )F (11)

[0073] In digital signal processing, equation (11) can be regarded as a single-input single-output discrete linear time-invariant system (LTI system) whose input is the wave height signal and whose output is the wave-making plate displacement signal. By constructing the active absorption frequency transfer function, a linear constant coefficient difference equation is corresponding, such as equation (12), which is a typical difference equation form.

[0074]

[0075] In the formula, y and x are the output signal and input signal respectively, and the filter coefficient a is n 、b m It determines the relationship between the input and output signals and is also the design parameter of the frequency domain filter corresponding to the difference equation, which is obtained by fitting the frequency domain transfer function F of the filter.

[0076] From the above active absorption theory, it can be seen that in order to realize the active absorption function in the wave-making system, it is necessary to obtain wave parameter information as a control signal to participate in the calculation of the active absorption algorithm, so it is necessary to deploy a wave height sensor for real-time data collection. In order to avoid interference from the strong electrical environment and control the test cost at the same time, a laser sensor 3 is arranged on the wave-making board and an ultrasonic sensor 4 is alternately arranged in front of the wave-making board, so that the wave surface is collected more accurately and the real-time nature of the wave surface signal collection is ensured. The wave height on the wave-making board, that is, η 0 (t), the displacement increment of the wave-making plate is obtained according to the above derivation process.

[0077] Direction angle algorithm:

[0078] Assume that the signal acquisition array (ultrasonic sensor 4) is an array arranged in a straight line, with a total of M array elements and a distance d between the array elements. Figure 2 As shown. In this case, a signal source emitting a single-frequency signal is located at a certain position far away. Based on the geometric relationship, the signal measured by each array element can be obtained as:

[0079]

[0080] Among them, S 0 is the amplitude of the signal, ω is the frequency of the signal, φ is the initial phase of the signal. Theoretically, it is a complex signal, t refers to the current moment, and j refers to the imaginary part. In the algorithm derivation process, it is assumed that the angle between the signal direction and the normal of the sensor linear array is θ, and the signal propagation speed is c. Let the vector a(θ) based on the incoming wave direction θ be:

[0081]

[0082] Then the signal X(t) measured by each array element can be expressed as the product of the source signal S(t) and the direction vector a(θ). In actual situations, the source signal may be composed of multiple signals superimposed, and each signal component may have a different angle of arrival direction. In practical applications, the influence of noise needs to be considered.

[0083] In this case, the data collected by the array is expressed in complex form, which contains information such as the amplitude, frequency and direction of each source signal component, which can be regarded as the superposition of multiple spatial harmonic signals. Therefore, spatial spectrum analysis can be introduced to define the spatial spectrum function P(θ):

[0084]

[0085] In the formula, α(θ) is a vector based on the incoming wave direction θ, α H (θ) and EN H are α(θ) and E N The conjugate transposed matrix, E N To construct the pseudo-noise matrix, substitute each angle into it and calculate the value of the spectrum function. After scanning, the peak of the spectrum function is the incoming wave direction angle.

[0086] During the active absorption process, the above-mentioned real-time directional angle detection algorithm is introduced to process the data collected by the ultrasonic sensor 4 in front of the wave-making board, and the main direction of the wave field of the reflected wave is calculated in real time. The wave height signal is collected in real time through the laser sensor 3 on the board, and the calculated wave height, angle and other information are fed back to the motion controller 5 in real time. According to the wave signal fed back by the sensor and the position of the wave-making board at the current moment, combined with the active absorption algorithm, the displacement increment of the wave-making board at the current moment is output. By adjusting the movement form of the wave-making board 1, the phase difference of the movement of multiple wave-making boards can be used to make oblique waves, generate compensation waves in real time, and finally realize full three-dimensional active absorption wave-making.

[0087] The advantages of the present invention over the prior art mainly include:

[0088] 1. Existing passive wave-breaking facilities need to occupy a certain amount of pool space, which affects the actual use area of ​​the pool and limits the actual use efficiency of the pool. The present invention uses an active wave-breaking device, which does not need to occupy a large amount of additional pool space, and the arrangement of the wave-making plate and the sensor is compact, thereby improving the actual use efficiency of the pool.

[0089] 2. The existing wave-breaking structure may be affected by waves, water flow and corrosion during use, and requires regular maintenance and replacement, which increases the operating cost. The present invention uses laser sensors and ultrasonic sensors for real-time data collection, which reduces the wear and corrosion risks of the mechanical structure and reduces maintenance costs.

[0090] 3. Existing wave-breaking devices usually adopt a single structural form, and the wave-breaking effect is poor when dealing with long-period waves and high-energy waves. The present invention can effectively deal with waves of different frequencies and energies and improve the wave-breaking performance by combining time domain and frequency domain algorithms and introducing directional angle algorithms.

[0091] 4. The existing quasi-3D active absorption technology assumes that the reflected wave angle is a known and determined angle, which makes it difficult to cope with complex multi-angle reflected wave fields and has low real-time performance. The present invention can dynamically adjust the displacement increment of the wave-making plate by calculating the direction of the reflected wave in real time and combining the real-time data collection of the laser sensor and the ultrasonic sensor, thereby enhancing the real-time performance and adaptability of the system.

[0092] 5. The existing quasi-three-dimensional active absorption technology can only compensate for the reflected waves at a single angle, and it is difficult to cope with complex multi-angle reflected wave fields. The present invention realizes oblique wave making and generates compensation waves through the motion phase difference of multiple wave-making plates, and finally realizes full three-dimensional active absorption wave making, which can cope with complex multi-angle reflected wave fields.

[0093] Parts of the present invention that are not described in detail may refer to the prior art in the art or are known to those skilled in the art, and will not be described in detail here.

[0094] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. An active wave-breaking device for a large test pool wave-making plate, characterized in that: The device comprises: a wave-making plate (1), a push plate mounting frame (2), a motion controller (5), a synchronous belt drive assembly (6) and a drive component mounting frame; The drive component mounting frame is arranged horizontally, with one end fixed on the wall of the test water pool and the other end being free; the synchronous belt drive assembly (6) is arranged on the drive component mounting frame and connected to the motion controller (5); The push plate mounting frame (2) is arranged below the drive member mounting frame and is fixedly connected to the synchronous belt drive assembly (6); when the synchronous belt drive assembly (6) works under the control of the motion controller (5), it drives the push plate mounting frame (2) to achieve horizontal movement; the wave-making plate (1) is fixed to the front end of the push plate mounting frame (2) and moves with the push plate mounting frame (2) to achieve wave breaking and wave making.

2. The active wave-breaking device of the wave-making plate of the large test pool according to claim 1 is characterized in that: The device further comprises: a plurality of laser sensors (3), a plurality of ultrasonic sensors (4) and a host computer; The laser sensor (3) is arranged at the upper part of the front surface of the wave-making plate, and at least one laser sensor is arranged on each wave-making plate; The ultrasonic sensors (4) are arranged on the forward extension line of the drive member mounting frame, and the forward extension lengths of the plurality of ultrasonic sensors (4) are different, so that the ultrasonic sensors (4) are arranged alternately; The host computer is connected to the laser sensor (3) and the ultrasonic sensor (4) and is used to calculate a control equation for the wave-making plate based on information collected by the laser sensor (3) and the ultrasonic sensor (4).

3. The active wave-breaking device of the wave-making plate of the large test pool according to claim 1 is characterized in that: The synchronous belt drive assembly (6) comprises a servo motor, a driving wheel, a driven wheel and a synchronous belt with connecting teeth provided on the inner side; The motor shaft of the servo motor is fixedly connected to the driving wheel, one end of the synchronous belt is meshedly connected to the driving wheel, and the other end is meshedly connected to the driven wheel; the driving wheel rotates to drive the synchronous belt and the driven wheel to rotate; the synchronous belt is fixedly connected to the push plate mounting frame (2), thereby driving the push plate mounting frame (2) to achieve displacement.

4. The active wave-breaking device of the wave-making plate of the large test pool according to claim 3 is characterized in that: A guide rail slider is provided on the top of the push plate mounting frame (2), and a corresponding horizontal guide rail is provided on the lower surface of the driving member mounting frame, and the guide rail slider is slidably connected to the guide rail; when the push plate mounting frame (2) is driven to move forward and backward, the wave-making plate (1) connected to the push plate mounting frame (2) also moves forward and backward at the same time, generating a push and pull force on the water to achieve the purpose of wave making.

5. The active wave-breaking device of the wave-making plate of the large test pool according to claim 2 is characterized in that: The host computer performs calculations in both the time domain and the frequency domain based on the information collected by the laser sensor (3) and the ultrasonic sensor (4) to determine the control equation for the wave-making plate.

6. The active wave-breaking device of the wave-making plate of the large test pool according to claim 5 is characterized in that: The host computer calculates the main direction of the reflected wave field using a direction angle algorithm according to the information collected in real time, and determines the control equation for the wave-making plate according to the main direction.

7. The active wave-breaking device of the wave-making plate of the large test pool according to claim 6 is characterized in that: The collected information includes amplitude, frequency and incoming wave direction.

8. The active wave-breaking device of the wave-making plate of the large test pool according to claim 1 is characterized in that: The push plate mounting frame (2) is a triangular stainless steel truss.

9. The active wave-breaking device of the wave-making plate of the large test pool according to claim 4 is characterized in that: Two guide rail sliders are provided on the top of each push plate mounting frame (2) and match the two guide rails.

10. An active wave-breaking method for a large test pool wave-making plate, characterized in that: This is achieved by using an active wave-breaking device of a large test pool wave-making plate as claimed in any one of claims 1 to 9; The method performs calculations in both the time domain and the frequency domain based on information collected in real time by the sensor to determine a control equation for the wave-making plate, and then sends a real-time control signal to a motion controller (5) based on the control method. The motion controller (5) controls the movement of a synchronous belt drive component (6) to drive the corresponding wave-making plate (1) to move and realize wave-making.

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