Subfissure test method of flexible support assembly panel and related device

Abstract

The invention provides a subfissure testing method of a flexible support assembly panel and a related device, and relates to the photovoltaic field. Determining a traction stroke of a traction device based on the parameter value of the vibration parameter of the target panel, determining a parameter value of a hidden crack test parameter according to the parameter value of the vibration parameter and the traction stroke of the traction device, and performing hidden crack test operation on the target panel by using the parameter value of the hidden crack test parameter to obtain a hidden crack test result, the hidden crack test of the flexible support assembly panel is realized, so that the flexible support assembly panel can be replaced in time when the hidden crack test of the flexible support assembly panel is not qualified. Besides, in the testing process, the traction device moves up and down, and the elongation of the assembly cable provided with the target panel changes correspondingly, so that the target panel is driven to move, the wind pressure effect in an actual installation scene and the vibration condition when the actual assembly panel is subjected to wind pressure are simulated, the testing scene is matched with the actual installation scene, and the testing accuracy is improved. And the accuracy of the subfissure test is improved.

Description

Technical Field

[0001] The present application relates to the photovoltaic field, and more specifically, to a method and related device for testing hidden cracks in a flexible support assembly panel. Background Art

[0002] The photovoltaic industry has been booming in recent years, and flexible brackets have been continuously recognized by customers for their large span, small footprint, low cost, and strong terrain adaptability.

[0003] After the flexible support component panel is installed and used, if the flexible support component panel has hidden cracks due to wind vibration, it will directly affect the power generation and service life of the component. Therefore, it is necessary to conduct a hidden crack test before the flexible support component panel is installed and used to determine whether the flexible support component panel can withstand the wind pressure in actual scenarios.

[0004] So how to realize hidden crack testing is a technical problem that technical personnel in this field need to solve urgently. Summary of the invention

[0005] In view of this, the present application provides a method and related device for testing hidden cracks in a flexible support assembly panel to solve the problem of the urgent need to perform hidden crack testing on the flexible support assembly panel.

[0006] In order to solve the above technical problems, this application adopts the following technical solutions:

[0007] A method for testing hidden cracks of a flexible support assembly panel, comprising:

[0008] determining parameter values ​​of vibration parameters of the target panel;

[0009] Based on the parameter value of the vibration parameter, determining the traction stroke of the traction device; wherein the traction device is used to drive the target panel to move;

[0010] Determining the parameter value of the hidden crack test parameter according to the parameter value of the vibration parameter and the traction stroke of the traction device;

[0011] A hidden crack test operation is performed on the target panel using the parameter value of the hidden crack test parameter to obtain a hidden crack test result.

[0012] Optionally, the vibration parameter includes a vibration frequency;

[0013] Determine the parameter values ​​of the vibration parameters of the target panel, including:

[0014] Construct a simulation model of a flexible bracket;

[0015] Determining a modal analysis result of the flexible bracket simulation model;

[0016] A first-order natural frequency is extracted from the modal analysis result, and the first-order natural frequency is used as the vibration frequency.

[0017] Optionally, the vibration parameters include vibration amplitudes under different vibration modes;

[0018] Determine the parameter values ​​of the vibration parameters of the target panel, including:

[0019] Loading the wind pressure time history data onto the component array in the flexible support simulation model to obtain a target simulation model;

[0020] Determine a time history curve corresponding to the target simulation model; the time history curve includes a cable axial force time history curve of the component cable and a vertical displacement time history curve of the four corners of the panel;

[0021] If the vibration mode is overall motion, the stroke of the first traction device is calculated according to the cable axial force time history curve, and the stroke of the first traction device is used as the vibration amplitude under the overall motion;

[0022] If the vibration mode is torsional motion, the stroke of the second traction device is calculated according to the vertical displacement time history curve, and the stroke of the second traction device is used as the vibration amplitude under the torsional motion.

[0023] Optionally, calculating the stroke of the first traction device according to the cable axis force time history curve includes:

[0024] Calculating the cable axial force change value according to the cable axial force time history curve and the initial prestress of the cable;

[0025] Calculating the cable stress based on the cable axial force change value and the cable cross-sectional area;

[0026] Calculating the cable strain according to the cable stress and the elastic modulus of the cable material;

[0027] The first traction device stroke is calculated using the cable strain.

[0028] Optionally, calculating the stroke of the first traction device by using the cable strain includes:

[0029] Calculate the elongation of the component cable according to the cable strain and the initial length of the component cable; the initial length of the component cable is: the length from the position where the traction device of the component cable is configured to the installation edge point of the component cable;

[0030] Calculating a target length of the component cable based on the elongation of the component cable and the initial length of the component cable;

[0031] The first traction device stroke is calculated according to the target length and the initial length of the component rope.

[0032] Optionally, calculating the stroke of the second traction device according to the vertical displacement time history curve includes:

[0033] Determining a target plane according to the time histories of any three angles in the vertical displacement time history curve;

[0034] Calculating the relative distance between another corner of the panel that does not form the target plane and the target plane;

[0035] Based on the relative distance, a second traction device stroke is determined.

[0036] Optionally, the vibration parameter includes the number of vibrations;

[0037] Determine the parameter values ​​of the vibration parameters of the target panel, including:

[0038] Acquire a traction device travel curve of a first traction device travel in a preset time period;

[0039] A statistical analysis is performed on the first traction device stroke in the traction device stroke curve to determine the first traction device stroke and the vibration times corresponding to each stroke interval.

[0040] Optionally, the traction device includes a first traction device set and a second traction device set; the first traction device set is provided with at least one first traction device; the second traction device set is provided with at least one second traction device;

[0041] Determining a traction stroke of the traction device based on the parameter value of the vibration parameter includes:

[0042] For each travel interval, the sum of the first traction device travel and the second traction device travel corresponding to the travel interval is used as the traction travel of the first traction device, and the first traction device travel corresponding to the travel interval is used as the traction travel of the second traction device.

[0043] Optionally, determining the parameter value of the hidden crack test parameter according to the parameter value of the vibration parameter and the traction stroke of the traction device includes:

[0044] For each travel interval, the vibration frequency in the vibration parameter is used as the vibration frequency corresponding to the travel interval;

[0045] The traction stroke of the first traction device, the traction stroke of the second traction device, the number of vibrations and the vibration frequency corresponding to each of the stroke intervals are used as parameter values ​​of the hidden crack test parameters.

[0046] Optionally, using the parameter value of the hidden crack test parameter to perform a hidden crack test operation on the target panel to obtain a hidden crack test result includes:

[0047] According to the parameter value of the hidden crack test parameter, controlling the motor to drive the first traction device and the second traction device to move, so as to drive the target panel to move;

[0048] After the target panel stops moving, collecting image information of the target panel;

[0049] A hidden crack analysis operation is performed on the image information to obtain a hidden crack test result.

[0050] A device for testing hidden cracks of a flexible support assembly panel, comprising:

[0051] A first parameter determination module, used to determine a parameter value of a vibration parameter of a target panel;

[0052] A stroke determination module, used to determine the traction stroke of the traction device based on the parameter value of the vibration parameter; wherein the traction device is used to drive the target panel to move;

[0053] A second parameter determination module, used to determine a parameter value of a hidden crack test parameter according to a parameter value of the vibration parameter and a traction stroke of the traction device;

[0054] The hidden crack test module is used to perform a hidden crack test operation on the target panel using the parameter value of the hidden crack test parameter to obtain a hidden crack test result.

[0055] An electronic device comprises at least one processor and a memory connected to the processor, wherein:

[0056] The memory is used to store computer programs;

[0057] The processor is used to execute the computer program so that the electronic device can implement the above-mentioned hidden crack testing method for the flexible bracket assembly panel.

[0058] A hidden crack testing system for a flexible bracket assembly panel includes the above-mentioned electronic device and also includes: a test bench;

[0059] The test bench is used to drive the traction device to move through a motor, so as to drive the target panel to move.

[0060] Optionally, the test bench comprises:

[0061] a first drive device and a second drive device;

[0062] The first driving device includes a plurality of single-drive reciprocating motors, which respectively drive the component ropes on which the target panels are mounted to reciprocate up and down through the traction device to achieve double-point synchronous driving, double-point asynchronous driving, or single-point driving;

[0063] The second driving device includes a synchronous reciprocating motor, which is connected to the traction device through an adjusting rod to drive the component rope with the target panel installed to reciprocate up and down.

[0064] A computer storage medium carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement the above-mentioned method for testing hidden cracks in a flexible bracket assembly panel.

[0065] The present application provides a method and related device for testing the hidden cracks of a flexible support component panel. In the present application, the parameter value of the vibration parameter of the target panel is determined, and the traction stroke of the traction device is determined based on the parameter value of the vibration parameter. The parameter value of the hidden crack test parameter is determined according to the parameter value of the vibration parameter and the traction stroke of the traction device. The parameter value of the hidden crack test parameter is used to perform a hidden crack test operation on the target panel to obtain a hidden crack test result, thereby realizing a hidden crack test on the flexible support component panel. When the hidden crack test of the flexible support component panel fails, the flexible support component panel can be replaced in time to avoid the problem of hidden cracks affecting the power generation and service life of the component after installation and use. In addition, in the present application, during the test process, the target panel is driven to move by the traction device to simulate the wind pressure effect in the actual installation scene and the vibration of the actual component panel when it is subjected to wind pressure, so that the test scene matches the actual installation scene and improves the accuracy of the hidden crack test. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0067] Figure 1 A flow chart of a method for testing hidden cracks in a flexible support assembly panel provided in an embodiment of the present application;

[0068] Figure 2 A three-dimensional schematic diagram of a test bench (mounting component panel) provided in an embodiment of the present application;

[0069] Figure 3 A three-dimensional schematic diagram of a test bench (without components installed) provided in an embodiment of the present application;

[0070] Figure 4 A front view of a test bench (without components installed) provided in an embodiment of the present application;

[0071] Figure 5A top view of a test bench (without components installed) provided in an embodiment of the present application;

[0072] Figure 6 A left view of a test bench (without components installed) provided in an embodiment of the present application;

[0073] Figure 7 An example diagram of a flexible bracket simulation model provided in an embodiment of the present application;

[0074] Figure 8 A first-order overall undulating vibration modal diagram of the flexible bracket provided in an embodiment of the present application;

[0075] Fig. 9 A flow chart of a method for determining a vibration amplitude provided in an embodiment of the present application;

[0076] Fig.10 A schematic diagram of a travel curve of a motor traction device provided in an embodiment of the present application;

[0077] Fig.11 A schematic diagram of the structure of a hidden crack testing device for a flexible bracket assembly panel provided in an embodiment of the present application;

[0078] Fig.12 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0079] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0080] The photovoltaic industry has been booming in recent years, and flexible brackets have been continuously recognized by customers for their large span, small footprint, low cost, and strong terrain adaptability.

[0081] After the flexible support component panel is installed and used, if the flexible support component panel has hidden cracks due to wind vibration, it will directly affect the power generation and service life of the component. Therefore, it is necessary to conduct a hidden crack test before the flexible support component panel is installed and used to determine whether the flexible support component panel can withstand the wind pressure in actual scenarios.

[0082] If a one-to-one test is conducted before the launch of a new flexible bracket product, the cycle is long and the cost is high, which is difficult to carry out in actual projects. Therefore, the hidden crack test of the flexible bracket component panel is usually carried out on a vibration test bench. How to reproduce the vibration form of the actual-size flexible bracket under different project conditions (actual wind pressure at the project site, actual photovoltaic array arrangement, etc.) on the vibration test bench is directly related to the rationality of the component hidden crack test.

[0083] To this end, in the embodiment of the present application, the flexible bracket component panel actually used is installed on the component cable on the test bench to simulate the actual photovoltaic array arrangement. In addition, during the test, the traction device moves up and down, and the elongation of the component cable installed with the target panel changes accordingly, thereby driving the target panel to move, simulating the wind pressure effect in the actual installation scene and the vibration of the actual component panel when it is subjected to wind pressure, so that the test scene matches the actual installation scene, and improves the accuracy of the hidden crack test.

[0084] Based on the above content, an embodiment of the present application provides a method for testing hidden cracks in a panel of a flexible support assembly, and the execution subject may be a controller, a processor, a server, etc. For example, in a photovoltaic scenario, a photovoltaic controller may be used to execute a method for testing hidden cracks in a panel of a flexible support assembly in an embodiment of the present application.

[0085] Reference Figure 1 A method for testing hidden cracks in a panel of a flexible support assembly may include:

[0086] S11. Determine parameter values ​​of vibration parameters of the target panel.

[0087] Specifically, the target panel in the present application refers to the flexible bracket component panel that actually needs to be installed. In the embodiment of the present application, in order to realize the test, two or more target panels can be used for testing.

[0088] During the test, the target panel has corresponding vibration parameters, which can be as follows:

[0089] Vibration frequency, vibration amplitude under different vibration modes, and number of vibrations, etc.

[0090] In actual scenarios, the parameter values ​​of vibration parameters can be obtained by using model simulation.

[0091] S12. Determine a traction stroke of the traction device based on the parameter value of the vibration parameter.

[0092] The traction device can be implemented by a push rod. When the traction device moves up and down, the elongation of the component cable on which the target panel is installed will change accordingly to drive the target panel to move.

[0093] In actual scenarios, the test bench structure used is as follows Figure 2-6 As shown, Figure 2 The three-dimensional schematic diagram of the test bench (installation components) is shown in Figure 1. Figure 3 This is a three-dimensional schematic diagram of the test bench (without components installed). Figure 4 This is the main view of the test bench (without components installed). Figure 5 This is a top view of the test bench (without components installed). Figure 6 This is the left view of the test bench (without components installed).

[0094] Wherein, each figure is marked as:

[0095] Driving device 1, driving device 2, component panel 3, component rope 4, component rope 5, motor reducer 6, traction device 7, traction device 8, motor reducer 9, motor reducer 10, traction device 11, traction device 12, anchor 13, intermediate pressure block 14, ear hole 15, component connecting part 16, adjusting rod 17, adjusting rod 18.

[0096] like Figure 2-6 As shown, the test bench is equipped with two sets of drive devices, which are respectively recorded as drive device 1 and drive device 2 for the convenience of introduction. Drive device 1 includes two single-drive reciprocating motors, and the two motors drive two component cables to reciprocate up and down through traction devices, which can realize double-point synchronous drive, double-point asynchronous drive, and single-point drive. Drive device 2 includes a synchronous reciprocating motor, which drives two component cables to reciprocate up and down through two adjustment rods connected to two traction devices, which can more strictly ensure double-point synchronous drive compared to drive device 1. The lengths of the two adjustment rods are adjustable and do not have to be kept the same, so that the up and down reciprocating strokes of the two cables can be adjusted independently. The two sets of drive devices equipped with the test bench can be selected according to the test purpose in actual applications. It should be noted that the vibration test bench device in this application can set different vibration frequencies, vibration forms and vibration amplitudes according to theoretical calculation results when conducting hidden crack tests on photovoltaic modules, and is suitable for a variety of wind pressure conditions and array arrangements.

[0097] The driving device 1 includes a motor reducer 9 and a motor reducer 10. Before the test bench starts working, the component panel 3 is installed on the component cable 4 and the component cable 5 in the driving device 1. The two motor reducers drive the component cable 4 and the component cable 5 to reciprocate up and down through the traction device 11 and the traction device 12, respectively, so as to realize double-point synchronous drive, double-point asynchronous drive, and single-point drive. The driving device 2 includes a motor reducer 6, which is connected to the traction device 7 and the traction device 8 through the adjustment rod 17 and the adjustment rod 18, and drives the component cable 4 and the component cable 5 to reciprocate up and down through the traction device 7 and the traction device 8. Compared with the driving device 1, the driving device 2 can more strictly ensure the double-point synchronous drive. A plurality of mounting holes are set on the adjustment rod 17 and the adjustment rod 18, and the corresponding mounting holes can be selected according to the needs, so as to control the up and down reciprocating stroke of the two cables to be independently adjusted, so as to realize the reciprocating stroke and speed of the motor to be infinitely adjusted, and realize the hidden crack test of the photovoltaic panel under different working conditions, so as to solve the problems of long product testing cycle, poor reusability, and high installation and operation cost.

[0098] Ear holes 15 are reserved on the beams at both ends of the test bench for the component cables 4 and 5 to pass through and be fixed with anchors 13. An intermediate pressure block 14 is set on the middle beam of the test bench for the component cables to pass through. The anchor can be a special in vitro cable anchor or an ordinary anchor used for a flexible bracket. The component cable at the end of the anchor 13 is tensioned by a jack to achieve prestressing of the cable, and the cable force is measured by a dynamometer. Different component panels 3 are fixed to the component cables through component connectors 16. The two component cables have different heights, and the component panels installed on the component cables will maintain a certain tilt angle, which is consistent with the actual tilt angle of the project.

[0099] Regardless of whether it is the above-mentioned drive device 1 or drive device 2, the motor reducer can drive the traction device to move up and down. During the movement of the traction device, the elongation of the component cable on which the target panel is installed will change accordingly to drive the target panel to move, simulating the effect of actual wind pressure on the panel.

[0100] When the motor reducer drives the traction device to move up and down, the stroke of the traction device needs to be determined. Different traction device strokes will lead to different wind pressure effects. Therefore, the traction device stroke needs to be determined according to the actual scenario so that the wind pressure simulated by the test bench is consistent with the actual scenario.

[0101] S13. Determine the parameter value of the hidden crack test parameter according to the parameter value of the vibration parameter and the traction stroke of the traction device.

[0102] Specifically, after obtaining the parameter value of the vibration parameter and the traction stroke of the traction device, the parameter value of the hidden crack test parameter can be determined based on these two data.

[0103] In this embodiment, the hidden crack test parameters refer to the parameters used in the hidden crack test process, such as the traction stroke of the first traction device (such as the traction device 11 in the above-mentioned driving device 1), the traction stroke of the second traction device (such as the traction device 12 in the above-mentioned driving device 1), the number of vibrations and the vibration frequency.

[0104] S14. Perform a hidden crack test operation on the target panel using the parameter value of the hidden crack test parameter to obtain a hidden crack test result.

[0105] In this embodiment, before performing the component hidden crack test, it is necessary to ensure that the target panel used has no hidden cracks. At this time, an EL (electroluminescent) test can be performed on it to ensure that the component has no hidden cracks before the test.

[0106] Specifically, an image acquisition device such as a camera can be used to capture an image of the target panel, and an EL test can be performed on it to obtain a hidden crack analysis result. If there is no hidden crack, it can be installed on the test bench for hidden crack testing. If there is hidden crack, a new target panel needs to be replaced and the EL test is performed again until two target panels without hidden cracks are selected, and they are installed on the component cable of the test bench to start testing.

[0107] During the test, the parameter values ​​of the hidden crack test parameters are used to perform a hidden crack test operation on the target panel. After the test is completed, image information of the target panel is collected, and a hidden crack analysis operation is performed on the image information to obtain a hidden crack test result.

[0108] In this embodiment, after the test is completed, the EL test is still used to perform hidden crack analysis to determine whether the target panel can withstand the wind pressure without hidden cracks after the hidden crack test on the test bench. If no hidden cracks occur, it means that the flexible bracket structure is reasonably designed. If hidden cracks occur, it means that the flexible bracket structure needs further improvement.

[0109] In this embodiment, the parameter value of the vibration parameter of the target panel is determined, and the traction stroke of the traction device is determined based on the parameter value of the vibration parameter. The parameter value of the hidden crack test parameter is determined according to the parameter value of the vibration parameter and the traction stroke of the traction device. The parameter value of the hidden crack test parameter is used to perform a hidden crack test operation on the target panel to obtain a hidden crack test result, thereby realizing a hidden crack test of the flexible support component panel. Therefore, when the flexible support component panel fails the hidden crack test, the flexible support component panel can be replaced in time to avoid the problem of hidden cracks affecting the power generation and service life of the component after installation and use. In addition, in this application, during the test process, the traction device moves up and down, and the elongation of the component cable installed with the target panel changes accordingly, thereby driving the target panel to move, simulating the wind pressure effect in the actual installation scene and the vibration of the actual component panel when it is subjected to wind pressure, so that the test scene matches the actual installation scene and improves the accuracy of the hidden crack test.

[0110] The above embodiment mentioned that the parameter values ​​of the vibration parameters of the target panel need to be determined, and the determination process is now described in detail.

[0111] 1. The vibration parameters include vibration frequency.

[0112] Determining parameter values ​​of vibration parameters of the target panel may include:

[0113] 1) Construct a flexible bracket simulation model.

[0114] When determining the vibration frequency, it is necessary to determine it through model simulation. When performing model simulation, it is necessary to first build a simulation model of the flexible bracket. Specifically, the modeling is completed in the calculation software according to the actual design information. During the modeling, the size, cross-section, material and connection relationship between components of all components in the flexible bracket must be consistent with the actual situation. Figure 7 This is an example diagram of a flexible bracket simulation model corresponding to a certain flexible bracket.

[0115] 2) Determine the modal analysis results of the flexible bracket simulation model.

[0116] Specifically, the modal analysis results of the flexible bracket simulation model can be determined according to the modal analysis method. The modal analysis results include: the natural frequencies of the flexible bracket and the vibration modes corresponding to the natural frequencies. For example, the vibration mode corresponding to the first-order overall undulating vibration natural frequency is the overall undulating vibration, and the vibration mode corresponding to the internode torsional vibration natural frequency is the torsional vibration...

[0117] Among them, the modal analysis method is a method to study the dynamic characteristics of the structure. The mode refers to the natural vibration characteristics of the mechanical structure. Each mode has a specific natural frequency, damping ratio and modal vibration shape. By analyzing these modal parameters, the vibration response of the structure under the action of external or internal vibration sources can be understood.

[0118] It should be noted that in the embodiment of the present application, since the flexible bracket is modeled and simulated, the natural frequencies of the flexible bracket simulation model and the vibration modes corresponding to the natural frequencies are obtained. Since the flexible bracket simulation model is a standardized model, and since the flexible bracket is often used and there are problems such as deformation and damage, there are slight differences between the flexible bracket in the actual application scenario and the model, which makes the natural frequencies corresponding to the flexible bracket simulation model and the natural frequencies of the flexible bracket in the actual scenario slightly different. Therefore, the natural frequencies corresponding to the flexible bracket simulation model are called theoretical natural frequencies, and the natural frequencies of the flexible bracket in the actual scenario are called actual natural frequencies. The modal analysis method is used to process the flexible bracket simulation model, and the modal analysis results obtained include the theoretical natural frequencies and the vibration modes corresponding to the theoretical natural frequencies.

[0119] 3) Extracting the first-order natural frequency from the modal analysis result, and using the first-order natural frequency as the vibration frequency.

[0120] Specifically, after obtaining the modal analysis results, in practical applications, since the natural frequency of the structure is only affected by the stiffness distribution and mass distribution, the natural frequency objectively exists when there is no external load excitation; when there is external load excitation, the structure produces a vibration response according to the natural frequency. Although continuous elastic bodies have infinite natural frequencies in theory, usually only low-order natural frequencies are of concern. This is because the lower the natural frequency, the easier it is to be excited by the outside world. Figure 8 This is the first-order overall undulation vibration modal diagram of the flexible bracket, and the natural frequency is 0.75Hz. Under the action of wind load, the first-order vibration mode is easily excited by the outside world. Subsequently, the vibration frequency of the vibration test bench is set to the first-order natural frequency of the flexible bracket in the modal analysis results (that is, the first-order overall undulation vibration natural frequency mentioned above), and the component panel is vibrated at this frequency on the vibration test bench to simulate the vibration frequency of the flexible bracket under wind load excitation.

[0121] 2. The vibration parameters include vibration amplitudes under different vibration modes.

[0122] Specifically, refer to Fig. 9 , determine the parameter values ​​of the vibration parameters of the target panel, including:

[0123] S21. Loading wind pressure time history data onto the component array in the flexible support simulation model to obtain a target simulation model.

[0124] In this embodiment, the target panel will vibrate only when it is excited by the wind load, and then there will be corresponding vibration modes and vibration amplitudes. Therefore, it is necessary to add wind loads to the flexible bracket simulation model to simulate the effect of wind loads.

[0125] Since it is difficult to actually collect wind loads, a wind tunnel experiment can be used to simulate the wind pressure time-history data of the flexible bracket component array, and then the wind pressure time-history data can be loaded onto the component array in the flexible bracket simulation model to obtain a new target simulation model. Subsequently, the dynamic response of the flexible bracket is obtained through a time-domain-based dynamic analysis method.

[0126] S22. Determine a time history curve corresponding to the target simulation model.

[0127] Specifically, the target simulation model is processed using a time-domain-based dynamic analysis method to obtain the dynamic response of the flexible bracket. The dynamic response includes a time history curve, which is divided into two categories:

[0128] The time history curves of the axial force of the component cable and the vertical displacement time history curves of the four corners of the panel.

[0129] Among them, the cable axial force time history curve of the component cable refers to the change of the cable axial force of the component cable over time, specifically refers to the time history data of the cable axial force at different times, and the time history data is sorted by time to form a curve. The vertical displacement time history curve of the four corners of the panel refers to the vertical displacement time history of the four corners of the target panel at different times, and the time history data is sorted by time to form a curve, and the four corners of the panel have their own corresponding curves.

[0130] S23. If the vibration mode is overall motion, calculate the stroke of the first traction device according to the cable axial force time history curve, and use the stroke of the first traction device as the vibration amplitude under the overall motion.

[0131] In practical applications, the movement of the flexible support component panel under wind load is actually the coupling of two movement forms, namely, the overall movement without relative displacement at the four corners of the component panel and the torsional movement with relative displacement at the four corners of the component panel. Corresponding to these two movement forms, there are two potential causes of hidden cracks in the component panel, namely: component tensile cracking caused by the continuous elongation and shortening of the lower cable of the component panel and component torsional cracking caused by the non-coplanarity of the four corners of the component panel.

[0132] In actual scenarios, the overall motion and torsional motion are coupled to each other and act together on the component panel. Therefore, in the test scenario, the vibration amplitudes of the overall motion and torsional motion should be determined separately.

[0133] During the overall movement, the component panel is driven by the component cable and will move accordingly with the wind load. Therefore, when calculating the overall movement, the stroke of the first traction device can be calculated based on the cable axial force time-history curve, and then the stroke of the first traction device can be used as the vibration amplitude under the overall movement.

[0134] In another implementation of the present application, calculating the stroke of the first traction device according to the cable axis force time history curve may include:

[0135] 1) According to the cable axial force time history curve and the initial prestress of the cable, the cable axial force change value is calculated.

[0136] The initial prestress of the cable is the prestress of the component cable when it is initially installed. According to the above discussion, the component cable at the end of the anchor 13 is tensioned by a jack to achieve the prestress of the cable, and the cable force is measured by a dynamometer to obtain the initial prestress of the cable.

[0137] Extract each cable axial force time history F from the cable axial force time history curve, and subtract the initial prestress F from F. 预 , and obtain the cable axial force change ΔF.

[0138] Since a plurality of cable-axial force time histories are extracted from the cable-axial force time-history curve, a plurality of cable-axial force variation values ​​ΔF are also obtained.

[0139] 2) Calculating the cable stress based on the cable axial force change value and the cable cross-sectional area.

[0140] Specifically, the cable cross-sectional area A is obtained, and the cable axial force change value ΔF is divided by the cable cross-sectional area A to obtain the cable stress σ.

[0141] 3) Calculate the cable strain based on the cable stress and the elastic modulus of the cable material.

[0142] Specifically, the cable strain ε can be obtained by dividing the cable stress σ by the elastic modulus E of the cable material.

[0143] 4) Calculate the stroke of the first traction device using the cable strain.

[0144] like Figure 3 As shown, for the component cable, there is a corresponding component cable initial length L, and the component cable initial length L is: the length from the position where the component cable is equipped with a traction device to the component cable installation edge point. The component cable installation edge point is also the short side edge of the test bench.

[0145] In the absence of wind load, the distance between the position of the component cable configuration traction device and the component cable installation edge point is the initial length L of the component cable and remains unchanged. In the presence of wind load, the wind load drives the component cable to move, causing the distance between the position of the component cable configuration traction device and the component cable installation edge point to change, and the change in length is called the elongation of the component cable.

[0146] In the embodiment of the present application, the elongation of the component cable can be calculated according to the cable strain ε and the initial length L of the component cable. In specific implementation, the elongation ΔL of the component cable under the single component panel is obtained by multiplying the cable strain ε and L.

[0147] Then, based on the elongation of the component rope and the initial length of the component rope, the target length of the component rope is calculated.

[0148] Specifically, after the elongation ΔL is obtained, when the elongation of the component cable in the actual model is converted to the vibration test bench, the final target length of the component cable under the wind load is L+ΔL.

[0149] Finally, the first traction device stroke is calculated according to the target length and the initial length of the component rope.

[0150] Specifically, the initial length of the component cable is L, the final target length of the component cable under wind load is L+ΔL, the first traction device stroke of the traction device in the test bench is H1, and the first traction device stroke H1 can be obtained by using the trigonometric function relationship between L and L+ΔL.

[0151] It should be noted that, since there are multiple cable axis force change values ​​ΔF, the largest ΔF can be selected to calculate the first traction device stroke H1, or each ΔF can be used to calculate the first traction device stroke H1, and then the largest H1 can be selected as the final data.

[0152] S24. If the vibration mode is torsional motion, calculate the stroke of the second traction device according to the vertical displacement time history curve, and use the stroke of the second traction device as the vibration amplitude under the torsional motion.

[0153] Under torsional motion, since there will be relative displacement at the four corners of the component panel, the amount of torsion during torsional motion is related to the relative motion of the four corners. Therefore, when calculating the vibration amplitude under torsional motion, the vertical displacement time-history curve of the four corners can be used to calculate the stroke of the second traction device, and the stroke of the second traction device can be used as the vibration amplitude under the torsional motion.

[0154] In another implementation of the present application, calculating the stroke of the second traction device according to the vertical displacement time history curve may include:

[0155] 1) Determine the target plane according to the time history of any three angles in the vertical displacement time history curve.

[0156] In practical applications, the vertical displacement time history curve includes the vertical displacement time histories of the four corners of the target panel at different times. The time history data are sorted by time to form a curve, and each of the four corners of the panel has its own corresponding curve.

[0157] For each moment, the vertical displacement time history of each angle can be extracted from the vertical displacement time history curve, and then three angles can be selected and a plane can be constructed using the vertical displacement moments of these three angles. This plane is the target plane in the embodiment of the present application.

[0158] 2) Calculate the relative distance between another corner of the panel that does not form the target plane and the target plane.

[0159] At this moment, the other corner of the panel that does not form the target plane will have a relative distance relative to the target plane. The relative distance is calculated using mathematical principles and is the torsional motion displacement of the four corners of the component in relative motion.

[0160] For each moment, a torsional motion displacement can be calculated, and for each moment in the vertical displacement time history curve, a corresponding torsional motion displacement can be obtained, that is, the number of torsional motion displacements obtained in this embodiment is multiple.

[0161] 3) Based on the relative distance, determine the second traction device stroke.

[0162] Specifically, by analyzing multiple torsional motion displacements, it was found that the torsional motion displacement with relative movement at the four corners of the panel was small, approximately 10 mm in the entire time range, and the second traction device stroke H2 of the traction device was determined to be 10 mm, that is, the maximum torsional motion displacement was used for testing to detect whether hidden cracks would occur in the panel under harsh environments.

[0163] In the embodiment of the present application, the vibration amplitudes in both overall motion and torsional motion are obtained through the above steps.

[0164] It should be noted that the first traction device stroke H1 and the second traction device stroke H2 are traction strokes of the motor traction device.

[0165] 3. The vibration parameters include the number of vibrations.

[0166] Since the overall motion occurs at a high frequency, the vibration times in the embodiments of the present application are mainly analyzed based on the motion conditions under the overall motion.

[0167] Specifically, determining the parameter value of the vibration parameter of the target panel may include:

[0168] 1) Obtaining a traction device travel curve of a first traction device travel in a preset time period.

[0169] In practical applications, for the overall movement, according to the above discussion, after calculating the first traction device stroke H1, a motor traction device stroke curve within a period of time (such as 150s) can be constructed, as shown in detail. Fig.10shown.

[0170] 2) Statistically analyzing the first traction device stroke in the traction device stroke curve to determine the first traction device stroke and vibration times corresponding to each stroke interval.

[0171] Depend on Fig.10 It can be seen that the maximum value of the overall motion displacement H1 without relative motion at the four corners of the panel is 80mm. 80mm is only the maximum displacement value at a certain point in time. It is not rigorous to use 80mm as the stroke of the motor traction device. To solve this problem, the overall motion displacement, that is, the first traction device stroke H1, is graded, and the number of vibrations in each grade is determined according to the proportion of different grades of stroke time points to the total duration. Assuming that the total number of vibrations is 200,000 times, Table 1 shows the first traction device stroke H1 grades and the corresponding number of vibrations.

[0172] Table 1 The first traction device stroke H1 grades and corresponding vibration times

[0173] Grade <![CDATA[Corresponding displacement value H1]]> Corresponding vibration times 100% guaranteed displacement value ±80mm 10,000 times 95% guaranteed displacement value ±65mm 70,000 times 60% guaranteed displacement value ±50mm 120,000 times

[0174] Among them, the 60% guaranteed displacement value refers to the interval consisting of a stroke range of less than ±50mm, the 95% guaranteed displacement value refers to the interval consisting of a stroke range of ±50mm-±65mm, and the 100% guaranteed displacement value refers to the interval consisting of a stroke range of ±65mm-±80mm.

[0175] That is, the present application is configured with three travel intervals. The number of vibrations in the travel interval below ±50mm is 120,000 times, and the travel of the first traction device is ±50mm. The number of vibrations in the travel interval of ±50mm-±65mm is 70,000 times, and the travel of the first traction device is ±60mm. The number of vibrations in the travel interval of ±65mm-±80mm is 10,000 times, and the travel of the first traction device is ±80mm.

[0176] In the embodiment of the present application, three vibration parameters, namely, vibration frequency, vibration amplitude under different vibration modes, and vibration number, are determined. These vibration parameters can provide a reference for determining subsequent hidden crack test parameters.

[0177] In another embodiment of the present application, according to Figure 3 As shown, in a driving device, such as driving device 1, two traction devices are configured, namely traction device 7 and traction device 8. Among them, traction device 7 can be a first traction device, and traction device 8 can be a second traction device. During the hidden crack test, the traction strokes of the two traction devices need to be determined respectively.

[0178] In addition, the number of the first traction devices and the second traction devices can be increased, such as at least two first traction devices and at least two second traction devices. In this case, at least two first traction devices form a first traction device set, and at least two second traction devices form a second traction device set.

[0179] It can be seen from the above that, in a specific configuration, the traction device includes a first traction device set and a second traction device set; the first traction device set is provided with at least one first traction device; the second traction device set is provided with at least one second traction device.

[0180] At least one first traction device and the second traction device may be symmetrically arranged when they are specifically arranged. When there is at least one first traction device and the second traction device, the calculation process of the traction stroke of each first traction device is the same, and the calculation process of the traction stroke of each second traction device is also the same. The following is a scheme introduction with only one first traction device and one second traction device. At this time, determining the traction stroke of the traction device based on the parameter value of the vibration parameter may include:

[0181] For each travel interval, the sum of the first traction device travel and the second traction device travel corresponding to the travel interval is used as the traction travel of the first traction device, and the first traction device travel corresponding to the travel interval is used as the traction travel of the second traction device.

[0182] In practical applications, since the movement of the flexible support assembly panel under wind load is a coupling of overall movement and torsional movement, both movements need to be considered when determining the traction stroke of the first traction device and the traction stroke of the second traction device.

[0183] When the overall motion is considered, the first traction device stroke of the overall motion can be directly used as the traction stroke of the two traction devices. When the torsional motion is considered, the second traction device stroke of the torsional motion can be assigned to one of the traction devices, and the traction stroke of the other traction device remains unchanged, so as to realize the torsional motion of the four corners of the component panel.

[0184] In the specific implementation, in order to simulate the above two motion forms of the component panel, the vibration test bench is equipped with two sets of driving devices. In the embodiment of the present application, the driving device 2 is selected for testing. The first traction device, such as the traction stroke H of the traction device 7 of the test bench 推杆1 Set to H1+H2, the second traction device, the traction stroke H of the traction device 8 推杆2 Set to H1 to achieve the coupling of the above two forms of motion.

[0185] On the basis of this embodiment, the parameter value of the hidden crack test parameter is determined according to the parameter value of the vibration parameter and the traction stroke of the traction device, including:

[0186] 1) For each travel interval, the vibration frequency in the vibration parameter is used as the vibration frequency corresponding to the travel interval.

[0187] In the actual test scenario, the natural frequency is 0.75Hz according to modal analysis. Under the action of wind load, the first-order vibration mode is easily excited by the outside world. The vibration frequency of the vibration test bench is set to the first-order natural frequency of the flexible bracket, that is, 0.75HZ, and the component panel is vibrated at this frequency on the vibration test bench to simulate the vibration frequency of the flexible bracket under wind load excitation.

[0188] 2) The traction stroke of the first traction device, the traction stroke of the second traction device, the number of vibrations and the vibration frequency corresponding to each of the stroke intervals are used as parameter values ​​of the hidden crack test parameters.

[0189] Specifically, the parameters of the hidden crack test include the traction stroke of the first traction device, the traction stroke of the second traction device, the number of vibrations and the vibration frequency. The specific values ​​are shown in Table 2. Table 2 shows the total traction stroke of the two motor traction devices and the corresponding number of vibrations and vibration frequencies. The two motor traction devices are tractioned synchronously.

[0190] Table 2 The total traction stroke of the two motor traction devices and the corresponding vibration times and vibration frequencies

[0191]

[0192] After obtaining the parameter value of the hidden crack test parameter, the parameter value of the hidden crack test parameter can be used to perform a hidden crack test operation on the target panel to obtain a hidden crack test result. Specifically, according to the parameter value of the hidden crack test parameter, the motor is controlled to drive the first traction device and the second traction device to move, so as to drive the target panel to move.

[0193] Taking the driving device 2 as an example, the motor reducer 6 drives the first traction device (such as the traction device 7) and the second traction device (such as the traction device 8) to move. During the movement, the traction stroke of the first traction device can be controlled to be ±90mm, the traction stroke of the second traction device can be controlled to be ±80mm, the vibration number is 10,000 times, and the vibration frequency is 0.75Hz. After 10,000 vibrations, the traction stroke of the first traction device is controlled to be ±75mm, the traction stroke of the second traction device is controlled to be ±65mm, the vibration number is 70,000 times, and the vibration frequency is 0.75Hz. Finally, the traction stroke of the first traction device is controlled to be ±60mm, the traction stroke of the second traction device is controlled to be ±50mm, the vibration number is 120,000 times, and the vibration frequency is 0.75Hz.

[0194] After the target panel stops moving, the hidden crack test can be ended and the subsequent hidden crack analysis operation can be performed. At this time, the image information of the target panel is collected, and the hidden crack analysis operation is performed on the image information using the EL test to obtain the hidden crack test result.

[0195] Specifically, an EL test is performed before the component hidden crack test to ensure that there are no hidden cracks in the component before the test. Then the test begins. During the test, the cable system tensions the component cable to the initial prestress of the cable, installs the component panel on the vibration test bench, sets the parameters of the hidden crack test parameters, and performs the hidden crack test operation. After the component hidden crack test, an EL test is performed again to observe whether the component has hidden cracks.

[0196] It should be noted that the vibration test bench device in the present application can set different vibration frequencies, vibration forms and vibration amplitudes according to theoretical calculation results when conducting hidden crack tests on photovoltaic modules. Hidden crack tests can be performed on module panels under a variety of wind pressure conditions and array arrangements, and the hidden crack test results can be obtained through EL testing.

[0197] In this embodiment, during the hidden crack test, the wind load is converted into an equivalent up and down movement of the component cable, and the vibration form of the component on the actual flexible support is reproduced on the vibration test bench to ensure that the actual project situation is reproduced during the hidden crack test of the component.

[0198] In addition, the embodiment of the present application determines the vibration frequency of the flexible bracket assembly through a modal analysis method, and determines the vibration form and vibration amplitude of the flexible bracket assembly through a time domain-based dynamic analysis method. The calculated vibration form, vibration frequency and vibration amplitude are consistent with the actual wind pressure and photovoltaic array arrangement of different projects, thereby realizing the simulation of the actual installation scenario during testing.

[0199] Based on the embodiment of the method for testing hidden cracks of a panel of a flexible support assembly, another embodiment of the present application provides a device for testing hidden cracks of a panel of a flexible support assembly, comprising:

[0200] A first parameter determination module 11 is used to determine parameter values ​​of vibration parameters of a target panel;

[0201] A stroke determination module 12, for determining a traction stroke of a traction device based on a parameter value of the vibration parameter; wherein the traction device is used to drive the target panel to move;

[0202] A second parameter determination module 13, used to determine a parameter value of a hidden crack test parameter according to the parameter value of the vibration parameter and the traction stroke of the traction device;

[0203] The hidden crack test module 14 is used to perform a hidden crack test operation on the target panel using the parameter value of the hidden crack test parameter to obtain a hidden crack test result.

[0204] In one implementation, the vibration parameter includes a vibration frequency;

[0205] The first parameter determination module 11 includes:

[0206] A model building submodule is used to build a simulation model of a flexible bracket;

[0207] A modal analysis submodule, used to determine the modal analysis result of the flexible bracket simulation model;

[0208] The frequency extraction submodule is used to extract the first-order natural frequency from the modal analysis result and use the first-order natural frequency as the vibration frequency.

[0209] In one implementation, the vibration parameters include vibration amplitudes under different vibration modes;

[0210] The first parameter determination module 11 includes:

[0211] A data loading submodule, used for loading wind pressure time history data onto the component array in the flexible support simulation model to obtain a target simulation model;

[0212] A curve determination submodule is used to determine the time history curve corresponding to the target simulation model; the time history curve includes the cable axial force time history curve of the component cable and the vertical displacement time history curve of the four corners of the panel;

[0213] A first calculation submodule is used for calculating the stroke of the first traction device according to the cable axis force time history curve if the vibration mode is overall motion, and taking the stroke of the first traction device as the vibration amplitude under the overall motion;

[0214] The second calculation submodule is used to calculate the second traction device stroke according to the vertical displacement time history curve if the vibration mode is torsional motion, and use the second traction device stroke as the vibration amplitude under the torsional motion.

[0215] In one implementation, the first computing submodule includes:

[0216] A cable axial force calculation unit, used for calculating a cable axial force variation value according to the cable axial force time history curve and the initial prestress of the cable;

[0217] A cable stress calculation unit, used for calculating the cable stress based on the cable axial force change value and the cable cross-sectional area;

[0218] A cable strain calculation unit, used for calculating the cable strain according to the cable stress and the elastic modulus of the cable material;

[0219] The stroke calculation unit is used to calculate the stroke of the first traction device using the cable strain.

[0220] In one implementation, the travel calculation unit includes:

[0221] The elongation calculation subunit is used to calculate the elongation of the component cable according to the cable strain and the initial length of the component cable; the initial length of the component cable is: the length from the position where the traction device of the component cable is configured to the installation edge point of the component cable;

[0222] A length calculation subunit, used for calculating a target length of the component cable based on the elongation of the component cable and the initial length of the component cable;

[0223] The stroke calculation subunit is used to calculate the stroke of the first traction device according to the target length and the initial length of the component rope.

[0224] In one implementation, the second computing submodule includes:

[0225] A plane determination unit, used for determining a target plane according to the time history of any three angles in the vertical displacement time history curve;

[0226] A distance calculation unit, used for calculating the relative distance between another corner of the panel that does not form the target plane and the target plane;

[0227] The data calculation unit is used to determine the stroke of the second traction device based on the relative distance.

[0228] In one implementation, the vibration parameter includes the number of vibrations;

[0229] The first parameter determination module 11 includes:

[0230] A curve acquisition submodule, used to acquire a traction device travel curve of a first traction device travel in a preset time period;

[0231] The statistical analysis submodule is used to perform statistical analysis on the first traction device stroke in the traction device stroke curve to determine the first traction device stroke and vibration times corresponding to each stroke interval.

[0232] In one implementation, the traction device includes a first traction device set and a second traction device set; the first traction device set is provided with at least one first traction device; the second traction device set is provided with at least one second traction device; the travel determination module 12 is specifically used for:

[0233] For each travel interval, the sum of the first traction device travel and the second traction device travel corresponding to the travel interval is used as the traction travel of the first traction device, and the first traction device travel corresponding to the travel interval is used as the traction travel of the second traction device.

[0234] In one implementation, the second parameter determination module 13 is specifically used for:

[0235] For each travel interval, the vibration frequency in the vibration parameter is used as the vibration frequency corresponding to the travel interval, and the traction stroke of the first traction device, the traction stroke of the second traction device, the number of vibrations and the vibration frequency corresponding to each travel interval are used as parameter values ​​of the hidden crack test parameters.

[0236] In one implementation, the hidden crack testing module 14 includes:

[0237] A panel movement submodule, used for controlling the motor to drive the first traction device and the second traction device to move according to the parameter value of the hidden crack test parameter, so as to drive the target panel to move;

[0238] An image acquisition submodule, used for acquiring image information of the target panel after the target panel stops moving;

[0239] The hidden crack analysis submodule is used to perform hidden crack analysis operations on the image information to obtain hidden crack test results.

[0240] In this embodiment, the parameter value of the vibration parameter of the target panel is determined, and the traction stroke of the traction device is determined based on the parameter value of the vibration parameter. The parameter value of the hidden crack test parameter is determined according to the parameter value of the vibration parameter and the traction stroke of the traction device. The parameter value of the hidden crack test parameter is used to perform a hidden crack test operation on the target panel to obtain a hidden crack test result, thereby realizing a hidden crack test of the flexible support component panel. Therefore, when the flexible support component panel fails the hidden crack test, the flexible support component panel can be replaced in time to avoid the problem of hidden cracks affecting the power generation and service life of the component after installation and use. In addition, in this application, during the test process, the traction device moves up and down, and the elongation of the component cable installed with the target panel changes accordingly, thereby driving the target panel to move, simulating the wind pressure effect in the actual installation scene and the vibration of the actual component panel when it is subjected to wind pressure, so that the test scene matches the actual installation scene and improves the accuracy of the hidden crack test.

[0241] It should be noted that, for the working process of each module, sub-module, unit and sub-unit in the embodiments of the present application, please refer to the corresponding description in the above embodiments, and will not be repeated here.

[0242] An embodiment of the present application also provides an electronic device, including at least one processor and a memory connected to the processor, wherein:

[0243] The memory is used to store computer programs;

[0244] The processor is used to execute the computer program so that the electronic device can implement the above-mentioned hidden crack testing method for the flexible bracket assembly panel.

[0245] refer to Fig.12 As shown, it shows a schematic diagram of the structure of an electronic device suitable for implementing the embodiments of the present application. The electronic device in the embodiments of the present application may include but is not limited to fixed terminals such as controllers, processors, servers, mobile phones, notebook computers, PDAs (personal digital assistants), PADs (tablet computers), desktop computers, etc. Fig.12 The electronic device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0246] like Fig.12 As shown, the electronic device may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage device 608 into a random access memory (RAM) 603. When the electronic device is powered on, various programs and data required for the operation of the electronic device are also stored in the RAM 603. The processing device 601, the ROM 602, and the RAM 603 are connected to each other via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0247] Typically, the following devices may be connected to the I / O interface 605: an input device 606 including, for example, a touch screen, a touch pad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 607 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 608 including, for example, a memory card, a hard disk, etc.; and a communication device 609. The communication device 609 may allow the electronic device to communicate with other devices wirelessly or by wire to exchange data. Although Fig.12 An electronic device having various devices is shown, but it should be understood that it is not required to implement or possess all the devices shown. More or fewer devices may be implemented or possessed instead.

[0248] Based on the above-mentioned electronic device embodiment, another embodiment of the present invention provides a flexible bracket assembly panel hidden crack test system, including the above-mentioned electronic device, and also including: a test bench; the electronic device can communicate with the motor in the test bench to control the motor to drive the traction device to move, thereby driving the target panel to move and realize hidden crack testing. Please refer to the structure of the test bench Figure 2-6 shown.

[0249] The test bench is used to drive the traction device to move through a motor, so as to drive the target panel to move.

[0250] More specifically, the test bench comprises:

[0251] A first driving device (such as the driving device 1 mentioned above) and a second driving device (such as the driving device 2 mentioned above);

[0252] The first driving device includes a plurality of (specifically, two) single-drive reciprocating motors, and the plurality of single-drive reciprocating motors respectively drive the component rope with the target panel installed to reciprocate up and down through the traction device to realize double-point synchronous drive, double-point asynchronous drive, or single-point drive;

[0253] The second driving device includes a synchronous reciprocating motor, which is connected to the traction device through an adjusting rod to drive the component rope with the target panel installed to reciprocate up and down.

[0254] It should be noted that the specific structure and movement process of the test bench please refer to the above description.

[0255] An embodiment of the present application also provides a computer program product including computer-readable instructions. When the computer-readable instructions are executed on an electronic device, the electronic device implements any method for testing hidden cracks in a flexible bracket assembly panel provided in the embodiment of the present application.

[0256] A computer-readable storage medium is also provided in an embodiment of the present application. The storage medium carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any of the hidden crack testing methods for the flexible bracket component panel provided in the embodiment of the present application.

[0257] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for testing hidden cracks in a flexible support assembly panel, characterized in that: include: determining parameter values ​​of vibration parameters of the target panel; Based on the parameter value of the vibration parameter, determining the traction stroke of the traction device; wherein the traction device is used to drive the target panel to move; Determining a parameter value of a hidden crack test parameter according to the parameter value of the vibration parameter and the traction stroke of the traction device; A hidden crack test operation is performed on the target panel using the parameter value of the hidden crack test parameter to obtain a hidden crack test result.

2. The method for testing hidden cracks of a flexible support assembly panel according to claim 1, characterized in that: The vibration parameters include vibration frequency; Determine the parameter values ​​of the vibration parameters of the target panel, including: Construct a simulation model of a flexible bracket; Determining a modal analysis result of the flexible bracket simulation model; A first-order natural frequency is extracted from the modal analysis result, and the first-order natural frequency is used as the vibration frequency.

3. The method for testing hidden cracks of a flexible support assembly panel according to claim 2, characterized in that: The vibration parameters include vibration amplitudes under different vibration modes; Determine the parameter values ​​of the vibration parameters of the target panel, including: Loading the wind pressure time history data onto the component array in the flexible support simulation model to obtain a target simulation model; Determine a time history curve corresponding to the target simulation model; the time history curve includes a cable axial force time history curve of the component cable and a vertical displacement time history curve of the four corners of the panel; If the vibration mode is overall motion, the stroke of the first traction device is calculated according to the cable axial force time history curve, and the stroke of the first traction device is used as the vibration amplitude under the overall motion; If the vibration mode is torsional motion, the stroke of the second traction device is calculated according to the vertical displacement time history curve, and the stroke of the second traction device is used as the vibration amplitude under the torsional motion.

4. The method for testing hidden cracks of a flexible support assembly panel according to claim 3, characterized in that: Calculating the stroke of the first traction device according to the cable axis force time history curve includes: Calculating the cable axial force change value according to the cable axial force time history curve and the initial prestress of the cable; Calculating the cable stress based on the cable axial force change value and the cable cross-sectional area; Calculating the cable strain according to the cable stress and the elastic modulus of the cable material; The first traction device stroke is calculated using the cable strain.

5. The method for testing hidden cracks of a flexible support assembly panel according to claim 4, characterized in that: Calculating the stroke of the first traction device using the cable strain includes: Calculate the elongation of the component cable according to the cable strain and the initial length of the component cable; the initial length of the component cable is: the length from the position where the traction device of the component cable is configured to the installation edge point of the component cable; Calculating a target length of the component cable based on the elongation of the component cable and the initial length of the component cable; The first traction device stroke is calculated according to the target length and the initial length of the component rope.

6. The method for testing hidden cracks of a flexible support assembly panel according to claim 3, characterized in that: Calculating the stroke of the second traction device according to the vertical displacement time history curve includes: Determining a target plane according to the time histories of any three angles in the vertical displacement time history curve; Calculating the relative distance between another corner of the panel that does not form the target plane and the target plane; Based on the relative distance, a second traction device stroke is determined.

7. The method for testing hidden cracks of a flexible support assembly panel according to claim 3, characterized in that: The vibration parameters include the number of vibrations; Determine the parameter values ​​of the vibration parameters of the target panel, including: Acquire a traction device travel curve of a first traction device travel in a preset time period; A statistical analysis is performed on the first traction device stroke in the traction device stroke curve to determine the first traction device stroke and the vibration times corresponding to each stroke interval.

8. The method for testing hidden cracks of a flexible support assembly panel according to claim 7, characterized in that: The traction device comprises a first traction device set and a second traction device set; the first traction device set is provided with at least one first traction device; the second traction device set is provided with at least one second traction device; Determining a traction stroke of the traction device based on the parameter value of the vibration parameter includes: For each travel interval, the sum of the first traction device travel and the second traction device travel corresponding to the travel interval is used as the traction travel of the first traction device, and the first traction device travel corresponding to the travel interval is used as the traction travel of the second traction device.

9. The method for testing hidden cracks of a flexible support assembly panel according to claim 8, characterized in that: Determining the parameter value of the hidden crack test parameter according to the parameter value of the vibration parameter and the traction stroke of the traction device includes: For each travel interval, the vibration frequency in the vibration parameter is used as the vibration frequency corresponding to the travel interval; The traction stroke of the first traction device, the traction stroke of the second traction device, the number of vibrations and the vibration frequency corresponding to each of the stroke intervals are used as parameter values ​​of the hidden crack test parameters.

10. The method for testing hidden cracks of a flexible support assembly panel according to claim 9, characterized in that: Using the parameter value of the hidden crack test parameter to perform a hidden crack test operation on the target panel to obtain a hidden crack test result, including: According to the parameter value of the hidden crack test parameter, controlling the motor to drive the first traction device and the second traction device to move, so as to drive the target panel to move; After the target panel stops moving, collecting image information of the target panel; A hidden crack analysis operation is performed on the image information to obtain a hidden crack test result.

11. A device for testing hidden cracks in a panel of a flexible support assembly, characterized in that: include: A first parameter determination module, used to determine a parameter value of a vibration parameter of a target panel; A stroke determination module, used to determine the traction stroke of the traction device based on the parameter value of the vibration parameter; wherein the traction device is used to drive the target panel to move; A second parameter determination module, used to determine a parameter value of a hidden crack test parameter according to a parameter value of the vibration parameter and a traction stroke of the traction device; The hidden crack test module is used to perform a hidden crack test operation on the target panel using the parameter value of the hidden crack test parameter to obtain a hidden crack test result.

12. An electronic device, characterized in that: The method comprises at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program so that the electronic device can implement the hidden crack testing method for the flexible bracket assembly panel as described in any one of claims 1 to 10.

13. A system for testing hidden cracks in a flexible support assembly panel, characterized in that: The electronic device according to claim 12 further comprises: a test bench; The test bench is used to drive the traction device to move through a motor, so as to drive the target panel to move.

14. The device for testing hidden cracks of a flexible support assembly panel according to claim 13, characterized in that: The test bench comprises: a first drive device and a second drive device; The first driving device includes a plurality of single-drive reciprocating motors, which respectively drive the component ropes on which the target panels are mounted to reciprocate up and down through the traction device to achieve double-point synchronous driving, double-point asynchronous driving, or single-point driving; The second driving device includes a synchronous reciprocating motor, which is connected to the traction device through an adjusting rod to drive the component rope with the target panel installed to reciprocate up and down.

15. A computer storage medium, characterized in that The storage medium carries one or more computer programs, which, when executed by an electronic device, enable the electronic device to implement the method for testing hidden cracks in a flexible bracket assembly panel as described in any one of claims 1 to 10.

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