Detection method for judging quality of continuously moving metal wire based on vibration signal and related device

Abstract

The invention belongs to the technical field of quality nondestructive testing, and relates to a detection method for judging the quality of a continuously moving metal wire based on a vibration signal and a related device. The detection method comprises the following steps: acquiring vibration time displacement data of a motion bus; processing the vibration time displacement data to obtain bus vibration frequency; taking the vibration frequency of the bus with unqualified quality as a threshold value, comparing the vibration frequency with the actually detected vibration frequency of the bus, and if the actually detected vibration frequency of the bus is greater than the threshold value, judging that the residual stress of the to-be-detected bus is not in a reasonable range, and judging that the quality of the to-be-detected bus is unqualified; otherwise, judging that the to-be-detected bus is qualified. According to the method, real-time, accurate, lossless and efficient detection on the residual stress of the micron-scale ultra-long bus is realized, so that the detection efficiency is improved, the cost is reduced, and the quality of the bus can be ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of non-destructive quality inspection, and particularly relates to a detection method and related device for discriminating the quality of a continuously moving metal wire based on vibration signals. Background Art

[0002] Diamond wire saw is the main method for processing single crystal Si and SiC in the photovoltaic industry and the semiconductor industry. It is formed by electroplating diamond particles on a bus bar, and the bus bar is drawn from high-carbon steel wire. The residual stress during the drawing process is an important factor affecting the quality of the bus bar.

[0003] Currently, enterprises use sampling inspection methods to detect the quality of bus bars. Specifically: in a roll of wire, a section is extracted, cut off, and manually detected by the method of free fall. The defects of this method are: 1. Destructive testing, the cut-off part cannot be used anymore; 2. The sampling inspection method is overgeneralized, estimating the whole roll with the stress of a small section, which is inaccurate; 3. The detection efficiency is low. Using a large number of manual methods to detect by the method of free fall is very time-consuming.

[0004] In addition to the above-mentioned manual methods for detecting the quality of bus bars, there is currently no automated equipment in the photovoltaic industry for detecting the quality of bus bars. Therefore, there is an urgent need for an on-line detection method to achieve real-time, accurate, non-destructive, and efficient detection of the residual stress of ultra-long bus bars at the micron scale, so as to improve the detection efficiency, reduce costs, and ensure the quality of bus bars. Summary of the Invention

[0005] The purpose of the present invention is to provide a detection method and related device for discriminating the quality of a continuously moving metal wire based on vibration signals, which solves the problems of low detection efficiency and inaccurate detection in the existing method that relies on manual sampling inspection to judge whether the quality of the bus bar is qualified.

[0006] The present invention is realized through the following technical solutions: The present invention discloses a detection method for discriminating the quality of a continuously moving metal wire based on vibration signals, including the following steps: S1. Obtain the vibration time-displacement data of the moving bus bar, specifically: Make the bus bar generate a movement route and collect the vibration time-displacement data of the moving bus bar; S2. Process the vibration time-displacement data to obtain the vibration frequency of the bus bar; S3. Take the vibration frequency of the bus bar with unqualified quality as a threshold, and compare it with the vibration frequency of the actually detected bus bar. If the vibration frequency of the actually detected bus bar is greater than the threshold, it is determined that the residual stress of the bus bar to be detected is not within the reasonable range, and the quality of the bus bar to be detected is unqualified; On the contrary, it is determined that the quality of the busbar to be measured is qualified.

[0007] Furthermore, in S2, the vibration time-displacement data is processed to obtain the busbar vibration frequency. The specific calculation expression is:

[0008] Where, is the busbar vibration frequency, is the vibration order, is the busbar length between the two guide rollers, is the busbar density, is the busbar tension.

[0009] Furthermore, the construction process of the busbar vibration frequency calculation expression is as follows: First, draw the force diagram of the micro-element section after the busbar without residual stress vibrates. The resultant force of the busbar tension in the direction is , the slope in the direction is , then the total lateral force caused by the tensile force . Assume that the lateral displacement of the busbar vibrating along the direction is , the density is , then the lateral displacement acceleration is . According to Newton's second law, the lateral force is . Then the system equilibrium equation is: (1) The boundary conditions are: (2) Assume that the deflection function satisfying the boundary conditions is: (3) Where, is the time function, is the vibration order, is the busbar length between the two guide rollers, is the position of a point on the busbar; Substitute Equation (3) into Equation (1) to get: (4) Thus, the natural frequency of the busbar free vibration is obtained as: (5) is the circular frequency. Convert it to the linear frequency to get: (6).

[0010] The present invention also discloses a detection system for discriminating the quality of a continuously moving metal wire based on vibration signals for implementing the detection method, including: A vibration signal input module for acquiring vibration time-displacement data of the moving busbar. A time-frequency conversion module for processing the vibration time-displacement data to obtain the vibration frequency of the busbar. A storage module for storing the vibration frequency of the busbar with unqualified quality. A comparison module for using the vibration frequency of the busbar with unqualified quality as a threshold value to compare with the vibration frequency of the busbar actually detected by the time-frequency conversion module. If the actually detected vibration frequency of the busbar is greater than the threshold value, it is determined that the residual stress of the busbar to be measured is not within a reasonable range and the quality of the busbar to be measured is unqualified; On the contrary, it is determined that the quality of the busbar to be measured is qualified.

[0011] Furthermore, the relationship between the vibration frequency of the busbar and the quality of the busbar is: The greater the vibration frequency of the busbar and the greater the residual stress, the worse the quality of the busbar.

[0012] The present invention also discloses a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the detection method for discriminating the quality of a continuously moving metal wire based on vibration signals are implemented.

[0013] The present invention also discloses a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the steps of the detection method for discriminating the quality of a continuously moving metal wire based on vibration signals are implemented.

[0014] The present invention also discloses a detection device for discriminating the quality of a continuously moving metal wire based on vibration signals, including a busbar winding machine, a bracket, a wire take-up roller, a laser vibrometer, a controller, and a host computer; the laser vibrometer is fixed in the moving line of the busbar of the winding machine through the bracket, and the laser vibrometer is connected to the host computer through the controller; A signal processing module is provided in the host computer; The signal processing module stores the detection system for discriminating the quality of a continuously moving metal wire based on vibration signals; During detection, one end of the busbar to be measured is wound on the busbar winding machine, and the other end is wound on the wire take-up roller.

[0015] Furthermore, the controller adopts the LS-9501 type, is standard with multiple I / O ports, and is respectively connected to the laser vibrometer and the host computer through a measuring head connection cable to realize signal acquisition and transmission.

[0016] The present invention also discloses a working method based on the detection device, comprising the following steps: 1) Install the busbar roller on the rotating shaft of the busbar winding machine, and pull one end of the moving busbar on the busbar roller to the take-up roller through the guide roller; 2) Install the laser vibrometer on the busbar movement path through the bracket so that the laser vibrometer light curtain covers the busbar; 3) Connect the laser vibrometer, controller and host computer to each other through the measuring head connecting cable; 4) Set the running speed of the busbar winding machine, and the laser vibrometer starts to collect the vibration signal of the moving busbar, and then obtain the vibration time displacement data of the moving busbar; 5) The vibration time displacement data of the moving bus is transmitted to the host computer, and the vibration signal is processed by the signal processing module to obtain the bus vibration frequency; 6) The vibration frequency of the busbar with unqualified quality is used as a threshold and compared with the vibration frequency of the detected moving busbar. If the actual detected busbar vibration frequency is greater than the threshold, it is judged that the residual stress of the busbar to be tested is not within a reasonable range and the quality of the busbar to be tested is unqualified; otherwise, the quality of the busbar to be tested is judged to be qualified.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention discloses a detection method for distinguishing the quality of a continuously moving metal wire based on a vibration signal. In the early design and research, it is concluded that the greater the vibration frequency, the greater the residual stress, and the worse the busbar quality. It is proposed to reflect the busbar residual stress through the vibration frequency. Finally, a set of simple and reliable detection methods are designed to directly obtain the vibration signal of the moving busbar, that is, the vibration time displacement data of the moving busbar, convert it into a frequency signal, and use the vibration frequency of the busbar with unqualified quality as a threshold, and compare it with the detected vibration frequency of the moving busbar to determine whether the residual stress of the production busbar is within a reasonable range; if the actual detected busbar vibration frequency is greater than the threshold, it is judged that the residual stress of the busbar to be tested is not within a reasonable range, and the quality of the busbar to be tested is unqualified; otherwise, it is judged that the quality of the busbar to be tested is qualified. The method realizes real-time, accurate, non-destructive and efficient detection of the residual stress of the micrometer-scale ultra-long busbar, so as to improve the detection efficiency, reduce the cost, and ensure the quality of the busbar.

[0018] The present invention also provides a corresponding detection device, including a busbar winding machine, a laser vibrometer bracket, a laser vibrometer, a controller, and a signal processing module; the laser vibrometer is fixed in the movement path of the busbar of the winding machine through the bracket, the controller is connected to the laser vibrometer, and the signal processing module is used to process the vibration signals collected by the laser vibrometer in real time and convert them into frequency signals. The vibration frequency of the busbar with unqualified quality is used as a threshold value, which is compared with the vibration frequency of the moving busbar to be detected to determine whether the residual stress of the produced busbar is within a reasonable range. Relying on existing equipment to build the hardware device for detection, high-speed and high-precision measurement is achieved. Description of the Drawings

[0019] Figure 1 is the vibration signal of the busbar with unqualified quality collected by the laser vibrometer; Figure 2 is Figure 1 the vibration frequency diagram obtained by processing the vibration signal of the busbar with unqualified quality; Figure 3 is the vibration signal of the busbar with qualified quality collected by the laser vibrometer; Figure 4 is Figure 3 the vibration frequency diagram obtained by processing the vibration signal of the busbar with qualified quality; Figure 5 is the force analysis of the busbar by the present invention to explain its measurement principle diagram; Figure 6 is the moving busbar quality detection system based on vibration technology of the present invention; wherein, 1, host computer; 2, controller; 3, laser vibrometer; 4, moving busbar; 5, take-up roller; 6, busbar winding machine control system; 7, bracket; 8, busbar winding machine; Figure 7 is the flow chart of a detection method for discriminating the quality of a continuously moving metal wire based on vibration signals of the present invention; Figure 8 is the vibration time-displacement data of the moving busbar with qualified quality collected by the present invention; Figure 9 is Figure 8 the vibration frequency diagram obtained by time-frequency conversion of the vibration time-displacement data of the moving busbar with qualified quality collected; Figure 10 is the vibration time-displacement data of the moving busbar with unqualified quality collected by the present invention; Figure 11 is Figure 10 the vibration frequency diagram obtained by time-frequency conversion of the vibration data of the vibration time-displacement data of the moving busbar with unqualified quality collected. Detailed Embodiment

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clear, the following further detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments.

[0021] The components described and illustrated in the accompanying drawings and embodiments of the present invention can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present invention provided in the following drawings is not intended to limit the scope of the present invention claimed, but merely represents a selected embodiment of the present invention. Based on the accompanying drawings and embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

[0022] It should be noted that the term "comprising", "including" or any other variant is intended to cover non-exclusive inclusion, such that a process, element, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to the process, element, method, article or device.

[0023] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0024] As Figure 6 shown, the present invention discloses a continuous motion ultra-fine metal wire stress detection device, including a bus winding machine 8, a bracket 7, a laser vibrometer 3, a controller 2 and a host computer 1; the laser vibrometer 3 is fixed in the bus movement line of the winding machine through the bracket 7, the controller 2 is connected to the laser vibrometer 3, and a signal processing module is stored in the host computer 1, and the signal processing module is used to process the vibration signals collected by the laser vibrometer 3 in real time.

[0025] Preferably, the laser vibrometer 3 adopts Keyence LS-9006M ultra-high speed / high-precision micrometer, with a high-speed sampling of 16,000 / second, configured with a special monitoring CMOS, and high-speed and high-precision measurement can be achieved even when the product is tilted, and the maximum light curtain width is 120 mm.

[0026] Preferably, the controller 2 adopts the LS-9501 type, which is standard with multiple I / O ports, and is connected to the laser vibrometer 3 and the host computer 1 respectively through the measuring head connection cable to realize signal acquisition and transmission.

[0027] On the one hand, the controller 2 needs to control the measurement of the laser vibrometer 3, such as inputting the measurement time, measurement mode, etc. On the other hand, it can save the measured data to the computer and import it into other modules for data processing.

[0028] The present invention discloses a method for detecting the residual stress of a continuous moving busbar based on the above device, specifically including the following steps: 1) Install the busbar roller on the rotating shaft of the busbar winding machine 8, and lead one end of the moving busbar 4 wound on the busbar roller to the take-up roller 5 through a guide roller; 2) Install the laser vibrometer 3 on the busbar movement route through the bracket 7, so that the light curtain of the laser vibrometer 3 covers the busbar; 3) Connect the laser vibrometer 3, the controller 2, and the upper computer 1 to each other through a measuring head connection cable; 4) Set the operating speed of the busbar winding machine 8 through the busbar winding machine control system 6, start the equipment, and the laser vibrometer 3 starts to collect the vibration signals of the moving busbar 4, then the vibration time-displacement data of the moving busbar is obtained; 5) Transmit the vibration time-displacement data of the moving busbar into the signal processing module (Matlab running program) for vibration signal processing to obtain the busbar vibration frequency; The signal processing module runs in the Matlab software and includes a vibration signal input module, a time-frequency conversion module, and a result display module. First, run the Matlab script, start to input the vibration time-displacement data of the moving busbar collected by the laser vibrometer 3 in real time, and convert it into a frequency signal through the time-frequency conversion module, and display the frequency value in the display window in real time.

[0029] 6) As Figure 7 shown, use the vibration frequency of the busbar with unqualified quality as the threshold value, compare it with the vibration frequency of the detected moving busbar, and determine that the residual stress of the production busbar is within a reasonable range.

[0030] The concept and principle of the present invention are as follows: The busbar is made by multi-pass drawing. After drawing, there will be residual stress, which is a force existing in the structure itself. The greater the residual stress, the worse the quality of the busbar. The length of a roll of roller busbar is up to 20 km. The residual stress of each section of the busbar fluctuates due to the drawing process. For the same material, when the force is different, the vibration frequency shown will also be different. Therefore, the residual stress of the busbar can be reflected by its vibration frequency.

[0031] During the design, first analyze the differences caused by different residual stresses on the vibration of the busbar: First, cut 60 mother wire segments with a length of 50 cm on the mother wire roller, and let them freely fall from a certain height. Due to the existence of residual stress, the mother wire will bend without other external forces, generating different coil diameters. The smaller the residual stress, the larger the free bending coil diameter of the mother wire, the better the quality, and the less likely it is to break. Through actual production tests, it is found that a bending coil diameter of about 100 mm can meet the production requirements. Therefore, the measured bending coil diameters of the mother wire are divided into two categories. The bending coil diameter range of 95 - 130 mm is called the large coil, and the bending coil diameter range of 49 - 59 mm is called the small coil.

[0032] The residual stress inside the small - coil mother wire is relatively large, and the residual stress inside the large - coil is relatively small. These two coil diameters represent different stress states of the mother wire. Since the vibration natural frequency is a unique property of an object, the same material has different natural frequencies under different stress and constraint conditions. Therefore, the difference in residual stress between the large coil and the small coil can also be reflected by the free vibration of the mother wire. As Figures 1-4 shown, through experimental tests, it is found that the free - vibration natural frequency of the small - coil mother wire is always greater than the vibration frequency of the large - coil mother wire.

[0033] Then, through theoretical verification, it is found that the free - vibration natural frequency of the small - coil mother wire obtained from the experiment is always greater than the vibration frequency of the large - coil mother wire.

[0034] As Figure 5 is the force diagram of a micro - element section of the mother wire after vibration without residual stress. The resultant force of the tension in the direction is , the slope in the direction is , then the total transverse force caused by the tension is . Let the transverse displacement of the mother wire vibrating along the direction be , the density be , then the transverse displacement acceleration is . According to Newton's second law, the transverse force is , then the system equilibrium equation is: (1) The boundary conditions are: (2) Let the deflection function satisfying the boundary conditions be: (3) Among them, is the time function, is the vibration order, is the length of the mother wire between two guide rollers, is the position of a point on the mother wire; Substituting Equation (3) into Equation (1) gives: (4) Thus, the natural frequency of the free vibration of the busbar is obtained as: (5) is the circular frequency, with the unit of , and converting it to the linear frequency ( ) gives: (6) where is the vibration order of the natural frequency.

[0035] It can be seen from Equation (6) that the greater the residual stress, the greater the tensile force T, and the greater the value of the natural frequency. Combining this with the relationship with the busbar coil diameter, it can be obtained that the larger the busbar coil diameter, the better the quality and the smaller the vibration frequency. Therefore, the vibration frequency that does not meet the production quality of the busbar can be used as a threshold. When it is detected that the vibration frequency of the busbar is greater than this threshold, it can be considered that the quality of this section of the busbar is unqualified, and thus the machine is stopped for inspection and the process parameters are adjusted.

[0036] Applying the conclusions obtained from theory and experiment to the actual busbar quality detection, specifically: A detection system for discriminating the quality of continuously moving metal wires based on vibration signals is built in Matlab software. The detection system includes a vibration signal input module, a time-frequency conversion module, a storage module, and a comparison module. The vibration signal input module supports real-time input of the vibration time-displacement data of the moving busbar collected by the laser vibrometer 3. The time-frequency conversion module is used to process the vibration time-displacement data to obtain the vibration frequency of the busbar. The storage module is used to store the vibration frequencies of the busbars with unqualified quality.

[0037] The comparison module is used to use the vibration frequency of the busbar with unqualified quality as a threshold and compare it with the vibration frequency of the busbar actually detected by the time-frequency conversion module. If the vibration frequency of the busbar actually detected is greater than the threshold, it is determined that the residual stress of the busbar to be measured is not within the reasonable range and the quality of the busbar to be measured is unqualified; otherwise, it is determined that the quality of the busbar to be measured is qualified.

[0038] The invention realizes a method for real-time, accurate, non-destructive, and efficient detection of the residual stress of ultra-long busbars at the micron scale, so as to improve the detection efficiency, reduce the cost, and ensure the quality of the busbars.

[0039] As Figure 8 shown, the vibration time-displacement data collected by the laser vibrometer 3 when the moving speed of the busbar with qualified quality is 4 m / s and the tension is 0.8095 N, Figure 9 is the vibration frequency diagram obtained through the time-frequency conversion module; Figure 10The following shows the vibration time-displacement data collected by the laser vibrometer 3 when the speed of the busbar with unqualified quality is 4 m / s and the tension is 0.8187 N. Figure 11 It is the vibration frequency diagram obtained through the time-frequency conversion module. From Figure 11 and Figure 9 it can be seen that both the vibration frequency and amplitude of the busbar with unqualified quality are greater than those of the busbar with qualified quality.

[0040] The detection method for discriminating the quality of continuously moving metal wires based on vibration signals in the present invention can be implemented in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can be in the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) containing computer-usable program codes.

[0041] If the detection method for discriminating the quality of continuously moving metal wires based on vibration signals in the present invention is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, to implement all or part of the processes in the above-mentioned embodiment methods of the present invention, it can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned various method embodiments can be implemented. Among them, the computer program includes computer program codes, and the computer program codes can be in the form of source code, object code, executable files, or some intermediate forms, etc. The computer-readable storage medium includes permanent and non-permanent, removable and non-removable media, and information storage can be achieved by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals. Among them, the computer storage medium can be any available medium or data storage device accessible by a computer, including but not limited to magnetic memories (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical memories (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor memories (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NANDFLASH), solid-state drives (SSD)), etc.

[0042] In an exemplary embodiment, a computer device is further provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the detection method for discriminating the quality of a continuously moving metal wire based on vibration signals are implemented. The processor may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific embodiments of the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A detection method for determining the quality of a continuously moving metal wire based on a vibration signal, characterized in that: The following steps are involved: S1. Obtain the vibration time displacement data of the motion busbar, specifically: Make the busbar generate a moving route and collect the vibration time displacement data of the moving busbar; S2, processing the vibration time displacement data to obtain the busbar vibration frequency; S3, taking the busbar vibration frequency of unqualified quality as a threshold, and comparing it with the busbar vibration frequency actually detected, if the busbar vibration frequency actually detected is greater than the threshold, it is judged that the residual stress of the busbar to be tested is not within a reasonable range, and the quality of the busbar to be tested is unqualified; Otherwise, the quality of the busbar to be tested is judged to be qualified.

2. A detection method for determining the quality of a continuously moving metal wire based on a vibration signal according to claim 1, characterized in that: In S2, the vibration time displacement data is processed to obtain the busbar vibration frequency. The specific calculation expression is: in, is the busbar vibration frequency, is the vibration order, is the generatrix length between the two guide rollers, is the busbar density, is the busbar tension.

3. A detection method for determining the quality of a continuously moving metal wire based on a vibration signal according to claim 2, characterized in that: The construction process of the busbar vibration frequency calculation expression is: First draw the force diagram of the microelement segment after the vibration of the busbar without residual stress, and the busbar tension exist The resultant force in the direction is , The slope of the direction is , then the tension The total lateral force caused is , assuming the busbar is The lateral displacement to vibration is , the density is , then the lateral displacement acceleration is According to Newton's second law, the lateral force is , then the system equilibrium equation is: （1） The boundary conditions are: （2） Assume that the deflection function that satisfies the boundary conditions is for: （3） in, is a function of time, is the vibration order, is the generatrix length between the two guide rollers, is the position of a point on the busbar; Substituting formula (3) into formula (1), we get: （4） The natural frequency of the busbar free vibration is obtained as follows: （5） is the circular frequency, convert it to the linear frequency, and we get: （6）。 4. A detection system for determining the quality of a continuously moving metal wire based on a vibration signal, which implements the detection method described in any one of claims 1 to 3, characterized in that: include: A vibration signal input module is used to obtain the vibration time displacement data of the moving busbar; The time-frequency conversion module is used to process the vibration time displacement data to obtain the busbar vibration frequency; A storage module, used for storing busbar vibration frequencies of unqualified quality; A comparison module is used to use the busbar vibration frequency of unqualified quality as a threshold value and compare it with the busbar vibration frequency actually detected by the time-frequency conversion module. If the busbar vibration frequency actually detected is greater than the threshold value, it is judged that the residual stress of the busbar to be tested is not within a reasonable range and the quality of the busbar to be tested is unqualified; Otherwise, the quality of the busbar to be tested is judged to be qualified.

5. The detection system for determining the quality of a continuously moving metal wire based on a vibration signal according to claim 4, characterized in that: The relationship between busbar vibration frequency and busbar mass is: The greater the busbar vibration frequency, the greater the residual stress and the worse the busbar quality.

6. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the detection method for determining the quality of a continuously moving metal wire based on a vibration signal as described in any one of claims 1 to 3 are implemented.

7. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the detection method for determining the quality of a continuously moving metal wire based on a vibration signal as claimed in any one of claims 1 to 3 are implemented.

8. A detection device for determining the quality of a continuously moving metal wire based on a vibration signal, characterized in that: It comprises a busbar winding machine (8), a bracket (7), a take-up roller (5), a laser vibrometer (3), a controller (2) and a host computer (1); the laser vibrometer (3) is fixed in the busbar motion circuit of the winding machine via the bracket (7), and the laser vibrometer (3) is connected to the host computer (1) via the controller (2); The host computer (1) is provided with a signal processing module; The signal processing module stores the detection system for determining the quality of a continuously moving metal wire based on a vibration signal as described in claim 4 or 5; During testing, one end of the busbar to be tested is wound in a busbar winding machine (8), and the other end is wound on a take-up roller (5).

9. The detection device for determining the quality of a continuously moving metal wire based on a vibration signal according to claim 8, characterized in that: The controller (2) is of LS-9501 type and is equipped with multiple I / O ports as standard. It is connected to the laser vibrometer (3) and the host computer (1) through the measuring head connecting cable to realize signal collection and transmission.

10. A working method of the detection device according to claim 8 or 9, characterized in that: The following steps are involved: 1) Installing a busbar roller on the rotating shaft of a busbar winding machine (8), and pulling one end of the moving busbar (4) on the busbar roller to a take-up roller (5) via a guide roller; 2) Installing the laser vibrometer (3) on the moving path of the busbar via the bracket (7) so that the light curtain of the laser vibrometer (3) covers the busbar; 3) connecting the laser vibrometer (3), the controller (2) and the host computer (1) to each other via a measuring head connecting cable; 4) setting the running speed of the busbar winding machine (8), and the laser vibrometer (3) starts collecting the vibration signal of the moving busbar (4), thereby obtaining the vibration time displacement data of the moving busbar; 5) The vibration time displacement data of the moving busbar is transmitted to the upper computer (1), and the vibration signal is processed by the signal processing module to obtain the busbar vibration frequency; 6) The vibration frequency of the busbar with unqualified quality is used as a threshold and compared with the vibration frequency of the detected moving busbar. If the actual detected busbar vibration frequency is greater than the threshold, it is judged that the residual stress of the busbar to be tested is not within a reasonable range and the quality of the busbar to be tested is unqualified; otherwise, the quality of the busbar to be tested is judged to be qualified.

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