Evaluation method, system and calibration board of winding machine image acquisition system

Abstract

The present application provides an evaluation method, system and calibration plate of a winding machine image acquisition system, the method comprising: when the winding machine winds the battery cell to a first preset number of layers, and at least one calibration plate corresponding to a black rectangle with a standard width is placed within the camera field of view, the image acquisition system is controlled by a PLC to perform edge grabbing processing on the black rectangle to generate a first grabbing frame to determine the target width corresponding to each black rectangle; when the winding machine winds the battery cell to any second preset number of layers among M second preset numbers of layers, the camera is controlled by a PLC to continuously shoot N first images, the image acquisition system performs edge grabbing processing on the pole piece, diaphragm and ceramic layer in each first image to generate M groups of second grabbing frames corresponding to N first images; and the width data including the standard width and the target width and the data corresponding to the second grabbing frame are evaluated. In this way, the data required for the evaluation is automatically obtained, the operation process is simplified, and the evaluation efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of winding machine detection, and in particular to an evaluation method, system and calibration board for a winding machine image acquisition system. Background Art

[0002] With the widespread application of power batteries, in order to ensure the safety of batteries, the quality requirements in manufacturing are becoming more and more stringent. During the winding process, multiple tests need to be performed on the wound battery cells. The image acquisition system may be affected by the external environment during the actual measurement process, resulting in measurement accuracy that is difficult to meet the test requirements. Therefore, it is necessary to evaluate and analyze the image acquisition system to ensure that the image acquisition system is reliable. At present, measurement system analysis (MSA) is often used to evaluate the image acquisition system. However, the data required for the evaluation usually requires frequent manual operation of the winding machine and repeated transcription of the image acquisition system data to obtain, resulting in cumbersome evaluation operations and low efficiency. Summary of the invention

[0003] The embodiments of the present application provide an evaluation method, system and calibration board for a winding machine image acquisition system to solve the technical problem that the evaluation operation of the winding machine image acquisition system is complicated and inefficient.

[0004] In a first aspect, an embodiment of the present application provides an evaluation method for a winding machine image acquisition system, wherein the image acquisition system includes at least one camera, and the winding machine is used to wind a battery cell, wherein the battery cell includes a pole piece, a diaphragm, and a ceramic layer, and the method includes:

[0005] When the winding machine winds the battery cell to a first preset number of layers, and a preset calibration plate is placed within the field of view of the camera, and the calibration plate includes at least one black rectangle, and each black rectangle has a corresponding standard width, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on the at least one black rectangle to generate a first edge grabbing frame;

[0006] Determine, according to the first grab frame, a target width corresponding to each black rectangle in at least one black rectangle;

[0007] When the winding machine winds the battery cell to any second preset number of layers among M second preset numbers of layers, the programmable logic controller controls the camera to continuously capture N first images, and the image acquisition system performs edge grabbing processing on the pole piece, the diaphragm and the ceramic layer in each first image to generate M groups of second grabbing frames corresponding to the N first images, where N and M are integers greater than 1;

[0008] The width data and the data corresponding to the second grab frame are evaluated, wherein the width data includes a standard width and a target width corresponding to each black rectangle.

[0009] In this way, when the winding machine winds to a certain extent, the preset calibration plate can be placed in the field of view of the camera in the image acquisition system, and the image acquisition system can be controlled by the programmable logic controller to automatically perform edge grabbing processing on the black rectangle corresponding to the standard width in the calibration plate, so as to calculate the target width and obtain width data including the standard width and the target width. The camera can be controlled by the programmable logic controller to automatically trigger multiple shots of the battery cell, and the image acquisition system can perform edge grabbing processing on the pole piece, diaphragm and ceramic layer in the first image taken, and obtain data corresponding to the second grabbing frame that meets repeatability and reproducibility. Therefore, there is no need to manually operate the winding machine frequently and repeatedly copy the data of the image acquisition system, and the calibrated width data and the data corresponding to the second grabbing frame that meets repeatability and reproducibility can be obtained, and the image acquisition system can be evaluated based on these data, which simplifies the evaluation operation process and effectively improves the evaluation efficiency.

[0010] In some embodiments, controlling the image acquisition system through a programmable logic controller to perform edge capture processing on at least one black rectangle to generate a first edge capture frame includes:

[0011] Controlling the camera to shoot based on the calibration plate through a programmable logic controller to obtain a second image;

[0012] The image acquisition system performs edge capture processing on at least one black rectangle in the second image to generate a first edge capture frame, wherein the frame of at least one black rectangle extending along the first direction is parallel to the frame of the second image extending along the first direction, and the frame of at least one black rectangle extending along the second direction is parallel to the frame of the second image extending along the second direction, and the first direction and the second direction are perpendicular to each other.

[0013] In this way, the calibration plate can be placed horizontally in the field of view of the camera, so that any border of the black rectangle is parallel to the border extending in the same direction in the second image taken by the camera, so as to generate a more accurate first capture border, thereby ensuring the accuracy of the target width and further improving the accuracy of the image acquisition system evaluation.

[0014] In some embodiments, determining, according to the first gripping frame, a target width corresponding to each black rectangle in at least one black rectangle includes:

[0015] For each black rectangle, determine the pixel coordinates of two first grabbing frames corresponding to the black rectangle;

[0016] According to the pixel coordinates, determine the target width corresponding to the black rectangle.

[0017] In this way, the pixel coordinates of each first grabbing frame can be determined, so that the target width of the black rectangle can be calculated based on the two first grabbing frames corresponding to each black rectangle, so that the calibrated width data can be subsequently formed based on the target width and the standard width for evaluating the image acquisition system.

[0018] In some embodiments, a positioning mark is further provided on the calibration plate, and the positioning mark is used to indicate the position of at least one black rectangle;

[0019] The programmable logic controller is used to control the image acquisition system to perform edge capture processing on at least one black rectangle to generate a first edge capture frame, including:

[0020] Controlling the image acquisition system to identify the positioning mark through the programmable logic controller, and determining the position of at least one black rectangle according to the identified positioning mark;

[0021] The image acquisition system performs edge capture processing on at least one black rectangle according to the position of at least one black rectangle to generate a first edge capture frame.

[0022] In this way, the position of the black rectangular frame can be determined according to the positioning mark on the calibration plate, so that the image acquisition system can generate a more accurate first capture frame according to the position, thereby ensuring the accuracy of the target width and further improving the accuracy of the image acquisition system evaluation.

[0023] In some embodiments, a standard distance corresponds to between the positioning mark and each black rectangle, and the standard distances between the positioning mark and different black rectangles are different;

[0024] The programmable logic controller is used to control the image acquisition system to identify the positioning mark, and the position of at least one black rectangle is determined according to the identified positioning mark, including:

[0025] The image acquisition system is controlled by a programmable logic controller to identify the positioning mark to determine the position of the positioning mark;

[0026] The position of each black rectangle is determined according to the position of the positioning mark and the corresponding standard distance between the positioning mark and each black rectangle, and the position of at least one black rectangle is obtained.

[0027] In this way, the position of each black rectangle can be calculated based on the position of the positioning marker and the corresponding standard distance between the positioning marker and each black rectangle, so that the image acquisition system can generate a more accurate first capture frame based on the position, thereby ensuring the accuracy of the target width and further improving the accuracy of the image acquisition system evaluation.

[0028] In some embodiments, when the winding machine winds the battery cell to a first preset number of layers and a preset calibration plate is placed within the field of view of the camera, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on at least one black rectangle to generate a first edge grabbing frame, including:

[0029] When the winding machine winds the battery cell to a first preset number of layers and the calibration plate is placed at the center of the camera's field of view, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on at least one black rectangle to generate a first edge grabbing frame.

[0030] In this way, by placing the calibration plate at the center of the camera's field of view, it can be ensured that the camera can capture an image containing the entirety of the calibration plate, thereby further ensuring the accuracy of the first capture frame.

[0031] In some embodiments, when the winding machine winds the battery cell to a first preset number of layers and a preset calibration plate is placed within the field of view of the camera, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on at least one black rectangle to generate a first edge grabbing frame, including:

[0032] When the winding machine winds the battery cell to half of the total number of layers and the calibration plate is placed within the field of view of the camera, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on at least one black rectangle to generate a first edge grabbing frame.

[0033] In this way, when the winding machine winds the battery cell to the middle layer, the winding state is usually relatively stable. Obtaining the data required for evaluation at this time can reduce the impact of other factors on the data, thereby ensuring that the data can more accurately reflect the actual situation of the image acquisition system and improve the accuracy of the evaluation.

[0034] In some embodiments, the width data and the data corresponding to the second gripping frame are evaluated, including:

[0035] The width data and the data corresponding to the second grab frame are saved as target data in a preset format;

[0036] Input the target data into the measurement system analysis system to obtain the evaluation results of the image acquisition system.

[0037] In this way, the data can be directly saved as target data in a preset format, so that the image acquisition system can be directly input into the measurement system analysis system based on the target data in the preset format to evaluate the image acquisition system, further improving the convenience and efficiency of the evaluation.

[0038] In some embodiments, the width data and the data corresponding to the second frame are saved as target data in a preset format, including:

[0039] Obtaining a table template of a preset format, the table template comprising a plurality of cells, each cell being associated with a first identifier;

[0040] Read the first identifier associated with each cell in the table template, and the second identifier associated with each data in the width data and the data corresponding to the second frame;

[0041] According to the correspondence between the first identifier associated with each cell and the second identifier associated with each data, the width data and the data corresponding to the second grab frame are filled into the table template to obtain the target data and save it.

[0042] In this way, the width data and the data corresponding to the second grab frame can be filled in a table template of a preset format to obtain target data that meets the requirements of the preset format, so that the image acquisition system can be evaluated directly based on the target data input into the measurement system analysis system, further improving the convenience and efficiency of the evaluation.

[0043] In a second aspect, an embodiment of the present application further provides an evaluation system for a winding machine image acquisition system, the image acquisition system comprising at least one camera, the winding machine is used to wind a battery cell, the battery cell comprises a pole piece, a diaphragm and a ceramic layer, and the system comprises:

[0044] A first generating module is used to control the image acquisition system through a programmable logic controller to perform edge grabbing processing on at least one black rectangle to generate a first grabbing frame when the winding machine winds the battery cell to a first preset number of layers and a preset calibration plate is placed within the field of view of the camera, the calibration plate includes at least one black rectangle, and each black rectangle corresponds to a standard width;

[0045] A determination module, configured to determine a target width corresponding to each black rectangle in at least one black rectangle according to the first grasping frame;

[0046] A second generation module is used to control the camera to continuously capture N first images through a programmable logic controller when the winding machine winds the battery cell to any second preset number of layers among M second preset numbers of layers, and the image acquisition system performs edge grabbing processing on the pole piece, the diaphragm and the ceramic layer in each first image to generate M groups of second grabbing frames corresponding to the N first images, where N and M are integers greater than 1;

[0047] The evaluation module is used to evaluate the width data and the data corresponding to the second grabbing frame, wherein the width data includes the standard width and the target width corresponding to each black rectangle.

[0048] In this way, when the winding machine winds to a certain extent, the preset calibration plate can be placed in the field of view of the camera in the image acquisition system, and the image acquisition system can be controlled by the programmable logic controller to automatically perform edge grabbing processing on the black rectangle corresponding to the standard width in the calibration plate, so as to calculate the target width and obtain width data including the standard width and the target width. The camera can be controlled by the programmable logic controller to automatically trigger multiple shots of the battery cell, and the image acquisition system can perform edge grabbing processing on the pole piece, diaphragm and ceramic layer in the first image taken, and obtain data corresponding to the second grabbing frame that meets repeatability and reproducibility. Therefore, there is no need to manually operate the winding machine frequently and repeatedly copy the data of the image acquisition system, and the calibrated width data and the data corresponding to the second grabbing frame that meets repeatability and reproducibility can be obtained, and the image acquisition system can be evaluated based on these data, which simplifies the evaluation operation process and effectively improves the evaluation efficiency.

[0049] In some embodiments, the first generating module is further configured to:

[0050] Controlling the camera to shoot based on the calibration plate through a programmable logic controller to obtain a second image;

[0051] The image acquisition system performs edge capture processing on at least one black rectangle in the second image to generate a first edge capture frame, wherein the frame of at least one black rectangle extending along the first direction is parallel to the frame of the second image extending along the first direction, and the frame of at least one black rectangle extending along the second direction is parallel to the frame of the second image extending along the second direction, and the first direction and the second direction are perpendicular to each other.

[0052] In this way, the calibration plate can be placed horizontally in the field of view of the camera, so that any border of the black rectangle is parallel to the border extending in the same direction in the second image taken by the camera, so as to generate a more accurate first capture border, thereby ensuring the accuracy of the target width and further improving the accuracy of the image acquisition system evaluation.

[0053] In some embodiments, the determining module is further configured to:

[0054] For each black rectangle, determine the pixel coordinates of two first grabbing frames corresponding to the black rectangle;

[0055] According to the pixel coordinates, determine the target width corresponding to the black rectangle.

[0056] In this way, the pixel coordinates of each first grabbing frame can be determined, so that the target width of the black rectangle can be calculated based on the two first grabbing frames corresponding to each black rectangle, so that the calibrated width data can be subsequently formed based on the target width and the standard width for evaluating the image acquisition system.

[0057] In some embodiments, a positioning mark is further provided on the calibration plate, and the positioning mark is used to indicate the position of at least one black rectangle;

[0058] The first generation module also includes:

[0059] A determination unit, used to control the image acquisition system to identify the positioning mark through a programmable logic controller, and determine the position of at least one black rectangle according to the identified positioning mark;

[0060] The generating unit is used for the image acquisition system to perform edge grabbing processing on at least one black rectangle according to the position of at least one black rectangle to generate a first edge grabbing frame.

[0061] In this way, the position of the black rectangular frame can be determined according to the positioning mark on the calibration plate, so that the image acquisition system can generate a more accurate first capture frame according to the position, thereby ensuring the accuracy of the target width and further improving the accuracy of the image acquisition system evaluation.

[0062] In some embodiments, a standard distance corresponds to between the positioning mark and each black rectangle, and the standard distances between the positioning mark and different black rectangles are different;

[0063] The determination unit is also used to:

[0064] The image acquisition system is controlled by a programmable logic controller to identify the positioning mark to determine the position of the positioning mark;

[0065] The position of each black rectangle is determined according to the position of the positioning mark and the corresponding standard distance between the positioning mark and each black rectangle, and the position of at least one black rectangle is obtained.

[0066] In this way, the position of each black rectangle can be calculated based on the position of the positioning marker and the corresponding standard distance between the positioning marker and each black rectangle, so that the image acquisition system can generate a more accurate first capture frame based on the position, thereby ensuring the accuracy of the target width and further improving the accuracy of the image acquisition system evaluation.

[0067] In some embodiments, the first generating module is further configured to:

[0068] When the winding machine winds the battery cell to a first preset number of layers and the calibration plate is placed at the center of the camera's field of view, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on at least one black rectangle to generate a first edge grabbing frame.

[0069] In this way, by placing the calibration plate at the center of the camera's field of view, it can be ensured that the camera can capture an image containing the entirety of the calibration plate, thereby further ensuring the accuracy of the first capture frame.

[0070] In some embodiments, the first generating module is further configured to:

[0071] When the winding machine winds the battery cell to half of the total number of layers and the calibration plate is placed within the field of view of the camera, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on at least one black rectangle to generate a first edge grabbing frame.

[0072] In this way, when the winding machine winds the battery cell to the middle layer, the winding state is usually relatively stable. Obtaining the data required for evaluation at this time can reduce the impact of other factors on the data, thereby ensuring that the data can more accurately reflect the actual situation of the image acquisition system and improve the accuracy of the evaluation.

[0073] In some embodiments, the evaluation module further includes:

[0074] A saving unit, used for saving the width data and the data corresponding to the second grabbing frame as target data in a preset format;

[0075] The evaluation unit is used to input the target data into the measurement system analysis system to obtain the evaluation results of the image acquisition system.

[0076] In this way, the data can be directly saved as target data in a preset format, so that the image acquisition system can be directly input into the measurement system analysis system based on the target data in the preset format to evaluate the image acquisition system, further improving the convenience and efficiency of the evaluation.

[0077] In some embodiments, the storage unit is further configured to:

[0078] Obtaining a table template of a preset format, the table template comprising a plurality of cells, each cell being associated with a first identifier;

[0079] Read the first identifier associated with each cell in the table template, and the second identifier associated with each data in the width data and the data corresponding to the second frame;

[0080] According to the correspondence between the first identifier associated with each cell and the second identifier associated with each data, the width data and the data corresponding to the second grab frame are filled into the table template to obtain the target data and save it.

[0081] In this way, the width data and the data corresponding to the second grab frame can be filled in a table template of a preset format to obtain target data that meets the requirements of the preset format, so that the image acquisition system can be evaluated directly based on the target data input into the measurement system analysis system, further improving the convenience and efficiency of the evaluation.

[0082] In a third aspect, the embodiment of the present application further provides a calibration plate, which is applied to the evaluation method of the winding machine image acquisition system in the first aspect, comprising:

[0083] ontology;

[0084] At least one black rectangle is disposed on the body, and each black rectangle has a corresponding standard width;

[0085] At least two black rectangle groups are arranged on the body, each black rectangle group includes a plurality of black rectangles spaced apart along a first direction, the side length of the black rectangle extending along the first direction is a standard width, the side length of the black rectangle extending along the second direction is a standard length, and the first direction and the second direction are perpendicular to each other;

[0086] Among them, the standard widths corresponding to any two black rectangles in each black rectangle group are different, and the standard lengths corresponding to any two black rectangles are the same.

[0087] In this way, when the winding machine is wound to a certain extent, the calibration plate can be placed in the field of view of the camera in the image acquisition system, and the image acquisition system can be controlled by the programmable logic controller to automatically perform edge processing on the black rectangles corresponding to the standard width in the calibration plate, so as to calculate the target width and obtain width data including the standard width and the target width. There is no need to manually operate the winding machine frequently and repeatedly copy the data of the image acquisition system to obtain the calibrated width data in the evaluation, which simplifies the evaluation operation process and effectively improves the evaluation efficiency. And by setting a plurality of black rectangles of different standard widths on the calibration plate, the number of black rectangles will not be too small, which will affect the extensiveness of the data, nor will it be too much, which will increase the computing power cost, so that the width data obtained is more reasonable.

[0088] In some embodiments, the calibration plate further comprises:

[0089] The positioning mark is arranged on the main body, and a standard distance corresponds to each black rectangle between the positioning mark and each black rectangle, and the standard distances between the positioning mark and different black rectangles are different.

[0090] In this way, the positioning mark can be used to assist in the positioning of the black rectangle, so as to ensure that a more accurate first grasping frame can be generated during subsequent use, thereby improving the accuracy of the evaluation.

[0091] In some embodiments, the positioning mark includes at least one positioning hole.

[0092] In this way, the position of the black rectangle can be located through the positioning hole, and the structure is simple and the operation is convenient.

[0093] In some embodiments, the positioning mark includes a first positioning hole and a second positioning hole, the first positioning hole and the second positioning hole are symmetrically arranged on both sides of the body, and at least one black rectangle is arranged in the middle area of ​​the body.

[0094] In this way, the number of the positioning holes is two, and they are respectively located on both sides of the black rectangle, which can further improve the positioning accuracy of the black rectangle.

[0095] In some embodiments, the positioning mark includes a first positioning hole and a second positioning hole, the first positioning hole and the second positioning hole are respectively arranged at two opposite corners of the body, and at least one black rectangle is arranged in the middle area of ​​the body.

[0096] In this way, the number of the positioning holes is two, and they are respectively located at two opposite corners of the black rectangle, which can further improve the positioning accuracy of the black rectangle.

[0097] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising: a processor and a memory storing program instructions; when the processor executes the program instructions, the method of the first aspect is implemented.

[0098] In a fifth aspect, an embodiment of the present application provides a machine-readable storage medium having program instructions stored thereon, and the method of the first aspect is implemented when the program instructions are executed by a processor.

[0099] In a sixth aspect, an embodiment of the present application provides a computer program product. When instructions in the computer program product are executed by a processor of an electronic device, the electronic device executes the method of the first aspect.

[0100] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0101] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0102] Figure 1a A schematic diagram of the structure of a calibration plate provided in an embodiment of the present application;

[0103] Figure 1b Another structural schematic diagram of the calibration plate provided in the embodiment of the present application;

[0104] Figure 2 A schematic diagram of a flow chart of an evaluation method for a winding machine image acquisition system provided in an embodiment of the present application;

[0105] Figure 3 A schematic diagram of the structure of a camera and a winder in the evaluation method of a winder image acquisition system provided in an embodiment of the present application;

[0106] Figure 4 A schematic diagram of camera imaging in the evaluation method of the winding machine image acquisition system provided in an embodiment of the present application;

[0107] Figure 5 A schematic diagram of the placement of the calibration plate in the evaluation method of the winding machine image acquisition system provided in an embodiment of the present application;

[0108] Figure 6 A schematic diagram of a first grabbing frame in the evaluation method of the winding machine image acquisition system provided in an embodiment of the present application;

[0109] Figure 7 A schematic diagram of a second grabbing frame in the evaluation method of the winding machine image acquisition system provided in an embodiment of the present application;

[0110] Figure 8 A schematic flow chart of a specific scenario embodiment of the evaluation method of the winding machine image acquisition system provided in the embodiment of the present application;

[0111] Fig. 9 A flowchart of another specific scenario embodiment of the evaluation method of the winding machine image acquisition system provided in the embodiment of the present application;

[0112] Fig.10 A schematic diagram of the structure of an evaluation device for a winding machine image acquisition system provided in an embodiment of the present application;

[0113] Fig.11 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0114] In the drawings, the drawings are not drawn to scale.

[0115] Reference numerals:

[0116] 100, calibration plate; 101, body; 102, black rectangle; 103, positioning mark; 1031, first positioning hole; 1032, second positioning hole;

[0117] 300, winding machine; 310, camera; 301, diaphragm; 302, anode sheet; 303, cathode sheet; 304, ceramic layer;

[0118] 600, first grabbing frame; 700, second grabbing frame. DETAILED DESCRIPTION

[0119] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0120] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0121] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0122] In related technologies, with the widespread application of power batteries, in order to ensure the safety of batteries, the quality requirements in manufacturing are becoming more and more stringent. During the winding process, multiple tests need to be performed on the wound battery cells. Defective battery cells flowing to the next process are very likely to cause safety accidents. Therefore, reliable detection methods are needed during the winding process to achieve the purpose of real-time monitoring. Generally, image acquisition systems, such as charge coupled device (CCD) measurement systems, are used to detect the winding process, but there are some problems with existing image acquisition systems. It is difficult to meet the high-precision and multi-functional detection requirements required for industrial production for a long time. For example, after the machine is relocated, moved, cut and pulled, or the camera system is disassembled and the hardware is debugged, the image acquisition system needs to be analyzed to ensure that the image acquisition system is reliable.

[0123] The applicant found that the traditional reliability analysis of the image acquisition system currently requires repeated transcription of the image acquisition system data, which has the following problems:

[0124] 1. High repetitiveness, large amounts of copying and pasting data require manual and mechanical repetitive actions;

[0125] 2. The operation is cumbersome, and the winding machine needs to be started and stopped frequently by manual operation, which may easily lead to the scrapping of the battery cell due to misoperation;

[0126] 3. The operation is difficult. Using the calibration plate to calibrate the camera requires the operator to have certain experience.

[0127] This means that it takes at least 3 to 4 hours for the winder to complete a complete MSA evaluation, which results in low evaluation efficiency.

[0128] The embodiment of the present application provides an evaluation method, device and calibration board of a winding machine image acquisition system to solve the above technical problems. The calibration board provided by the embodiment of the present application is first introduced below.

[0129] like Figure 1a As shown, the embodiment of the present application provides a calibration plate 100, including:

[0130] Ontology 101;

[0131] At least one black rectangle 102 is disposed on the body 101 , and each black rectangle 102 has a corresponding standard width.

[0132] In this embodiment, the calibration plate 100 may include a main body 101 and black rectangles 102 , wherein the number of the black rectangles 102 may be one or more. Taking the number of the black rectangles 102 as an example, the multiple black rectangles 102 may be arranged at intervals on the main body 101 .

[0133] The side length of each black rectangle 102 extending along the first direction (X) may be a standard width. Each black rectangle 102 corresponds to a preset standard width, which may be set according to actual needs. For example, the standard width may be 0.5 mm, 1.0 mm, 2.0 mm, 2.5 mm, 3.0 mm, etc.

[0134] The calibration plate 100 can be placed within the field of view of the camera so that the camera can capture an image of the calibration plate, and the image acquisition system can perform edge capture processing on the black rectangle 102 in the image. According to the first frame capture processing generated by the edge capture processing, the target width of the black rectangle 102 is calculated, and the width data composed of the target width and the standard width of the black rectangle 102 can be used as calibration data of the image acquisition system for subsequent evaluation.

[0135] In this way, when the winding machine winds to a certain extent, the calibration plate can be placed in the field of view of the camera in the image acquisition system, and the image acquisition system can be controlled by the programmable logic controller to automatically perform edge processing on the black rectangle corresponding to the standard width in the calibration plate, so as to calculate the target width and obtain width data including the standard width and the target width. It is unnecessary to manually operate the winding machine frequently and repeatedly copy the data of the image acquisition system to obtain the calibrated width data in the evaluation, which simplifies the evaluation operation process and effectively improves the evaluation efficiency.

[0136] In some embodiments, at least two black rectangle groups are provided on the body, each black rectangle group includes a plurality of black rectangles 102 spaced apart along a first direction, the side length of the black rectangle 102 extending along the first direction (X) is a standard width, the side length of the black rectangle 102 extending along the second direction (Y) is a standard length, and the first direction (X) and the second direction (Y) are perpendicular to each other;

[0137] The standard widths corresponding to any two black rectangles 102 in each black rectangle group are different, and the standard lengths corresponding to any two black rectangles are the same.

[0138] In this embodiment, in order to ensure the comprehensiveness of the data, each calibration plate 100 may include at least two black rectangle groups, and each black rectangle group may include 3 to 7 black rectangles 102. The number of black rectangle groups and the number of black rectangles 102 in each black rectangle group may be set according to actual needs and are not specifically limited here. Figure 1a As shown, the calibration plate 100 may include two upper and lower black rectangle groups, wherein any one of the black rectangle groups may include five black rectangles 102 .

[0139] like Figure 1a As shown, the side length of the black rectangle 102 extending along the first direction (X) is the standard width, and the side length of the black rectangle 102 extending along the second direction (Y) is the standard length, and the first direction (X) and the second direction (Y) are perpendicular to each other. The standard widths of the black rectangles 102 in the same black rectangle group are different. For example, the standard widths of the five black rectangles 102 can be 0.5 mm, 1.0 mm, 2.0 mm, 2.5 mm, and 3.0 mm, respectively.

[0140] In some examples, at least two black rectangle groups can be symmetrically arranged in the main body 101, and the black rectangles 102 in each black rectangle group can be equidistantly arranged to facilitate faster and more accurate positioning of each black rectangle, thereby obtaining a more accurate first grasping frame.

[0141] In this way, by setting multiple black rectangles of different standard widths on the calibration board, the number of black rectangles will not be too small to affect the breadth of the data, nor will it be too large to increase the computing cost, so that the acquired width data is more reasonable.

[0142] In some embodiments, the calibration plate 100 further includes:

[0143] The positioning mark 103 is disposed on the main body 101 . There is a standard distance between the positioning mark 103 and each black rectangle 102 , and the standard distances between the positioning mark 103 and different black rectangles 102 are different.

[0144] like Figure 1a and Figure 1b As shown, the calibration plate 100 may further include a positioning mark 103 disposed on the body 101. The positioning mark 103 may be a color block of a different color, a positioning column, or a positioning hole, etc., which is not specifically limited here.

[0145] The relative position between the positioning mark 103 and each black rectangle 102 is pre-set, and there is a different standard distance between the positioning mark 103 and each black rectangle 102, so that after the position of the positioning mark 103 is identified, the position of each black rectangle 102 can be found based on the position of the positioning mark 103 and the corresponding standard distance.

[0146] In this way, the positioning mark can be used to assist in the positioning of the black rectangle, so as to ensure that a more accurate first grasping frame can be generated during subsequent use, thereby improving the accuracy of the evaluation.

[0147] In some embodiments, the positioning mark 103 includes at least one positioning hole. Figure 1a and Figure 1b As shown, the positioning mark 103 can be a positioning hole. In this way, the position of the black rectangle can be positioned through the positioning hole, which has a simple structure and is easy to operate.

[0148] In some embodiments, the positioning mark 103 includes a first positioning hole 1031 and a second positioning hole 1032 , the first positioning hole 1031 and the second positioning hole 1032 are symmetrically arranged on both sides of the body 101 , and at least one black rectangle 102 is arranged in the middle area of ​​the body.

[0149] like Figure 1a As shown, the positioning mark 103 may include a first positioning hole 1031 and a second positioning hole 1032. The first positioning hole 1031 and the second positioning hole 1032 may be disposed at both sides of the top of the body 101 and are relatively symmetrical. At least one black rectangle 102 is disposed in the middle area of ​​the body 101.

[0150] In some examples, the distance between the first positioning hole 1031 and the black rectangle 102 closest to it can be the first distance, the distance between the second positioning hole 1032 and the black rectangle 102 closest to it can also be the first distance, the spacing between the multiple black rectangles 102 in each black rectangle group is the second distance, and the spacing between two adjacent black rectangle groups is the third distance. The first distance, the second distance, and the third distance are all pre-set known values, so the position of any black rectangle 102 can be determined based on the first positioning hole 1031 or the second positioning hole 1032, and the positions of the black rectangles 102 can be mutually verified to ensure the accuracy of the position.

[0151] In this way, the number of the positioning holes is two, and they are respectively located on both sides of the black rectangle, which can further improve the positioning accuracy of the black rectangle.

[0152] In some embodiments, the positioning mark 103 includes a first positioning hole 1031 and a second positioning hole 1032 , the first positioning hole 1031 and the second positioning hole 1032 are respectively disposed at two diagonal corners of the body 101 , and at least one black rectangle 102 is disposed in the middle area of ​​the body.

[0153] like Figure 1b As shown, the first positioning hole 1031 and the second positioning hole 1032 can be respectively set at two diagonal positions of the body 101, for example, the first positioning hole 1031 is set at the upper left corner of the body 101, and the second positioning hole 1032 is set at the lower right corner of the body 101. The distance between the first positioning hole 1031 and the second positioning hole 1032 and each black rectangle 102 is also pre-set, so the position of any black rectangle 102 can be determined according to the first positioning hole 1031 or the second positioning hole 1032, and the position of the black rectangle 102 can be mutually verified to ensure the accuracy of the position.

[0154] In this way, the number of the positioning holes is two, and they are respectively located at two opposite corners of the black rectangle, which can further improve the positioning accuracy of the black rectangle.

[0155] like Figure 2 As shown, an embodiment of the present application provides an evaluation method for a winding machine image acquisition system, the image acquisition system includes at least one camera, the winding machine is used to wind a battery cell, the battery cell includes a pole piece, a diaphragm and a ceramic layer, and the method may include:

[0156] Step 201: When the winding machine winds the battery cell to a first preset number of layers and a preset calibration plate is placed within the field of view of the camera, and the calibration plate includes at least one black rectangle, and each black rectangle has a standard width, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on at least one black rectangle to generate a first edge grabbing frame.

[0157] It is understandable that if Figure 3 and Figure 4 As shown, in the process of winding the battery cell by the winding machine 300, the anode sheet 302, the separator 301, the cathode sheet 303 and the separator 301 are arranged in sequence and then wound. The cathode sheet 303 is also coated with a ceramic layer 304, and the material of the ceramic layer is not specifically limited here, for example, the ceramic layer can be AT11.

[0158] The camera 310 can be used to detect the winding status of the winding machine 300 in real time. Generally speaking, multiple cameras 310 can be set on one side of the winding machine to take pictures of the battery cells during the winding process, and then stitch together to obtain an image of the entire battery cell. For example, two cameras 310 can be used to take pictures of the inside and outside of the winding machine, respectively. Figure 4 As shown, one camera 310 captures image area C, and another camera 310 captures image area D.

[0159] like Figure 3 indivual Figure 4 As shown, the captured image may include a cathode detection area A and an anode detection area B. The cathode detection area A may include a diaphragm 301 , a ceramic layer 304 and a cathode sheet 303 , and the anode detection area B may include a diaphragm 301 and an anode sheet 302 .

[0160] In step 201, a programmable logic controller (PLC) can be linked with the image acquisition system. When it is necessary to obtain MSA evaluation related data, the image acquisition system and the PLC can start the MSA function. When the winding machine winds the battery cell to the first preset number of layers, the calibration plate mentioned above is placed in the field of view of each camera in the image acquisition system.

[0161] like Figure 5 As shown, one or two calibration plates 100 may be placed in the field of view of each camera 310 , so that the camera can capture the image of the calibration plate 100 .

[0162] like Figure 6 As shown, when it is determined that there is a calibration plate 100 in the field of view of the camera 310, the PLC can control the image acquisition system through the programmable logic controller to automatically locate the black rectangle 102 in the calibration plate 100, and perform edge capture processing to generate a first capture frame 600.

[0163] Step 202: Determine a target width corresponding to each black rectangle in at least one black rectangle according to the first grabbing frame.

[0164] In step 202, if Figure 6As shown, the number of first grabbing frames 600 is usually twice that of black rectangles 102, that is, each black rectangle 102 may correspond to two first grabbing frames 600. The target width of the black rectangle 102 may be calculated based on the coordinates of a target pixel point in the two corresponding first grabbing frames 600.

[0165] The target pixel point in the first grabbing frame 600 may be a pre-set pixel point, or may be a pixel point that meets the conditions and is determined after traversing all the pixels points, which is not specifically limited here.

[0166] It can be understood that each black rectangle corresponds to a standard width, and the target width and the standard width can be saved as width data for subsequent evaluation.

[0167] Step 203, when the winding machine winds the battery cell to the second preset number of layers, the programmable logic controller controls the camera to continuously capture N first images, and the image acquisition system performs edge grabbing processing on the electrode, diaphragm and ceramic layer in each first image to generate a second edge grabbing frame corresponding to the N first images, where N is an integer greater than 1.

[0168] In step 203, repeatability and reproducibility data may also be obtained for MSA evaluation. Figure 7 As shown, the PLC and the image acquisition system can be started in a repetitive measurement mode. In this mode, the battery cell can be wound to the second preset number of layers on the winding machine, and the PLC controls the camera to continuously take multiple first images. Then, the image acquisition system automatically performs edge grabbing processing on the pole piece, the diaphragm 301 and the ceramic layer 304 in each first image to generate a second grabbing frame 700. Among them, the pole piece can include an anode piece 302 and a cathode piece 303. The number of the second preset number of layers and the specific layer value can be pre-set according to actual needs, and are not specifically limited here.

[0169] It can be understood that the first preset number of layers and the second preset number of layers mentioned above can be the same number of layers or different numbers of layers, which is not specifically limited here.

[0170] Step 204 , evaluating the width data and the data corresponding to the second grab border, wherein the width data includes a standard width and a target width corresponding to each black rectangle.

[0171] In step 204, the image acquisition system can be evaluated based on the width data and the data corresponding to the second grabbing frame. The data corresponding to the second grabbing frame can be the coordinates of a target pixel point in the second grabbing frame. The target pixel point in the second grabbing frame can be a pre-set pixel point, or a pixel point that meets the conditions determined after traversing all the pixels, which is not specifically limited here.

[0172] For example, Figure 7 As shown, taking the horizontal direction as the X-axis as an example, the X-axis coordinates of all pixels in the second frame 700 can be derived to obtain the derivative value. After traversing all pixels, a pixel whose derivative value is greater than a preset threshold can be used as a target pixel.

[0173] In this way, when the winding machine winds to a certain extent, the preset calibration plate can be placed in the field of view of the camera in the image acquisition system, and the image acquisition system can be controlled by the programmable logic controller to automatically perform edge grabbing processing on the black rectangle corresponding to the standard width in the calibration plate, so as to calculate the target width and obtain width data including the standard width and the target width. The camera can be controlled by the programmable logic controller to automatically trigger multiple shots of the battery cell, and the image acquisition system can perform edge grabbing processing on the pole piece, diaphragm and ceramic layer in the first image taken, and obtain data corresponding to the second grabbing frame that meets repeatability and reproducibility. Therefore, there is no need to manually operate the winding machine frequently and repeatedly copy the data of the image acquisition system, and the calibrated width data and the data corresponding to the second grabbing frame that meets repeatability and reproducibility can be obtained, and the image acquisition system can be evaluated based on these data, which simplifies the evaluation operation process and effectively improves the evaluation efficiency.

[0174] In some embodiments, controlling the image acquisition system through a programmable logic controller to perform edge capture processing on at least one black rectangle to generate a first edge capture frame may include:

[0175] Controlling the camera to shoot based on the calibration plate through a programmable logic controller to obtain a second image;

[0176] The image acquisition system performs edge capture processing on at least one black rectangle in the second image to generate a first edge capture frame, wherein the frame of at least one black rectangle extending along the first direction is parallel to the frame of the second image extending along the first direction, and the frame of at least one black rectangle extending along the second direction is parallel to the frame of the second image extending along the second direction, and the first direction and the second direction are perpendicular to each other.

[0177] In this embodiment, if Figure 5 As shown, when the calibration plate 100 is placed, the calibration plate 100 is placed horizontally in the field of view of the camera. The PLC can control the camera to shoot based on the calibration plate 100 to obtain a second image. Since the calibration plate 100 is placed horizontally, the frame of at least one black rectangle in the calibration plate 100 extending along the first direction is parallel to the frame of the second image extending along the first direction, and the frame of at least one black rectangle extending along the second direction is parallel to the frame of the second image extending along the second direction.

[0178] like Figure 6As shown, the image acquisition system can automatically perform edge capture processing on at least one black rectangle 102 in the second image to generate a first edge capture frame 600 .

[0179] In this way, the calibration plate can be placed horizontally in the field of view of the camera, so that any border of the black rectangle is parallel to the border extending in the same direction in the second image taken by the camera, so as to generate a more accurate first capture border, thereby ensuring the accuracy of the target width and further improving the accuracy of the image acquisition system evaluation.

[0180] In some embodiments, determining, according to the first gripping frame, a target width corresponding to each black rectangle in the at least one black rectangle may include:

[0181] For each black rectangle, determine the pixel coordinates of two first grabbing frames corresponding to the black rectangle;

[0182] According to the pixel coordinates, determine the target width corresponding to the black rectangle.

[0183] In this embodiment, if Figure 6 As shown, each black rectangle 102 may correspond to two first grabbing frames 600. The pixel coordinates of the two first grabbing frames corresponding to the black rectangle may be determined first. Figure 6 As shown, taking the horizontal direction as the X-axis as an example, the X-axis coordinates of all the pixels in the first grabbing frame 600 can be derived to obtain the derivative value. After traversing all the pixels, the coordinates of the pixels whose derivative values ​​are greater than the preset threshold can be used as the pixel coordinates of the first grabbing frame 600.

[0184] The distance between the two pixel points may be calculated according to the pixel coordinates of the two first grabbing frames corresponding to the black rectangle, and the distance may be determined as the target width corresponding to the black rectangle.

[0185] In this way, the pixel coordinates of each first grabbing frame can be determined, so that the target width of the black rectangle can be calculated based on the two first grabbing frames corresponding to each black rectangle, so that the calibrated width data can be subsequently formed based on the target width and the standard width for evaluating the image acquisition system.

[0186] In some embodiments, a positioning mark is further provided on the calibration plate, and the positioning mark is used to indicate the position of at least one black rectangle;

[0187] Controlling the image acquisition system by a programmable logic controller to perform edge grabbing processing on at least one black rectangle to generate a first edge grabbing frame may include:

[0188] Controlling the image acquisition system through a programmable logic controller to identify the positioning mark, and determining the position of at least one black rectangle according to the identified positioning mark;

[0189] The image acquisition system performs edge capture processing on at least one black rectangle according to the position of at least one black rectangle to generate a first edge capture frame.

[0190] In this embodiment, as mentioned above, a positioning mark is also provided on the calibration plate, and the positioning mark can be used to indicate the position of at least one black rectangle. Therefore, the PLC can control the image acquisition system to identify the positioning mark in the second image, and according to the identified positioning mark, the position of each black rectangle in the second image can be located, and the corresponding two first capture traversals can be generated according to the position.

[0191] In this way, the position of the black rectangular frame can be determined according to the positioning mark on the calibration plate, so that the image acquisition system can generate a more accurate first capture frame according to the position, thereby ensuring the accuracy of the target width and further improving the accuracy of the image acquisition system evaluation.

[0192] In some embodiments, a standard distance corresponds to between the positioning mark and each black rectangle, and the standard distances between the positioning mark and different black rectangles are different;

[0193] Controlling the image acquisition system to identify the positioning mark through the programmable logic controller, and determining the position of at least one black rectangle according to the identified positioning mark, may include:

[0194] The image acquisition system is controlled by a programmable logic controller to identify the positioning mark to determine the position of the positioning mark;

[0195] The position of each black rectangle is determined according to the position of the positioning mark and the corresponding standard distance between the positioning mark and each black rectangle, and the position of at least one black rectangle is obtained.

[0196] In this embodiment, there are different standard distances between the positioning mark and each black rectangle, and the standard distances may include distances in the X-axis direction and distances in the Y-axis direction. The PLC may first control the image acquisition system to identify the positioning mark in the second image, and obtain the position of the positioning mark according to the identified positioning mark, for example, the horizontal coordinate and the vertical coordinate of the positioning mark may be obtained.

[0197] The position of the black rectangle can be calculated based on the position of the positioning mark and the standard distance. For example, the sum of the horizontal coordinate of the positioning mark and the distance in the X-axis direction can be determined as the horizontal coordinate of the black rectangle, and the sum of the vertical coordinate of the positioning mark and the distance in the Y-axis direction can be determined as the vertical coordinate of the black rectangle to obtain the position of the black rectangle.

[0198] In this way, the position of each black rectangle can be calculated based on the position of the positioning marker and the corresponding standard distance between the positioning marker and each black rectangle, so that the image acquisition system can generate a more accurate first capture frame based on the position, thereby ensuring the accuracy of the target width and further improving the accuracy of the image acquisition system evaluation.

[0199] In some embodiments, when the winding machine winds the battery cell to a first preset number of layers and a preset calibration plate is placed within the field of view of the camera, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on at least one black rectangle to generate a first edge grabbing frame, including:

[0200] When the winding machine winds the battery cell to a first preset number of layers and the calibration plate is placed at the center of the camera's field of view, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on at least one black rectangle to generate a first edge grabbing frame.

[0201] In this embodiment, the calibration plate can be placed at the center of the camera's field of view. In this way, by placing the calibration plate at the center of the camera's field of view, it can be ensured that the camera can capture an image containing the full view of the calibration plate, thereby further ensuring the accuracy of the first capture frame.

[0202] In some embodiments, when the winding machine winds the battery cell to a first preset number of layers and a preset calibration plate is placed within the field of view of the camera, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on at least one black rectangle to generate a first edge grabbing frame, including:

[0203] When the winding machine winds the battery cell to half of the total number of layers and the calibration plate is placed within the field of view of the camera, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on at least one black rectangle to generate a first edge grabbing frame.

[0204] In this embodiment, the first preset number of layers can be half of the total number of layers of the winding machine winding the battery cell. In this way, when the winding machine winds the battery cell to the middle number of layers, the winding state is usually relatively stable. At this time, obtaining the data required for evaluation can reduce the influence of other factors on the data, thereby ensuring that the data can more accurately reflect the actual situation of the image acquisition system and improve the accuracy of the evaluation.

[0205] In some embodiments, evaluating the width data and the data corresponding to the second gripping frame may include:

[0206] The width data and the data corresponding to the second grab frame are saved as target data in a preset format;

[0207] The target data is input into the Measurement Systems Analysis (MSA) system to obtain the evaluation results of the image acquisition system.

[0208] In this embodiment, the acquired width data and the data corresponding to the second grabbing frame can be saved as target data in the format required by the MSA system, and then the target data can be directly input into the MSA system to evaluate the image acquisition system and obtain the evaluation results. This reduces the risk of inaccurate evaluation results or failure to obtain evaluation results due to format errors. It also saves time for re-changing the format during the evaluation process.

[0209] It is understandable that the target data in a preset format may be saved to a preset storage address, and when the MSA system is evaluating, the MSA system may automatically call the target data from the preset storage address to input the target data into the MSA system. Alternatively, the user may manually upload the saved target data to the MSA system to input the target data into the MSA system. The specific input method of the target data is not specifically limited herein.

[0210] In this way, the data can be directly saved as target data in a preset format, so that the image acquisition system can be directly input into the MSA system based on the target data in the preset format to evaluate the image acquisition system, further improving the convenience and efficiency of the evaluation.

[0211] In some embodiments, saving the width data and the data corresponding to the second frame as target data in a preset format may include:

[0212] Obtaining a table template of a preset format, the table template comprising a plurality of cells, each cell being associated with a first identifier;

[0213] Read the first identifier associated with each cell in the table template, and the second identifier associated with each data in the width data and the data corresponding to the second frame;

[0214] According to the correspondence between the first identifier associated with each cell and the second identifier associated with each data, the width data and the data corresponding to the second grab frame are filled into the table template to obtain the target data and save it.

[0215] In this embodiment, a table template of a preset format may be obtained, the table template including a plurality of cells, each cell being associated with a first identifier. By way of example, the table template of the preset format may include a plurality of columns and a plurality of columns, each row may correspond to a row name, and each column may correspond to a column name. For example, if the row name of the first row is "the first black rectangle of the calibration plate", and the column name of the first column is "target width", then the first identifier of the cell located in the first row and the first column may be "the target width of the first black rectangle of the calibration plate".

[0216] It can be understood that when the width data and the data corresponding to the second grab frame are obtained, the corresponding second identifier can also be recorded. For example, when the specific value of the target width of the first black rectangle of the calibration plate is obtained, the associated second identifier, that is, "the target width of the first black rectangle of the calibration plate" can be recorded synchronously.

[0217] The first identifier associated with each cell in the table template, as well as the second identifier associated with each data in the width data and the data corresponding to the second grab frame can be read, and the width data and the data corresponding to the second grab frame can be filled into the table template according to the corresponding relationship between the first identifier associated with each cell and the second identifier associated with each data. For example, the specific value of the target width of the first black rectangle of the calibration plate can be filled into the cell located in the first row and the first column.

[0218] By traversing each data in the width data and the data corresponding to the second grab frame, and filling them all into the table template, the target data can be obtained and saved.

[0219] In this way, the width data and the data corresponding to the second grab frame can be filled in a table template of a preset format to obtain target data that meets the requirements of the preset format, so that the image acquisition system can be evaluated directly based on the target data input into the measurement system analysis system, further improving the convenience and efficiency of the evaluation.

[0220] In some embodiments, the number of the second preset layers is M, where M is an integer greater than 1;

[0221] When the winding machine winds the battery cell to the second preset number of layers, the programmable logic controller controls the camera to continuously shoot N first images, and the image acquisition system performs edge grabbing processing on the pole piece, the diaphragm and the ceramic layer in each first image to generate a second edge grabbing frame corresponding to the N first images, which may include:

[0222] When the winding machine winds the battery cell to any second preset number of layers among the M second preset numbers of layers, the programmable logic controller controls the camera to continuously capture N first images, and the image acquisition system performs edge grabbing processing on the pole piece, diaphragm and ceramic layer in each first image to generate M groups of second grabbing frames corresponding to the N first images.

[0223] In this embodiment, the second preset number of layers can be multiple, that is, the edge grabbing process of the electrode sheet, the diaphragm and the ceramic layer in the battery cell can be repeated for multiple groups. Among them, the number of the second preset number of layers and the number of first images obtained by continuous shooting can be set according to actual needs and are not specifically limited here.

[0224] For example, the second preset number of layers is 10, and the camera continuously takes 3 first images. The winding machine starts to wind the battery cell. When the battery cell is wound to the second preset number of layers 1, the PLC can control the camera to continuously take 3 first images. The image acquisition system performs edge grabbing processing on the pole piece, diaphragm and ceramic layer in each first image to generate a second edge grabbing frame. Figure 7 As shown, each first image can generate 9 second grasping frames 700 , and 3 first images can generate 27 second grasping frames 700 .

[0225] The winding machine continues to wind the battery cell. When the battery cell is wound to the second preset layer number 2, the PLC can control the camera to continuously take 3 first images. The image acquisition system performs edge grabbing processing on the pole piece, diaphragm and ceramic layer in each first image to generate a second edge grabbing frame. Figure 7 As shown, for the three first images, 27 second gripping frames 700 can be generated... until the battery cell is wound to the second preset number of layers 10, the PLC can also control the camera to continuously shoot three first images, and the image acquisition system performs edge gripping on the pole piece, diaphragm and ceramic layer in each first image to generate a second gripping frame. Figure 7 As shown, for the three first images, 27 second grabbing frames 700 can be generated. At this point, it can be considered that the repeatability measurement has been completed.

[0226] Through the above operation, a total of 10 groups of second grabbing frames corresponding to the three first images, that is, 270 second grabbing frames, can be generated, and the data corresponding to the 270 second grabbing frames can be saved.

[0227] In this way, when the winding machine winds the battery cell to a pre-set multiple second preset number of layers, the camera can be controlled by the programmable logic controller to automatically shoot continuously, so that the second grasping frame corresponding to the multiple first images obtained by multiple groups of continuous shooting can be obtained, so that the data corresponding to the final second grasping frame can better meet the requirements of repeatability and reproducibility, laying the foundation for evaluation.

[0228] Based on the evaluation method of the winding machine image acquisition system provided in the above embodiment, taking the image acquisition system as a CCD measurement system as an example, the present application also provides a specific scenario embodiment, which can be used to obtain width data, and the scenario embodiment includes:

[0229] Step 801, the CCD measurement system and PLC start the MSA function;

[0230] Step 802, the PLC controls the winding machine to wind the battery cell to half of the total number of layers;

[0231] Step 803, open the winder and place the calibration plate in the center of the field of view of the CCD camera;

[0232] Step 804, the CCD measurement system determines that the calibration plate has been placed, automatically locates a plurality of black rectangles in the calibration plate, and generates a first grabbing frame;

[0233] Step 805: Calculate the target width of each black rectangle according to the first grab border, and compare it with the standard width of each black rectangle to obtain the width data.

[0234] Step 806, determine whether the acquisition of all CCD cameras is completed, if so, end, if not, return to step 803.

[0235] Based on the evaluation method of the winding machine image acquisition system provided in the above embodiment, taking the image acquisition system as a CCD measurement system as an example, the present application also provides another specific scenario embodiment, which can be used to obtain repeatability and reproducibility data, that is, data corresponding to the second grasping frame, and the scenario embodiment includes:

[0236] Step 901, the CCD measurement system and PLC start a repetitive measurement mode;

[0237] Step 902, the PLC controls the winding machine to wind the battery cell to any second preset number of layers;

[0238] Step 903, the PCT triggers the CCD camera to take multiple shots of the battery cell to obtain multiple first images;

[0239] Step 904, for each first image, the CCD measurement system automatically grabs the pole piece, the diaphragm and the ceramic layer to generate a second grabbing frame;

[0240] Step 905, determine whether the repeatability measurement is completed, if so, execute step 906, if not, return to step 902.

[0241] Step 906, save the data corresponding to the second grab border.

[0242] Based on the evaluation method of the winding machine image acquisition system provided in the above embodiment, the present application also provides an embodiment of an evaluation device of the winding machine image acquisition system.

[0243] Fig.10A schematic structural diagram of an evaluation device for a winding machine image acquisition system provided in another embodiment of the present application is shown. For ease of explanation, only the portion related to the embodiment of the present application is shown.

[0244] like Fig.10 As shown, the image acquisition system includes at least one camera, the winding machine is used to wind the battery cell, the battery cell includes a pole piece, a diaphragm and a ceramic layer, and the evaluation device 1000 of the winding machine image acquisition system may include:

[0245] The first generating module 1001 is used to control the image acquisition system through a programmable logic controller to perform edge grabbing processing on at least one black rectangle to generate a first grabbing frame when the winding machine winds the battery cell to a first preset number of layers and a preset calibration plate is placed within the field of view of the camera, the calibration plate includes at least one black rectangle, and each black rectangle corresponds to a standard width;

[0246] A determination module 1002, configured to determine a target width corresponding to each black rectangle in at least one black rectangle according to the first grasping frame;

[0247] The second generation module 1003 is used to control the camera to continuously take N first images through the programmable logic controller when the winding machine winds the battery cell to the second preset number of layers, and the image acquisition system performs edge grabbing processing on the pole piece, the diaphragm and the ceramic layer in each first image to generate a second grabbing frame corresponding to the N first images, where N is an integer greater than 1;

[0248] The evaluation module 1004 is used to evaluate the width data and the data corresponding to the second grab border, wherein the width data includes a standard width and a target width corresponding to each black rectangle.

[0249] In this way, when the winding machine winds to a certain extent, the preset calibration plate can be placed in the field of view of the camera in the image acquisition system, and the image acquisition system can be controlled by the programmable logic controller to automatically perform edge grabbing processing on the black rectangle corresponding to the standard width in the calibration plate, so as to calculate the target width and obtain width data including the standard width and the target width. The camera can be controlled by the programmable logic controller to automatically trigger multiple shots of the battery cell, and the image acquisition system can perform edge grabbing processing on the pole piece, diaphragm and ceramic layer in the first image taken, and obtain data corresponding to the second grabbing frame that meets repeatability and reproducibility. Therefore, there is no need to manually operate the winding machine frequently and repeatedly copy the data of the image acquisition system, and the calibrated width data and the data corresponding to the second grabbing frame that meets repeatability and reproducibility can be obtained, and the image acquisition system can be evaluated based on these data, which simplifies the evaluation operation process and effectively improves the evaluation efficiency.

[0250] In some embodiments, the first generating module 1001 is further used to:

[0251] Controlling the camera to shoot based on the calibration plate through a programmable logic controller to obtain a second image;

[0252] The image acquisition system performs edge capture processing on at least one black rectangle in the second image to generate a first edge capture frame, wherein the frame of at least one black rectangle extending along the first direction is parallel to the frame of the second image extending along the first direction, and the frame of at least one black rectangle extending along the second direction is parallel to the frame of the second image extending along the second direction, and the first direction and the second direction are perpendicular to each other.

[0253] In this way, the calibration plate can be placed horizontally in the field of view of the camera, so that any border of the black rectangle is parallel to the border extending in the same direction in the second image taken by the camera, so as to generate a more accurate first capture border, thereby ensuring the accuracy of the target width and further improving the accuracy of the image acquisition system evaluation.

[0254] In some embodiments, the determination module 1002 is further configured to:

[0255] For each black rectangle, determine the pixel coordinates of two first grabbing frames corresponding to the black rectangle;

[0256] According to the pixel coordinates, determine the target width corresponding to the black rectangle.

[0257] In this way, the pixel coordinates of each first grabbing frame can be determined, so that the target width of the black rectangle can be calculated based on the two first grabbing frames corresponding to each black rectangle, so that the calibrated width data can be subsequently formed based on the target width and the standard width for evaluating the image acquisition system.

[0258] In some embodiments, a positioning mark is further provided on the calibration plate, and the positioning mark is used to indicate the position of at least one black rectangle;

[0259] The first generation module 1001 further includes:

[0260] A determination unit, used to control the image acquisition system to identify the positioning mark through a programmable logic controller, and determine the position of at least one black rectangle according to the identified positioning mark;

[0261] The generating unit is used for the image acquisition system to perform edge grabbing processing on at least one black rectangle according to the position of at least one black rectangle to generate a first edge grabbing frame.

[0262] In this way, the position of the black rectangular frame can be determined according to the positioning mark on the calibration plate, so that the image acquisition system can generate a more accurate first capture frame according to the position, thereby ensuring the accuracy of the target width and further improving the accuracy of the image acquisition system evaluation.

[0263] In some embodiments, a standard distance corresponds to between the positioning mark and each black rectangle, and the standard distances between the positioning mark and different black rectangles are different;

[0264] The determination unit is also used to:

[0265] The image acquisition system is controlled by a programmable logic controller to identify the positioning mark to determine the position of the positioning mark;

[0266] The position of each black rectangle is determined according to the position of the positioning mark and the corresponding standard distance between the positioning mark and each black rectangle, and the position of at least one black rectangle is obtained.

[0267] In this way, the position of each black rectangle can be calculated based on the position of the positioning marker and the corresponding standard distance between the positioning marker and each black rectangle, so that the image acquisition system can generate a more accurate first capture frame based on the position, thereby ensuring the accuracy of the target width and further improving the accuracy of the image acquisition system evaluation.

[0268] In some embodiments, the first generating module 1001 is further used to:

[0269] When the winding machine winds the battery cell to a first preset number of layers and the calibration plate is placed at the center of the camera's field of view, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on at least one black rectangle to generate a first edge grabbing frame.

[0270] In this way, by placing the calibration plate at the center of the camera's field of view, it can be ensured that the camera can capture an image containing the entirety of the calibration plate, thereby further ensuring the accuracy of the first capture frame.

[0271] In some embodiments, the first generating module 1001 is further used to:

[0272] When the winding machine winds the battery cell to half of the total number of layers and the calibration plate is placed within the field of view of the camera, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on at least one black rectangle to generate a first edge grabbing frame.

[0273] In this way, when the winding machine winds the battery cell to the middle layer, the winding state is usually relatively stable. Obtaining the data required for evaluation at this time can reduce the impact of other factors on the data, thereby ensuring that the data can more accurately reflect the actual situation of the image acquisition system and improve the accuracy of the evaluation.

[0274] In some embodiments, the evaluation module 1004 further includes:

[0275] A saving unit, used for saving the width data and the data corresponding to the second grabbing frame as target data in a preset format;

[0276] The evaluation unit is used to input the target data into the measurement system analysis system to obtain the evaluation results of the image acquisition system.

[0277] In this way, the data can be directly saved as target data in a preset format, so that the image acquisition system can be directly input into the measurement system analysis system based on the target data in the preset format to evaluate the image acquisition system, further improving the convenience and efficiency of the evaluation.

[0278] In some embodiments, the storage unit is further configured to:

[0279] Obtaining a table template of a preset format, the table template comprising a plurality of cells, each cell being associated with a first identifier;

[0280] Read the first identifier associated with each cell in the table template, and the second identifier associated with each data in the width data and the data corresponding to the second frame;

[0281] According to the correspondence between the first identifier associated with each cell and the second identifier associated with each data, the width data and the data corresponding to the second grab frame are filled into the table template to obtain the target data and save it.

[0282] In this way, the width data and the data corresponding to the second grab frame can be filled in a table template of a preset format to obtain target data that meets the requirements of the preset format, so that the image acquisition system can be evaluated directly based on the target data input into the measurement system analysis system, further improving the convenience and efficiency of the evaluation.

[0283] In some embodiments, the number of the second preset layers is M, where M is an integer greater than 1;

[0284] The second generating module 1003 is further used for:

[0285] When the winding machine winds the battery cell to any second preset number of layers among the M second preset numbers of layers, the programmable logic controller controls the camera to continuously capture N first images, and the image acquisition system performs edge grabbing processing on the pole piece, diaphragm and ceramic layer in each first image to generate M groups of second grabbing frames corresponding to the N first images.

[0286] In this way, when the winding machine winds the battery cell to a plurality of pre-set second preset layers, the camera can be controlled by the programmable logic controller to automatically take pictures continuously, so that the second grabbing frame corresponding to the plurality of first images obtained by the plurality of groups of continuous shooting can be obtained, so that the data corresponding to the final second grabbing frame can better meet the requirements of repeatability and reproducibility, laying the foundation for MSA evaluation.

[0287] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application, and are devices corresponding to the evaluation method of the above-mentioned winding machine image acquisition system. All implementation methods in the above-mentioned method embodiment are applicable to the embodiment of the device. Its specific functions and technical effects can be found in the method embodiment part, which will not be repeated here.

[0288] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0289] Fig.11 A schematic diagram of the hardware structure of an electronic device provided in yet another embodiment of the present application is shown.

[0290] The electronic device 1100 may include a processor 1101 and a memory 1102 storing programs or instructions. When the processor 1101 executes the program, the steps in any of the above method embodiments are implemented.

[0291] Exemplarily, the program may be divided into one or more modules / units, one or more modules / units are stored in the memory 1102, and executed by the processor 1101 to complete the present application. One or more modules / units may be a series of program instruction segments capable of completing a specific function, and the instruction segments are used to describe the execution process of the program in the device.

[0292] Specifically, the processor 1101 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0293] The memory 1102 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 1102 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In appropriate cases, the memory 1102 may include a removable or non-removable (or fixed) medium. In appropriate cases, the memory 1102 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 1102 is a non-volatile solid-state memory.

[0294] The memory may include read-only memory (ROM), random access memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical or other physical / tangible memory storage devices. Thus, typically, the memory includes one or more tangible (non-transitory) readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to an aspect of the present disclosure.

[0295] The processor 1101 implements any one of the methods in the above embodiments by reading and executing the program or instruction stored in the memory 1102 .

[0296] In one example, the electronic device may further include a communication interface 1103 and a bus 1104. The processor 1101, the memory 1102, and the communication interface 1103 are connected via the bus 1104 and communicate with each other.

[0297] The communication interface 1103 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0298] Bus 1104 includes hardware, software or both, and couples the components of online data traffic billing equipment to each other. For example, but not limitation, the bus may include accelerated graphics port (AGP) or other graphics bus, enhanced industrial standard architecture (EISA) bus, front-side bus (FSB), hypertransport (HT) interconnection, industrial standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnect (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. Where appropriate, bus 1104 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the present application considers any suitable bus or interconnection.

[0299] In addition, in combination with the method in the above embodiment, the embodiment of the present application may provide a machine-readable storage medium for implementation. The machine-readable storage medium stores a program or instruction; when the program or instruction is executed by a processor, any one of the methods in the above embodiment is implemented. The machine-readable storage medium can be read by a machine such as a computer.

[0300] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0301] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0302] An embodiment of the present application provides a computer program product, which is stored in a machine-readable storage medium. The program product is executed by at least one processor to implement the various processes of the above-mentioned method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0303] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0304] The functional modules shown in the above block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer grid such as the Internet, an intranet, etc.

[0305] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0306] Aspects of the present disclosure are described above with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and program products according to the embodiments of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by a computer program or instruction. These programs or instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the functions / actions specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs the specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0307] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for evaluating a winding machine image acquisition system, characterized in that: The image acquisition system includes at least one camera, the winding machine is used to wind the battery cell, the battery cell includes a pole piece, a diaphragm and a ceramic layer, and the method includes: When the winding machine winds the battery cell to a first preset number of layers, and a preset calibration plate is placed within the field of view of the camera, and the calibration plate includes at least one black rectangle, and each black rectangle has a corresponding standard width, the image acquisition system is controlled by a programmable logic controller to perform edge grabbing processing on the at least one black rectangle to generate a first edge grabbing frame; Determine, according to the first gripping frame, a target width corresponding to each black rectangle in the at least one black rectangle; When the winding machine winds the battery cell to any second preset number of layers among M second preset numbers of layers, the programmable logic controller controls the camera to continuously capture N first images, and the image acquisition system performs edge grabbing processing on the pole piece, the diaphragm and the ceramic layer in each first image to generate M groups of second edge grabbing frames corresponding to the N first images, where N and M are integers greater than 1; The width data and data corresponding to the second gripping frame are evaluated, wherein the width data includes a standard width and a target width corresponding to each black rectangle.

2. The method according to claim 1, characterized in that The step of controlling the image acquisition system to perform edge grabbing processing on the at least one black rectangle by a programmable logic controller to generate a first edge grabbing frame includes: Controlling the camera to shoot based on the calibration plate through a programmable logic controller to obtain a second image; The image acquisition system performs edge capture processing on the at least one black rectangle in the second image to generate a first edge capture frame, wherein the frame of the at least one black rectangle extending along the first direction is parallel to the frame of the second image extending along the first direction, and the frame of the at least one black rectangle extending along the second direction is parallel to the frame of the second image extending along the second direction, and the first direction and the second direction are perpendicular to each other.

3. The method according to claim 1, characterized in that The step of determining, according to the first grasping frame, a target width corresponding to each black rectangle in the at least one black rectangle comprises: For each black rectangle, determine the pixel coordinates of two first grabbing frames corresponding to the black rectangle; According to the pixel coordinates, a target width corresponding to the black rectangle is determined.

4. The method according to claim 1, characterized in that: The calibration plate is also provided with a positioning mark, and the positioning mark is used to indicate the position of the at least one black rectangle; The step of controlling the image acquisition system to perform edge grabbing processing on the at least one black rectangle by a programmable logic controller to generate a first edge grabbing frame includes: Controlling the image acquisition system to identify the positioning mark through a programmable logic controller, and determining the position of the at least one black rectangle according to the identified positioning mark; The image acquisition system performs edge capture processing on the at least one black rectangle according to the position of the at least one black rectangle to generate a first edge capture frame.

5. The method according to claim 4, characterized in that There is a standard distance between the positioning mark and each black rectangle, and the standard distances between the positioning mark and different black rectangles are different; Controlling the image acquisition system to identify the positioning mark through a programmable logic controller, and determining the position of the at least one black rectangle according to the identified positioning mark, including: Controlling the image acquisition system to identify the positioning mark through a programmable logic controller to determine the position of the positioning mark; According to the position of the positioning mark and the corresponding standard distance between the positioning mark and each black rectangle, the position of each black rectangle is determined to obtain the position of the at least one black rectangle.

6. The method according to any one of claims 1 to 5, characterized in that When the winding machine winds the battery cell to a first preset number of layers and a preset calibration plate is placed within the field of view of the camera, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on the at least one black rectangle to generate a first edge grabbing frame, including: When the winding machine winds the battery cell to a first preset number of layers and the calibration plate is placed at the center of the camera's field of view, the image acquisition system is controlled by a programmable logic controller to perform edge grabbing processing on the at least one black rectangle to generate a first edge grabbing frame.

7. The method according to any one of claims 1 to 5, characterized in that When the winding machine winds the battery cell to a first preset number of layers and a preset calibration plate is placed within the field of view of the camera, the programmable logic controller controls the image acquisition system to perform edge grabbing processing on the at least one black rectangle to generate a first edge grabbing frame, including: When the winding machine winds the battery cell to half of the total number of layers and the calibration plate is placed within the field of view of the camera, the image acquisition system is controlled by a programmable logic controller to perform edge grabbing processing on the at least one black rectangle to generate a first edge grabbing frame.

8. The method according to claim 1, characterized in that The evaluating the width data and the data corresponding to the second frame includes: Saving the width data and the data corresponding to the second grab frame as target data in a preset format; The target data is input into the measurement system analysis system to obtain the evaluation results of the image acquisition system.

9. The method according to claim 8, characterized in that The step of saving the width data and the data corresponding to the second frame as target data in a preset format includes: Obtaining a table template in a preset format, wherein the table template includes a plurality of cells, each cell being associated with a first identifier; Reading a first identifier associated with each cell in the table template, and a second identifier associated with each data in the width data and the data corresponding to the second scratch frame; According to the correspondence between the first identifier associated with each cell and the second identifier associated with each data, the width data and the data corresponding to the second grab border are filled into the table template to obtain and save the target data.

10. An evaluation system for a winding machine image acquisition system, characterized in that: The image acquisition system includes at least one camera, the winding machine is used to wind the battery cell, the battery cell includes a pole piece, a diaphragm and a ceramic layer, and the system includes: A first generating module is used for controlling the image acquisition system to perform edge grabbing processing on the at least one black rectangle through a programmable logic controller to generate a first grabbing frame when the winding machine winds the battery cell to a first preset number of layers and a preset calibration plate is placed within the field of view of the camera, the calibration plate includes at least one black rectangle, and each black rectangle corresponds to a standard width; a determination module, configured to determine a target width corresponding to each black rectangle in the at least one black rectangle according to the first grasping frame; A second generating module is used for controlling the camera to continuously take N first images through the programmable logic controller when the winding machine winds the battery cell to any second preset number of layers among M second preset numbers of layers, and the image acquisition system performs edge grabbing processing on the pole piece, the diaphragm and the ceramic layer in each first image to generate M groups of second grabbing frames corresponding to the N first images, where N and M are integers greater than 1; An evaluation module is used to evaluate the width data and data corresponding to the second grab border, wherein the width data includes a standard width and a target width corresponding to each black rectangle.

11. A calibration plate, applied to the evaluation method of the winding machine image acquisition system according to any one of claims 1 to 9, characterized in that: include: ontology; At least one black rectangle is disposed on the body, and each black rectangle has a corresponding standard width; At least two black rectangle groups are arranged on the body, each black rectangle group includes a plurality of black rectangles spaced apart along a first direction, the side length of the black rectangle extending along the first direction is a standard width, the side length of the black rectangle extending along the second direction is a standard length, and the first direction is perpendicular to the second direction; Among them, the standard widths corresponding to any two black rectangles in each black rectangle group are different, and the standard lengths corresponding to any two black rectangles are the same; The calibration plate also includes: A positioning mark is arranged on the main body, wherein a standard distance corresponds to each black rectangle, and the standard distances corresponding to different black rectangles are different. The positioning mark includes a first positioning hole and a second positioning hole, the first positioning hole and the second positioning hole are symmetrically arranged on both sides of the body, or the first positioning hole and the second positioning hole are respectively arranged at two opposite corners of the body; the at least one black rectangle is arranged in the middle area of ​​the body.

Images