Pole piece appearance detection system calibration method and device, computer equipment and medium

Abstract

The application discloses a kind of polar piece appearance detection system's calibration method, device, computer equipment and medium.The method comprises: according to the first target area of target chart that polar piece appearance detection system's shooting device is carried out static shooting to obtain multiple first target charts, determine definition detection result;According to the second target area of target chart that the shooting device is carried out static shooting to obtain multiple second target charts, determine transverse resolution detection result;According to the target chart that the shooting device is carried out shooting to obtain multiple third target charts, determine longitudinal resolution detection result and detection capability evaluation result;According to definition detection result, transverse resolution detection result, longitudinal resolution detection result and detection capability evaluation result, polar piece appearance detection system is calibrated.The technical scheme of the present application guarantees the consistency of detection capability of the same polar piece appearance detection system in use period and different polar piece appearance detection systems.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery pole piece, and particularly relates to a calibration method and device of a pole piece appearance detection system, computer equipment and a medium. BACKGROUND

[0002] The lithium battery pole piece industry has high requirements on the size precision of the coating process and the die cutting process of the pole piece. Meanwhile, defects such as cracks, pits and indentation in the coating area will affect the capacity of the lithium battery, and bring safety hazards such as electric leakage and easy explosion. Therefore, appearance defect detection needs to be performed on the pole piece to avoid substandard products with poor appearance from flowing into the lamination process, and causing safety hazards of the lithium battery.

[0003] In order to ensure the accuracy of the appearance detection system, the appearance detection system needs to be calibrated regularly. The calibration process is as follows: a target is pasted on the roller to cover the full field of view of the shooting device in the appearance detection system, Figure 1a A schematic diagram of a target for calibrating the appearance detection system in the prior art is provided, as shown in Figure 1a A black and white line pair is commonly used for the target in the prior art. Static target pictures are continuously collected, and the depth information of the black and white areas in the static target pictures is used for measurement calibration of the appearance detection system. The calibration method of the pole piece appearance detection system in the prior art cannot avoid the risk of functional reduction or even failure of the pole piece appearance detection system during the use cycle, and cannot guarantee the consistency of the appearance detection capability between multiple pole piece appearance detection systems. SUMMARY

[0004] The present application provides a calibration method and device of a pole piece appearance detection system, computer equipment and a medium, so as to realize quantitative evaluation of the detection capability of the pole piece appearance detection system, and guarantee the consistency of the detection capability of the same pole piece appearance detection system during the use cycle and between different pole piece appearance detection systems.

[0005] In a first aspect, an embodiment of the present application provides a calibration method of a pole piece appearance detection system, which comprises the following steps:

[0006] A plurality of first target pictures obtained by performing static shooting on a first target area of a target picture by a shooting device of the pole piece appearance detection system are used to determine a definition detection result of the pole piece appearance detection system.

[0007] A plurality of second target pictures obtained by performing static shooting on a second target area of the target picture by the shooting device are used to determine a transverse resolution detection result of the pole piece appearance detection system.

[0008] A plurality of third target pictures obtained by performing shooting on a uniformly rotating target picture by the shooting device are used to determine a longitudinal resolution detection result and a detection capability evaluation result of the pole piece appearance detection system.

[0009] According to the definition detection result, the lateral resolution detection result, the longitudinal resolution detection result and the detection capability evaluation result, the pole piece appearance detection system is calibrated.

[0010] In a second aspect, the embodiment of the present application further provides a calibration device of a pole piece appearance detection system, which comprises:

[0011] A definition detection result determination module is configured to determine the definition detection result of the pole piece appearance detection system according to a plurality of first target images obtained by the shooting device of the pole piece appearance detection system in static shooting on a first target area of a target image.

[0012] A lateral resolution detection result determination module is configured to determine the lateral resolution detection result of the pole piece appearance detection system according to a plurality of second target images obtained by the shooting device in static shooting on a second target area of a target image.

[0013] A longitudinal resolution detection result determination module is configured to determine the longitudinal resolution detection result and the detection capability evaluation result of the pole piece appearance detection system according to a plurality of third target images obtained by the shooting device in shooting on a target image rotating at a constant speed.

[0014] A pole piece appearance detection system calibration module is configured to calibrate the pole piece appearance detection system according to the definition detection result, the lateral resolution detection result, the longitudinal resolution detection result and the detection capability evaluation result.

[0015] In a third aspect, the embodiment of the present application further provides a computer device, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor executes the program to realize the calibration method of the pole piece appearance detection system according to any of the embodiments of the present application.

[0016] In a fourth aspect, the embodiment of the present application further provides a storage medium storing computer executable instructions, and the computer executable instructions are used to execute the calibration method of the pole piece appearance detection system according to any of the embodiments of the present application when executed by a computer processor.

[0017] The technical scheme of the embodiment of the present application determines the definition detection result according to the plurality of first target pictures obtained by the shooting device of the pole piece appearance detection system to statically shoot the first target area of the target picture, determines the horizontal resolution detection result according to the plurality of second target pictures obtained by statically shooting the second target area of the target picture, determines the longitudinal resolution detection result and the detection capability evaluation result according to the plurality of third target pictures obtained by shooting the target picture rotating at a constant speed, and calibrates the pole piece appearance detection system according to the definition detection result, the horizontal resolution detection result, the longitudinal resolution detection result and the detection capability evaluation result. The embodiment of the present application quantitatively evaluates the detection capability of the pole piece appearance detection system, and ensures the consistency of the detection capability of the same pole piece appearance detection system in the use period and the detection capability of different pole piece appearance detection systems.

[0018] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1a is a schematic diagram of a calibration target of an appearance detection system in the prior art of the present application;

[0021] Figure 1b is a flowchart of a calibration method of a pole piece appearance detection system provided by an embodiment of the present application;

[0022] Figure 2a is a flowchart of a calibration method of a pole piece appearance detection system provided by an embodiment of the present application;

[0023] Figure 2b is a schematic diagram of a target picture provided by an embodiment of the present application;

[0024] Figure 3 is a structural schematic diagram of a calibration device of a pole piece appearance detection system provided by an embodiment of the present application;

[0025] Figure 4 is a structural schematic diagram of a computer device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0026] In the following, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of embodiments of the present application, rather than all embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort should fall within the protection scope of the present application.

[0027] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units need not be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0028] Embodiment one

[0029] FIG. 1 is a flowchart of a calibration method of an electrode sheet appearance detection system provided by embodiment one of the present application. The present embodiment can be applied to the case of periodically calibrating the electrode sheet appearance detection system. The method can be executed by a calibration device of the electrode sheet appearance detection system. The calibration device of the electrode sheet appearance detection system can be realized in the form of hardware and / or software. The calibration device of the electrode sheet appearance detection system can be configured in a computer device and used in cooperation with the electrode sheet appearance detection system.

[0030] As shown in FIG. 1, the method comprises:

[0031] S110, determining the definition detection result of the electrode sheet appearance detection system according to a plurality of first target pictures obtained by static shooting of a first target area of a target picture by a shooting device of the electrode sheet appearance detection system.

[0032] The electrode sheet appearance detection system can include a shooting device and a light source. The shooting device can be an industrial camera, etc. The light source is used for lighting when the shooting device shoots an image.

[0033] The target picture is pre-pasted on an electrode sheet feeding roller. The target picture can include a plurality of areas, such as a first target area, a second target area, a third target area, etc. Different target areas are selected under the condition that the electrode sheet feeding roller is static or uniformly rotating according to the content of calibration and verification.

[0034] The first target region is a region in the target image used for sharpness calibration. The polar sheet feeding roller is rotated so that the first target region is located in the imaging range of the shooting device of the polar sheet appearance detection system. The first target region is kept stationary, and the shooting device takes pictures of the first target region to obtain multiple first target images. The first target images are sent to the calibration device of the polar sheet appearance detection system. Preferably, the shooting device can continuously capture more than ten first target images to reduce the impact of the shooting device focus on the image sharpness.

[0035] In the embodiment of the present application, the sharpness detection result can be determined by comparing the sharpness of the first target region in each first target image with the standard sharpness value. If the difference between the sharpness of the first target region and the standard sharpness value is less than the preset sharpness difference, the sharpness of the first target image meets the requirements. If the sharpness of each first target image meets the requirements, or the ratio between the number of first target images with sharpness meeting the requirements and the total number of first target images is greater than a preset value, it is determined that the sharpness detection result is qualified. However, the embodiment does not limit the specific way of determining the sharpness detection result according to the first target image.

[0036] S120, determining the lateral resolution detection result of the polar sheet appearance detection system according to multiple second target images obtained by the shooting device taking static pictures of the second target region of the target image.

[0037] The second target region is a region in the target image used for lateral resolution distortion correction. The polar sheet feeding roller is rotated so that the second target region is located in the imaging range of the shooting device of the polar sheet appearance detection system. The second target region is kept stationary, and the shooting device takes pictures of the second target region to obtain multiple second target images. The second target images are sent to the calibration device of the polar sheet appearance detection system. Similarly, preferably, the shooting device can continuously capture more than ten second target images.

[0038] In the embodiment of the present application, the purpose of lateral resolution detection is to eliminate the distortion of the shooting device in the lateral direction. Therefore, optionally, the second target region can include a plurality of grid bars arranged in the lateral direction of the image. By judging whether the width of each grid bar in the second target image is consistent, it is determined whether the lateral resolution of the second target image meets the requirements. Similarly, if the lateral resolution of each second target image meets the requirements, or the ratio between the number of second target images with lateral resolution meeting the requirements and the total number of second target images is greater than a preset value, it is determined that the lateral resolution detection result is qualified. The embodiment does not limit the specific way of determining the lateral resolution detection result according to the second target image.

[0039] S130. Based on the multiple third target images obtained by the shooting device from the uniformly rotating target image, determine the longitudinal resolution detection result and the detection capability evaluation result of the electrode appearance inspection system.

[0040] In this embodiment of the invention, after performing sharpness detection and lateral resolution detection, the electrode feeding roller with the target image pasted on it rotates at a constant speed, and the imaging device dynamically captures the target image to obtain multiple third target images. Optionally, a trigger signal can be output by a coaxial encoder to control the imaging device to perform the imaging.

[0041] The target image may also include a third target region for verifying longitudinal resolution, and simulated defects for verifying detection capability. The third target image is obtained by photographing the uniformly rotating target image. Based on the third target region in the third target image, longitudinal resolution can be verified. By performing defect detection on the third target image and comparing the defect monitoring results with simulated defects, the electrode appearance inspection system's defect detection and classification capabilities can be evaluated.

[0042] S140. Based on the results of the sharpness test, the horizontal resolution test, the vertical resolution test, and the test capability evaluation, calibrate the electrode appearance inspection system.

[0043] In this embodiment of the invention, by calibrating and verifying the sharpness, lateral resolution, longitudinal resolution, and detection capability, the defect detection accuracy of the electrode appearance inspection system can be improved, ensuring the effectiveness of the electrode appearance inspection system throughout its service life. Furthermore, based on the sharpness detection results, lateral resolution detection results, longitudinal resolution detection results, and detection capability evaluation results, a quantitative evaluation of the defect detection capability of the electrode appearance inspection system is achieved, ensuring the consistency of detection capabilities among different electrode appearance inspection systems.

[0044] Optionally, the electrode appearance inspection system may be calibrated based on the sharpness test results, horizontal resolution test results, vertical resolution test results, and inspection capability evaluation results. This may include: issuing a fault warning if at least one of the sharpness test results, horizontal resolution test results, vertical resolution test results, and inspection capability evaluation results fails to meet the qualification conditions; and calibrating the electrode appearance inspection system based on the sharpness test results, horizontal resolution test results, vertical resolution test results, and / or inspection capability evaluation results that fail to meet the qualification conditions.

[0045] In this embodiment of the invention, the electrode appearance inspection system is deemed qualified only when the sharpness detection result, horizontal resolution detection result, vertical resolution detection result, and detection capability evaluation result are all qualified simultaneously. If any one of the above conditions is not met, the electrode appearance inspection system is deemed unqualified, a fault warning is issued, the electrode processing procedure is stopped, and the corresponding parameters are adjusted according to the unqualified result.

[0046] The technical solution of this invention involves using the imaging device of an electrode appearance inspection system to statically capture multiple first target images of a first target region of a target image, determining the sharpness detection result, and using multiple second target images obtained by statically capturing a second target region of the target image, determining the lateral resolution detection result. Using multiple third target images obtained by capturing a target image rotating at a constant speed, the longitudinal resolution detection result and the detection capability evaluation result are determined. Based on the above sharpness detection results, lateral resolution detection results, longitudinal resolution detection results, and detection capability evaluation results, the electrode appearance inspection system is calibrated. This invention, through quantitative evaluation of the detection capability of the electrode appearance inspection system, ensures the consistency of the detection capability of the same electrode appearance inspection system within its service life, and between different electrode appearance inspection systems.

[0047] Example 2

[0048] Figure 2a This is a flowchart of a calibration method for an electrode appearance inspection system provided in Embodiment 2 of the present invention. Based on the above embodiments, the present invention further specifies the process of determining the sharpness detection result based on the first target image, the process of determining the lateral resolution detection result based on the second target image, the process of determining the longitudinal resolution detection result and the detection capability evaluation result based on the third target image, and the process of calibrating the electrode appearance inspection system based on each result.

[0049] like Figure 2a As shown, the method includes:

[0050] S210. The target image obtained by the imaging device of the electrode appearance inspection system is obtained by shooting the first target area of ​​the target image.

[0051] The first target area includes multiple sets of triangles with opposite vertices perpendicular to the length of the roller, and the vertices of each triangle are covered by squares with equal side lengths.

[0052] Figure 2b A schematic diagram of a target image is provided, such as... Figure 2bAs shown, the length of the target image is the length of the electrode feeding roller, and the width is the circumference of the electrode feeding roller. The target image includes a first target area, a second target area, and a third target area. The first target area contains multiple sets of triangles. Each set of triangles consists of a triangle with one vertex pointing downwards along the vertical direction of the roller length, and two triangles with two vertices pointing upwards along the vertical direction of the roller length. The vertices of the triangles in the vertical direction along the roller length are covered by squares. All squares have the same side length. Optionally, the side length of the squares can be set to 1mm or 3mm, but this embodiment does not limit the size of the triangles or the size of the squares.

[0053] In this embodiment of the invention, before calibrating and verifying the clarity, lateral resolution, longitudinal resolution and detection capability of the electrode appearance inspection system, it is also necessary to align and adjust the target surface and target image of the imaging device. The purpose of this is to ensure that the target surface of the imaging device is parallel to the imaging surface of the electrode feeding roller.

[0054] Specifically, the imaging device is adjusted to a preset position, and the electrode feeding roller is rotated so that the first target area is within the imaging range of the imaging device. The imaging device then captures an image of the first target area to obtain a alignment target image, which is sent to the calibration device of the electrode appearance inspection system. The calibration device of the electrode appearance inspection system adjusts the angle of the imaging device based on the squares at the vertices of the triangles in the alignment target image.

[0055] S220. Calculate the number of pixels on the side of the square at each vertex of the triangle in the target image, and adjust the angle of the shooting device according to the number of pixels on each side.

[0056] Specifically, if the number of pixels on the side of the square at each vertex of the triangle in the target image is relatively close, that is, the number of pixels on each side is equal, or the difference between the number of pixels on each side is less than a preset difference threshold, then the shooting device is considered to have completed its setup and adjustment. Otherwise, based on the number of pixels on each side, the direction of angle adjustment for the shooting device is determined, and the angle of the shooting device is adjusted accordingly.

[0057] S230. Determine whether the maximum difference between the number of pixels on each side is less than or equal to the preset difference threshold. If yes, execute S240; otherwise, return to execute S210.

[0058] In this embodiment of the invention, after the imaging device is assembled and adjusted, the light source can also be adjusted. Specifically, while keeping the position of the imaging device fixed, the position of the light source is moved so that the central axis of the light source is aligned with the imaging position of the imaging device.

[0059] S240: The imaging device of the electrode appearance inspection system captures multiple first target images by statically photographing the first target area of ​​the target image.

[0060] The first target area includes multiple sets of continuous black and white line pairs arranged along the length of the roller.

[0061] like Figure 2b As shown, black and white line pairs and triangle groups are alternately distributed in the first target area. This embodiment does not limit the width of the black and white line pairs.

[0062] S250. Determine the clarity detection result of the electrode appearance inspection system based on the clarity value of each group of continuous black and white line pairs in each first target image.

[0063] In this embodiment of the invention, for the first target image, the sharpness value of the black and white line pairs is compared with the sharpness standard value. The specific method has been described in the above embodiment and will not be repeated here.

[0064] S260. Obtain multiple second target images obtained by the shooting device taking static pictures of the second target area of ​​the target image.

[0065] The second target area includes multiple black and white squares with equal spacing and width, arranged along the length of the roller.

[0066] like Figure 2b As shown, the second target area includes a series of black and white squares with equal spacing and width. Optionally, the width and spacing of the black and white squares can be set to 10mm, but this embodiment does not limit the width and spacing of the black and white squares.

[0067] S270. Based on the width pixel value of each black and white square in each second target image, determine the lateral resolution detection result of the electrode appearance inspection system.

[0068] Specifically, if the width pixel values ​​of each black and white square in the second target image are relatively close, that is, each width pixel value is equal, or the difference between each width pixel value is less than a preset width pixel difference threshold, then the lateral resolution of the second target image is determined to meet the requirements. If the lateral resolution of all second target images meets the requirements, or the ratio between the number of second target images with lateral resolution meeting the requirements and the total number of second target images is greater than a preset value, then the lateral resolution detection result is determined to be qualified.

[0069] S280. Obtain multiple third target images obtained by the shooting device from the uniformly rotating target image.

[0070] The target map further includes a third target region, which comprises multiple circles with equal spacing and diameter, arranged perpendicularly to the roll length direction. The first target region includes simulated defect calibration blocks.

[0071] like Figure 2bAs shown, the third target area consists of a series of equally spaced circles with the same diameter. Optionally, the spacing between the circular patterns can be set to 10-20 mm, and the diameter of the circles can be set to 5 mm. However, this embodiment does not limit the diameter of the circles or the spacing between the circular patterns. The first target area includes several simulated defect calibration blocks. The simulated defect calibration blocks can contain two-dimensional or three-dimensional simulated defects. For example, the simulated defect calibration blocks can be set to resemble the branding and exposed foil defects of the electrode coating, or they can be set to a conical shape. This embodiment does not limit the specific form and setting method of the simulated defect calibration blocks.

[0072] S290. Based on the number of vertical pixels in each circle of each third target image, determine the vertical resolution detection result of the electrode appearance inspection system.

[0073] Specifically, a pixel count curve can be generated based on the vertical pixel count of each circle in each third target image. The vertical resolution can then be calibrated based on the fluctuation of the pixel count curve. For example, if the fluctuation value of the pixel count curve is less than a preset fluctuation value, the vertical resolution is considered to have passed the verification, and the vertical resolution detection result is deemed acceptable.

[0074] S2100, Perform defect detection on each third target image to determine the target defect.

[0075] In this embodiment of the invention, after the imaging device captures the third target image, it sends each third target image to the electrode appearance inspection system. The electrode appearance inspection system performs defect detection on each third target image and sends the defect detection results to the calibration device of the electrode appearance inspection system.

[0076] S2110. Based on the area and contrast information of the target defect, determine the evaluation result of the detection capability of the electrode appearance inspection system.

[0077] Specifically, based on the actual area of ​​the simulated defect, the projected area of ​​the simulated defect in the third target image can be calculated. The detection capability evaluation result can be determined based on the number of target defects and simulated defects, the area and projected area of ​​the target defects, and the contrast of the target defects. For example, the closer the number of target defects is to the number of simulated defects, the stronger the detection capability; the closer the area and projected area of ​​the target defects are to each other, the stronger the detection capability; and the higher the contrast of the target defects, the stronger the detection capability.

[0078] S2120. Determine whether the sharpness test results, horizontal resolution test results, vertical resolution test results, and test capability evaluation results all meet the qualification conditions. If so, proceed to S2130; otherwise, proceed to S2140.

[0079] S2130, Confirm that the electrode appearance inspection system is qualified.

[0080] S2140, provide fault indication.

[0081] S2150. Based on the results of the sharpness test, the horizontal resolution test, the vertical resolution test, and / or the test capability evaluation results for those that do not meet the qualification conditions, the electrode appearance inspection system shall be calibrated.

[0082] The method for calibrating the electrode appearance inspection system based on each result item has been described in the above embodiments, and will not be repeated in this embodiment.

[0083] Example 3

[0084] Figure 3 This is a schematic diagram of the calibration device for an electrode appearance inspection system provided in Embodiment 3 of the present invention. This embodiment is applicable to situations where the electrode appearance inspection system is calibrated periodically. The calibration device for the electrode appearance inspection system can be implemented in hardware and / or software and can be configured in a computer device for use in conjunction with the electrode appearance inspection system.

[0085] like Figure 3 As shown, the device includes: a sharpness detection result determination module 310, a horizontal resolution detection result determination module 320, a vertical resolution detection result determination module 330, and an electrode appearance inspection system calibration module 340. Wherein:

[0086] The clarity detection result determination module 310 is used to determine the clarity detection result of the electrode appearance inspection system based on multiple first target images obtained by statically capturing the first target area of ​​the target image using the imaging device of the electrode appearance inspection system.

[0087] The lateral resolution detection result determination module 320 is used to determine the lateral resolution detection result of the electrode appearance inspection system based on multiple second target images obtained by the imaging device through static imaging of the second target area of ​​the target image.

[0088] The longitudinal resolution detection result determination module 330 is used to determine the longitudinal resolution detection result and detection capability evaluation result of the electrode appearance inspection system based on multiple third target images obtained by the imaging device from the target image being rotated at a constant speed.

[0089] The electrode appearance inspection system calibration module 340 is used to calibrate the electrode appearance inspection system based on the sharpness test results, horizontal resolution test results, vertical resolution test results, and test capability evaluation results.

[0090] Based on the above embodiments, the first target area includes multiple sets of triangles with opposite vertex directions along the vertical direction of the roller length, and the vertex of each triangle is covered by a square with equal side length.

[0091] The device further includes:

[0092] The alignment target image acquisition module is used to acquire the alignment target image obtained by the imaging device of the electrode appearance inspection system capturing the first target area of ​​the target image.

[0093] The side length pixel count calculation module is used to calculate the side length pixel count of the square at each vertex of the triangle in the target image, so as to adjust the angle of the shooting device according to the side length pixel count.

[0094] The difference judgment module is used to repeatedly execute the operation of the imaging device of the electrode appearance inspection system to capture the first target area of ​​the target image until the maximum difference of the number of pixels of each side length is less than or equal to the preset difference threshold.

[0095] Based on the above embodiments, the first target area includes multiple sets of continuous black and white line pairs arranged along the length of the roller;

[0096] Sharpness detection result determination module 310 includes:

[0097] The first target image acquisition unit is used to acquire multiple first target images obtained by the imaging device of the electrode appearance inspection system through static imaging of the first target area of ​​the target image.

[0098] The sharpness detection result determination unit is used to determine the sharpness detection result of the electrode appearance inspection system based on the sharpness value of each group of continuous black and white line pairs in each first target image.

[0099] Based on the above embodiments, the second target area includes a plurality of black and white squares with equal spacing and width arranged along the length of the roller;

[0100] The lateral resolution detection result determination module 320 includes:

[0101] The second target image acquisition unit is used to acquire multiple second target images obtained by the shooting device through static shooting of the second target area of ​​the target image;

[0102] The lateral resolution detection result determination unit is used to determine the lateral resolution detection result of the electrode appearance inspection system based on the width pixel value of each black and white square in each second target image.

[0103] Based on the above embodiments, the target map further includes a third target region, which includes a plurality of circles arranged perpendicular to the length of the roller, with equal spacing and diameter;

[0104] The longitudinal resolution detection result determination module 330 includes:

[0105] The third target image acquisition unit is used to acquire multiple third target images obtained by the shooting device from the target image rotating at a constant speed.

[0106] The longitudinal resolution detection result determination unit is used to determine the longitudinal resolution detection result of the electrode appearance inspection system based on the number of longitudinal pixels of each circle in each third target image.

[0107] Based on the above embodiments, the first target region includes a simulated defect calibration block;

[0108] The longitudinal resolution detection result determination module 330 includes:

[0109] The target defect determination unit is used to perform defect detection on each third target image and determine the target defect.

[0110] The detection capability evaluation result determination unit is used to determine the detection capability evaluation result of the electrode appearance inspection system based on the area and contrast information of the target defect.

[0111] Based on the above embodiments, the electrode appearance inspection system calibration module 340 includes:

[0112] The fault indication unit is used to issue a fault indication if at least one of the following is determined to be a sharpness test result, a horizontal resolution test result, a vertical resolution test result, and a test capability evaluation result that does not meet the qualification conditions.

[0113] The electrode appearance inspection system calibration unit is used to calibrate the electrode appearance inspection system based on the sharpness test results, horizontal resolution test results, vertical resolution test results and / or test capability evaluation results that do not meet the qualification conditions.

[0114] The calibration device for the electrode appearance inspection system provided in this embodiment of the invention can execute the calibration method for the electrode appearance inspection system provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0115] Example 4

[0116] Figure 4 This is a schematic diagram of the structure of a computer device provided in Embodiment 4 of the present invention, as shown below. Figure 4 As shown, the computer device includes a processor 70, a memory 71, an input device 72, and an output device 73; the number of processors 70 in the computer device can be one or more. Figure 4 Taking a processor 70 as an example; the processor 70, memory 71, input device 72, and output device 73 in a computer device can be connected via a bus or other means. Figure 4 Taking the example of a connection between China and Israel via a bus.

[0117] The memory 71, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the modules corresponding to the calibration method of the electrode appearance inspection system in this embodiment of the invention (e.g., the sharpness detection result determination module 310, the horizontal resolution detection result determination module 320, the vertical resolution detection result determination module 330, and the electrode appearance inspection system calibration module 340 in the calibration device of the electrode appearance inspection system). The processor 70 executes various functional applications and data processing of the computer device by running the software programs, instructions, and modules stored in the memory 71, thereby implementing the aforementioned calibration method of the electrode appearance inspection system. This method includes:

[0118] The clarity test result of the electrode appearance inspection system is determined based on multiple first target images obtained by statically capturing the first target area of ​​the target image using the imaging device of the electrode appearance inspection system.

[0119] Based on multiple second target images obtained by statically capturing the second target area of ​​the target image using the shooting device, the lateral resolution detection result of the electrode appearance inspection system is determined.

[0120] Based on multiple third target images obtained by the imaging device from the uniformly rotating target image, the longitudinal resolution detection result and detection capability evaluation result of the electrode appearance inspection system are determined.

[0121] The electrode appearance inspection system is calibrated based on the results of sharpness detection, horizontal resolution detection, vertical resolution detection, and detection capability evaluation.

[0122] The memory 71 may primarily include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a given function; the data storage area may store data created based on terminal usage. Furthermore, the memory 71 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory, or other non-volatile solid-state storage device. In some instances, the memory 71 may further include memory remotely located relative to the processor 70, which can be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0123] Input device 72 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the computer device. Output device 73 may include display devices such as a display screen.

[0124] Example 5

[0125] Embodiment 5 of the present invention also provides a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform a calibration method for an electrode appearance inspection system, the method comprising:

[0126] The clarity test result of the electrode appearance inspection system is determined based on multiple first target images obtained by statically capturing the first target area of ​​the target image using the imaging device of the electrode appearance inspection system.

[0127] Based on multiple second target images obtained by statically capturing the second target area of ​​the target image using the shooting device, the lateral resolution detection result of the electrode appearance inspection system is determined.

[0128] Based on multiple third target images obtained by the imaging device from the uniformly rotating target image, the longitudinal resolution detection result and detection capability evaluation result of the electrode appearance inspection system are determined.

[0129] The electrode appearance inspection system is calibrated based on the results of sharpness detection, horizontal resolution detection, vertical resolution detection, and detection capability evaluation.

[0130] Of course, the computer-executable instructions provided in the embodiments of the present invention are not limited to the method operations described above, but can also perform related operations in the calibration method of the electrode appearance inspection system provided in any embodiment of the present invention.

[0131] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0132] It is worth noting that in the embodiments of the calibration device of the above-mentioned electrode appearance inspection system, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the scope of protection of the present invention.

[0133] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A calibration method for an electrode appearance inspection system, characterized in that, include: The clarity test result of the electrode appearance inspection system is determined based on multiple first target images obtained by statically capturing the first target area of ​​the target image using the imaging device of the electrode appearance inspection system. Based on multiple second target images obtained by statically capturing the second target area of ​​the target image using the shooting device, the lateral resolution detection result of the electrode appearance inspection system is determined. Based on multiple third target images obtained by the imaging device from the uniformly rotating target image, the longitudinal resolution detection result and detection capability evaluation result of the electrode appearance inspection system are determined. The electrode appearance inspection system is calibrated based on the sharpness detection results, horizontal resolution detection results, vertical resolution detection results, and detection capability evaluation results; wherein, the sharpness detection results are determined by comparing the sharpness corresponding to the first target area in each first target image with the sharpness standard value. The first target area includes multiple sets of triangles with opposite vertex directions perpendicular to the length of the roller, and the vertices of each triangle are covered by squares with equal side lengths. Before determining the sharpness detection result of the electrode appearance inspection system based on multiple first target images obtained by statically capturing the first target area of ​​the target image using the imaging device of the electrode appearance inspection system, the following steps are also included: The target image obtained by the imaging device of the electrode appearance inspection system is the line target image obtained by capturing the first target area of ​​the target image; Calculate the number of pixels on the side of the square at each vertex of the triangle in the target image, and adjust the angle of the shooting device according to the number of pixels on each side. Repeat the operation of the imaging device of the electrode appearance inspection system to capture the first target area of ​​the target image to obtain the line target image until the maximum difference of the number of pixels of each side length is less than or equal to the preset difference threshold.

2. The method according to claim 1, characterized in that, The first target area includes multiple sets of continuous black and white line pairs arranged along the length of the roller; Based on multiple first target images obtained by statically capturing the first target area of ​​the target image using the imaging device of the electrode appearance inspection system, the sharpness detection results of the electrode appearance inspection system are determined, including: Multiple first target images are obtained by the imaging device of the electrode appearance inspection system taking static pictures of the first target area of ​​the target image. The clarity test results of the electrode appearance inspection system are determined based on the clarity values ​​of each pair of continuous black and white lines in each first target image.

3. The method according to claim 1, characterized in that, The second target area includes multiple black and white squares with equal spacing and width, arranged along the length of the roller; Based on multiple second target images obtained by statically capturing the second target region of the target image using the imaging device, the lateral resolution detection result of the electrode appearance inspection system is determined, including: Multiple second target images are obtained by the imaging device taking static images of the second target region of the target image. The lateral resolution detection result of the electrode appearance inspection system is determined based on the width pixel value of each black and white square in each second target image.

4. The method according to claim 1, characterized in that, The target diagram also includes a third target region, which comprises a plurality of circles arranged perpendicular to the length of the roller, with equal spacing and diameter. Based on multiple third target images obtained by the imaging device from a uniformly rotating target image, the longitudinal resolution detection result of the electrode appearance inspection system is determined, including: Multiple third target images are obtained by the imaging device capturing images of a target rotating at a constant speed. The vertical resolution detection result of the electrode appearance inspection system is determined based on the vertical pixel count of each circle in each third target image.

5. The method according to claim 4, characterized in that, The first target region includes a simulated defect calibration block; Based on multiple third target images obtained by the imaging device from a uniformly rotating target image, the detection capability evaluation result of the electrode appearance inspection system is determined, including: Defect detection is performed on each third target image to identify target defects; Based on the area and contrast information of the target defect, the evaluation result of the detection capability of the electrode appearance inspection system is determined.

6. The method according to claim 1, characterized in that, Based on the results of sharpness detection, horizontal resolution detection, vertical resolution detection, and detection capability evaluation, the electrode appearance inspection system is calibrated, including: If at least one of the following is determined to be a failure to meet the qualification criteria: sharpness test result, horizontal resolution test result, vertical resolution test result, and test capability evaluation result, a fault prompt will be issued. The electrode appearance inspection system is calibrated based on the results of sharpness testing, horizontal resolution testing, vertical resolution testing, and / or testing capability evaluation for those that do not meet the qualification requirements.

7. A calibration device for an electrode appearance inspection system, characterized in that, include: The clarity detection result determination module is used to determine the clarity detection result of the electrode appearance inspection system based on multiple first target images obtained by statically capturing the first target area of ​​the target image using the imaging device of the electrode appearance inspection system. The lateral resolution detection result determination module is used to determine the lateral resolution detection result of the electrode appearance inspection system based on multiple second target images obtained by the imaging device through static imaging of the second target area of ​​the target image. The longitudinal resolution detection result determination module is used to determine the longitudinal resolution detection result and detection capability evaluation result of the electrode appearance inspection system based on multiple third target images obtained by the imaging device from the target image rotating at a constant speed. The electrode appearance inspection system calibration module is used to calibrate the electrode appearance inspection system based on the sharpness detection results, horizontal resolution detection results, vertical resolution detection results, and detection capability evaluation results; wherein, the sharpness detection results are determined by comparing the sharpness corresponding to the first target area in each first target image with the sharpness standard value. The device further includes: The alignment target image acquisition module is used to acquire the alignment target image obtained by the imaging device of the electrode appearance inspection system capturing the first target area of ​​the target image. The side length pixel count calculation module is used to calculate the side length pixel count of the square at each vertex of the triangle in the target image, so as to adjust the angle of the shooting device according to the side length pixel count. The difference judgment module is used to repeatedly execute the operation of the imaging device of the electrode appearance inspection system to capture the first target area of ​​the target image until the maximum difference of the number of pixels of each side length is less than or equal to the preset difference threshold.

8. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the calibration method of the electrode appearance inspection system as described in any one of claims 1-6.

9. A storage medium for storing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform the calibration method of the electrode appearance inspection system as described in any one of claims 1-6.

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