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CN-121998944-A - Battery diaphragm spot coating detection system and detection method

CN121998944ACN 121998944 ACN121998944 ACN 121998944ACN-121998944-A

Abstract

The invention belongs to the technical field of image data processing, and in particular relates to a battery diaphragm spot-coating detection system and a detection method, wherein the battery diaphragm spot-coating detection system comprises a control module and a multi-station visual detection device; the invention can obviously display the coating points and the background areas by dividing the original gray image into a plurality of gray adjustment areas and setting proper gray values in each gray adjustment area, and can avoid the problem that the point coating defects cannot be accurately identified due to the excessive brightness or darkness of local areas in the original gray image, thereby realizing the improvement of the identification precision and the identification efficiency.

Inventors

  • CHEN LI
  • XIA LINWEN

Assignees

  • 江苏图恩视觉科技有限公司

Dates

Publication Date
20260508
Application Date
20260127

Claims (10)

  1. 1. A battery separator spot coating detection system, comprising: control module and multi-station visual inspection device, wherein The multi-station visual detection device is electrically connected with the control module; the control module is configured to collect an original gray image of the battery diaphragm after spot coating through the multi-station visual detection device; The control module is also configured to divide a plurality of gray adjustment areas in the original gray image, and respectively perform corresponding gray adjustment on each gray adjustment area to form a gray image to be identified, and The control module is further configured to perform image recognition on the gray image to be recognized so as to judge whether the point coating defect exists in the gray image to be recognized.
  2. 2. The battery separator dispensing inspection system of claim 1, wherein, The multi-station visual detection device comprises a plurality of cameras and a plurality of line scanning LED light sources; the line scanning LED light source emits light to the battery diaphragm, so that the light is reflected or transmitted by the battery diaphragm and then enters the corresponding camera, and the control module acquires the corresponding original gray level image.
  3. 3. The battery separator dispensing inspection system of claim 2, wherein, The battery diaphragm is conveyed by the conveying roller set, a plurality of cameras and corresponding line scanning LED light sources are positioned on the same side of the battery diaphragm, and the cameras are sequentially arranged and parallel to the line scanning LED light sources; The line scanning LED light source is suitable for polishing the battery diaphragm, and reflects the light to each camera through the battery diaphragm, namely, an original gray image after the battery diaphragm is dotted and coated is collected.
  4. 4. The battery separator dispensing inspection system of claim 2, wherein, The battery diaphragm is conveyed by the conveying roller set, a plurality of cameras and corresponding line scanning LED light sources are respectively positioned at two sides of the battery diaphragm, and the cameras are sequentially arranged and parallel to the line scanning LED light sources; The line scanning LED light source is suitable for polishing the battery diaphragm, and transmits the light to each camera through the battery diaphragm, namely, the original gray level image after the battery diaphragm is dotted and coated is collected.
  5. 5. The battery separator dispensing inspection system of claim 1, wherein, The control module performs image recognition on the gray image to be recognized to judge whether the gray image to be recognized has a point coating defect or not, and the control module comprises the following steps: Dividing a gray image to be identified into a plurality of blocks; Calculating the gray threshold of each block through Niblack algorithm to distinguish the coating point and the background area; and detecting the coating points and the background areas in the blocks through image recognition to judge whether the coating defects exist.
  6. 6. The battery separator dispensing inspection system of claim 5, The spot coating defects comprise sticking spots, missing spots, abnormal coating spot diameters, abnormal coating spot transverse spacing, abnormal coating spot longitudinal spacing and abnormal coating spot coverage rate.
  7. 7. The battery separator dispensing inspection system of claim 1, wherein, The control module divides a plurality of gray adjustment areas in an original gray image, and respectively carries out corresponding gray adjustment on each gray adjustment area to form a gray image to be identified, and the control module comprises: acquiring an image background gray average value; Acquiring global gray characteristic parameters of an original gray image; Inputting the image background gray average value and the global gray characteristic parameter into Sauvola algorithm to calculate gray boundary parameter; Dividing an original gray image into a plurality of gray adjustment areas according to gray boundary parameters; and each gray adjustment area respectively carries out corresponding gray adjustment to form a gray image to be identified.
  8. 8. The battery separator dispensing inspection system of claim 7, Inputting Sauvola the image background gray average value and the global gray characteristic parameter into an algorithm to calculate gray boundary parameters, wherein the algorithm comprises the following steps: ; ; Wherein, the In order to adaptively adjust the parameters of the device, Is the gray-scale lower limit boundary of the gray-scale adjustment region, Is the gray upper boundary of the gray adjustment region.
  9. 9. The battery separator dispensing inspection system of claim 8, Dividing the original gray image into a plurality of gray adjustment regions according to gray boundary parameters, which comprises: Dividing an original gray image into a plurality of blocks according to the block size parameters, and calculating the corresponding row number and column number, namely obtaining the coordinates of each block; calculating the average gray level of each block, and obtaining a comparison result with gray level boundary parameters; and constructing a corresponding gray scale adjustment area according to the coordinates and the comparison result of each block.
  10. 10. A detection method using the battery separator spot-coating detection system according to any one of claims 1 to 9, comprising: the control module acquires an original gray image of the battery diaphragm after spot coating through a multi-station visual detection device; The control module divides a plurality of gray adjustment areas in the original gray image, and respectively carries out corresponding gray adjustment on each gray adjustment area so as to form a gray image to be identified; the control module performs image recognition on the gray level image to be recognized so as to judge whether the gray level image to be recognized has a point coating defect or not.

Description

Battery diaphragm spot coating detection system and detection method Technical Field The invention belongs to the technical field of image data processing, and particularly relates to an image analysis system, in particular to a battery diaphragm spot coating detection system and a detection method. Background When an industrial camera recognizes coating points, gray scales of different positions in an image are different in a visual recognition process due to factors such as a lighting angle, a camera acquisition angle and different coating points, and if all the coating points are recognized by the same gray scales in the image recognition process, some coating points can be misjudged. Therefore, it is needed to develop a new battery diaphragm spot coating detection system and a new battery diaphragm spot coating detection method to solve the technical problem of erroneous judgment caused by the deviation of gray scales of coated spots in the process of acquisition and identification. It should be noted that the above information disclosed in this background section is only for understanding the background of the inventive concept and therefore the above description is not to be construed as constituting prior art information. Disclosure of Invention The embodiment of the disclosure at least provides a battery diaphragm spot coating detection system and a detection method. In a first aspect, an embodiment of the disclosure provides a battery diaphragm dispensing detection system, which comprises a control module and a multi-station visual detection device, wherein the multi-station visual detection device is electrically connected with the control module, the control module is configured to collect an original gray image of a battery diaphragm after dispensing through the multi-station visual detection device, the control module is further configured to separate a plurality of gray adjustment areas from the original gray image, and respectively perform corresponding gray adjustment on each gray adjustment area to form a gray image to be identified, and the control module is further configured to perform image identification on the gray image to be identified to judge whether a dispensing defect exists in the gray image to be identified. In an alternative implementation mode, the multi-station visual detection device comprises a plurality of cameras and a plurality of line scanning LED light sources, wherein the line scanning LED light sources emit light to the battery diaphragm, so that the light is reflected or transmitted by the battery diaphragm and then is emitted into the corresponding cameras, and the control module acquires the corresponding original gray level image. In an alternative implementation mode, the battery diaphragm is conveyed through the conveying roller set, a plurality of cameras and corresponding line scanning LED light sources are located on the same side of the battery diaphragm, the cameras are sequentially arranged and parallel to the line scanning LED light sources, the line scanning LED light sources are suitable for polishing the battery diaphragm and are reflected to the cameras through the battery diaphragm, and then the original gray level images after the battery diaphragm is dotted and coated are collected. In an alternative implementation mode, the battery diaphragm is conveyed through the conveying roller set, a plurality of cameras and corresponding line scanning LED light sources are respectively located on two sides of the battery diaphragm, the cameras are sequentially arranged and parallel to the line scanning LED light sources, the line scanning LED light sources are suitable for polishing the battery diaphragm and are transmitted to the cameras through the battery diaphragm, and then original gray images of the battery diaphragm after spot coating are collected. In an alternative implementation mode, the control module performs image recognition on the gray image to be recognized to judge whether the point coating defect exists in the gray image to be recognized, and the control module comprises the steps of dividing the gray image to be recognized into a plurality of blocks, calculating a gray threshold value of each block through Niblack algorithm to distinguish a coating point and a background area, and detecting the coating point and the background area in the blocks through image recognition to judge whether the point coating defect exists. In an alternative embodiment, the spot coating defect includes a sticking spot, a missing spot, an anomaly in the diameter of the coating spot, an anomaly in the lateral spacing of the coating spot, an anomaly in the longitudinal spacing of the coating spot, and an anomaly in the coverage of the coating spot. In an alternative embodiment, the control module divides the original gray image into a plurality of gray adjustment areas, and respectively performs corresponding gray adjustment on each gray adjustment area to fo