Diaphragm detection method, device and apparatus

Patent metadata

Field	Value
Publication number	US-12475549-B2
Application number	US-202318467430-A
Country	US
Kind code	B2
Filing date	Sep 14, 2023
Priority date	Apr 6, 2022
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A diaphragm detection method includes acquiring a target image of an electrode plate to be detected. The electrode plate to be detected includes an anode electrode plate and diaphragms respectively stacked on two sides of the anode electrode plate. The method further includes performing image processing on the target image to determine a target image region in the target image, and performing diaphragm misalignment detection on the electrode plate to be detected based on the target image region.

First claim

What is claimed is:

1 . A diaphragm detection method, comprising:
acquiring a target image of an electrode plate to be detected, wherein the electrode plate to be detected comprises an anode electrode plate and diaphragms respectively stacked on two sides of the anode electrode plate; performing image processing on the target image to determine a target image region in the target image; and performing diaphragm misalignment detection on the electrode plate to be detected based on the target image region, comprising:
acquiring a number of diaphragm image sub-regions in the target image region, comprising:
performing grayscale image segmentation processing on the target image region to obtain a number N of diaphragm image sub-regions with different grayscales, where N is a positive integer and represents the number of diaphragm image sub-regions in the target image; and

determining a diaphragm misalignment result of the electrode plate to be detected based on the number of diaphragm image sub-regions in the target image region, wherein the diaphragm misalignment result is configured to indicate whether the diaphragms of the electrode plate to be detected are misaligned.

2 . The method of claim 1 , wherein determining the diaphragm misalignment result of the electrode plate to be detected based on the number of diaphragm image sub-regions in the target image region comprises:
under a condition that the number of diaphragm image sub-regions in the target image is a first preset number, determining that the diaphragm misalignment result of the electrode plate to be detected is a first sub-result, wherein the first sub-result is configured to indicate that the diaphragms of the electrode plate to be detected are not misaligned; and under a condition that the number of diaphragm image sub-regions in the target image is a second preset number, determining that the diaphragm misalignment result of the electrode plate to be detected is a second sub-result, wherein the second preset number is different from the first preset number, and the second sub-result is configured to indicate that the diaphragms of the electrode plate to be detected are misaligned.

3 . The method of claim 2 , further comprising:
under a condition that the number of diaphragm image sub-regions in the target image is a third preset number, outputting fault prompt information, wherein the third preset number is different from the first preset number and the second preset number.

4 . The method of claim 1 , further comprising, after performing diaphragm misalignment detection on the electrode plate to be detected based on the target image region:
under a condition that it is detected that the diaphragms of the electrode plate to be detected are misaligned, determining a misalignment amount of the diaphragms in the electrode plate to be detected based on the target image region.

5 . The method of claim 4 , wherein determining the misalignment amount of the diaphragms in the electrode plate to be detected based on the target image region comprises:
determining a single-layer diaphragm region and a double-layer diaphragm region in diaphragm image sub-regions of the target image, wherein the single-layer diaphragm region is a diaphragm image sub-region of the anode electrode plate and a diaphragm on one side and the double-layer diaphragm region is a diaphragm image sub-region of the anode electrode plate and the diaphragms on both sides; performing edge detection on the single-layer diaphragm region and the double-layer diaphragm region, to obtain a first region edge of the single-layer diaphragm region and a second region edge of the double-layer diaphragm region, wherein the second region edge corresponds to the first region edge; and determining a spacing between the first region edge and the second region edge as the misalignment amount of the diaphragms in the electrode plate to be detected.

6 . The method of claim 5 , further comprising:
acquiring a third region edge, wherein the third region edge is an edge of an image region corresponding to the anode electrode plate or a cathode electrode plate in the target image, and the third region edge corresponds to the second region edge; and determining a spacing between the third region edge and the second region edge.

7 . A non-transitory readable storage medium having stored programs or instructions thereon, wherein the programs or instructions, when executed by a processor, implement the diaphragm detection method of claim 1 .

8 . A diaphragm detection device, comprising:
an image acquisition module configured to acquire a target image of an electrode plate to be detected, wherein the electrode plate to be detected comprises an anode electrode plate and diaphragms respectively stacked on two sides of the anode electrode plate; an image region determination module configured to perform image processing on the target image to determine a target image region in the target image; and a misalignment detection module configured to perform diaphragm misalignment detection on the electrode plate to be detected based on the target image region, wherein the misalignment detection module comprises:
a region number acquisition unit configured to acquire a number of diaphragm image sub-regions in the target image region, and is specifically configured to:
perform grayscale image segmentation processing on the target image region to obtain a number N of diaphragm image sub-regions with different grayscales, where N is a positive integer and represents the number of diaphragm image sub-regions in the target image; and

a misalignment result determination unit configured to determine a diaphragm misalignment result of the electrode plate to be detected based on the number of diaphragm image sub-regions in the target image region, wherein the diaphragm misalignment result is configured to indicate whether the diaphragms of the electrode plate to be detected are misaligned, and the misalignment result determination unit comprises:
a first sub-result determination sub-unit configured to: under a condition that the number of diaphragm image sub-regions in the target image is a first preset number, determine that the diaphragm misalignment result of the electrode plate to be detected is a first sub-result, wherein the first sub-result is configured to indicate that the diaphragms of the electrode plate to be detected are not misaligned; and
a second sub-result determination sub-unit configured to: under a condition that the number of diaphragm image sub-regions in the target image is a second preset number, determine that the diaphragm misalignment result of the electrode plate to be detected is a second sub-result, wherein the second preset number is different from the first preset number, and the second sub-result is configured to indicate that the diaphragms of the electrode plate to be detected are misaligned.

9 . The device of claim 8 , further comprising:
a prompt information output module configured to: under a condition that the number of diaphragm image sub-regions in the target image is a third preset number, output fault prompt information, wherein the third preset number is different from the first preset number and the second preset number.

10 . The device of claim 9 , further comprising:
a misalignment amount determination module configured to: under a condition that it is detected that the diaphragms of the electrode plate to be detected are misaligned, determine a misalignment amount of the diaphragms in the electrode plate to be detected based on the target image region.

11 . The device of claim 10 ,
wherein the misalignment amount determi

Assignees

• Contemporary Amperex Technology Hong Kong Ltd

Inventors

• Duan Pengfei
• Ni Dajun
• Hu Jun
• Feng Shiping
• Wu Qing

Classifications

• G06T2207/30108

  Industrial image inspection · CPC title

• G06T7/13

  Edge detection · CPC title

• G06T7/11

  Region-based segmentation · CPC title

• H01M50/403

  Manufacturing processes of separators, membranes or diaphragms · CPC title

• G01B11/028

  by measuring lateral position of a boundary of the object (G01B11/022, G01B11/024, G01B11/04 take precedence) · CPC title