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Welding spot region detection method

A technology for area detection and solder joints, applied in measurement devices, optical testing flaws/defects, image data processing, etc., can solve the problems of film misjudgment, affecting production yield, etc., to improve production efficiency and reduce misjudgment rate. Effect

Inactive Publication Date: 2017-07-25
SHENZHEN SINOMV TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a detection method for the solder joint area, so as to overcome the shortcomings of the existing detection technology that will cause misjudgment when the film is reflective, thereby affecting the production yield

Method used

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Experimental program
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Embodiment

[0017] Such as figure 1 and Figure 5 As shown, a schematic structural diagram of a method for detecting a solder joint area according to a preferred embodiment of the present invention, which includes the following steps:

[0018] Step 1: Set a designated detection position on the lithium battery production line. When the product needs to be detected after the electrode welding is completed, the product is transported to the designated position, and the film area is photographed by a color camera to obtain the film area and its A color image of the surrounding background.

[0019] Step 2: Divide the color image obtained in Step 1 into six single-channel images of RGB or HSV to obtain six images, and then take the two images with the largest grayscale difference of the thin film area in the six images for grayscale comparison. subtracted, so that figure 2 The image shown in T.

[0020] Step 3: Perform threshold segmentation on the image T obtained in step 2 to obtain the ...

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PUM

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Abstract

The invention discloses a welding spot region detection method. The method comprises the following steps of 1, conveying a product to a designated position, and photographing a film region by a color camera; 2, dividing an obtained color image into six RGB or HSV single-channel images, and subtracting two images, largest in gray scale difference among all the six images, to obtain an image T; 3, subjecting the image T to threshold segmentation to obtain the film region; 4, comparing a fixed welding spot region with the above identified film region; on the condition that the film region does not completely cover the welding spot region, judging a product to be a unqualified welding product; otherwise, judging the product to be a qualified welding product; 5, outputting a detection result. During the step 3, firstly, the pixel points of the image T, with the gray values thereof distributed in a dense region, are calibrated. Secondly, the pixels of the calibrated pixel points are connected continuously together to be combined as an element, and one element largest in area is identified as the film region. According to the technical scheme of the invention, the detection misjudgment rate is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a method for detecting a welding spot area. Background technique [0002] The products produced by the factory now use machines to gradually replace manual labor to complete some tedious, repetitive or high-precision work, and manufacture various equipment to complete the corresponding work to avoid human fatigue caused by long-term work and work mistakes that affect production. At present, in the production process of lithium batteries, a thin film needs to be pasted on the counter electrode before welding. In order to make the welding work normally, the thin film needs to completely cover the solder joint area. The film is a green film, and the electrode is gold or silver. After the welding is completed, the solder joint area needs to be detected. The existing detection technology is to use a black and white camera to take pictures of the area, and then perform threshold segme...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/11G06T7/136G01N21/88
CPCG06T7/0006G01N21/8851G01N2021/8887G06T2207/10024G06T2207/30152
Inventor 李龙强李明
Owner SHENZHEN SINOMV TECH CO LTD