Method for automatically detecting center distance of battery tabs

Abstract

The invention discloses a method for automatically detecting center distance of battery tabs. The detection system comprises an image processing unit, a motion control unit, a real-time monitoring unit and an upper computer, wherein the image processing unit performs software processing analysis on the acquired image to detect the size of the center distance of the tabs, namely the process comprises the steps: finding reference lines I1 and I2, a bottom reference line I8, and segments I4, I5, I6 and I7 through an image recognition method; fitting a central line I3 through the lines I1 and I2, respectively determining the vertexes R1 and R2 of positive and negative tabs through the intersection of the lines I4 and I5 and the intersection of the lines I6 and I7, and respectively determining base points R3 and R4 of the positive and negative tabs through the intersection of the lines I4 and I8 and the intersection of the lines I6 and I8; and respectively calculating the distances W1-W4 from the points R1-R4 to the central line I3, wherein the value is the center distance of the tabs. According to the method, the size of the center distance of the battery tabs can be rapidly, accurately and automatically detected.

Description

technical field [0001] The patent of the invention relates to a product size detection method, in particular to a machine vision-based automatic detection method for the center distance of battery lugs, which belongs to the field of product detection. Background technique [0002] Tabs are a raw material for the production of lithium-ion polymer batteries, such as mobile phone batteries, Bluetooth batteries, and notebook batteries used in daily life. The battery is divided into positive and negative poles, and the tab is the metal electric body that leads the positive and negative poles out of the battery cell. In the production process of mobile phone batteries, measuring the size of the positive and negative tabs of the battery is a very important process before battery packaging. Batteries of different specifications have different process requirements for the size of the tabs. [0003] The appearance of the battery to be tested is as follows: figure 1 As shown, the bat...

AI Technical Summary

Problems solved by technology

[0004] At present, in the battery production process, most companies usually rely on traditional measurement methods for the size detection of tabs, such as using tools such as micrometers, vernier calipers or gauges, which require a lot of labor to complete, which not only increases labor costs and management costs, and due to the fatigue and instability of the human eye, the accuracy of detection cannot be guaranteed

In addition, with the expansion of production scale and the improvement of production line speed, manual inspection has great limitations in speed, which cannot meet the speed requirements of modern large industrial production lines.

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