Car body-in-white welding spot positioning method and device based on robot visual servo

Abstract

The invention discloses a car body-in-white welding spot positioning method and device based on robot visual servo. The method comprises the steps that a partial car body image with body-in-white welding spots is collected and stored in a storage unit, and the image is read from the storage unit; the image is preprocessed; edge extraction is performed on the preprocessed image; the position coordinates and radius sizes of the car body-in-white welding spot or circular hole targets in the image are acquired by utilizing random Hough transformation; a target image is intercepted, feature extraction and classification recognition are performed on the target image, and a positioning coordinate is obtained and transmitted to a robot control system. According to the car body-in-white welding spot positioning method and device, quick and automatic recognizing and positioning of a car body-in-white welding spot quality detection robot on the body-in-white welding spots to be detected are achieved, the car body-in-white welding spot quality detection robot can be guided to accurately position the body-in-white welding spots, and the key technical problems are solved for achieving intelligent detection of the car body-in-white welding spot quality detection robot on the welding spot quality on a car industry manufacturing production line.

Description

technical field [0001] The invention relates to the field of automobile body-in-white welding, and more particularly, relates to a method and device for positioning welding spots of an automobile body-in-white based on robot vision servo. Background technique [0002] In the automobile manufacturing process, spot welding has become the main connection process method in the automobile manufacturing industry, and plays an irreplaceable important role in the automobile manufacturing industry. The integrity of spot welding determines the overall structural rigidity and integrity of the car, so the welding quality of spot welding is directly related to the quality and performance of the car body and car. [0003] Under China's current national conditions, the input cost of spot welding automatic production lines is quite high. In order to reduce costs, many stations are done manually, such as welding and the manufacture of many parts. In the process of welding and parts manufac...

AI Technical Summary

Problems solved by technology

Such manual quality inspection of the solder joints of the white car body, on the one hand, the detection efficiency is not very high, which affects the production capacity of the car

On the other hand, the sampling inspection results in that all the solder joints of the body-in-white cannot be fully inspected, and the quality of the cars put on the market cannot be guaranteed.

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