Stereovision-based method and stereovision-based device for detecting vehicle wheelbase difference

Abstract

The invention relates to a stereovision-based method and a stereovision-based device for detecting a vehicle wheelbase difference and belongs to vehicle performance detection equipment. The method and the device are mainly used to automatically detect the vehicle wheelbase difference on a vehicle comprehensive performance detection line. According to vehicle wheel images captured by four cameras, the detection device identifies the center three-dimensional coordinates of the vehicle wheel images by adopting a computer image processing technology and calculates the vehicle wheelbase difference on the basis of the center three-dimensional coordinates of the vehicle wheels. The system hardware comprises the cameras, an industrial control computer, an opposite-type photoelectric sensor, a revolving platform and a customized calibration target. The method and the device can rapidly and accurately detect the vehicle wheelbase difference. The method has the advantages of unique design idea, excellent linearity, less systematic error, excellent detection precision and repeatability, simple structure and convenient use. The research results have a certain theoretical value and economic value and good prospect of application and popularization.

Description

technical field [0001] The invention belongs to detection equipment for automobile performance, which is based on computer stereo vision and adopts an image processing method to accurately detect the difference between left and right of automobile wheelbase. It has good linearity, small system error, good detection accuracy and repeatability, simple structure and convenient installation. Background technique [0002] The national standard GB7258-2004 stipulates that when a car is running in a straight line, the center line of the front and rear axles of the car should be consistent with the direction of the road surface, that is, specific requirements are put forward for the difference between the left and right wheelbases of the car. Initially, the method of detecting the left and right difference of the vehicle wheelbase is manual measurement, which has low efficiency and large human error. Nowadays, there are mainly laser method and photosensitive method: the laser metho...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a method and device for detecting the left and right difference of the automobile wheelbase based on stereo vision, so as to overcome the shortcomings of the existing laser method, such as low detection accuracy and complicated laser method detection devices, and realize accurate detection of the left and right difference of the automobile wheelbase. And it has the advantages of convenient installation, unique design idea and high detection accuracy

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