Bolt Loosening Angle Measurement Technology Based on Computer Vision
In order to improve the detection efficiency of bolt connections and make full use of the efficiency and convenience of computer vision,a method for measuring bolt loosening angle based on computer vision is proposed,which includes four steps:image acquisition,image preprocessing,edge detection and line recognition,and angle calculation.Firstly,the bolt image is acquired,the image is preprocessed with perspective transformation and image grayscale.Then,the edge is detected by Canny edge detection algorithm and straight line is recognized by Hough transform.Finally,the bolt angle is calculated.A bolt model is designed to verify the feasibility of the method,and the experimental results show that the method can efficiently and accurately recognize the bolt looseness above 5°,with a maximum error of only 5％,which meets the accuracy requirements of actual engineering and has good application prospects.
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