Identification of Feature Points of Small Gap Butt Welding of Thin Plate
Aiming at the problem of detection of weld feature points in small gap butt welding of thin plate,a Shi-Tomasi corner detection algorithm based on Labview was applied.According to the line laser irradiation on the weld surf ace,discontinuous laser stripes were formed.Image preprocessing and image morphology transformation were used to obtain the weld image which was convenient for detection of weld corner points.Then Shi-Tomasi corner detection method is used to detect the corner points of the weld image,so as to determine the position of the characteristic points of the weld.The program of weld feature points identifica-tion was programmed by Labview,and the identification and detection of feature points were carried out on the aluminum alloy sheet with the thickness of 2mm and the weld gap of0.3mm,0.4mm,0.5mm and 0.6mm respectively.The error range was less than 0.15mm.The results show that the Shi-Tomasi corner detection algorithm can extract the position of the weld feature points more quickly and accurately than the traditional corner detection algorithm.
Small Gaps in Thin PlatesButt WeldLabviewFeature PointsShi-Tomasi Corner Detection
万方数据
维普
