The effect of hybrid welding parameters on welding bead geometric dimensions has always been the focus of laser-arc hybrid welding research, so it’s inevitable to measure the dimensions of welding bead. The paper presents a new measuring system of welding bead sectional dimensions in polar coordinate system. First we can get the outline of the welding bead shape with the SOBEL edge detection algorithm . Secondly locate the center point of welding bead and make it as the original point of the polar coordinate system. Calculate the coordinates of pixels in the welding bead shape outline every other 15 degrees . According to the coordinates gainedand plotting scale, we can calculate the sectional geometric dimensions of welding bead. Comparing the dimensions measured in this paper with those measured manually, we can conclude that the measuring error can be under 3%. The research shows that the measuring methods presented in this paper can dramatically improve the efficiency to measure the dimensions and can also solve the problem that the dimensions of welding bead can notbe measured in polar coordinate system with traditional method. In conclusion this automatic measuring system has a profound meaning to the hybrid welding research.
关键词
激光-电弧复合焊焊缝截面边缘检测算法极坐标系形貌像素长度
Keywords
laser-arc hybrid weldingwld coss sctionSOBEL edge detection algorithmthe sectional outline of welding beadcoordinates of pixels
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