基于线激光扫描的工业焊缝外观检测系统

Appearance detection system of industrial welding seams based on liner laser scanning

文中针对表面带有鱼鳞纹的焊缝提出了工业焊缝外观检测算法:采用高维最小二乘法来拟合焊缝轮廓线,求取拟合轮廓线的二阶导数来确定焊趾范围;并基于拟合轮廓与实际轮廓间的位置偏差提取特征点,进而得到工业焊缝的形状参数.基于上述算法,开发和调试工业焊缝检测的软硬件系统.试结果表明,针对表面有鱼鳞纹的焊缝该算法可以稳定、准确、快速的进行检测.工业应用表明,该系统可稳定实现焊缝轮廓数据的快速采集.通过该系统实现对采样数据的处理计算,最后得到准确的检测结果.

This paper proposed an industrial weld shape detection algorithm for the weld with fish-scale pattern on the surface. A high-dimensional least-square method was used for fitting the weld contour line. The second-derivative of the fitting contour line was calculated to determine the scope of weld toe.Based on the position deviation between fitting and actual contours,the feature points were extracted to obtain the shape parameters of industrial weld. Based on the above algorithm,the hardware and software systems for industrial weld detection were developed and debugged. The test shows that this system is rapid and stable to achieve the acquisition of weld profile data. The accurate results can be obtained through the system to realize the calculation of sampling data.