采用层扫描的方式, 实现了管材的激光渐近弯曲矫形。基于Perona-Malik边缘提取算法和RANSAC直线特征提取算法, 实现了激光渐近弯曲矫形过程的实时在线测量, 分析了工艺参数对管材弯曲角度的影响。结果表明, 弯曲角度随时间的增加呈近似线性增加; 位置形状参数对弯曲角度的增大速率影响不大, 而轴向进给次数与单层弯曲角度的变化量成正比; 轴向进给步距可以改变弯曲段的曲率; 激光平均功率越高, 弯曲角度的增大速率越快。

The laser tube asymptotic bending correction is realized by the layer scanning. Based on the Perona-Malik edge extraction algorithm and the RANSAC linear feature extraction algorithm, the real-time online measurement of the laser asymptotic bending correction process is realized. The influences of process parameters on the pipe bending angles are analyzed. The results show that the bending angle nearly increases with time linearly. The position and shape parameters have little effect on the increasing rate of bending angles, while the axial feeding times are directly proportional to the variation of the single-layer bending angle. The curvature of the bending section can be changed by the axial feeding step length. The higher the average laser power, the faster the increasing rate of bending angles.