焊缝表面缺陷激光扫描三维重构测量

3D reconstruction of laser scanning at weld surface defects

关键词:  激光测距|焊缝缺陷|三角剖分|三维重构

Key words:  laser ranging|weld defect|triangulation|3D reconstruction

摘要:

为检测工件焊缝表面缺陷，采用点激光位移传感测距法和数据拟合技术进行焊缝表面缺陷检测试验研究. 首先采集缺陷表面轮廓数据点，利用高斯滤波对原始数据降噪处理. 再对处理后的数据点进行Delaunay三角剖分，使散乱点连接并结合其空间坐标重构出缺陷的三维模型. 结果表明，基于点激光位移传感测距技术及焊缝表面缺陷三维重构方法可以准确判断焊缝成形情况.

Abstract:

The surface defects of the workpiece weld bead were detected suing a point laser displacement sensing method. Firstly, the data of weld defect surface was collected and the original data was filtered by Gaussian filtering. Then the Delaunay triangulation was applied for the processed data points and reconstruction of a three-dimensional model with the spatial coordinates. Experimental results showed that the 3D reconstruction method based on the point laser displacement sensing and the surface defect images of the weld bead can accurately judge the appearance of welds.