移动最小二乘投影法在点云变形分析中的应用  

Application of moving least squares projection method on point cloud deformation analysis

作　　者：吕志鹏[1] 伍吉仓[1] 

机构地区：[1]同济大学测绘与地理信息学院,上海200092

出　　处：《辽宁工程技术大学学报（自然科学版）》2016年第12期1495-1499,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：国家重点基础研究发展计划项目(2013CB733304);国家国际科技合作专项项目(2010DFB20190);国家自然科学基金项目(41074019)

摘　　要：为更加全面的描述简支梁加载变形情况,采用不锈钢扁管加载实验模拟简支梁加载过程,利用三维激光扫描仪获取不锈钢扁管变形前后的点云数据,并假设变形沿着变形后曲面法线方向发生,将变形前的点云数据利用移动最小二乘投影法投影到变形后的曲面上获得变形数据.同时,利用TS30高精度测量机器人设置对比实验.研究结果表明:提出的点云变形分析方法的精度与TS30相当能够探测毫米级变形.For more comprehensive description of the deformation of simply supported beam loading, this paper carried out flat tube loading tests to simulate it and obtained the point clouds before and after deformation with three-dimensional laser scanner. Assuming that the deformation occurs along normal direction of deformed surface, point cloud before deformation is projected along deformed surface with moving least squares projection method to extract deformation information. Meanwhile, this paper set comparative experiment with high-precision measurement robot TS30. The experimental results show that the analysis accuracy of above-mentioned method is quite capable of detecting mm level deformation in same level with TS30.

关 键 词：三维激光扫描仪 移动最小二乘投影法 变形分析 点云 TS30 

分 类 号：P225.2[天文地球—大地测量学与测量工程] TU196.1[天文地球—测绘科学与技术]