逆向工程中的三维光学检测点云采样技术研究  

Point cloud simplification technology of 3D optical measurement applied on reverse engineering

作　　者：张德海[1] 崔国英[2] 白代萍[1] 李艳芹[1] 张晓强[3] 杨勇[1] 

机构地区：[1]郑州轻工业学院机电工程学院,郑州450002 [2]鹤壁职业技术学院,河南鹤壁458030 [3]西安交通大学机械工程学院,西安710049

出　　处：《计算机应用研究》2014年第3期946-948,共3页Application Research of Computers

基　　金：国家自然科学基金资助项目(21206152);河南省基础与前沿技术研究项目(132300410181);河南省教育厅科学技术研究重点项目指导计划项目(13B460333);河南省教育厅科学技术研究重点项目科技攻关计划项目(13A460372);郑州市科技攻关项目(131PPTGG411-7);郑州轻工业学院校一般项目科研基金项目(2012XJJ012);郑州轻工业学院博士科研基金资助项目

摘　　要：针对大型复杂曲面产品三维光学检测技术在逆向工程中存在获取点云数据密度大、冗余点繁多、处理任务繁重等问题,对光学检测获得的海量点云预处理技术和工作流程进行了研究,提出了点云采样时的最终判据Δ(S,S')。该判据在满足高精度、快速度、适简度的原则下以达到给定的最大允许误差或者指定点的数目为目标,适用于重建几何精度要求较高的场合。以某大型水轮机叶片为例进行了采样和逆向建模精度分析,证明了三维光学检测点云采样技术的正确性和可行性。Facing the problems such as bigger dense point eloud data, much various of redundancy points and heavy proces- sing tasks in view of 3D optical measurement technology applied in reverse engineering of larger complex surface product. This paper studied the preproeessing technology of amounts of point cloud on optical measurement, and analyzed the preprocessing technology workflow. It proposed a final point cloud simplification criterion A （S, S＇）. It set the criterion to the goal of the maximum permissible error or the number of specify points under the condition of meeting the higher precision, faster speed and brief simplified principle. It was applicable to higher geometric rebuild precision condition. Finally, it looked a large hy- draulic turbine blade as an example to simplify and conduct accuracy analysis in reverse design. It proved the validity and fea- sibility of 3D optical measurement point cloud simplification technology.

关 键 词：逆向工程 光学检测 点云采样 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论] TP391[自动化与计算机技术—计算机科学与技术]