锻压技术

逆向工程曲面重建及实验应用研究

英文标题：Research on experimental application and surface reconstruction in reverse engineering

作者：张德海刘春玲李艳芹谢贵重刘建秀

关键词：逆向工程曲面重建点云分割 Geomagic

分类号：TP391;TG806

出版年,卷(期):页码：2016,41(6):115-121

摘要：

针对逆向工程前处理阶段获得的海量点云大数据存在运行速度慢、内存不足等问题，确立了点云分割的精确程度是影响最终数模精度和处理时间的关键因素；分析了点云处理的技术流程、三角Bezier曲面重构法和NURBS曲面造型法，研究了基于曲率的边界法识别技术和基于点云几何属性的特征区域自动分割方法以及平面分割技术；以某大型水轮机叶片和发动机皮带轮等为实验对象进行了三维光学扫描，采用Geomagic软件对获得的海量点云进行了处理和曲面重建操作，得出理想点云数模和真实数模的实际偏差率为96%，证明了采用的研究方法在逆向工程、质量检测及3D打印方面是切实可行的。

For the issue of slow speed and insufficient memory on numerous of large point cloud data in the pre-process of reverse engineering, the precision of point cloud segmentation was determined as the key factor influencing on final model simulation precision and processing time. Then, the technical process of point cloud processing, the triangular Bezier surface reconstruction method and NURBS surface modeling method were analyzed. A large hydraulic turbine blade and an engine belt wheel were scanned by 3D optical scanner based on identification technology of curvature boundary method, automatic region segmentation in the point cloud geometry property features and plane segmentation technology. Through Geomagic software, the numerous of point cloud obtained were processed and the surface reconstruction was carried out. Furthermore, the actual deviation rate between ideal point cloud data and real data is 96%, which shows that the method is feasible in reverse engineering, quality inspection and 3D printing.

基金项目：

基金项目:机械制造系统工程国家重点实验室（西安交通大学）开放基金资助项目（sklms2015012）；河南省重点科技攻关项目（142102110151）；河南省教育厅科学技术研究重点项目(13A460378)；郑州轻工业学院博士科研基金资助项目

作者简介：张德海（1973-），男，博士，副教授，高级工程师 E-mail：zhangdehai0318@163.com

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