摘要
复杂曲面零件的几何模型重构是逆向工程的研究重点之一,由零件表面的数字化数据提取边界线是构造几何模型的重要步骤。针对由CMM获取的三维数据“点云”,提出了经纬线扫描算法自动提取单值曲面边界线,提出了基于局部增量网格扩张的三维散乱数据三角剖分算法,实现了任意非封闭曲面边界线的自动提取。实践证明,通过该算法得到的复杂曲面的边界线能够满足模型重建的工程需求。
One of the key research issues in Reverse Engineering is the geometric modeling of complex surface. Its important step was boundary extraction of part surface from ＂points cloud＂ . A method of warp and weft scanning was proposed to automatically extract the boundary of single value surface. The direct triangulation algorithm based on the local incremental mesh generation was presented to extract the boundary of arbitrary non - occlusion surface. The examples prove that the methods can satisfy the engineering need of model reconstruction.
出处
《机床与液压》
北大核心
2006年第7期50-51,76,共3页
Machine Tool & Hydraulics
基金
国家总装备部"十五"预研资助项目(41318.1.1.7)
江苏省自然科学基金项目(BK2003095)
关键词
逆向工程
几何模型
边界线
三角剖分
Reverse Engineering
Geometric model
Boundary
Triangulation
