摘要
复杂曲面零件的几何模型重构是反求工程的研究重点之一。针对螺旋零件表面的数字化数据提取边界线的问题,提出了一种基于层析数据的螺旋扫描件边界特征线提取方法。该方法分两步进行,首先将点云切片,对切片后每一层数据点进行边界特征点提取和轮廓线拟合;其次将相邻层边界点拟合得到边界线。通过实例验证,结果表明该方法具有较强的可操作性和实用性。
One of the key research issues in reverse engineering is about the geometric modeling restruction of parts with complex surfaces.In order to solve the problem that how to extract the boundary from point clouds,the boundary extraction method in reverse engineering based on slicing data of spiral scanning parts is investigated.The boundary extraction process consists of two major steps;at first,doing layer contour feature point extraction and fitting cross section outlines using adjacent layer feature points after slicing the point clouds.Then,the trajectory can be fitted though the adjacent layer boundary points.This method is proven to be operability and practicability though one typical spiral scanning part.
出处
《科学技术与工程》
2011年第17期3937-3940,3954,共5页
Science Technology and Engineering
关键词
反求工程
层析数据
边界提取
特征点
reverse engineering
slicing data
boundary extraction
feature point
