注塑件产品的三维无接触全场检测

根据注塑件三维信息获取的特点,引入结构光三维扫描法和特征标志点拼接法,提出了一种在利用三维扫描系统中对注塑件进行快速无接触全场检测的方法。该方法通过结构光三维扫描系统获取物体各侧面的三维点云信息,并通过对特征点的提取,首先得到一组匹配点对,然后运用SVD矩阵分解算法求出转换参数,进而以此作为最近点迭代法的初始值,并对最近点的求法和迭代截止条件作了改进,得到了很好的配准效果,实现了对复杂尺寸注塑件的全场检测。论述了该方法的基本原理,并通过实例证明了该方法的有效性。

All-side 3-D scanning for plastic injection product

This article puts forward a rapid,untouched and all-side scanning method of plastic injection products in 3-D scanning system,by introducing the structural optical 3-D scanning method and feature flag point registration method according to the characteristics of 3-D information acquiring of plastic injection products.A matching point pair is obtained by the 3-D points cloud information of each lateral surface of objects acquired in the structural optical 3-D scanning system and the extracted feature points.Thus the transform parameters R and T are figured out by the SVD matrix decomposition algorithm and used as the initial value of the Iterative Closet Point algorithm.The Closet Point solution and the iterative cut-off condition are improved as well.The method achieves good matching efforts and realizes the whole-field scanning of plastic injection products of complicated size.This article discusses the fundamental principle of the method and proves its validity by examples.