光笔式视觉检测系统的二次曲面拟合研究

光笔式视觉检测系统以其操作简单,便携性强,测量精度高,测量范围可扩展等优点,在先进制造工业中有着很好的应用。研究了如何将测量数据转换为二次曲面的非线性拟合问题,提出了一种二次曲面非线性拟合初值估计方法,并借助于＂忠实距离＂的概念,实现了二次曲面参数的非线性最小二乘求取。初值估计方法仅依赖于测量点的法向量,简单可行。通过拟合结果和真实参数进行对比与分析,验证了文中所述系统和算法的可行性。

Research on Quadratic Surface Fitting for Light-pen Visual Detection System

The composition and measuring procedure of the light-pen visual detection system is presented.In industry area,measurement data must be convert to surface,quadratic surface is often the situation.This paper proposes a normal based initial parameter estimate algorithm,and by means of the concept of Faithful-Distance and Non-linear Least Square approach,the geometric parameters of object that is recovered.Experiments based on real object data verify the feasibility of the light-pen visual detection system.