坐标测量机测头系统误差检测中的布点优化与实现  

Optimization and Implementation of Points Distribution in Error Test of CMM Probing System

作　　者：刘璐[1] 潘云龙[1] 扎庆庆[1] 雷莹[1] 

机构地区：[1]合肥工业大学仪器科学与光电工程学院,安徽合肥230009

出　　处：《计测技术》2013年第1期34-37,共4页Metrology & Measurement Technology

摘　　要：测头系统的精度对坐标测量机整机的精度非常重要。根据ISO 10360-2的规定,需要在标准球上尽量均匀采集25个点,计算全部25个点的径向偏差范围,以此来衡量测头系统的误差。本文给出了测头系统检测策略的一种更为准确的实现方法,证明了25个点在标准球面上不能均匀分布,阐述了一种半球面上准均匀分布25个点的方法,给出了测量程序中的一个关键参数———安全高度的简单计算方法,并给出了一种测量点三维误差的可视化方法,为测头系统的误差分析提供方便。The precision of a probing system is vitally important to coordinate measuring machines.According to ISO 10360-2,data of 25 points distributed as evenly as possible should be collected on a reference sphere,and the radial error of each point is calculated to evaluate the error of the probing system.A more accurate implementation is presented in this paper for the test strategy of the probing system.It is proved that 25 points can not be distributed evenly on the reference sphere,and a method is presented for distributing 25 points quasi-evenly on the hemisphere.A simple approach is introduced to compute the clearance distance in the measurement program.A visualization method for the three-dimension error of the measured points is given to facilitate the error analysis of the probing system.

关 键 词：坐标测量机 测头 误差检测 

分 类 号：TB921[一般工业技术—计量学]