坐标测量机动态测量不确定度评定研究  

Study on dynamic measurement uncertainty evaluation for CMMs

作　　者：马修水[1] 费业泰[2] 李光[1,3] 张梅[3] 李贤义[1] 

机构地区：[1]浙江大学宁波理工学院,宁波315100 [2]合肥工业大学,合肥230009 [3]安徽大学,合肥230039

出　　处：《仪器仪表学报》2008年第10期2146-2149,共4页Chinese Journal of Scientific Instrument

基　　金：安徽省重点实验室基金(2005008)资助项目

摘　　要：目前人们对三坐标测量机动态测量不确定度仍采用静态测量理论来评定,与其实际使用情况不符,带来一定的评定误差,本文分析了触发模式下三坐标测量机测头的主要动态误差源,通过改变测量速度和逼近距离对测头(Renishaw MH20i)动态误差的影响进行了实验测试,采用Monte Carlo方法对三坐标测量机测头动态测量不确定度进行评定,与使用传统的测量不确定度A类和B类评定结果相比较,本方法不受直接测量量相关性的限制,受问题条件限制,评定更符合实际情况。So far dynamic measurement uncertainty evaluation of CMMs is quite limited and the available uncertainty evaluation method based on static measurement theory is not suitable for CMMs used in real measurement environment and has evaluation error. This paper analyzes the main dynamic error source of CMM probe in the trigger mode, carries out experiment test of the influence of probe （ Renishaw MH20i） dynamic error through changing the measurement speed and approximate distance. Monte Carlo method is used to evaluate the dynamic measurement uncertainty. Compared with the result of the type A and type B uncertainty evaluation in static measurement theory, this method is not affected by the direct measurement quantity relativity, has little condition limit ; and the result is more suitable for CMMs used in real measurement environment.

关 键 词：CMM MONTE Carlo 测头 动态测量 不确定度 

分 类 号：TH721[机械工程—仪器科学与技术] U260.5[机械工程—精密仪器及机械]