关键词: 坐标测量机, 端面距离测量, 蒙特卡罗模拟, 不确定度评定

Abstract:

A complete uncertainty evaluation process of end distance measurement by CMM was presented.To begin with,the major sources of uncertainty,which would influence measurement results,were found out after analyzing,then, a general mathematic model of end distance measurement was established.Furthermore,Monte Carlo method(MCM) was used,and the uncertainty of the measured quantity was obtained.The complete results were given out,so the application value of CMM was enhanced.Moreover,seen from the evaluation example,the results of uncertainty evaluation obtained from MCM method and from the method provided by Guide to the Expression of Uncertainty in Measurement(GUM) method were compared,the comparison result indicates that the mathematic model is feasible,and MCM method to evaluate uncertainty is easy and efficient.

Key words: coordinate measuring machine(CMM), end distance measurement, Monte Carlo simulation, uncertainty evaluation