直线度误差评定的测量提取点数选择

在其他测量实验条件相同的情况下,采用不同的提取点数,用三坐标测量机对相同直线的部分测量点坐标进行等间距提取,并用最小二乘法评定相同直线不同提取点数下的直线度误差.分析提取点数与直线度误差的关系,提出最佳提取点数的概念,指出直线度误差检测相关标准中必须补充提取点数的要求.

Study on the Number of Extraction Points for Evaluation of Straightness Error

Under same measurement conditions,some point sets were extracted from the linear part of a same part with different number of extraction points on the coordinate measuring machine the straightness error of the measured point sets was computed by the least square method;the relationship between the number of extraction points and the straightness error was analysed;the concept of optimal number of extraction points was put forward,and it is pointed out that the requirements for extraction number must be adde...