关键词: 线轮廓度, 最小条件, 误差评定, 虚拟测量

Abstract: A measuring method of simulating actual measuring tool processes was proposed to evaluate the line profile errors. The method followed the least condition principle of shape tolerances in the national standard. The position relationship between the measuring points and the corresponding envelope boundary was analyzed， the set of measurement points was regarded as a rigid body. The relative motions were calculated between the rigid body and the boundary which might occur in the processes of the boundary shrinking to the minimum region， and finally all the measured points were located in the minimum containment region. The results show that evaluation processes are more global and directivity than  that of the large-scale search of common optimization algorithm， which may effectively avoid the local solutions of the search results caused by the algorithm defects. The proposed method is suitable for the error evaluation of line profiles.

Key words: line profile, least condition principle, error evaluation, virtual measurement