基于外包络点的最小外接圆误差快速评定方法  

A Fast Minimum Circumscribed Circle Error Evaluation Method Based on Outer Enveloping Points

作　　者：干江红 汪洁[2] 许美红 GAN Jiang-hong;WANG Jie;XU Mei-hong(Wuhan Railway Vocational College of Technology,Wuhan,Hubei 430205,China;School of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China;Hubei Wuhan Yongjia Patent Agency Co.,LTD,Wuhan,Hubei 430070,China)

机构地区：[1]武汉铁路职业技术学院,湖北武汉430205 [2]华中科技大学机械科学与工程学院,湖北武汉430074 [3]湖北永嘉专利代理技术有限公司,湖北武汉430070

出　　处：《计量学报》2023年第5期687-693,共7页Acta Metrologica Sinica

基　　金：国家“863”计划(20171183)。

摘　　要：对大尺寸轴类零件的高精密圆度测量时会生成大样本测量点集,而基于大样本点集的快速最小外接圆(MCC)误差评估已成为急需解决的工程问题。圆度测量产生的点集一般为有序评估点集,其最小外接圆可由该点集的外包络点确定。为提高最小外接圆计算效率,先利用包络向量搜寻外包络点,再进一步将外包络点压缩至常数范围,进而基于压缩后的外包络点快速求取最小外接圆及误差。分别利用文献数据、仿真数据和实测数据验证基于外包络点的最小外接圆误差快速评定方法的通用性、高效性和实用性。基于外包络点的最小外接圆误差快速评定方法具有实现简单、评定速度快的特点,可用于改进现有圆度仪的最小外接圆计算方法。The high-precision roundness measurement of large-scale shaft parts will generate a large sample measurement point set,the rapid minimum circumscribed circle(MCC)error evaluation based on the large sample point set has become an urgent engineering problem to be solved.The MCC can be determined by the outer enveloping points of the ordered points set.An enveloping vector model of the ordered point set was established to find the outer enveloping points,and the outer enveloping points were compressed to a constant number.The MCC would be obtained in a short time based on the compressed outer enveloping points.Meanwhile,the generality,efficiency and practicability of the proposed method were verified by the literature data,the simulation data and measured data respectively.The fast MCC error evaluation method based on outer enveloping points is simple and high efficient,which is suitable to improve the MCC calculating algorithm of present roundness tester.

关 键 词：计量学 外包络点 最小外接圆 包络向量 圆度 轴孔类零件 大样本点集 误差评定 

分 类 号：TB92[一般工业技术—计量学]