小半圆直径的高精度测量方法及其应用  

High Precision Measuring Method of Smaller Semicircle Diameter and Its Application

作　　者：许连虎[1] 袁怡宝[2] 朴伟英[2] 

机构地区：[1]哈尔滨工业大学自动化测试与控制系 [2]哈尔滨工业大学

出　　处：《工具技术》2011年第7期87-91,共5页Tool Engineering

摘　　要：在对弓高弦长法进行深入研究的基础上,推导出当弓高或弦长在微小范围内变化时,小半圆直径(或半径)的测量方程是有关弓高变化量或弦长变化量的线性方程。该测量方程充分表明,弓高变化量或弦长变化量的放大系数是与角度有关的"灵敏系数",从而指明了提高测量精度的方向;并给出了灵敏系数是特殊值的几个测量点。用本方法测量小半圆的直径(或半径)时,无需计算装置和复杂的计算过程,所见即所得,快捷简便,测量精度高。Based on researching into the traditional measuring method of arc height and chord length, it was deduced that when arc height or chord length change in a small range, the measurement equations of smaller semicircle diameter （or radius） are linear equations associated with the variation of arc height or chord length. This measurement equations fully demonstrate that the amplify coefficients for the variation of arc height or chord length are sensitivity coefficients associated with angles, which indicate the direction to improve measurement accuracy, and several special coefficients were discussed. The measurements of the smaller semicircle diameters （or radius） do not require calculating devices or complex calculating processes with the said method, and the measurement results are what you see is what you get. The specialty of the method is fast, convenient and high precision.

关 键 词：小半圆 直径 测量 弓高 弦长 灵敏系数 

分 类 号：TG806[金属学及工艺—公差测量技术] TP2[自动化与计算机技术—检测技术与自动化装置]