主轴回转运动精度的计算机视觉测量系统  

An Accuracy Measurement System of Spindle Radial Motion Based on Computer Vision

作　　者：关芳芳[1,2] 程筱胜[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016 [2]南京工程学院工业中心,江苏南京211167

出　　处：《机械设计与制造工程》2014年第8期50-53,共4页Machine Design and Manufacturing Engineering

基　　金：江苏省自然科学基金资助项目(BK20130793);南京工程学院科研基金资助项目(QKJB2011026)

摘　　要：基于计算机视觉测量技术,建立了机床主轴回转运动精度测量系统。系统主要由CCD摄像机、计算机和相应的图像处理软件组成。利用图像传感器记录靶标特征点运动轨迹,经过图像处理软件的数据处理,可直接测得主轴的回转运动。由于靶标特征点的提取直接影响系统的测量精度,因此提出了以圆形标记作为靶标图案,采用面积矩方法提取圆心来提高系统测量精度。在MATLAB环境下编程实现图像处理和数据计算,采用最小区域圆法计算主轴回转误差。最后采用该系统对车床主轴进行了测量,试验证明,系统可以实现主轴回转运动精度的精确、快速测量,且精度达到微米级。It introduces a system for measuring spindle rotary motion accuracy based on computer vision technolo-gy .The system is made up of image sensor , computer and image processing software .Trajectory of target feature point is recorded by the CCD image sensor , and spindle rotary motion is measured directly , avoiding the tradi-tional approach to obtain rotational error by error separation .Target feature points extracted affect directly the measurement accuracy of the system , so it designs a target round mark and a more accurate method to extract the center area in order to improve system accuracy .In the MATLAB programming environment , it calculates the er-ror of spindle rotation using the minimum zone circle method .Tests show that the system can measure the spindle rotary motion error rapidly and accurately , and the precision can reach micron level .

关 键 词：主轴回转运动精度 计算机视觉 数字图像处理 最小区域圆法 

分 类 号：TH741[机械工程—光学工程]