主轴回转运动精度的计算机视觉测量系统

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。

An Accuracy Measurement System ofS pindle Radial Motion Based on Computer Vision

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 .