基于CMOS图像匹配的非接触测量系统  

Concentric Circles' Measurement by CMOS Image Matching Sensor

作　　者：张宏伟[1] 

机构地区：[1]广东技术师范学院天河学院电气工程系

出　　处：《自动化与信息工程》2014年第6期27-31,共5页Automation & Information Engineering

摘　　要：采用CMOS图像匹配传感器实现对圆形工件几何尺寸(同心度)的非接触测量。选用OV7670、FPGA、TFT和触摸屏组建系统。选用三点定圆法和数像素点法的测量原理,编程实现数字图像处理算法和圆匹配。对实物进行匹配测量并分析误差,通过增加迭代次数减少误差,增加图像的细化程度来提高测量精度。The geometry size of circular work piece（concentricity） can be measured by non-contacted matching CMOS image sensor.The OV7670,FPGA,TFT and touch screen are consisted of the main hardware part of the system.The three-points fixed circle method and pixels law are used as measuring,the digital image processing algorithm and circle matching are achieved by program.The system is calibrated to match the physical measurement.The errors are analyzed.The errors could be reduced by increasing the number of iterations,and the accuracy could be improved by increasing the level of measurement details.

关 键 词：CMOS 图像匹配 数字图像处理 FPGA 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]