基于图像识别的印制电路板精密检测实验研究

Experimental Research on Precision Measurement of PCB Based on Image Recognition

基于图像识别的印制电路板测试系统,由CCD摄像机、调焦镜头、图像采集卡、水平工作台、计算机以及电气控制等部分组成。系统根据测量目标放大倍数、检测精度,调节光学镜头焦距和与水平工作台的工作距离。在工作距离和镜头焦距一定的情况下,通过缩小测量目标的视野及电气控制部分,调节工作台的X轴和Y轴以达到目标任意局部位置的测量。

The measurement system for PCB based on image recognition is composed of CCD camera, fitting lens, image acquisition card, horizontal workstation, PC and electric control. The system adjust focus of optical lens and working distance of horizontal workstation, according to enlargement factor and measurement precision of measurement object. In condition of the fixed distance of working distance and lens＇ focus, measurement of any part of PCB can be realized by adjusting X axis and Y axis of workstation.