PCB探针定位的条码视频辅助引导方法  

Video-Assist Positioning Method for PCB Fault Isolation Probing With Help of Barcode

作　　者：孙玉龙[1] 茅志兵[1] 

机构地区：[1]河海大学地球科学与工程学院,南京210098

出　　处：《计算机测量与控制》2013年第1期217-220,共4页Computer Measurement &Control

摘　　要：通过在PCB板上加贴多个QR码,在视频监控下,先由QR码动态解码定位,然后对故障隔离的目标定位,将PCB板、探针和高亮的目标点实时显示在视频上,引导探针进行故障隔离;讨论了不同解码结果下目标点可探测范围及对未解码的QR码进行预估的方法,利用帧相关算法实现在任意多QR码情況下对目标点的快速定位;结果显示对分辨率为2000×1600的PCB板影像图,对DIP标准封装引脚可达到实用定位分辨率,并在PC机上达到120ms/帧的解码定位速度。该方法可减少故障隔离时人工负担和出错机会。With Multiple QR codes affixed to the PCB board, under video surveillance, The PCB board, probes, the targets are displayed on the screen to guide the probing of fault isolation target in aid of decoding QR Code positioning. The approach to calculate detectable scope for target points and to predict the position of undecoded QR code are discussed. Through frame correlation algorithm, automatic location is developed for any number of QR Code on one PCB Board to improve decoding efficiency and precision. Practical location resolution is get for PCB board of standard DIP encapsulation component with 2000X1600 resolution image, 120 ms/frame decoding speed for PC computer. The technique will reduce the labor burden and mistaken fault isolation probing.

关 键 词：条码 PCB 定位 探针 故障隔离 自动测试程序 目标检测 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置]