Research of image collecting of automatic PCB visual inspection

Automatic PCB visual inspection had been developed for enhancing veracity and validity of PCB inspection.The image real time collecting and transfers of visual inspection was introduced,including hardware and software.The system design,detecting and WDM driver developing were discussed.CYCLONE FPGA of ALTERA Company was used to predigest local circuit logic,which greatly abbreviated the hardware developing period.Difficulty of driver development was reduced by using DriverStudio.The use of bridge chip PEX8111 and transmission mode of DMA meet the requirement of high speed,real time,and accurate image capturing.