基于USB传输及CMOS图像传感器的指纹识别仪的实现  

Implementation of fingerprint recognition instrument based on USB transfer and CMOS image sensor

作　　者：严家喜[1] 李昂[1] 史延东[1] 

机构地区：[1]西北工业大学自动化学院,陕西西安710072

出　　处：《光学仪器》2005年第1期37-41,共5页Optical Instruments

摘　　要：介绍了基于CMOS图像传感器OV7620和EZ—USBAN2131QCUSB数据传输的指纹识别仪硬件实现,为匹配时序使用了CPLD技术实现了高速缓冲区,并重点对USB批量快速传输和CPLD缓冲控制的实现进行了讨论。由此方法实现的指纹识别系统反应灵敏,稳定可靠。Hardware circuit design of the fingerprint instrument based on CMOS image sensor OV7620 and EZ—USB AN2131QC USB data transfer are introduced. To meet the timing requirement, high speed buffer is implemented by use CPLD. How to realize USB bulk transfer and high speed buffer is discussed in detail in the paper.The instrument implemented with methods above is sensitive and steady.

关 键 词：CMOS图像传感器 指纹识别仪 OV7620 AN2131QC CPLD 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]