【摘要】 通用串行总线(USB)接口由于使用方便、传输速度快、稳定性高等优点而被广泛应用于各种设备中。在线动态签名认证由于其安全性和方便性,尤其适用于银行金融系统以及个人身份识别等,作为在线签名认证的基础——笔迹的数据采集,对后续认证的准确性显得尤为重要。文中着重介绍了触摸屏的工作原理以及如何利用AT89S51、触摸屏、触摸屏控制器ADS7846和USB接口芯片CY68001,来实现对在线笔迹包括压力在内的三维数据采集。更多还原

【Abstract】 USB interface has been widely used in many kinds of equipments because of its convenient using, rapidly transmission, high stability and so on. Now more and more online signature verification is used in various areas too, especially for finance system of bank and personal identification. So the base of online signature verification——data collection of handwriting is very important for followed verification’s accuracy. This paper mainly introduces the working theory of the touch screen and how to use AT89S51, touch screen and touch panel controller ADS7846 and USB interface chip CY68001 to collect three dimensional data of handwriting including stress information.更多还原