Data Collection And Communication For Online Signature Based On Usb Interface Technology

In modern information society, electronic business that based on the open network called Internet is becoming more and more popular. Nowadays the development of network information makes the information security of individual status to become a key question. Identity verification is a problem which information security faces. The biometric identification has obtained more widespread application because it has some advantages compared with traditional identity verification, such as the security is good, easy to carry, not easy to get lost and forgotten and so on. On-line signature identification is the technology based on biometrics technology, through computer to compare the image, strokes, speed and pressure of handwritten signature with the true style to distinguish the signature in real-timeThe key point of this paper is the software design and hardware design for on-line signature data acquisition system based on four-line resistance touch panel. The hardware of acquisition system mainly includes data acquisition module, show module, USB communication module and control module. The working principle is through touch panel to collect handwriting information with the frequency 200Hz, and transmit handwriting information to MCU in real-time. MCU processes data simply and transmits data to the show module to make the handwriting display for reference by the person. The people can refer it. This will be followed by data transmission using USB interface in the PC for displaying and preservation. On the basis of the overall circuit introduction, this paper also introduces the four-line resistance touch panel and the control method of touch panel controller ADS7846, the working principle of LCD controller SED1335 and USB controller PDIUSBDI2. The software design of acquisition system mainly includes fireware program and PC program. PC program includes dll, driver program and apply program。The experimental results show that the system has high acquisition precision, stability and high anti-interference capability, it can provide stable and reliable data for matching of signature identification and data transmission.