射频卡和指纹识别技术在数字校园系统中的应用研究

【作者】 彭曙蓉；

【导师】 彭楚武；

【作者基本信息】 湖南大学 ， 控制理论与控制工程， 2003， 硕士

【摘要】 随着现代电子集成技术的飞速发展，智能卡技术与指纹识别技术日益成熟，广泛应用于管理智能化领域。 本文首先介绍了数字校园与一卡通系统概念，分析了两者的关系及射频卡和指纹信息在数字校园中的应用。接下来详细讨论了射频卡工作原理及其读写设备核心技术，设计了一种高性能的射频卡读写器，采用PSAM卡进行密钥管理，提高了系统的安全性。 本文对指纹识别的原理和方法作了较深入的研究，针对常规指纹识别算法的指纹图像易受旋转和平移的影响、细节特征点提取步骤繁琐、比对速度较慢的现状，提出了一种基于纹线方向信息的自动指纹识别算法，实践表明，与常规方法相比，该算法较大幅度地提高了特征提取的速度，具有高度的图像旋转、平移不变性，匹配速度较快，对面积适中的指纹图像，匹配结果基本可以满足在线应用的需要。该算法有望发展成为一种实用、有效的指纹匹配技术。 文章最后设计了一个以校园网为基础、以射频卡为载体、以指纹识别技术为身份认证手段的校园一卡通系统。该系统采用银校合作发卡的方式，一张射频卡集学生证(工作证)、借书证、准考证、消费卡、银行卡等功能于一体，实现真正意义的“一卡通”。系统利用圈存子系统实现电子存折与电子钱包之间的转帐。针对终端设备的串口特性，采用串口服务器完成TCP／IP到串口通信的协议转换，实现终端数据的网络传送，充分体现了系统的高性能、高度信息化、高度智能化的优势。该系统已在某大学的三个校区投入使用，系统运行稳定、射频卡读写机具和指纹识别机具运行可靠、工作效率高，网络数据传输准确无误，得到用户的肯定，表明了本文所研究与开发的成果的有效性和实用性。更多还原

【Abstract】 With the development of modem electron integrating technology, the RF Card and fingerprint recognition technologies have become mature and have been used in the field of intelligent management.First, the concepts and relationship of "digital campus" and "Card System" are introduced in this paper. The application of RF Card and Fingerprint Recognition technologies in Digital Campus System are analyzed. As follows this paper discussed the working principle of RF Card, the kernel technology of RF Card Reader. A RF Card Reader with high capability is designed by using PSAM Card to manage cryptogram to improve security of the system.The principle and method of fingerprint recognition are studied deeply in this paper. Because in the routine fingerprint identification algorithms the fingerprint images are easily affected by rotation and motion, the way of minutiae extraction is trivial and the matching speed is slow, a new algorithms based on information of lines’ direction is presented .The algorithm is proved accurate, quick, and invariable to translation and rotation of images in practice. According to fingerprint images of moderate sizes, the needs of online application can be met. The algorithm is expected to be a convenient and effective fingerprint matching technique.As conclusion, this paper designed a Campus Card System based on campus network with RF card as medium and fingerprint recognition technology as the way of person’s identification. A school and a bank put out the cards with multi-function together. A special sub-system is used to convert the fund between ED and EP. Aiming for the peculiarity of serial port, Serial Sever is used to translate the TCP/IP to serial port communicating protocol. So the terminals can be connected to Ethernet. This system shows high capability, information technology, intelligence and stability. Now it has been used in a university . It works stably, the RF Readers and the APISwork credibly and efficiently as while as data are transmitted correctly by network. So it is well-thought-of users. Also it is indicated that the result in this paper is virtual and applied.更多还原