一种适合多协议防碰撞的射频识别阅读器设计

针对目前市场上射频识别阅读器只能识别单协议标签的情况,设计了一种能够识别ISO/IEC15693和ISO/IEC14443-3 TYPE A两种协议标签的射频识别阅读器。采用TI公司的13.56MHz频段下的芯片S6700作为射频模块,现场可编程逻辑器件作为控制器,和单片机相比,减少了外围电路。同时针对同时读取多标签的情况,提出了一种改进的动态二进制防碰撞算法,用计数器保存标签的休眠程度,理论分析和仿真结果表明其性能优于动态二进制算法。

Design of a multi-protocol and anti-collision RFID reader

As now many RFID readers in the market can only identify tags applying for a single protocol, a design scheme of a multi -protocol RFID reader is put forward in order to identify tags tallied with protocol ISO/IEC15693 and ISO/IEC14443 -3 TYPE A. A TI S6700 chip is used as a radio frequency transceiver working on the frequency of 13.56 MHz. FPGA is used as controller, compared with single-chip microcomputer, it needs less suburbs circuits. In view of reading many tags,an improved dynamic binary anti -collision algorithm is provided.It uses a counter to store the dormancy degree.Both theoretic results and simulation performance show that this algorithm outperforms the dynamic binary algorithm.