基于嵌入式技术的大容量射频识别系统设计与实现

Design and implementation of large capacity radio frequency identification system based on embedded technology

针对航空读卡器存在便携性差、速度慢和标签存储容量小等问题,提出了一种基于STM32的大容量射频识别(RFID)系统设计方法。以高性能的STM32嵌入式微处理器为核心,采用新型的CR95HF射频芯片,设计了一款工作在高频(HF)频段并支持ISO 15693、ISO 18092等多种协议的新型手持式RFID读卡器,详细阐述了系统的电源、天线设计和软件的速率、误码优化。同时,设计了一款与之匹配的被动式大容量电子标签,其存储容量高达32 KB,与读卡器构成大容量RFID系统。实验结果表明,与传统读卡器相比,该读卡器的读写速度提升2.2倍,误码率降低91.7%,标签容量提升255倍,为航空物流领域的快速、准确和大数据需求提供了更好的选择。

Aiming at the problems of current aviation card readers, include poor portability, slow speed and tags＇ little capacity, a design method of large capacity Radio Frequency Identification （RFID） system based on STM32 was proposed. Using STM32 microprocessor as a core and adopting CR95HF radio chip, a new handled RFID card reader which worked in High Frequency （HF） and supported ISO 15693, ISO 18092 protocols was designed. The design of power, antenna and optimization of software speed, error rate was discussed in detail. A new large compiled capacity passive tag was also designed whose capacity is up to 32KB to form a large capacity RFID system with card reader. The experimental results show that, compared with the traditional card reader, the reading and writing speed of the card reader increases by 2.2 times, error rate reduces by 91.7% and tag capacity increases 255 times. It provides a better choice for fast, accurate and high data requirements of aviation logistics.