一种基于125kHz的RFID智能锁设计

Design of a non-contact RFID smart lock based on 125kHz

针对低频射频识别(Radio frequency identification,RFID)智能锁的需求和现有智能锁存在的问题,提出了一种基于125kHz的RFID智能锁系统.该设计采用STM8s103F3单片机作为控制核心,使用AT24C02存储卡号信息.系统的主要特点为使用运算放大电路来读取电子标签上的信息,降低了成本、提高了解码速率.设计了相应的硬件电路,完成了射频信号的捕捉、放大和曼彻斯特码的解码以及相应的物理解锁动作,介绍了系统的解码算法和硬件的开发流程.系统应用与分析表明,该设计稳定可靠,运行效果良好.

According to the demands of Low-frequency stage and the problems of existing intelligent lock, a design of radio frequency identification （RFID） intelligent lock based on 125 kHz was presented. The design adopt STM8s103F3 as main control chip and AT24C02 as memory data chip.The characteristics of system was employing operational amplifier circuit to acquire message of radio frequency identification which could decrease costing and increase decoding speed. The hardware circuit of intelligent lock was designed, it had the functions of radio-frequency signal acquisition and amplification, Manchester code decode and physical deblocking action. The design of hardware circuit and decoding algorithm were introduced. The system application and analysis results showed that the system could work stability and the operation effect was good.