基于rfid的门禁控制系统设计.pdf

摘 要 智能门禁系统在自动化应用中十分普遍，它为人们日常生活提供便利和保障人们的 生活安全，随着社会和经济的发展需要，智能识别技术开始运用于许多行业，特别安全 系数特别高的行业（银行、机密机构）、门控行业等，智能门禁系统的便利性和安全性 让它越来越受到重视。 本设计分析了 RFID 门禁系统的国内外发展现状、未来发展趋势和目前主要存在的 问题，提出了基于RFID 门禁控制系统的设计方案。先阐述了RFID 门禁控制系统的组成、 系统的基本工作原理，分析了系统的硬件电路设计、软件设计过程，对硬件子电路的选 型设计、子程序设计、串口通讯程序设计等作了详细的介绍。 门禁系统采用AT89C52 单片机作为控制核心，由 MFRC500 读卡控制单元、射频天线 电路、看门狗复位电路、报警电路、电控锁控制电路组成。在仿真通过键盘输入模拟读 卡器数据读入，系统通过输入密码与设定密码对比，实现对通道进出权限的控制（密码 输入进门的控制）；在异常情况下（非法侵入、门超时未关）自动报警、手动报警。 关键词：RFID 门禁系统;射频技术；智能控制;MFRC500 Abstract The intelligent entrance guard system is very common in automationapplications, it provides convenience and guarantee people's life safety of people's daily life, along with the development of society and economy, the intelligent recognition technology has been used in many industries, especiallythe safety coefficient of particularly high industry (bank), gated industry, convenience and security intelligent access control system to make it more and more attention. Analysis of the design of the RFID access control system at home and abroad,the future development trend and main problems, put forward a design scheme of access control system based on RFID. First elaborated the basicprinciple, system composition of RFID access control system, analyzes the system hardware circuit design, software design, hardware design, selection ofthe sub circuit subroutine design, serial communication program design in detail. Access control system using AT89C52 microcontroller as control core, theMFRC500 card control module, RF circuit, watchdog reset circuit, alarm circuit,electric control lock control circuit. Through the keyboard input analog card reader reads data in the simulation system, using a password and thepassword comparison, control the import permission on the channel (controlpassword door); in exceptional circumstances (illegal intrusion, not closing thedoor overtime) aut