摘 要：随着信息技术与自动识别技术的快速发展，门禁系统自动化程度越来越高，人们对出入安全的要求也随之提高，传统的磁卡式门禁系统因其读写速度慢、易磨损等缺点已经不能适应现代智能化建筑对安防系统的要求。射频识别技术的出现很好的弥补了这些不足。射频（RFID）卡就是非接触式IC卡，因其读写速度快，寿命长，使用方便等优点使得基于射频技术的门禁系统中已经成为现代门禁市场的主流。59195

本文研究的基于RFID技术的门禁系统中控制核心选用了STC89C52单片机,外围电路包括键盘输入模块，液晶显示模块、数据记录模块，语音模块、报警模块等。通过Protues软件实现了对门禁系统的仿真，结果表明符合系统的设计。

毕业论文关键词:  RFID, 门禁系统, 自动化控制

Abstract: With the rapid development of information technology and automatic identification technology，the automatic degree of entrance guard system has been higher and higher. People’s needs of the access security is increasing too. Traditional magnetic card entrance guard system because of its disadvantages such as slow speed, easy abrasion has been unable to meet the modern intelligent building requirement for security system, The emergence of radio frequency identification technology is well to make up for these deficiencies. Rf (RFID) card is a non-contact IC card, Due to the high speed of read and write. long using time, convenient use etc .making the entrance guard system which based on radio frequency technology, has become the mainstream of modern access control market. 

In this research, the STC89C52 MCU was selected as the control core of the access control system with RFID technology, and the peripheral circuit includes  keyboard input module, liquid crystal display module, data recording module, voice module, alarm module. Through the Protues software, the simulation results of access control system has been realized, and the results show that the system was designed. 

Keyword:  RFID, entrance guard system, Automatic control

目   录

1  绪论 5

1.1  设计背景及意义 5

1.2  国内外研究现状 5

1.3  本文的主要设计内容 6

2  门禁系统的总体设计 6

2.1  系统的整体设计与功能 6

2.2  射频识别技术的简介 8

2.3  射频芯片与IC卡 12

3  系统各模块硬件设计 14

3.1  门禁主控模块 14

3.2  显示模块的设计 14

3.3  语音模块的设计 15

3.4  数据传输模块 16

3.5  其他外围接口电路模块 16

4  门禁系统软件设计 18

4.1  软件设计各模块及功能 18

4.2  门禁控制的工作流程 19

4.3  软件仿真 20

结  论 22

参考文献 23

致  谢： 24

附录A 系统仿真图 25

附录B STC89C52与MFRC500接口图