摘 要随着经济技术的不断发展，安全问题越来越受到人们的关注，所以科学化的安全管理已成为企业、学校和住户有力的保障。伴随着智能化时代的到来，高新技术和先进的电子产品的出现使越来越多的用户都选择了智能门禁系统。它简单高效，反应迅速，能够设置人员通行的权限组别，而且门禁卡携带方便，还具有一卡多用的特点。77710

本设计是基于单片机的门禁系统。系统包括单片机最小系统模块，门控锁电路、按键电路、报警电路、读卡电路、显示电路。该系统的主要过程是：当刷卡时，若卡号是正确的，即符合权限，则显示屏会显示卡号，延时一段时间发出开门信号，指示灯亮，延时一段时间发出关门信号。另外如果卡号是错误的，即不符合权限，则开门继电器是不会打开的，蜂鸣器发出报警信号。该设计能够基本满足门禁系统所需的功能，有一定的实用性。

    该论文有表6个，图19幅，参考文献20篇。

毕业论文关键词：门禁系统  单片机  射频卡  液晶显示 

Entrance Guard System Based on Single Chip Microcomputer 

Abstract With the development of economy and technology, more and more people pay attention to the security problem。 So the scientific management has become a powerful enterprise to the school and the resident。 With the advent of the era of intelligent, high-tech and advanced electronic products appear to make more and more users have chosen the intelligent entrance guard system。 It is simple and efficient, quick response, it can set the access control group and the access card is convenient to carry, but also has a multi-purpose card features。

This design is based on the single-chip microcomputer control system。 The system comprises a single chip microcomputer minimum system module, a gating circuit, a key circuit, an alarm circuit, a card reading circuit, a display circuit。 The main process of the system is that when we swipe the card; if the card is correct, that is consistent with the authority, the display will show the card number。 For a period of time, it gives out a signal to open the door, the indicating lamp is bright; for a period of time, it gives out a closing signal。 In addition, if the card number is wrong, that is not in conformity with the authority。 Then the door is not open relay, buzzer alarm signal。 The design can basically meet the needs of the functions of the entrance guard system, it has a certain practicality。

This paper has 6 tables, 19figures and 20 references 。

Key Words：Entrance guard system  MCU  RFID  Display circuit 

目 录

摘 要 I

Abstract II

目 录 III

图清单 V

表清单 V

1 绪论 1

1。1引言 1

1。2 门禁系统的发展趋势 1

1。3 主要研究内容 2

2 工作过程及相关技术介绍 3

2。1门禁系统的工作过程 3

2。2 RFID技术介绍 3

2。3本章小结 4

3 设计方案及芯片介绍 5

3。1 设计的要求 5

3。2方案的选择