摘 要:随着科学技术的飞快发展,人们的生活变得越来越便捷,同时利用高科技盗窃也随之而来传统的防盗门窗慢慢满足不了人们需要,在这种情况下,电子门禁系统应运而生。基于这个背景,使用AT89C51单片机作为系统的控制核心,通过RFID卡判断权限反馈给CPU,CPU送出信号来控制电子门锁的开闭,从而隔离陌生人的进入,同时在本次设计中加入了热释电红外传感器和振动位移传感器,在电子门禁中构建报警系统,通过传感器的反馈监视安防情况。65797
毕业论文关键词:门禁,AT89C51单片机,电子门锁,权限,传感器,
Abstract: With the fast development of science and technology, people's lives become more and more convenient, while taking advantage of the high-tech, theft has cropped up. The traditional anti-theft doors gradually cannot meet people’s need. In this case, electronic access control system came into being to solve this problem. Based on this background, the system’s control center is based on AT89C51 microcontroller, use RFID cards to judge the authority and send the feedback to the CPU, CPU sends signals to control electronic locks opened and closed, thereby keeping strangers from coming in. This electronic access control alarm system’s design added electric infrared sensor and vibration displacement sensors to monitor the security situation based on the sensor feedback.
Keyword :Access control, AT89C51 microcontroller, electronic door locks, authority, sensors
目 录
1 系统设计 4
1.1 系统方案的比较 4
1.1.1 选题论证 4
1.1.2 方案选择 4
1.2 CPU的选择 5
1.3 射频IC卡的选择 5
1.4 红外传感器的选择 5
1.4.1 红外传感器的种类介绍 5
1.4.2 热释电红外传感器的介绍和型号选择 6
1.5 振动位移传感器 7
2. 外围硬件电路的设计 8
2.1基本原理: 8
2.2 资源分配: 8
2.3 最小系统设计: 9
2.4 系统电路原理: 10
2.4.1整体电路图: 10
2.4.2门控电锁电路: 12
2.4.3 复合式传感器电路 12
2.4.4 蜂鸣器电路 13
2.4.5 控制工作指示灯 14
2.4.6 出门按钮 15
2.4.7 读卡模块 15
2.4.8 显示模块 18
3 软件设计 19
3.1 流程图: 20
3.2 程序清单: 21
结论 26
致谢 27
参考文献 28
附录1 29
附录2 30
附录3 31
1 系统设计