基于单片机的微波防盗报警器设计.doc

基于单片机的微波防盗报警器设计

摘要：本文基于单片机设计了一个微波防盗报警系统。该系统控制核心用的是AT89C52，主要包括微波探测器、热释电式红外传感器、单片机控制、信号放大及相关的驱动电路组成。本设计操作简单、运行可靠，除了具有基本的防盗报警功能，还能够实现自动探测信号和自动报警功能。自动探测是由热释电红外传感器和微波探测器共同完成，双探测器的应用使得系统的可靠性大大增强，误报率明显降低；自动报警是指当单片机接收到由探测器检测到入侵信号时，通过程序控制自动输出报警信号引发扬声器和LED发光报警。

关键词：微波探测器；单片机；热释电式红外传感器；防盗报警

 The Design of Microwave Anti-theft Alarm Circuit

       College of Physics and Electronic Information  Electronic Information Science and Technology

Abstract : This system includes two parts: hardware design and software design. Hardware design is consisted by microwave detector circuit design, pyroelectric infrared sensors design, single-chip microcomputer control circuit design, signal amplifier circuit design and relevant driver circuit design. The whole system is controlled by the system software. This topic designs a simple and reliable operation of the anti-theft alarm system based on single chip. It has a basic security alarm function ,and it can automatically detect the signal and realize the automatic alarm. Automatic detection is completed by both of pyroelectric infrared sensors and microwave detector. Double detector application makes the system reliability greatly enhanced, it also reduced the rate of false positives. The automatic alarm means that when microcontroller receives the invasion signal by the probe detector, it will automatically output alarm signal to trigger the speaker and LED through the program controlling.

Key words: Microwave detector; MCU; Pyroelectric infrared sensors; Anti-theft Alarm

目    录

摘要 1

1 引言 3

2 系统总体方案设计 4

2.1 整体电路框图 4

2.2 报警器的功能及工作过程 4

3 系统硬件设计 5

3.1 电源模块 5

3.2 控制模块 5

3.2.1 AT89C52单片机介绍 6

3.2.2 复位、晶振电路的设计 7

3.3 探测器模块 7

3.3.1 热释电红外线探测器 8

3.3.2 微波感应模块 11

4 信号处理模块 13

4.1 HN911L的输出信号处理模块 13

4.2 HB100输出信号处理模块 13

5 声光报警模块 14

5.1 报警电路的设计 14

5.2 蜂鸣器报警电路的设计 14

5.3 LED显示模块 15

5.4 手工暂停模块 16

6 软件的程序实现 17

6.1 中断服务程序工作流程图 17

6.2 主程序工作流程图 17

7 总结 19

参考文献 20

附录1：程序 21

附录2：微波报警原理图 23