摘 要：随着人民生活的提高和社会经济的飞速发展，人们对社会治安问题的关注度也越 来越高。防盗报警系统的运用范围变得越来越大。但是目前我国的防盗报警系统主要应用 在商场、博物馆等重要场所，这些防盗报警器往往安装复杂，使用维护成本高，而居民住 宅、小型办公室、小型机房等支持资金较为缺乏且确实需要监控报警的场所缺少高效廉价 的防盗报警系统。

本设计选用热释电红外传感器为探测器，以 AT89C51 单片机为处理核心，利用声光报 警的方式开发并完成了一个防盗报警器。整个防盗报警系统分为探测电路模块、信息处理 模块、键盘控制模块、复位电路模块以及声光报警模块。在布防状态下，热释电红外传感 器检测到信号后，送至信息处理模块中的主机提出申请，待单片机响应后，驱动声光报警 中的蜂鸣器以及发光二极管进行报警。经过分析和实验，此设计方案合理，产品性能可靠， 完全可以用于普通家庭防盗。70531

毕业论文关键字：AT89C51，防盗报警 ，热释电红外传感器 ，声光报警

ABSTRACT: Because of theft cases have occurred from time to time in modern society, people hope that their life will become better , at the same time ,they also want their property is well protected. Anti theft alarm system in our country gradually develop. It’s scope of action becomes larger and larger.But at present China's anti-theft alarm system is mainly used in shopping malls, museums and other important places, the burglar alarms often complex installation, use and maintenance costs are high, and residential, small office, small rooms, and other  financial support is lacking and really need monitoring alarm places lack of cheap and efficient anti-theft alarm system.

This design selects the pyroelectric infrared sensor as the detector, using AT89C51 single chip microcomputer as the processing core, the use of sound and light alarm way to develop and complete a burglar alarm. The whole anti-theft alarm system is pided into detection circuit module, information processing module, keyboard control module, reset circuit  module and sound and light alarm module. In the deployment of state, heat release electric infrared sensors to detect the signal and sent to the information processing module of the host to apply, to be single response, driving acousto-optic alarm buzzer and light-emitting diode alarm. Through analysis and experiment, the design scheme is reasonable and the product performance is reliable. It can be used for the common family security.

Keywords：AT89C51,Burglar Alarm,Sensors,Audible And Visual Alarm

目 录

1 绪论 1

1.1 研究的目的和意义 1

1.2 国内外发展现状 2

1.3 主要内容以及步骤 3

2 系统总方案设计 4

2.1 防盗报警器的总体方案设计 4

2.2 防盗报警器的工作原理 5

3 传感器简介 6

3.1 传感器的定义、组成及分类 6

3.1.1 传感器定义 6

3.1.2 传感器的组成及分类 6

3.2 传感器的基本特性 7

3.2.1 静态特性 7

3.2.2 动态特性 8

3.3 传感器的选择与使用 8

3.3.1 传感器的选择