本文档详细介绍了一个基于单片机技术设计和实现的防盗警报系统的开发过程。通过集成传感器与声音报警装置，该系统能够有效监测非法入侵并迅速发出警告，为家庭及小型企业的财产安全提供可靠保障。
《单片机原理与外围电路》课程论文
题目：防盗报警器
姓名 学
摘要：随着社会的发展，人们的生活质量不断提高，拥有了更多的奢侈品，因此防盗就 成了一项重要的课题。本次毕业设计的红外线防盗报警器是基于电源电路给整个电路提 供+5V电压，通过红外线发射和接受系统来感应是否有人闯入，并通过单片机系统向声光 报警电路发出信号，达到声光报警的目的。论文首先简单介绍了红外线防盗报警器的发 展背景、基本电路结构和工作原理，以及国内红外线防盗报警器的发展状况，然后结合 应用电路具体介绍了该应用电路的工作原理。论文详细论述了电源电路的具体变压、整 流、滤波、稳压过程，以及通过单片机系统内部程序的设定来区分红外线接受端电压的 变化，并通过单片机来控制声光报警电路，最后通过555定时器来输出稳定的信号。
关键词：报警器；51单片机；红外传感器；555定时器
Abstract: Along with the development of society, peoples quality of life has improved and they have more luxuries. Therefore, security becomes an important issue. The infrared intrusion alarm designed for this graduation project is based on a power supply circuit that provides +5V voltage to the entire system. It uses an infrared emission and reception system to detect whether someone has entered and sends signals through a microcontroller to sound-light alarm circuits, achieving the purpose of sounding alarms visually and audibly. The paper first briefly introduces the development background, basic circuit structure, working principle, and domestic development status of infrared intrusion alarms. Then it specifically describes how this application works in conjunction with specific circuits. It discusses in detail the process of voltage transformation, rectification, filtering, and stabilization in power supply circuits as well as distinguishing changes in voltage at the infrared reception end through program setting within a microcontroller system. The paper also explains how to control sound-light alarm circuits via the microcontroller and finally outputs stable signals using 555 timers.
Keywords: Alarm; 8051 Microcontroller; Infrared Sensor; Timer 555
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