基于单片机的红外感应防盗报警器的硬件设计 大学论文.doc

 基于随着社会的不断进步电子技术的不断发展人们的生活水平得到了很大的改善许多高科技产品的使用越来越成为家庭生活的主旋律因此人们对自己所处环境的安全要求就越来越高特别是家居安全不得不时刻留意不速之客的光顾。为此许多小区家庭都安装了报警系统这有效的保证了居民的人身财产安全。本文介绍一种利用热释电红外传感器进行监控报警系统的设计。该报警器主要由热释电红外传感器及其检测电路报警电路组成。热释电红外传感器是报警器设计中的核心器件它可把人体的红外信号转换为电信号以供信号处理部分使用。检测电路主要是把传感器输出的微弱电信号进行放大、滤波而实现报警功能。关键词：  Software Design of Infrared Induction Anti-theft Alarm Based on MCU Abstract：With the social progress and electronic technology development, peoples living standards have been greatly improved. The use of many high-tech products has increasingly become the main theme of family life, so people pay more attention to their safety requirements, especially in home safety, always have to keep an eye on strangers. Therefore, many residential areas and families install alarm system, which can effectively guarantee the personal and property safety. This paper introduces the hardware design of the monitoring and alarm system by using pyroelectric infrared sensors. This alarm system is mainly composed with pyroelectric infrared sensor, detection circuit, and alarm circuit. Pyroelectric infrared sensor is the core device of alarm, which can translate the bodys infrared signal into electrical signal in order to processing. The detection circuit can amplify and filter the weak signal from the sensor. Combined with the analysis of microcontroller software program, the system accomplishes the functions of sound and light alarm. Key words: Pyroelectric Infrared Sensor, Data Acquisition, Alarm Circuit, MCU 目录 第1章 绪论 2 1.1 选题的目的与意义 2 1.2 本课题在国内外的发展现状 2 1.3 本课题要解决的主要问题 3 第2章 系统设计方案 5 2.1 方案选择论证 5 2.2 AT89S52单片机简介 5 第3章 热释电红外技术概述 11 3.1 热释电传感器的红外辐射与红外探测的原理结构 11 3.2 红外测温原理 12 3.3 热释红外传感器的结构 12 3.4 菲涅尔透镜 15 3.5 热释电红外感应模块电气参数 16 3.6 热释电红外感应模块功能特点及使用说明 16 第4章 系统硬件电路设计 19 4.1 总体设计思路 19 4.2 具体电路模块设计 20 4.2.1 单片机最小系统电路 20 4.2.2 热释电红外感应模块电路 20 4.2.3 放大电路的设计 21 4.2.4 声音报警器的设计 21 4.2.5 LED报警电路 22 4.2.6 报警温度设定按键电路 22 第5章 系统调试 24 结束语 27 致谢 28 参考文献 29 附录一 红外防盗报警器电路图 30 附录二 红外防盗报警器PCB图 31 附录三 英文文献翻译 32 第1章