基于单片机的火灾报警系统的设计与实现毕业论文.doc

PAGE 摘 要 随着现代信息技术的飞速发展和工业自动化技术的逐步实现，人们对建筑物内的安全性和灾害预警系统更加重视，为预防楼房内的火灾，人们已采取许多方法来防范火灾的发生。其中就包括通过信息化和自动化的方法来检测楼房内的烟雾和温度，达到检测火灾的目的。 本论文以电阻式烟雾传感器和单片机技术为核心并与其他电子技术相结合， 设计出一种技术水平较好的火灾报警器。其中选用MQ-2型半导体可燃气体敏感元件烟雾传感器实现烟雾的检测，以AT89S52单片机和MQ-2型半导体电阻式烟雾传感器为核心设计的火灾报警器可实现报警、故障自诊断、浓度级别显示、报警限设置、温度显示及与温度报警值设定等功能。是一种结构简单、性能稳定、使用方便、价格低廉、智能化的火灾报警器，具有一定的实用价值。 关键词：火灾报警；单片机；烟雾传感器；温度传感器； Abstract With?the?rapid?development?of?modern?information?technology?and?industrial? automation?technology?gradually?realize,?people?on?the?structures?within?the?safety?anddisaster?warning?system?more?attention,?to?prevent?the?fire?in?the?building,?people?have?taken?many?methods?to?prevent?fire.?Including?through?informatization?and?automated?method?to?detect?the?smoke?in?the?building?and?temperature,?achieve?the?purpose?of?fire detection.? In this paper, resistance type smoke sensor and single-chip microcomputer as the core technology and electronic technology, designs a technology better fire alarm. The selection of MQ-2 type semiconductor gas sensitive element smoke sensor smoke detection. The selection of AT89S52 chip, the integration of the A/D conversion, hardware multiplier, hardware pulse width modulator and other resources. With AT89S52 MCU and MQ-2 type semiconductor resistor type smoke sensor as the core design of the fire alarm can alarm, fault diagnosis, concentration level display, alarm limit settings, temperature display and temperature alarm value setting and other functions. Is a kind of simple structure, stable performance, convenient operation, low price, intelligent fire alarm, has a certain practical value. Key words: Fire alarm; Single chip microcomputer; The smoke sensor; The temperature sensor PAGE 23 目 录 TOC \o 1-2 \h \z \u HYPERLINK \l _Toc390582943 第1章 绪论 PAGEREF _Toc390582943 \h 1 HYPERLINK \l _Toc390582944 1.1 课题研究背景及意义 PAGEREF _Toc390582944 \h 1 HYPERLINK \l _Toc390582945 1.2 火灾报警器的发展历程和发展现状 PAGEREF _Toc390582945 \h 1 HYPERLINK \l _Toc390582946 1.3 论文主要内容及结构安排 PAGER