火灾报警系统的研究与设计摘要：伴随智能化建筑的持续出现，当代建筑电气科技也开始出现。在建筑电气技术中，火灾报警控制系统是一个非常关键且必不可少的子系统，它是以电子通信、传感器、计算机等技术为基础的一个系统。本文设计主要将DS18B20温度传感器、MQ-2烟雾传感器以及AT89C51单片机技术作为核心，与多样电子技术相互结合，从而完成的火灾报警系统。系统重点由单片机主控处理、A/D转换、数据筹集、报警电路以及显示等众多模块构成。关键词：烟雾；报警器；传感器；单片机ResearchandDesignofFireAlarmSystemAbstract:Withtheadventofintelligentbuilding,modernconstructionelectricaltechnologyalsoemerged.Firealarmcontrolsystemisaverykeyandindispensablesubsystemsinthebuildingelectrictechnology,itiselectroniccommunications,sensor,computerandothertechnologyonthebasisofasystem.IsdesignedinthispaperusingDS18B20temperaturesensortechnology,MQ-2smokesensorsandAT89C51asthecore,withavarietyofelectronictechnologycombinedwitheachother,soastocompletethesmokealarm.Thesystemiscomposedofsinglechipcomputercontrolmodule,A/Dconversionmodule,dataacquisitionmodule,alarmcircuitmodule,displaymodulefivemodules.Keywords：Smog;alarmapparatus;sensor;singlechip目录1引言................................................................................(1)1.1火灾自动报警系统的作用...............................................(1)1.2选题的目的、价值及意义...............................................(2)1.3国内外的发展趋势...........................................................(2)2系统设计........................................................................(4)2.1设计任务及要求................................................................(4)2.2系统框图及工作原理.......................................................(4)3系统主要元器件............................................................(5)3.1单片机AT89C51................................................................(5)3.2温度传感器.......................................................................(6)3.3烟雾传感器.......................................................................(7)3.4液晶显示屏........................................................................(8)4单元电路的设计............................................................(8)4.1单片机最小系统...............................................................(8)4.2蜂鸣器驱动电路..............................................................(10)4.3键盘电路..........................................................................(11)4.4显示电路..........................................................................(12)4.5时钟模块及接口电路.....................................................(13)4.6A/D转换电路..................................................................(14)5软件设计......................................................................(16)5.1主程序设计.....................................................................(16)5.2A/D转换器程序设计......................................................(18)5.3时钟模块程序设计..........................................................(19)6系统仿真......................................................................(20)6.1初始状态下的仿真效果.................................................(20)6.2烟雾报警的仿真效果......................................................(20)6.3温度报警的仿真效果.....................................................(...
