摘要据相关统计，随着家用电器的普及，家庭用电量正呈逐年上升的趋势，家庭火灾发生的频率也越来越高，火灾报警器也随之被广泛应用于各种场合。运用多传感器结合单片机能够有效解决灵敏度与报警准确率之间的矛盾，本文正是利用单片机结合传感器技术而开发设计了这一烟雾监控报警系统。本设计选用MQ-2烟雾传感器、DS18B20温度传感器以及AT89S52单片机作为核心器件并与其他电子技术相结合，通过AT89S52单片机控制传感器对检测地点的烟雾、温度进行实时检测，并把检测结果进行数据信息处理，可以实现声光报警、浓度显示、温度显示等功能。是一种结构简单性能稳定、使用方便、价格低廉、智能化的烟雾报警器，具有一定的实用价值。论文主要针对烟雾报警系统中的各个组成部分及功能进行了详细的介绍和说明，并对其主控电路和外围设备电路之间的接口连接方式以及系统软件设计进行了重点的分析和讲解。关键词：烟雾；报警器；单片机；传感器AbstractAccordingtorelevantstatistics,ashouseholdappliancespopularization,familyelectricityuseisincreasingyearbyyear,familyfireoccurrencefrequencyisalsomoreandmorehigh,firealarmhassubsequentlybeenwidelyappliedinallkindsofsituations.Byusingmicrocontrollercaneffectivelysolvethesensorwithsensitivityandalarmaccuracy.Inthispaper,combinedwiththeuseofsingle-chipsensortechnologydevelopmentanddesignofthesmokecontrolsystem.ThisprotectdesignsabettersmokealarmwithMQ-2smokesensor,DS18B20temperaturesensorandAT89S52typeMCUasthecore,andcombineswithotherelectronictechnology.EachmoduleiscontrolledbytheMCUformonitoringthesmoke,fire,andotherinformationinreal-timeandtheMCUwillprocesstheinformation.Itcanrealizeaseriesoffunctionssuchassoundandlightalarming,thesmokedensityandthetemperaturebeingdemonstrated.Itisonekindofstructuresimple,theperformancestable,easytooperate,thepriceinexpensive,theintellectualizedsmogalarmapparatusandhascertainpracticalvalue.Thesisgivedetailedintroductionforthefunctionandtheoryofthevariouscomponentpartsofthealarmsystem,focusontheinterfacetechnologybetweenitsmaincontrolledcircuitandperipheralcircuit,alsogiveexplanationofthesoftware.Keywords:smoke;alarm;MCU;sensor目录第1章概述.........................................................11.1论文选题背景、目的和意义.....................................11.2烟雾报警器的国内外现状.......................................21.3本论文研究的主要内容.........................................2第2章系统总体设计方案.............................................32.1烟雾检测报警器设计思路........................................32.2烟雾传感器的选型..............................................32.3单片机的选型..................................................82.4DS18B20温度传感器的介绍.....................................122.5本章小结.....................................................16第3章系统的硬件电路..............................................173.1AT89S52单片机最小系统电路...................................173.2烟雾信号采集及A/D转换电路...................................183.3温度采集电路.................................................203.4LCD显示电路.................................................203.5蜂鸣器报警电路...............................................223.6继电器控制电路...............................................233.7按键电路.....................................................233.8本章小结.....................................................24第4章软件设计....................................................254.2主程序初始化流程图..................................
