煤气泄漏报警器论文

摘要I摘要随着社会科学技术的发展带动的经济增长，广大居民对自身的生活质量和生活环境越来越重视，因此天然气、煤气的广泛使用为人们带来了极大的方便，与此同时也带给人们潜在的危险。由于近几年来人们更多地采用更安全的天然气燃料，导致对煤气燃料的疏忽，由煤气导致的家庭煤气中毒与爆炸事件不在少数，因此有一个能及时并准确检查煤气泄漏报警装置十分重要。本次设计是基于单片机和气体传感器作为可燃性气体泄漏报警器设计的核心器件，配合其他的器件即可实现室内温度显示和报警功能等。设计中单片机作为系统的控制器件，选用气体传感器来实现对可燃性气体的检测。煤气泄漏报警器主要由单片机控制系统电路、温度信号和气体信号的采集及模数转换电路、声光报警电路、数码管显示电路构成。此次设计合理，价格低廉、电路原理简单易懂，具有一定的实用性价值。论文主要针对控制系统电路和其它模块电路之间的接口连接方式以及系统的软件设计进行重点的分析和讲解。关键词：煤气泄漏；单片机；气体传感器ABSTRACTIIABSTRACTWiththedevelopmentofsocialscienceandtechnologydriveneconomicgrowth，themajorityofresidentsontheirownqualityoflifeandlivingenvironmentseriouslymoreandmore，soitiswidelyusedinnaturalgas，coalgasbringsgreatconveniencetopeople,atthesametimealsobringpotentialdanger.Inrecentyears，moreandmorepeopleusingnaturalgasasfuelformoresecurity，leadingtothegasfuelgascausedbynegligence，thefamilyofgaspoisoningandexplosionintheminority，soonecantimelyandaccuratelyisveryimportanttocheckthegasleakagealarmdevice.Thisdesignsthecoredeviceofgassensorbasedonsinglechipmicrocomputerandthecombustiblegasleakagealarmdesign，cooperatewithotherdevicescanachievetheindoortemperaturedisplayandalarmfunctions.ThedesignofMCUasthecontroldevice,thegassensorfordetectionofcombustiblegas.Thealarmismainlycomposedofsinglechipcomputercontrolsystemcircuit，analogtemperaturesignalacquisitionandsignalconversioncircuitandgas,soundandlightalarmcircuit，digitaldisplaycircuitcomposedofagasleak.Thereasonabledesign,lowprice，simplecircuit,hassomepracticalvalue.Thesoftwaredesignofpaperbetweenthecontrolsystemcircuitandothercircuitmoduleinterfaceconnectionmodeandsystemanalysisandexplanationofthekey.Keywords：gasleakage；MCU；gassensor目录III目录第1章引言.....................................................................................................................51.1选题背景...........................................................................................................51.2设计课题的目的及意义...................................................................................51.3课题的国内外研究现状.....................................................................................61.3.1可燃性气体泄漏报警器种类与结构........................................................61.3.2国内外情况及其发展趋势........................................................................6第2章系统概述.............................................................................................................82.1课题的主要任务.................................................................................................82.2方案的选择.........................................................................................................82.3单片机的选型...................................................................................................82.3.1AT89C52单片机简介................................................................................92.3.2单片机引脚功能介绍.............................................................................102.4气体传感器选型................................................................................................122.4.1气体传感器的介绍...............................................................................122.4.2气体传感器的分类...............................................................................132.4.3MQ-2气体传感器..................................................................................152.5煤气泄漏报警器的工作结构和原理................................................................162.6系统组成............................................................................................................17第3章硬件设计...........................................................................................................193.1MQ-2气体传感器感应模块.............................................................................193.2DS18B20温度传感器感应模块.......................................................................193.2.1DSl8B20简介......................................................................................203.2.2DSl8B20具体参数及工作方式..........................................................243.2.318B20接口电路..................................................................................253.3AT89C52单片机................................................................................................273.3.1AT89C52单片机管脚图..........................................................................273.3.2时钟电路........................................................................................................273.3.3复位电路.................................................................................................28目录IV3.4A/D转换模块....................................................................................................293.5按键控制模块...................................................................................................293.6数码管显示模块...............................................................................................303.8蜂鸣器报警模块...............................................................................................31第4章软件设计................................................................................