燃气报警器毕业设计

燃气报警器毕业设计【篇一：煤气报警器毕业设计】煤气警报器设计学院：专业：姓名：学号：指导老师：职称：二○一〇年五煤气报警器设计摘要当今社会上，出现了许多煤气报警器，而这些产品大都是针对煤气的泄漏所做出的相应的报警，即为家庭式煤气报警器。本课题设计煤气报警采用了at89s52单片机为报警器的核心部件，对煤气报警器进行控制。通过nap-505电化学一氧化碳气体传感器对煤气进行检测，将所得的浓度值与设定浓度值相比较得到偏差。通过对偏差信号的处理获得控制信号，发生报警信号，并把报警通道显示并储存在ds12887的ram中，八个单元的煤气浓度对应模拟量利用a/d关键词：单片机煤气浓度报警器idesignofthecoalgas’alarmdeviceabstracttherearemanycoalgasalarm’sdevicesinourlives.thesedeviceswillalarmafterthecoalgasleaking.wecallthemhouseholdorindustyappliances.thispaperintroducesthedesignofacoalgasalarm’sdevicethatusetheat89s52scmasthemostimportantcontroller.itisacore-componentsthatcontrolthewholeprogramsandcircuitofthecoalgasalarm’device.theappliancemonitorsthedensityofcoalgaswiththesensorofnap-505andcomparesthroughthesignalwiththea/dconverter,inadditionwhichiscotrolledwiththekeyboard.wecanmonitortheleakofcoalgasinthehouseorindusty.thehardwaredesignofcircuitsisreasonableandtheperformanceofthecoalgasalarm’sdeviceissafeandreliable.keywords:scmdensityalarm’deviceii目录摘要........................................................................................................iabstract............................................................................................ii1前言....................................................................................................11.1研究背景....................................................................................................11.2研究意义.1.32系统总体设计....................................................................................32.1方案的选择................................................................................................32.2系统流程框图............................................................................................33硬件系统设计与传感器选用............................................................43.1主机部分....................................................................................................43.1.1at89s52单片机......................................................................................43.1.2ds12887实时时钟芯片及其电路.........................................................63.1.3x5045看门狗定时器及复位电路..........................................................83.1.4电源电路................................................................................................93.2功能模块部分............................................................................................93.2.1tlc2543的数据采集单元...................................................................103.2.2hd7279的人机接口电路模块.............................................................123.2.3数据处理模块.......................................................................................153.2.4声光报警模块.......................................................................................16iii【篇二：家用燃气报警器毕业设计论文】本科毕业设计说明书（题目：家用燃气泄漏报警装置的设计学生姓名：学院：机械学院系别：测控系专业：测控技术与仪器班级：测控08-1指导教师：高级实验师二0一二年六月摘要燃气(人工煤气、天然气)的普及，为市民提供了方便，也提高市民的生活质量，但是任何事物都有它的两面性，在使用燃气的过程中，因燃气泄漏等原因造成的燃气爆炸、中毒等意外事故时有发生，给人们的生命和财产安全带来了严重的威胁，因此安全使用燃气，是不可忽视的一个重中之重的工作。家用燃气泄漏报警装置能有效监测环境中可燃气体(如ch4)的浓度，一旦其浓度超出报警限定值，就能发出声光报警信号，并且能随着浓度的增加报警音量逐渐加大，能及时起到安全防范的作用。本设计所研究的可燃性气体报警系统包括：气体信号采集电路、调理电路、模数转化电路、单片机系统电路、报警电路组成，首先利用传感器对可燃气体浓度信号进行监测并且转变成电压信号，选择合适的放大电路，将电压放大到a/d所要求的电压，经过模数转换，将检测的电压值送入单片机，在单片机内完成与设定的电压信号进行比较，当气体浓度超标时，驱动声音和灯光报警。关键词：传感器；报警器；单片机abstractwiththepopularityofgas,forexample(artificialcoalgas,naturalgas),itisprovideaconvenienttocitizensandimprovethequalityoflives,buteverycoinhasitstwosides,attheuseofgasintheprocess,gasexplosioncausedbygasleak,sothatpoisoningandotheraccidentshaveoccurred,itisharmforpeopleandpropertyandbringstheseriouslythreattothesafeuseofgasatthesametime,thedomesticgasleakagealarmdevicecaneffectivelymonitortheenvironmentofcombustiblegases(suchasch4)leakage,onceitsconcentrationbeyondthealarmlimitvalue,cansendoutsoundandlightalarmsignals,andwiththeincreasingconcentrationofalarmvolumeincreasedgradually,thealarmplaysasignificantrole.thesensorespeciallygassensorsusageanduseresearchareneeded.thedesignandresearchofthefamilygasalarmsystemincludes:gassignalacquisitioncircuit,analog-to-digitalconversionelectriccontrolcircuit,thesignalsaremonitoredandconvertedintovoltagesignal,selecttheappropriateamplificationcircuit,thevoltageamplificationtotherequirementofthea/dvoltage,afteranalog-digitalconversion,thedetectedvoltagevalueintothemicrocontroller,inthemcucompletedwithinthevoltagesignaliscomparedwiththeset,whenthegasconcentrationexceedthestandard,drivethesoundandlightalarm.keywords:sensor；alarm；scm目录引言............................................................................................................................1第一章概述..............................................................................................................21.1家用燃气泄露报警的概述...............................................................................21.2家用燃气泄露报警的发展...............................................................................21.3家用燃气泄露报警研究的目的与意义...........................................................3第二章燃气检测传感器的选择................................................