共页第页摘要单片机技术已经普及到我们生活，工作，科研，各个领域，已经成为一种比较成熟的技术,本文将介绍一种基于单片机控制的数字温度器，本温度计属于多功能温度计，可以设置上下报警温度，当温度不在设置范围内时，可以报警。随着现代工农业技术的发展及人们对生活环境要求的提高，人们也迫切需要检测与控制温度。本文通过采用蜂鸣器作为电声元件的温度报警器的设计，阐明了该装置进行设计与制作的具体过程及方法。这种温度报警器结构简单，可操作性强，应用广泛。工作时，温度测量范围为5—38ºＣ。当前环境温度若超过设定的高温临界温度，由单片机发出报警信号，从而防止带来的不必要的损失。造成高温火灾有：电气线路短路、过载、接触电阻过大等引发高温或火灾；静电产生高温或或火灾；雷电等强电侵入导致高温或火灾；最主要是机房内电脑、空调等用电设备长时间工作，导致设备老化，空调发生故障，而不能降温；因此机房内所属的电子产品发热快，在短时间内机房温度升高超出设备正常温度，导致系统瘫痪或产生火灾，这时温度报警系统就会发挥应有的功能。关键词:STC89C51单片机，数字控制，温度计，DS18B20，AT24C02ABSTRACTSinglechiptechnologyhasspreadtowelive,work,scientificresearch,eachdomain,hasbecomeamaturetechnology,thispaperintroducesakindofbasedonsinglechipmicrocomputercontroldigitaltemperaturedevice,thethermometerbelongstothemulti-functionthermometer,cansetupanddownthetemperaturealarm,whenthetemperatureisnotsetrange,youcancallthepolice.Withmodernindustrialandagriculturaltechnologyandthedevelopmentofpeopletotheimprovementofthelivingenvironmentrequirements,andpeopleurgentlyneedtotestandcontrolthetemperature.Throughtheuseofcomponentsofthebuzzerasacoustictemperaturealarmdesign,itisexpoundedthatthedeviceforthedesignandproductionofthespecificprocessesandmethods.Thetemperaturealarmsimplestructure,themaneuverabilityisstrong,wideapplication.Work,temperaturemeasurementrangefor5-38ºC.Thecurrentenvironmenttemperatureifmorethanthehightemperatureofsettingthecriticaltemperature,issuedawarningsignalbysingle-chipmicrocomputer,thuspreventingbringunnecessarylosses.Hightemperaturecausedbyfireare:electricshortcircuit,overload,contactresistancebytoohightemperatureorfire;Electrostaticgenerationhightemperatureororfire;Lightningandleadtohightemperaturesorhighvoltageintothefire;Themainroomisinairconditioningequipmentsuchascomputer,electricityworklonghours,causeofoldequipment,airconditioningfault,andcan'tcooling;Sothetelecomroombelongstoelectronicproductsfeverfast,inashorttime,computerroomtemperaturebeyondnormaltemperatureequipment,causethesystemtoproduceparalysisorfire,whentempera