多点温度检测系统设计.doc

摘要环境温度对工业、农业、商业和人们的日常生活都有很大的影响，而温度的测量也就成为人们生产生活中一项必不可少的工作。随着单片机技术的不断发展，单片机在日用电子产品中的应用越来越广泛，温度传感器DS18B20具有线性优良、性能稳定、灵敏度高、抗干扰能力强、使用方便等优点，广泛应用于冰箱、空调器、粮仓等日常生活中温度的测量和控制。本设计所介绍的数字温度计使用单片机AT89s52单片机，测温传感器使用DS18B20，用4位共阴极LED数码管以动态方式实现温度显示,分时轮流通电，从而大大简化了硬件线路，同时，采用串口通信方式可大大简化硬件电路和软件程序的设计，节省了I/O口。DS18B20数字温度传感器是单总线器件与51单片机组成的测温系统，具有线路简单、体积小等特点，而且在一根通信线上，可以挂接多个DS18B20，因此可以构成多点温度测控系统。qtr2rMB。vBEaehC。关键词：单片机；多点检测；串口通信AbstractEnvironmentaltemperaturetoindustry,agriculture,commerce,andpeople'sdailylifehasalotofinfluence,andthemeasurementofthetemperaturewillbecomeanindispensablepeopleproductionandlifeofthework.Alongwiththedevelopmentofthesinglechipmicrocomputertechnology,microcomputerinthedailyelectronicproductsismoreandmoreextensiveapplication,thetemperaturesensorDS18B20havegoodlinear,stableperformance,highsensitivity,anti-interferenceabilitystrong,easytouse,widelyusedintherefrigerator,airconditioner,granaries,etcindailylifetemperaturemeasurementandcontrol.Bjp0KSJ。IUAlwum。Thedesignofthedigitalthermometerintroducedusesinglechipcomputer89s52microcontroller,temperaturesensorDS18B20use,withatotalof4cathodetubeLEDdigitaldisplaytorealizedynamicwaytemperature,inturntime-sharingelectricity,whichgreatlysimplifiedthehardwarecircuit,andatthesametime,theserialinterfacecommunicationmodecangreatlysimplifiedthehardwarecircuitandsoftwareprogramdesign,savetheI/Oport.DigitaltemperaturesensorDS18B20isthesinglebusdevicesand51SCMcomposition,temperaturemeasurementsystem,withsimpleline,littlevolumefeatures,butatacommunicationsline,canbearticulatedmultipleDS18B20,socanformmulti-pointtemperaturemeasurementandcontrolsystem.xhyt9ru。lC9dxsE。KeyWords:SingleChipMicrocomputer;Multi-pointdetection;Serialcommun-kHM0fJ5。QxGgKZa。-ication目录TOC\o"1-3"\h\uHYPERLINK\