摘要随着现代信息技术的飞速发展和传统工业改造的逐步实现．能够独立工作的温度检测和显示系统应用于诸多领域。传统的温度检测以热敏电阻为温度敏感元件。热敏电阻的成本低，但需后续信号处理电路，而且可靠性相对较差，测温准确度低，检测系统也有一定的误差。与传统的温度计相比，这里设计的数字温度计具有读数方便，测温范围广，测温精确，数字显示，适用范围宽等特点。选用单片机STC89C51作为主控制器件，1个DSl8B20温度传感器作为测温器件，通过数码管实现温度显示。这样一来我们就可以创建一个智能的温度监控系统了。由于DS18B20的物理化学性能稳定，线性度较好，在0℃~100℃最大线性偏差小于0.1℃。该器件可直接向单片机传输数字信号，便于单片机处理及控制。另外，该温度计还能直接采用测温器件测量温度，从而简化数据传输与处理过程。关键词:单片机，DSl8B20测温传感器，数码管，数字温度计AbstractWiththegradualimplementationoftherapiddevelopmentofmoderninformationtechnologyandtraditionalindustrytransformation.Canworkindependentlyofthetemperaturedetectionanddisplaysystemiswidelyusedinmanyfields.Thetraditionaltemperaturedetectionbythermistorastemperaturesensitiveelement.Thermalresistanceandlowcost,butthesubsequentsignalprocessingcircuit,moreoverthereliabilityisrelativelybad,thetemperaturemeasurementaccuracyislow,thedetectionsystemalsohascertainerror.Comparedwiththetraditionalthermometer,hereisthedesignofdigitalthermometerreadingconvenience,awiderangeoftemperaturemeasurement,accuratetemperaturemeasurement,digitaldisplay,applicablescopewideandsooncharacteristics.SinglechipSTC89C51asthemaincontroldevice,1DSl8B20temperaturesensorasatemperaturemeasuringdevice,temperaturedisplaythroughthedigitaltube.Temperaturemonitoringsystemsothatwecancreateasmart.BecauseofthephysicalandchemicalpropertiesofDS18B20stability,goodlinearity,at0DEG~100DEGmaximumlineardeviationislessthan0.1DEGC.Thedevicecanbedirectlytothedigitaltransmissionchipsignalmicrocontroller,easyprocessingandcontrol.Inaddition,thethermometertemperaturemeasurementdevicecanbeuseddirectlytomeasuretemperature,soastosimplifytheprocessofdatatransmissionandprocessing.Keywords:DSl8B20microcontroller,temperaturesensor,digitaltube,digitalthermometer目录摘要...........................................................................................................IAbstract......................................................................................................II第1章绪论............