摘要温度测量技术应用十分广泛，而且在现代设备故障检测领域中也是一项非常重要的技术。但在某些应用领域中，要求测量温度用的传感器不能与被测物体相接触，这就需要一种非接触的测温方式来满足上述测温需求。本论文正是应上述实际需求而设计的红外测温仪。本设计将对硬件选择以及结构进行设计，并且采用新型的可编程温度传感器TN901，它的优点是能直接与单片机完成数据采集和处理，实现方便、精度高，性能稳定，并且不需复杂的信号调理电路和A/D转换电路。不需要使传感器TN901与人体接触，进行温度感应后，TN901就可以感应温度并且直接送入AT89S51单片机中，经过单片机的信号处理并将其送出，通过LCD1602显示屏进行显示。这样的好处是可以快速并精准的测量出人体体温，与传统的水银体温计相比，它的优点是测量精准度高、测量时间短、并且方便读数。关键词：51单片机；TN901红外测温仪；LCD1602液晶显示屏ABSTRACTThetechnologyoftemperaturemeasurementisusedwidespread,anditalsoimportantinthemodernequipmentfailureexaminationfield.Butinsomeapplicationdomains,weneedn’tthesensorcontactwiththemeasuredobjectwhichusedintemperaturemeasurement,thisneedsakindofnon-contacttemperaturemeasurementtosatisfiesthedemandandthedesignofthisinfraredthermometerisalsobasedonthedemand.Thedesignandstructurewillbedesignedhardwareoptions,andusingthenewprogrammabletemperaturesensorTN901,itsadvantageistobecompletedandSCMdataacquisitionandprocessingdirectlyrealizetheconvenience,highprecision,stableperformance,andwithoutcomplexsignalconditioningcircuitandA/Dconvertercircuit.TN901doesnotneedtomakecontactwiththehumanbodysensor,temperaturesensorafter,TN901cansensetemperatureanddirectlyintotheAT89S51microcontroller,aftersignalprocessingandmicrocontrollersentoutbyLCD1602digitaltubedisplay.Theadvantageisthatyoucanquicklyandaccuratelymeasurethebodytemperature,comparedwiththetraditionalmercurythermometer,ithastheadvantageofhighmeasurementaccuracy,measurementtimeisshortandeasytoread.KEYWORDS：the51single;theTN901infraredthermometer;theED1602LCD目录摘要..........................................................................................................................IABSTRACT.............................................................................................................II目录.......................................................................................................................III1绪论........................................................................................................................12系统的原理及方案................................................................................................32.1温度测量技术的概述.....................................................................................32.2红外测温原理及方法....................................................................................32.3红外测温系统的方案介绍............................................................................43红外测温系统的硬件设计...................................................................................83.1单片机处理模块.............................................................................................83.2红外测温模块...............................................................................................103.3电源模块.......................................................................................................103.4键盘模块.............................................................................
