tn901说明书

TN9红外温度计模块用户手册TN9红外温度计模块目录1概述.....................................................................................................................................................................................3版本2004.7.........................................................................................................................................................................32理论基础.............................................................................................................................................................................42.1工作原理.......................................................................................................................................................................42.2特点...............................................................................................................................................................................52.3视场...............................................................................................................................................................................62.4发射率...........................................................................................................................................................................73规格.....................................................................................................................................................................................73.1极限值...........................................................................................................................................................................73.2直流参数1...................................................................................................................................................................73.3测试规范.......................................................................................................................................................................93.4TN0;TN9引脚排列....................................................................................................................................................104串行输出...........................................................................................................................................................................114.1框图.............................................................................................................................................................................114.2SPI时序.......................................................................................................................................................................124.2.1信息格式.............................................................................................................................................................134.2.2例子.....................................................................................................................................................................134.2.3怎么样修改发射率?(怎么样修改发射率数据到EEPROM)..........................................................................145接口演示板:HUB-D........................................................................................................................................................156PC接口程序......................................................................................................................................................................16TN9红外温度计模块概述本文描述了TNm(TN0;TN9)系列产品的使用方法。版本2005.3版权:版权所有。未经授权，禁止全文或者部分复印该文件。本文件的内容有修改不另行通知.LimitedWarranty:Thisdatasheetcontainsinformationspecifictoproductsmanufacturedatthetimeofitspublication,Contentshereindonotconstituteawarranty.TrademarkAcknowledgements:Alltrademarksarethepropertyoftheirrespectiveowners.TN9红外温度计模块理论基础2.1工作原理Fig1.theInfraredRadiationSpectreumInfrared,justlikeanylightray,isanElectromagneticRadiation,withlowerfrequency(orlongerwavelength)thanvisuallight.Anythingaboveabsolutezero(-273.15degreesCelsiusor0degreesKelvin),radiatesintheinfrared.Evenicecube,snow,yourrefrigeratoremitinfrared.TheStefan-BoltzmannLaw,wherethetotalradiationenergyisproportionaltothefourthpoweroftheabsolutetemperatureandWienDisplacementLaw,theproductofthepeakwavelengthandthetemperatureisfoundtobeaconstant,areimplementedintheTNminfraredthermometermodule.TheinfraredradiationofmeasuretargetiscollectedbyainfraredmirrorthroughaIRfilterof5or8umcutinfrequencytotheinfraredthermopiledetector.ThedetectorsignalwillbeamplifiedanddigitalizebythelownoiseandhighlinearityOPandADconvertor.Theambienttemperaturesensor(usuallyincludedinthesamepackageasthethermopiledetector)issetinthespaceneartheopticalsystemtodetectthefastchangeoftheambienttemperature.Thesignalprocessingsectionreceivesthesignalsfromthesetemperaturesensorstocalculatethetargetsurfacetemperaturebyamathematicalalgorithm.TN9红外温度计模块