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1、无锡职业技术学院毕业设计说明书(英文翻译)英文翻译TemperaturehumiditysensorThesensorintypemanysensors,thetemperaturesensorandappliestwoaspectsinitsoutputbothissecondtoandwithitcorrelationtemperatureisanimportantphysicalparameter,heaffectsallphysical,chemistryandbiomedicinepro
2、cessmarch,regardlessofintheindustry,theagriculture,thescientificresearch,thenationaldefenseandpeople'sdailylifeeachaspect,thetemperaturesurveyandthecontrolallistheextremelyimportantwiththeelectronictechnologyandthematerialssciencedevelopment,toeachkin
3、dofnewthermalelementandthetemperaturesensorrequeststructureadvanced,theperformanceisstable,satisfiesthemoreandmorehighrequestwhichproposedtothetemperaturesurveyandthecontrol.SensorclassificationcarriesonclassifiedresistancetypePNaccordingtothemanufact
4、uretemperaturesensormaterialandtheprincipleofworktotiethetypethermoelectricitytyperadiationformularoperatingregionisreferstotheresistancevaluetohavetheremarkablechangetemperaturesensoralongwiththetemperaturechange,itmaytransformdirectlythetemperaturea
5、stheelectricaltheoperatingtemperaturescope,itsresistancethewhichincreasesalongwiththetemperatureascensioniscalledpositivetemperaturecoefficient(PTC);Itsresistancenumberthewhichreducesalongwiththetemperaturetascensioniscallednegativetemperature(NTC);Th
6、enegativetemperaturewhichreducessuddenlyalongwiththetemperatureriseiscalledcritical(CTR)inawarmareainternalresistance.1.PTCprincipleofthePTCrusuallytousethe(BaTio3)ceramicmaterial,thepureBaTio3ceramicshavetheextremelyhighelectronicresistivityunderofte
7、nthetemperature,above108Ω·m,thereforeistheinsulator.IfcarriesonthedopinginBaTio3,maycausetheBaTio3semiconductor,forexample:Mixesby0.1%----0.3%rare-earthelement,butcausesittobecomehas0.1underthenormaltemperature----10Ω·mNlineofsemiconductors.Haselectri
8、citysemiconductorBaTio3,whenthetemperatureachievedwhenCurietemperatureT,ittransformsbythetetragonalsystemintothecubicsystem,thistimeitselectronicresistivityleapincreasesseveralmagnitudes(103-----107times).Positivetemperaturecoefficientthe(PTC)