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1、外文原文SinglechipmicrocomputerandthedevelopmentofthetemperatureandhumiditysensorBorninthe1970ssinglechipmicrocomputer,andexperiencetheSCM,MCU,SOCthreephases.(1)SCMnamelySingleChipcomputerstage,mainistoseekoutthemonolithicformsoftheembeddedsystembestsystemstructure."Innovationm
2、ode"success,laidtheSCMandgeneralcomputercompletelydifferentdevelopmentroad.(2)MCUnamelyMicroController(MicroControllerUnit)stage,themaintechnologicaldevelopmentdirectionis:expandingmeetembeddedapplication,theobjectsystemrequirementsofvariousperipheralcircuitandinterfacecirc
3、uit,dashforwardshowitsobjecttheintelligentcontrolability.(3)MCUisembeddedsystemindependentdevelopmentway,toakeyfactortothedevelopmentofMCUstage,istoseekapplicationsystemonachipinthemaximizationofthesolution;Therefore,specialMCUdevelopmentnaturalformtheSOCtendency.Withmicroe
4、lectronicstechnology,ICdesign,EDAtoolsdevelopment,basedonthesinglechipmicrocomputerapplicationsystemSOCdesigncanhavelargerdevelopment.Temperatureisabasicphysicalquantities,everythinginnatureiscloselyrelatedwiththeprocessoftemperature.Thetemperaturesensoristheearliestdevelop
5、ment,themostwidelyusedkindofsensor.From17thcenturypeoplebegantousetemperaturemeasuring.Thetemperaturesensortherearefourmaintypes:thermocouple,thermalresistance,resistancetemperaturedetector(RTD)andtemperaturesensorIC.ICtemperaturesensorandincludinganalogoutputanddigitaloutp
6、uttwotypes.Contacttemperaturesensordetectionpartandthetestedobjecthasagoodcontact,andcallsthethermometer.Thethermometerthroughthetransmissionorconvectionreachthermalequilibrium,thusmakethethermometerandvaluecanbemeasureddirectlysaysthetemperatureoftheobjects.Generalmeasurem
7、entprecision.Inacertaintemperaturerange,thethermometercanalsobemeasuringobjectsofinternaltemperaturedistribution.Butforsportsbody,smalltargetorheatcapacityisverysmallobjectswillproducelargermeasurementerror,commonlyusedathermometerhavetwo-metalthermometer,glassliquidthermom
8、eter,pressuretypethermometer,resistancethermometers,thermistorsandtemperaturediffe
