仓库温湿度监控系统外文翻译.docx

仓库温湿度监控系统外文翻译.docx

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江汉大学毕业论文（设计）

外文翻译

姓名

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2012年3月1日

外文原文

Singlechipmicrocomputerandthedevelopmentofthetemperatureandhumiditysensor

Borninthe1970ssinglechipmicrocomputer,andexperiencetheSCM,MCU,SOCthreephases.

（1）SCMnamelySingleChipcomputerstage,mainistoseekoutthemonolithicformsoftheembeddedsystembestsystemstructure."Innovationmode"success,laidtheSCMandgeneralcomputercompletelydifferentdevelopmentroad.

（2）MCUnamelyMicroController（MicroControllerUnit）stage,themaintechnologicaldevelopmentdirectionis:

expandingmeetembeddedapplication,theobjectsystemrequirementsofvariousperipheralcircuitandinterfacecircuit,dashforwardshowitsobjecttheintelligentcontrolability.

（3）MCUisembeddedsystemindependentdevelopmentway,toakeyfactortothedevelopmentofMCUstage,istoseekapplicationsystemonachipinthemaximizationofthesolution;Therefore,specialMCUdevelopmentnaturalformtheSOCtendency.Withmicroelectronicstechnology,ICdesign,EDAtoolsdevelopment,basedonthesinglechipmicrocomputerapplicationsystemSOCdesigncanhavelargerdevelopment.

Temperatureisabasicphysicalquantities,everythinginnatureiscloselyrelatedwiththeprocessoftemperature.Thetemperaturesensoristheearliestdevelopment,themostwidelyusedkindofsensor.From17thcenturypeoplebegantousetemperaturemeasuring.Thetemperaturesensortherearefourmaintypes:

thermocouple,thermalresistance,resistancetemperaturedetector（RTD）andtemperaturesensorIC.ICtemperaturesensorandincludinganalogoutputanddigitaloutputtwotypes.Contacttemperaturesensordetectionpartandthetestedobjecthasagoodcontact,andcallsthethermometer.Thethermometerthroughthetransmissionorconvectionreachthermalequilibrium,thusmakethethermometerandvaluecanbemeasureddirectlysaysthetemperatureoftheobjects.Generalmeasurementprecision.Inacertaintemperaturerange,thethermometercanalsobemeasuringobjectsofinternaltemperaturedistribution.Butforsportsbody,smalltargetorheatcapacityisverysmallobjectswillproducelargermeasurementerror,commonlyusedathermometerhavetwo-metalthermometer,glassliquidthermometer,pressuretypethermometer,resistancethermometers,thermistorsandtemperaturedifferenceelectricdipole,etc.Contactlesstemperaturesensorsensitivecomponentsandtestedobjecteachotherisnotcontact,againsaynon-contacthighlighted.ittable.Thisinstrumentcanbeusedtomeasuremovementobject,smallgoalsandheatcapacitysmallortemperaturechangequickly（transient）thesurfacetemperatureoftheobject,alsocanusedforthemeasurementofthetemperaturedistribution.

1.AT89S52devicesprofile

Themainperformance:

andMCS-51SCMproductscompatible,and8KbytesinthesystemprogrammableFlashmemory,1000timeperiod,andthestaticintegration.itoperation:

0Hz~33Hz,level3encryptionprogrammemory,32programmableI/Omouthline,three16timer/counters,eightinterruptsource,full-duplexUARTserialchannel,lowpowerdissipationpowerlostmode,andfreeafterpoweroffinterruptcanwakeup,thewatchdogtimer,doubledatapointer,offtheidentifier.

Functionalcharacteristicsdescription:

AT89S52devicesisalowpower,high-performanceCMOS8-bitmicrocontrollers,with8KinsystemprogrammableFlashmemory.Atmelcompanyusehigh-densitynonvolatiletechnologymanufacturing,andindustry80C51productinstructionsandpinfullycompatible.ChipFlashallowprogrammemoryinthesystemprogrammable,alsosuitableforconventionalprogrammingconsole.Inasinglechip,withclever8bitsCPUandinthesystemprogrammableFlash,makeAT89S52devicesformanyembeddedcontrolsystemtoprovidehighflexibleapplication,superefficientsolution.AT89S52deviceshasthefollowingstandardfunction:

8kbytesFlash,256bytesRAM,32bitI/Omouthline,thewatchdogtimer,twodatapointer,three16timer/counter,a6vectorlevel2interruptstructure,full-duplexserialmouth,withincrystalsoftimelyclockcircuit.Inaddition,AT89S52devicescanbedownto0Hzseriesstaticlogicoperation,supporttwosoftwarecanchoosepowersavingmode.Idlemode,theCPUtostopworking,andallowRAM,timer/counter,serialports,interruptcontinuetoworkfor.Powerlostprotectionways,aRAMcontentbeingsaved,hasbeenfrozen,SCMallworkstop,untilthenextaninterruptorhardwareresetsofar.

2.IntegratedtemperaturesensorAD590

IntegratedtemperaturesensorAD590to,itstemperatureresolutionforthe0.3degreesCelsius.TheanalogsignalisoutputAD590to,whenthetemperatureof0degrees,outputcurrent273.2microamps,andcurrentvariationandtemperaturevariationinalinearrelationship,temperature,andonceeverychange,theoutputcurrentchange1microamps,thetemperaturesensorofworkingtemperaturerangeis-30degrees-150degrees.IfuseAD590tomakethetemperaturesensor,sensorperipheralcircuitissimple,justputsamplingresistanceandAD590tolinkandthentoamplifythesignal,andthenusingvoltagecomparatorcomparedtooutputvoltage,voltagecomparatoroutputsignalscanbedirectlyasPLCtheinputsignal.

3.Humiditysensor

Therearemanywaysofmeasuringtheairhumidity,itsprincipleisbasedoncertainmaterialfromthesurroundingairabsorbwatercausedbyphysicalorchemicalpropertiesofthechange,indirectlyfromthematerialofwaterquantityandthesurroundingairhumidity.Capacitiveandresistiveandwetgoupwettypeaccordingtoitsoriginalsusceptibilityweremacromoleculematerialmoistureabsorptionafterthedielectricconstantandresistivityandvolumechangeandhumiditymeasurement

Solutiona:

theHOS-201wetsensors.HOS-201wetsensorforhighhumiditysensorswitches,it'sthejobofthevoltageofac1Vthefollowing,frequencyforfrequency50HZ~1KHZ,humiditymeasurementrangeof0~100%RH,workingtemperaturerangeis0~50℃,impedancein75%RH（25℃）for1MΩ.Thesensorisusedtoswitchthesensor,notonthewidebandrangedetectionhumidity,therefore,mainlyforthejudgmentorundermorethane.humiditylevel.However,thesensortoacertainrange,haveagooduseofthelinear,andcanbeeffectivelyusingthelinearcharacteristics.

Schemeii:

theHS1100/HS1101humiditysensor.HS1100/HS1101capacitancesensor,inacircuitofequivalenttoacapacitor,ithasthecapacityastheairhumidityincreaseswhile.Donotneedtocompleteinterchangeabilityofcalibration,highreliabilityandlong-termstability,fastresponsetime,patentdesignofsolidpolymerstructure,thetopcontact（HS1100）andlateralcontact（HS1101）twokindsofpackagingproducts,applytolinearoutputvoltageandfrequencyoutputtwocircuit,issuitableformakingautomaticassemblylineofthepluginandautomaticassemblyprocess,etc.

Relativehumidityat1%-100%RHrange;Thecapacitytochangeby16pF200pF,theerrorisnotmorethanplusorminus2%RH;Responsetimelessthan5S;Thetemperaturecoefficientis0.04pF/℃.Visibleishigheraccuracy.

Acomprehensivecomparisonofschemeandschemeii,planonealthoughmeettheprecisionandtherequirementsofthemeasurehumidityrange,butitslimitedtocertainscope,haveagooduseofthelinear,andcanbeeffectivelyusingthelinearcharacteristics.Andstilldonothaveinthisdesignsystemoftemperature-30to50℃request,sowechosethisdesignasthesecondschemehumiditysensor.

4.MC14433A/Dconverter

MC14433isthreeandAhalfdoubleintegraltypeoftheA/Dconverter,withhighprecision,goodanti-jammingperformanceadvantages,itsshortcomingisconversionratelow,about1-10times/SEC.Withouttherequirementofhighspeedswitchingoccasions,forexample,inlowspeeddataacquisitionsystem,iswidelyused.MC14433Aa/Dconverteranddomesticproduct5G14433areallthesame,canbeinterchanged.

5.Theresearchsignificance

ThecollectionoftemperatureandhumiditymonitoringindailylifehasawiderangeofUSES,thetemperatureandhumiditymonitorbasedonthisanddesign,thebiggestadvantageisthatitcandisplaythecurrenttemperatureandhumiditymeasurement,andthecurrenttemperatureandpresettemperaturecarriesonthecomparison,morethanwhenthecurrenttemperatureandhumiditypresettemperaturealarm,realizethehistoricaldatamonitoring,collectionandanalysispurposes.Thetemperatureandhumiditymonitoringalarmlowpowerconsumption,canusetheminimalresourcefordifferenttemperatureforhighprecisionmeasurement,reliableperformance,convenientoperationinformation,complexworkthroughsoftwareprogrammingtocomplete,easytogetresults,inactualusefortheidealeffect.Thisdesignhasrealizedtothereal-timecontrolofthetemperature,flexiblecontrolprecisionandreliability,high,canmeettheproductpreliminarytesttherequirementsoftheaging.Intheprocessingofconstanttemperatureandheatingtemperature,formedacompletesetofcontrolplan,cantransplantationforconstanttemperature,heatingthehouseandequipmentmanyaspects.Therefore,thisdesignresearchresultsandthedesignideacanbegoodinotherdesigntransplantation,diditandtheactualgoodunion,withstrongpracticalsignificance.

译文

单片机及温湿度传感器的发展

单片机诞生于20世纪70年代末，经历了SCM、MCU、SOC三大阶段。

（1）SCM即单片微型计算机（SingleChipMicrocomputer）阶段，主要是寻求最佳的单片形态嵌入式系统的最佳体系结构。

“创新模式”获得成功，奠定了SCM与通用计算机完全不同的发展道路。

（2）MCU即微控制器（MicroControllerUnit）阶段，主要的技术发展方向是：

不断扩展满足嵌入式应用时，对象系统要求的各种外围电路与接口电路，突显其对象的智能化控制能力。

（3）单片机是嵌入式系统的独立发展之路，向MCU阶段发展的重要因素，就是寻求应用系统在芯片上的最大化解决；因此，专用单片机的发展自然形成了SOC化趋势。

随着微电子技术、I