精品仓库温湿度监控系统外文翻译.docx
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精品仓库温湿度监控系统外文翻译
仓库温湿度监控系统外文翻译
江汉大学毕业论文(设计)
外文翻译
姓名
学号
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、IC设计、EDA工具的发展,基于SOC的单片机应用系统设计会有较大的发展。
温度是一个基本的物理量,自然界中的一切过程无不与温度密切相关。
温度传