基于嵌入式ARM平台的远程IO数据采集系统的研究和开发..docx

基于嵌入式ARM平台的远程IO数据采集系统的研究和开发.

第一篇：基于嵌入式ARM平台的远程IO数据采集系统的研究和开发.ResearchandDevelopmentoftheRemoteI/ODataAcquisitionSystemBasedonEmbeddedARMPlatformINTRODUCTIONWiththewideuseofthenetworked,intelligentanddigitaldistributedcontrolsystem,thedataacquisitionsystembasedonthesingle-chipisnotonlylimitedinprocessingcapacity,butalsotheproblemofpoorreal-timeandreliability.Inrecentyears,withtherapiddevelopmentofthefieldofindustrialprocesscontrolandthefastpopularizationofembeddedARMprocessor,ithasbeenatrendthatARMprocessorcansubstitutethesingle-chiptorealizedataacquisitionandcontrol.EmbeddedARMsystemcanadapttothestrictrequirementsofthedataacquisitionsystem,suchasthefunction,reliability,cost,size,powerconsumption,andsoon.Inthispaper,anewkindofremoteI/OdataacquisitionsystembasedonARMembeddedplatformhasbeenresearchedanddeveloped,whichcanmeasureallkindsofelectricalandthermalparameterssuchasvoltage,current,thermocouple,RTD,andsoon.ThemeasureddatacanbedisplayedonLCDofthesystem,andatthesametimecanbetransmittedthroughRS485orEthernetnetworktoremoteDASorDCSmonitoringsystembyusingModbus/RTUorModbus/TCPprotocol.Thesystemhasthedualredundantnetworkandlong-distancecommunicationfunction,whichcanensurethedisturbrejectioncapabilityandreliabilityofthecommunicationnetwork.Thenewgenerationremotedataacquisitionandmoni-toringsystembasedonthehigh-performanceembeddedARMmicroprocessorhasimportantapplicationsignificance.STRUCTRUEDESIGNOFTHEWHOLESYSTEMThewholestructurechartoftheremotedataacquisitionandmonitoringsystembasedonembeddedARMplatformisshowninFigure1.Intheschemeofthesystem,theremoteI/OdataacquisitionmodulesaredevelopedbyembeddedARMprocessor,whichcanbewidelyusedtopersifiedindustriessuchaselectricpower,petroleum,chemical,metallurgy,steel,transportationandsoon.Thissystemismainlyusedfortheconcentrativeacquisitionanddigitalconversionofavarietyofelectricalandthermalsignalssuchasvoltage,current,thermalresistance,thermo-coupleintheproductionprocess.ThentheconverteddatacanbedisplayedontheLCDdirectly,andalsoca