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1、.ResearchandDevelopmentoftheRemoteI/ODataAcquisitionSystemBasedonEmbeddedARMPlatformINTRODUCTIONWiththewideuseofthenetworked,intelligentanddigitaldistributedcontrolsystem,thedataacquisitionsystembasedonthesingle-chipisnotonlylimitedinprocessingcapacity,butalsotheproblemofpoorreal-timeand
2、reliability.Inrecentyears,withtherapiddevelopmentofthefieldofindustrialprocesscontrolandthefastpopularizationofembeddedARMprocessor,ithasbeenatrendthatARMprocessorcansubstitutethesingle-chiptorealizedataacquisitionandcontrol.EmbeddedARMsystemcanadapttothestrictrequirementsofthedataacquis
3、itionsystem,suchasthefunction,reliability,cost,size,powerconsumption,andsoon.Inthispaper,anewkindofremoteI/OdataacquisitionsystembasedonARMembeddedplatformhasbeenresearchedanddeveloped,whichcanmeasureallkindsofelectricalandthermalparameterssuchasvoltage,current,thermocouple,RTD,andsoon.T
4、hemeasureddatacanbedisplayedonLCDofthesystem,andatthesametimecanbetransmittedthroughRS485orEthernetnetworktoremoteDASorDCSmonitoringsystembyusingModbus/RTUorModbus/TCPprotocol.Thesystemhasthedualredundantnetworkandlong-distancecommunicationfunction,whichcanensurethedisturbrejectioncapabi
5、lityandreliabilityofthecommunicationnetwork.Thenewgenerationremotedataacquisitionandmoni-toringsystembasedonthehigh-performanceembeddedARMmicroprocessorhasimportantapplicationsignificance.STRUCTRUEDESIGNOFTHEWHOLESYSTEMThewholestructurechartoftheremotedataacquisitionandmonitoringsystemba
6、sedonembeddedARMplatformisshowninFigure1.Intheschemeofthesystem,theremoteI/OdataacquisitionmodulesaredevelopedbyembeddedARMprocessor,whichcanbewidelyusedtodiversifiedindustriessuchaselectricpower,petroleum,chemical,metallurgy,steel,transportationandsoon.Thissystemismainlyusedfortheconcen
7、trativeacquisitionanddigitalconversionofa...varietyofelectricalandthermalsignalssuchasvoltage,current,thermalresistance,thermo-coupleintheproductionprocess.ThentheconverteddatacanbedisplayedontheLCDdirectly,andalsocanbesenttotheembeddedcontrollerthroughRS485orEthernetnetw
