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基于多数据融合传感器的分布式温度控制系统(中英文对照论文).doc

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基于多数据融合传感器的分布式温度控制系统(中英文对照论文).doc

DISTRIBUTEDTEMPERATURECONTROLSYSTEMBASEDONMULTISENSORDATAFUSIONABSTRACTTEMPERATURECONTROLSYSTEMHASBEENWIDELYUSEDOVERTHEPASTDECADESINTHISPAPER,AGENERALARCHITECTUREOFDISTRIBUTEDTEMPERATURECONTROLSYSTEMISPUTFORWARDBASEDONMULTISENSORDATAFUSIONANDCANBUSANEWMETHODOFMULTISENSORDATAFUSIONBASEDONPARAMETERESTIMATIONISPROPOSEDFORTHEDISTRIBUTEDTEMPERATURECONTROLSYSTEMTHEMAJORFEATUREOFTHESYSTEMISITSGENERALITY,WHICHISSUITABLEFORMANYFIELDSOFLARGESCALETEMPERATURECONTROLEXPERIMENTSHOWSTHATTHISSYSTEMPOSSESSESHIGHERACCURACY,RELIABILITY,GOODREALTIMECHARACTERISTICANDWIDEAPPLICATIONPROSPECTKEYWORDSDISTRIBUTEDCONTROLSYSTEM;CANBUS;INTELLIGENTCANNODE;MULTISENSORDATAFUSION1INTRODUCTIONDISTRIBUTEDTEMPERATURECONTROLSYSTEMHASBEENWIDELYUSEDINOURDAILYLIFEANDPRODUCTION,INCLUDINGINTELLIGENTBUILDING,GREENHOUSE,CONSTANTTEMPERATUREWORKSHOP,LARGEANDMEDIUMGRANARY,DEPOT,ANDSOON1THISKINDOFSYSTEMSHOULDENSURETHATTHEENVIRONMENTTEMPERATURECANBEKEPTBETWEENTWOPREDEFINEDLIMITSINTHECONVENTIONALTEMPERATUREMEASUREMENTSYSTEMSWEBUILDANETWORKTHROUGHRS485BUSUSINGASINGLECHIPMETERINGSYSTEMBASEDONTEMPERATURESENSORSWITHTHEAIDOFTHENETWORK,WECANCARRYOUTCENTRALIZEDMONITORINGANDCONTROLLINGHOWEVER,WHENTHEMONITORINGAREAISMUCHMOREWIDESPREADANDTRANSMISSIONDISTANCEBECOMESFARTHER,THEDISADVANTAGESOFRS485BUSBECOMEMOREOBVIOUSINTHISSITUATION,THETRANSMISSIONANDRESPONSESPEEDBECOMESLOWER,THEANTIINTERFERENCEABILITYBECOMESWORSETHEREFORE,WESHOULDSEEKOUTANEWCOMMUNICATIONMETHODTOSOLVETHEPROBLEMSPRODUCEDBYRS485BUSDURINGALLTHECOMMUNICATIONMANNERS,THEINDUSTRIALCONTROLORIENTEDFIELDBUSTECHNOLOGYCANENSURETHATWECANBREAKTHROUGHTHELIMITATIONOFTRADITIONALPOINTTOPOINTCOMMUNICATIONMODEANDBUILDUPAREALDISTRIBUTEDCONTROLANDCENTRALIZEDMANAGEMENTSYSTEMASASERIALCOMMUNICATIONPROTOCOLSUPPORTINGDISTRIBUTEDREALTIMECONTROL,CANBUSHASMUCHMOREMERITSTHANRS485BUS,SUCHASBETTERERRORCORRECTIONABILITY,BETTERREALTIMEABILITY,LOWERCOSTANDSOONPRESENTLY,ITHASBEENEXTENSIVELYUSEDINTHEIMPLEMENTATIONOFDISTRIBUTEDMEASUREMENTANDCONTROLDOMAINSWITHTHEDEVELOPMENTOFSENSORYTECHNOLOGY,MOREANDMORESYSTEMSBEGINTOADOPTMULTISENSORDATAFUSIONTECHNOLOGYTOIMPROVETHEIRPERFORMANCESMULTISENSORDATAFUSIONISAKINDOFPARADIGMFORINTEGRATINGTHEDATAFROMMULTIPLESOURCESTOSYNTHESIZETHENEWINFORMATIONSOTHATTHEWHOLEISGREATERTHANTHESUMOFITSPARTS345ANDITISACRITICALTASKBOTHINTHECONTEMPORARYANDFUTURESYSTEMSWHICHHAVEDISTRIBUTEDNETWORKSOFLOWCOST,RESOURCECONSTRAINEDSENSORS2DISTRIBUTEDARCHITECTUREOFTHETEMPERATURECONTROLSYSTEMTHEDISTRIBUTEDARCHITECTUREOFTHETEMPERATURECONTROLSYSTEMISDEPICTEDINTHEFIGURE1ASCANBESEEN,THESYSTEMCONSISTSOFTWOMODULESSEVERALINTELLIGENTCANNODESANDAMAINCONTROLLERTHEYAREINTERCONNECTEDWITHEACHOTHERTHROUGHCANBUSEACHMODULEPERFORMSITSPARTINTOTHEDISTRIBUTEDARCHITECTURETHEFOLLOWINGISABRIEFDESCRIPTIONOFEACHMODULEINTHEARCHITECTURE3.1MAINCONTROLLERASTHESYSTEM’SMAINCONTROLLER,THEHOSTPCCANCOMMUNICATEWITHTHEINTELLIGENTCANNODESITISDEVOTEDTOSUPERVISEANDCONTROLTHEWHOLESYSTEM,SUCHASSYSTEMCONFIGURATION,DISPLAYINGRUNNINGCONDITION,PARAMETERINITIALIZATIONANDHARMONIZINGTHERELATIONSHIPSBETWEENEACHPARTWHAT’SMORE,WECANPRINTORSTORETHESYSTEM’SHISTORYTEMPERATUREDATA,WHICHISVERYUSEFULFORTHEANALYSISOFTHESYSTEMPERFORMANCE32INTELLIGENTCANNODEEACHINTELLIGENTCANNODEOFTHETEMPERATURECONTROLSYSTEMINCLUDESFIVEUNITSMCUASINGLECHIP,A/DCONVERSIONUNIT,TEMPERATUREMONITORINGUNITSENSORGROUP,DIGITALDISPLAYUNITANDACTUATORSACOOLINGUNITANDAHEATINGUNITTHEOPERATINGPRINCIPLEOFTHEINTELLIGENTCANNODEISDESCRIBEDASFOLLOWSINTHEPRACTICALAPPLICATION,WEDIVIDETHEREGIONOFTHECONTROLOBJECTIVEINTOMANYCELLS,ANDLAYTHEINTELLIGENTCANNODESINSOMEOFTHETYPICALCELLSINEACHNODE,MCUCOLLECTSTEMPERATUREDATAFROMTHETEMPERATUREMEASUREMENTSENSORGROUPSWITHTHEAIDOFTHEA/DCONVERSIONUNITSIMULTANEOUSLY,ITPERFORMSBASICDATAFUSIONALGORITHMSTOOBTAINAFUSIONVALUEWHICHISMORECLOSETOTHEREALONEANDTHEDIGITALDISPLAYUNITDISPLAYSTHEFUSINGRESULTOFTHENODETIMELY,SOWECANUNDERSTANDTHEENVIRONMENTTEMPERATUREINEVERYCONTROLCELLSEPARATELYBYCOMPARINGTHEFUSIONVALUEWITHTHESETONEBYTHEMAINCONTROLLER,THEINTELLIGENTCANNODECANIMPLEMENTTHEDEGENERATIVEFEEDBACKCONTROLOFEACHCELLTHROUGHENABLINGTHECORRESPONDINGHEATINGORCOOLINGDEVICESIFTHEFUSIONRESULTISBIGGERTHANTHESETVALUEINTHESPECIALINTELLIGENTCANNODE,THECOOLINGUNITWILLBEGINTOWORKONTHECONTRARY,IFTHEFUSIONRESULTISLESSTHANTHESETVALUEINTHENODETHEHEATINGUNITWILLBEGINTOWORKBYTHISMEANSWECANNOTONLYMONITORTHEENVIRONMENTTEMPERATURE,BUTALSOCANMAKETHECORRESPONDINGACTUATORWORKSOASTOREGULATETHETEMPERATUREAUTOMATICALLYATTHESAMETIMEEVERYCANNODEISABLETOSENDDATAFRAMETOTHECANBUSWHICHWILLNOTIFYTHEMAINCONTROLLERTHETEMPERATUREVALUEINTHECELLSOTHATCONTROLLERCANCONVENIENTLYMAKEDECISIONSTOMODIFYTHEPARAMETERORNOTSINCETHECANNODESCANREGULATETHETEMPERATUREOFTHECELLWHERETHEYARE,THETEMPERATUREINTHEWHOLEROOMWILLBEKEPTHOMOGENEOUSWHAT’SMORE,WECANALSOCONTROLTHEINTELLIGENTNODEBYMODIFYINGTHETEMPERATURE’SSETTINGVALUEONTHEHOSTPCGENERALLY,THEPROCESSORSONTHESPOTARENOTGOODATCOMPLEXDATAPROCESSINGANDDATAFUSING,SOITBECOMESVERYCRITICALHOWTOCHOOSEASUITABLEDATAFUSIONALGORITHMFORTHESYSTEMINTHEPOSTERIORSECTION,WEWILLINTRODUCEADATAFUSIONMETHODWHICHISSUITABLEFORTHEINTELLIG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