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1、DISTRIBUTEDTEMPERATURECONTROLTEMPERATUREMEASURINGSYSTEMBASEDONMULTI-SENSORDATAFUSIONAbstract:Temperaturecontrolsystemhasbeenwidelyusedoverthepastdecades.Inthispaper,ageneralarchitectureofdistributedtemperaturecontrolsystemisputforwardbasedonmulti-sensordata
2、fusionandCANbus.Anewmethodofmulti-sensordatafusionbasedonparameterestimationisproposedforthedistributedtemperaturecontrolsystem.Themajorfeatureofthesystemisitsgenerality,whichissuitableformanyfieldsoflargescaletemperaturecontrol.Experimentshowsthatthissyste
3、mpossesseshigheraccuracy,reliability,goodreal-timecharacteristicandwideapplicationprospectKeywords:Distributedcontrolsystem;CANbus;intelligentCANnode;multi-sensordatafusion.1.IntroductionDistributedtemperaturecontrolsystemhasbeenwidelyusedinourdailylifeandp
4、roduction,includingintelligentbuilding,greenhouse,constanttemperatureworkshop,[i]largeandmediumgranary,depot,andsoon.Thiskindofsystemshouldensurethattheenvironmenttemperaturecanbekeptbetweentwopredefinedlimits.Intheconventionaltemperaturemeasurementsystemsw
5、ebuildanetworkthroughRS-485Bususingasingle-chipmeteringsystembasedontemperaturesensors.Withtheaidofthenetwork,wecancarryoutcentralizedmonitoringandcontrolling.However,whenthemonitoringareaismuchmorewidespreadandtransmissiondistancebecomesfarther,thedisadvan
6、tagesofRS-485Busbecomemoreobvious.Inthissituation,thetransmissionandresponsespeedbecomeslower,theanti-interferenceabilitybecomesworse.Therefore,weshouldseekoutanewcommunicationmethodtosolvetheproblemsproducedbyRS-485Bus.Duringallthecommunicationmanners,thei
7、ndustrialcontrol-orientedfieldbustechnologycanensurethatwecanbreakthroughthelimitationoftraditionalpointtopointcommunicationmodeandbuilduparealdistributedcontrolandcentralizedmanagementsystem.Asaserialcommunicationprotocolsupportingdistributedreal-timecontr
8、ol,CANbushasmuchmoremeritsthanRS-485Bus,suchasbettererrorcorrectionability,betterreal-timeability,lowercostandsoon.Presently,ithasbeenextensivelyusedintheimplementationofdistributedmeasurementandcontro
