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1、学院自动化与电气工程学院自动控制Component-basedSafetyComputerofRailwaySignalInterlockingSystemIntroductionSignalInterlockingSystemisthecriticalequipmentwhichcanguaranteetrafficsafetyandenhanceoperationalefficiencyinrailwaytransportation.Foralongtime,thecorecontrolcomputeradoptsininter
2、lockingsystemisthespecialcustomizedhigh-gradesafetycomputer,forexample,theSIMISofSiemens,theEI32ofNipponSignal,andsoon.Alongwiththerapiddevelopmentofelectronictechnology,thecustomizedsafetycomputerisfacingseverechallenges,forinstance,thehighdevelopmentcosts,poorusabili
3、ty,weakexpansibilityandslowtechnologyupdate.Toovercometheflawsofthehigh-gradespecialcustomizedcomputer,theU.S.DepartmentofDefensehasputforwardtheconcept：weshouldadoptcommercialstandardstoreplacemilitarynormsandstandardsformeetingconsumers5demand[1].Inthemeantime,therea
4、reseveralexplorationsandpracticesaboutadoptingopensystemarchitectureinavionics.TheUnitedStatedandEuropehavedomuchresearchaboututilizingcost-effectivefault-tolerantcomputertoreplacethededicatedcomputerinaerospaceandothersafety-criticalfields.Inrecentyears,itisgraduallyb
5、ecominganewtrendthattheutilizationofstandardizedcomponentsinaerospace,industry,transportationandothersafety-criticalfields.RailwayssignalinterlockingsystemFunctionsofsignalinterlockingsystemThebasicfunctionofsignalinterlockingsystemistoprotecttrainsafetybycontrollingsi
6、gnalequipments,suchasswitchpoints,signalsandtrackunitsinastation,andithandlesroutesviaacertaininterlockingregulation.Sincethebirthoftherailwaytransportation,signalinterlockingsystemhasgonethroughmanualsignal,mechanicalsignal,relay-basedinterlocking,andthemodemcomputer-
7、basedInterlockingSystem.ArchitectureofsignalinterlockingsystemGenerally,theInterlockingSystemhasahierarchicalstructure.Accordingtothefunctionofequipments,thesystemcanbedividedtothefunctionofequipments;thesystemcanbedividedintothreelayersasshowninfigure1.Man-MachineInte
8、rfacelayerInterlockingsafetylayerImplementationlayerOutdoor/、equiptmentsFigure1ArchitectureofSignalInterlockingSystem
