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BIMBASEDINTEGRATEDDELIVERYTECHNOLOGIESFORINTELLIGENTMEPMANAGEMENTINTHEOPERATIONANDMAINTENANCEPHASEZHENZHONGHU1,2,PEILONGTIAN1,XIAOYANGZHANG1,SUNWEILI2,JIANPINGZHANG11DEPARTMENTOFCIVILENGINEERING,TSINGHUAUNIVERSITY,BEIJING100084,CHINA2GRADUATESCHOOLATSHENZHEN,TSINGHUAUNIVERSITY,SHENZHEN518055,CHINAABSTRACTINCOMPLETEBUILDINGINFORMATIONINDELIVERYANDTHELACKOFCOMPATIBLETOOLSFOROPERATIONANDMAINTENANCEOBIMASBUILTOPERATIONANDMAINTENANCEFACILITYMANAGEMENT1INTRODUCTIONINBUILDINGS,THEMECHANICAL,ELECTRICALANDPLUMBINGMEPENGINEERINGSERVESDIRECTLYFORPEOPLESDAILYNEEDS,ANDHENCEPLAYSACRITICALROLEINCREATINGACOMFORTABLEANDSAFEENVIRONMENTFORBUILDINGOCCUPANTSMEPENGINEERINGISAGENERALTERMREFERRINGTOTHEMANAGEMENTOFNONSTRUCTURALFUNCTIONSOFABUILDING,WHICHINCLUDESPLUMBING,HEATING,VENTILATIONANDAIRCONDITIONINGHVAC,ELECTRICITY,ENERGYCONSERVATIONANDELEVATORMAINTENANCE,ETCINFACT,MEPENGINEERINGCONCERNSTHEFULLLIFECYCLEOFANYMEPSUBSYSTEM,INCLUDINGTHEDESIGN,CONSTRUCTION,OPERATIONANDMAINTENANCEOBVALVESINCLUDINGGATEVALUE,GLOBEVALVEANDCHECKVALVECVALVESINCLUDINGBUTTERFLYVALVE,GATEVALVEANDGLOBEVALVE2FORCOMPONENTSOFTHESAMETYPE,AGEOMETRICALSIMILARITYANALYSISISCONDUCTEDTOFINDCOMPONENTSWITHSIMILARGEOMETRIESTHEGEOMETRICALLYSIMILARCOMPONENTSARETHENASSIGNEDTOTHESAMELOGICLAYERFORFURTHERSUBDIVISION3THEORIENTEDBOUNDINGBOXOBBALGORITHM,WITHTHEHELPOFENDSECTIONANALYSIS,ISADOPTEDTOIDENTIFYSPATIALCONNECTIONSOFVARIOUSCOMPONENTSFORGROUPSCONTAININGINTEGRATEDCOMPONENTS,DIFFERENTPARTSOFTHEINTEGRATEDCOMPONENTAREEITHERASSIGNEDTOTHESAMELOGICLAYERORAUTOMATICALLYFORMULATETHELOGICCHAINBASEDONTHECOMPONENTTYPEORTHESUBDIVISIONOFTHECOMPONENTGROUPASFORTHECREATIONOFOBB,CHANANDTAN42PROPOSEDAMETHODFORGENERATINGAMINIMUMOBBBYPROJECTINGTHE3DOBJECTSTOITSTHREEPRINCIPLEPLANESTHEOBBISTHENCREATEDBASEDONTHEPROJECTEDCONTOURSTHEOBBCREATEDHENCEFITSTHE3DMODELTOTHELARGESTEXTENTTHEREFORE,CHANANDTANSMETHODISSUITABLEFORDISCERNINGSPATIALCONNECTIONSINAMEPSUBSYSTEMCONTAININGALARGENUMBEROFLONGPIPESEITHERSQUARESECTIONEDORROUNDSECTIONEDINORDERTOPICTURESPATIALCONNECTIONSOFCOMPONENTS,THECREATEDOBBISUSEDTORUNCOLLISIONTESTFORANYPAIROFCOMPONENTSIFCOLLISIONISNOTDETECTEDFORAPARTICULARPAIR,THEREISNOCHANCETHESETWOCOMPONENTSARESPATIALLYCONNECTEDIFACOLLISIONISDETECTED,ONTHEOTHERHAND,ANENDSECTIONANALYSISISCONDUCTEDTOVERIFYIFTHESETWOCOMPONENTSARESPATIALLYCONNECTEDINDETAIL,THEENDSECTIONSOFCOMPONENTSAREEXTRACTEDTODETECTIFAFACEOFONECOMPONENTISCOLLOCATEDWITHANYFACEOFTHEOTHERCOMPONENTINDETAIL,THEENDSECTIONANALYSISISCONDUCTEDINTWOSTEPS1BECAUSEABREP3DMODELEXTERNALLYPROFILINGTHECOMPONENTCONTAINSALLEDGESHARINGTRIANGLESANYTWOTRIANGLESSHAREONEEDGE,THEANGLESBETWEENTHENORMALVECTORSOFANYTWOTRIANGLESCANBECHECKEDTOFINDTHEEDGEOFTHEENDSECTIONSPECIFICALLY,WHENTHEANGLEISLARGERTHANACRITICALVALUEFOREXAMPLE,ONEOFTHETWO60TRIANGLESISDETERMINEDTOBEPARALLELTOTHEENDSECTION,ANDPUTINTOTHECANDIDATEDATABASEAFTERTHEEXAMINATIONOFTHEANGLESBETWEENNORMALVECTORS,ALLTHETRIANGLESINTHECANDIDATEDATABASEPARALLELTOTHESAMEPLANEARESELECTEDTOFORMTHEPOSSIBLEENDSECTION2ALLTRIANGLESCONSTITUTINGAPOSSIBLEENDSECTIONSHOULDGOTHROUGHACONTINUITYCHECKSPECIFICALLY,IFALLPOINTSSHAREASAMEPLANE,THEPOSSIBLEENDSECTIONISDETERMINEDTOBECONTINUOUSANDTHETWOCOMPONENTSARERECOGNIZEDASSPATIALLYCONNECTED2MECHANISMOFTHEEQUIPMENTIDENTIFICATIONANDGROUPINGAFTERCREATINGTHELOGICCHAINOFTHEMEPSUBSYSTEMS,THELOGICCHAIN,TOGETHERWITHTHEBASICINFORMATION,OFEQUIPMENTCANBERECORDEDINTHERFIDTAGSOR2DBARCODE,WHICHENABLESTHEQUICKASSESSOFUSEFULINFORMATIONINTHEODRAWINGAPOLYGONSHAPEDPATHALONGTHEHALLBOUNDARY,DENOTINGEVERYDOORONTHEPATHASNODESGENERATINGTWONODESATTHEENDSOFTHEHALLWAYANDCONNECTINGTHENODESTOFORMULATETHEHALLWAYPATHCONNECTINGTHEHALLWAYENDNODETOTHENEARESTNODEINTHEHALLIFTHEHALLWAYISCONNECTEDTOTHEHALLGENERATINGNODESATEVERYROOMDOORSANDCONNECTINGTHEDOORNODETOTHENODEBELONGINGTOEITHERTHEHALLORTHEHALLWAYGENERATINGNODESATEVERYSTAIRENTRY/EXISTORTHEELEVATORTOFORMULATECONNECTIONSBETWEENTWOLAYERSTHEVALUESOFINDOORPATHWEIGHTSAREASSIGNEDTOSIMULATETHEACTUALPEDESTRIANCIRCUMSTANCE,WHICHTAKESBOTHTHEPATHLENGTHANDMARCHINGSPEEDINTOCONSIDERATIONINFACT,THEWEIGHTVALUEISCALCULATEDAS,1LENGTHK1,HORIZONTALPATHLENGTHK2,HORIZONTALPATHLENGTHK3C,ELEVATORPATHINEQUATION1,K1,K2ANDK3REPRESENTFORTHEMARCHINGSPEEDINASINGLEFLOOR,GOINGTHROUGHSTAIRS,ANDBYELEVATOR,RESPECTIVELY,ANDCISACONSTANTCOUNTINGFORTHEELEVATORACCELERATION,DECELERATIONANDWAITINGTIME4OPERATIONMANAGEMENTBASEDONWEBSERVICEANDHETEROGENEOUSPLATFORMTHEOSHARINGTHEINFORMATIONINTERFACEWITHCOMMONPROPERTYMANAGEMENTTOOLSSUCHASBUILDINGAUTOMATIONSYSTEMBASREPORTOFFAILURESINCLUDINGTHEMANUALREPORTANDAUTOMATICREPORTTHEMANUALREPORTREQUIRESTHEEQUIPMENTKEEPERTOMANUALLYINPUTTHERELEVANTINFORMATION,SUCHASTHENAME,THECODEANDTHECONDITIONOFTHEEQUIPMENTAUTOMATICREPORTREQUIRESCONTINUOUSLYMONITORINGOFPARTICULAREQUIPMENT,BYVARIOUSSENSORS,THROUGHINTEGRATINGWITHTHEBASFORANOTHERTHING,THEPORTABLETERMINAL,WITHINAWIFIENABLEDENVIRONMENT,ISSUITABLEFORASSIGNINGTHEREPAIRWORK,UPDATINGTHEKNOWLEDGELIBRARYANDKEEPINGTHEREPAIRLOGINDETAIL,THEPROPERTYMANAGERCOULDBEINFORMEDABOUTTHEEQUIPMENTFAILUREVIAPORTABLETERMINALS,ANDASSIGNAPROPE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