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Study_4 (2)

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Study_4 (2)

    Study

    JournalofDonghuaUniversity(Eng.Ed.)Vo1.22.No.5(2005)29 ;StudyofRemoteMonitoringandMaintenanceGuidingTechnique ;BasedonLabVIEWforMachiningCenters

    ;JIAZhi.cheng”,HUZhong.xiang,SHIXiao-jun?.

    ;1.FacultyofRemanufactureEngineering,AcademyofArmoredForcesEngineering,Beijing100072

    ;2.NationalKeyLaboratoryforFMS,Jilin,Changchun130012 ;Thevirtualinstruments(?s),asanewtypeofinstrument

    ;basedoffal,Ilter,hasmanyadvancedattractivecharacteristics. ;researchisbasedoffVIS.andbringsconditionmonUo~g ;andknowledge-basedmaintenancesupporttogetherthrough ;anintegrated(includingIntemet,ASP.NET,XMLtechnique, ;?S)networkmvinxmamt.tl1ifIthema1t,mmanmg

    ;centersoperators,engineersormanagerscansharereal?time ;datathroughthebrowser-basedinterfaceandminimize ;machiningcentersdowntimebyprovidingstatusmonitoring ;andremotemaintenanceguidingfromservicecenters. ;Keywords:remotemonitoring,machiningcenter,maintenance ;guiding,bvlEW,xM_L,ASP.NET

    ;Introduction

    ;Currentmanufacturingindustriesarefacingnew ;challenges.Computernumericalcontrol(CNC)machine ;toolsarefundamentalequipmentsforthemanufacturing ;industry.MachiningcentersaretypicalproductsofCNC ;machinetoolsandbdl1gopportunitiesforthemanufacturing ;industry.However,withtheseproductsgettingmoreand ;morecomplicated,theirfunctionsandadvancedcharacteristics ;can’tbemaintainedasaresultofincreasingunreliable

    ;fa:t0rs.Therefore.itisurgentlyrequiredtobringtraditional ;machiningcenterswithcombinedon.1inemonitoringand ;maintenanceguidingcapabilitysoastokeepmachining ;centersrunningwithhighreliability~.

    ;LabVW.asa

    ;newtypeofvirtualinstrumentbasedoncomputer,hassuch ;advantagesaspowerfulfunction,hilghaccuracyand ;friendlyman-machineinterface,especiallygreatflexibility ;outwitsconventionaliustruments.Mostbasically. ;LabVW’sDatasocketServerisasimpleandefficientway

    ;tobroadcastdataacrossanetwork.Itisidealforstreaming ;telemetryandenvironmentaldata.Anybasicorderived

    ;LabVIEWdatatypecanbewrittentoacentralDatasocket ;Serveronnetwork.Theserverallowsmultipleclientsto ;readthemostrecentvalueofanyhumberofrequested ;fields.Broadcastingeverythingpackedintoalongstring ;allowsuserstocustomizetheirstatusGUIsL..Hencethis ;monitoringsystemisbasedonLabVIEWsoftware,anditis ;tobringmachiningcenters,thedataacquisitionsystem, ;themeasuringdevices(sensors)andintelligentknowledge ;databasetogetherthroughanintegrated(includingthe

    ;Internet,web,ASP.NET,XMLtechnique,virtual ;instruments,andsensors)networkenvironment.Within ;theenvironment,machiningcentersoperators,engineers ;orshopfloormanagerscansharereal?timedatawitheach ;otherwhileperformingtheirowndutiesthroughthe ;browser?basedopenenvironment.

    ;Theobjectiveofthisresearchistodevelopan

    ;appropriatemethodologywithopenarchitectureforreal? ;timeremotemonitoringandaknowledge-basedmaintenance ;guidingsystemofmachiningcenters.Inthispaper,a ;frameworkandstrategyofremoteconditionmonitoring ;systemsbasedonLabVIEWisdesignedforthispurposeand ;anintelligentsystemwithopenarchitectureforon-line ;monitoringandmaintenanceguidinginmachiningcentersis ;developedbothinhardwareandsoftware.Ourgoalisto ;minimizemachiningcentersdowntimebyprovidingstatus ;monitoringforfactoriesandremotemaintenanceguiding ;fromservicecenters.

    ;AStrategicFrarreworkforRemoteCtx~ition

    ;MonitoringandMaintenarr~GuidingTechnique ;Systems

    ;Tofacilitateaweb-basedconditionmonitoring ;environment,applicationserversmustengageusersina ;graphicalinteractioninadditiontothedialog-likedata ;sharing,becauseremoteoperatorsincludingengineersand ;managersneedactiveandvisualhelptocoordinatetheir ;effortsinadistributedenvironment.Fortheabove ;purpose,theframeworkisdesignedtousethepopular ;Browser/Server(B/S)architectureandVIs~baseddesign ;pattern,whichuseinteractivegraph-basedvirtual ;instrumentsmodelsinsteadofbandwidth-consumingimages ;forprocessingstatusvisualizationandprovideusel’swith

    ;ReceivedJuly13,2005

    ;ThisworkwassupportedbyNationalKeyLaboratoryFoundationforFMSNo.51458100505JB3501

    ;Correspordenceshouldbeaddress~toJIAZhi-cheng,Dr.

;

    ;30JournalofDonghuaUniversity(Eng.Ed.)Vo1.22.No.5(2005) ;thinclientgraphicaluserinterfaceforremotemonitoring. ;Adataacquisition,processing,analysispresentation ;moduleiSdevelopedusingNationalInstrument’S(N1)Data

    ;Acquisition(DAQ)BoardandaLabVIEWsoftware ;package.Thegraphicalelements(dials,meters,andstrip ;char~)aredisplayedonthefrontpaneloftheVl(Virtual ;Instrument)developedwithLabVIEW.Thisapplication ;USeSNIDataSockettOsharelivedatawithother ;applicationsatagreater

    ;networkconnection.The

    ;datatransferratethrougha

    ;servicesideutilizesthelatest

    ;ASP.NETtechnologiesfortheimplementationofthe ;proposedarchitecture,duetOthefollowingadvantages: ;(1)itisarobust,general?purpose,high?levelprogramming ;language,andapowerfulsoftwareplatform(2)itis ;object.oriented.distributed,andmultithreaded;(3)itis ;easytOdevelopwebapplicationsbyusingC#,Active ;ServerPages(ASP).andJavaServerPages(JSP).For ;thesecurityreasons,theDatabaseConnectivitycomponent ;isdesignedtOseparatethelogicalandphysicalviewsof ;data.ItencapsulatesADOandSOLqueries,andprovides ;standardmethodsforaccessingdata(knowledgebaseof ;maintenance~icUng,orXM匝一docmnents).1_heknowledge

    ;baseisfoundformachiningcentertrouble.shooting,while ;XMLwillbeusedforhighleveldatacommunicationin

    ;futureextensions~.Theproposedsolutionscanmeet ;boththeuserrequirementsofrichreal?timevisualdata ;sharingandreducingnetworktraffic.

    ;Becausetheprocessesinrealtimerunningstatusof

    ;machiningcentersareverycomplex,involvingmany ;interactingparameters,asystematicsearchapproachwith ;aproperfeedbacksystemisvitalfordetectingtheproblem ;andprovidingthepropersolutionassoonaspossible.The ;expertmaynotbeavailableimmediatelytOattendtOthe ;problem,ortheorganizationmaynotevenhavea ;competentexpertforeveryproblemthatmayarise.Under ;pressureoftimeandlossofproduction,aquickresponse ;canplayanimportantroleinbringingthesystembacktO ;normal[一引.Thiscallsforanintelligentdiagnosisand ;Maintenanceguidingsystems,whichcanusehumanlike

    ;reasoningtOdiagnoseproblemsandprovideremedies.

    ;TheirabilitytOmanipulatedomain-specificknowledgeand ;howtOuseknowledgetocreateareasoningtree,tracing ;reasoningbackwardaswellasforward,needingonlya ;minorchangeintheknowledgebasetOadapttOnew ;situations,Thesystemframeworkcanbeconstructedin ;fourtiersasshowninFig.1.

    ;Fig.IFrameworkofsystemarchitecture

    ;

    ;JournalofDonghuaUniversity(Eng.Ed.)Vo1.22,No.5(2005)31 ;ImplementationoftheRemoteMonitoring

    ;andIVlaintenanceGuidingSystemDevel~t

    ;Environn.1ent

    ;1Selectionofmonitorsignalsanddesignof

    ;hardwareconfiguration

    ;Theon?linemonitoringsystemformachiningcenters ;presentsthedataacquisitionsystem,LabVWsoftware,

    ;andtheresultsmeasuredmachiningcentersstatus.The ;researchofthefaultmodesand便Aisafundamental

    ;assignmenttoascertainthemonitorsignalsofrunning ;machiningcenters.Itisthefirststeptoacquirethefault ;datafromthemachiningshopfloors,andthefault ;informationfromtheformoffaultrecor~isthedatabase ;offaultinformationformachiningcenters.Then.thefault ;positions,modes,andcausesareanalyzedbythesoftware ;Offaultanalyses,andthesituationoffaultoccurrencein ;generalisrealmed.Accordingtothedetailedanalysistothe ;partsandsubsystemofmachiningcentersinwhichthefault ;frequentlyoccur,themajorfaultmodesandweaklinksof ;machiningcenterscouldbedetermined,whichprovidesthe ;foundationtoascertainthemeasurablesignalsofcondition ;monitoringsystem.

    ;Basedondetailedanalysisofthemajorfaultmodes, ;tablesofmonitoringsignalandhardwareinformationtables ;areacquired,andhardwareconfigurationandinterfaceare ;setup.projectisdevelopedusingNationalIustrument’s

    ;(NI)DataAcquisition(DAQ)systemandLabVIEW ;softwarepackage.TheDAQsystemconsistsofsensors.a ;SCXIsignalconditioningdevice,aDAQBoardaswellas ;theirconnectingcable.SCXI?1349MIO-16Eisahigh? ;performancesignalconditioningandswitchingplatform. ;Whetheryouneedtomeasuresensorsorrawsignals, ;generatevoltagesorcurrents,monitordigitallines,or ;routesignalswithswitching,SCXI?1349MIO-16Eprovides ;asingle,integratedplatformforallofyoursignal

    ;conditioningandswitchingneeds.ASCXIsystemconsists ;ofmulti?channelsignalconditioningmodulesinstalledin ;oneormoreruggedchassis.Youcanchoosefromawide ;selectionofanaloginput,analogoutput,digitali/o,and ;switchingmodulestofityourapplicationneedsexactly. ;BecauseLab-PC-1200DAQboardprovidesreliable ;measurementsatalowprice,itisidealforawidevariety ;ofsimpleapplicationsinlaboratory,research,design ;verification/test,andmanufacturingtest.Lab-PC-1200 ;DAQboardincludesanalogoutput,staticdigitali/o,and ;counter/timerI/0operationsalongwithanaloginput ;acquisition.Thelow.cost16.bitDAQboardwithadditional ;features,higherperformance,andmoreexpandability ;optionsprovidesqualitymeasurementsandcomewithNI ;superiorsoftwareintegrationandsupport.IntheLaf??

    ;1200DAQboard,theanaloguesignalwillbetransformed ;intoadigitalsignalsothattheLabVIEWsoftwareisable ;toreadandreceivethedata.Therefore,thehardware ;modulefortheon-linemonitoringsystemconsistsof ;sensors,amulti?channelsignalconditioningmodules ;(SCXI.1349MIC16E),a16.bitDAQBoard(ModelLab- ;PC-1200),andacomputerserver,asshowninFig.2. ;出圈MACHININGCENTERSENSORSIGNALCONDITIONING ;DATAANALYSISCOMPUTORDATAQUISITION

    ;Fig.2Designofhardwareconfiguration

    ;2Configurationofrunningplatformand

    ;designofsystemsoftwarearchitectures

    ;Inordertorunthissystemeffectively,constructinga ;suitablenmningplatformisnecessaryandespeciallycrucia1. ;TheWindows2003AdvancedServerisabetterplatform ;forrunn~businessapplicatiouswithbetterSMPscalability, ;improvednetworkingperformance,andsupportformore ;physicalmemory.Withtighterintegrationbetweenthe ;Windows2003AdvancedServerandInternetInformation ;Server(IIS),itoffersnotonlyaServer,butalsoanumber ;ofotherInternetservicessuchasFTP,News,WWW,and ;SMTP,whichprovideshigheravailabilityforWebServers ;

    ;32JournalofDonghuaUniversity(Eng.Ed.)Vo1.22,No.5(2005) ;andsites.Hence,weselectWindows2003Advanced ;Serverastheoperatingsystemoftherunningplatform. ;I)ata’baseServeradcIptsSOLServer2000RelationalI)atabase.

    ;InordertocreatedynamicWebpagesthatinteractwith ;theusershowingcustomizedinformation.theserviceside

    ;utilizesthelatestASP.NETtechnologies,includingC, ;ActiveServerPages(ASP),andJavaServerPages(JSP), ;asenablingtechnologiesforsystemimplementation.The ;overallconfigurationofWebplatformisdesignedto ;provideuserswithaweb-basedandaVIs-basedshopfloor ;environmentwhererea1.timemonitoringandremote ;maintenanceguidingfromservicecentersareundertaken. ;Thesystemcollectsthevariablesofthemachiningcenters ;bymeansofsensors.Thesesignalswereamplified(SCXI- ;1349MIo.16E),digitized(Lab.PC.1200),deliveredand ;storedincomputer.Themeasureddatawasprocessedand ;analyzedwiththecomputerprogrammadebyLabVIEW. ;TheLabVIEWdataacquisitionmoduleisbasedonaPC ;computer,andisageneral-purposeprogrammingsystem ;withanextensivelibraryoffunctionsandsubroutinesfor ;anyprogrammingtask.Italsocontainsanapplication ;specificlibraryfordataacquisition,serialinstrument ;control,dataprocessing,analysispresentationandstorage. ;ThisapplicationusestheLabVIEW’sDataSocketTransport

    ;Protocol(DSTP)toreadandwritedataacrossnetwork. ;,l1entheDSTPisused,theDataSocketServer

    ;communicateswithanyvirtualinstrument(VI).This ;allowstheVItopublishorsubscribetodata.Wecan ;identifydifferenttypesofdatathroughtagnames,which ;appendtotheURLaddress.Fig.3showsonesnapshotof ;thewebuserinterfaceoftheproject.

    ;Fig.3Asnapshotofthewebuserinterface

    ;3ProposedXM[Irbasednetworksolution

    ;Intheareaofremotemonitoring,reducingnetwork ;trafficandincreasingsystemperformancearethemajor ;concernsinweb-basedsystemdevelopments.Thelatest ;XMLtechniqueistheuniversalLinguaFrancastandardand ;isperhapstheonlytechnologythatisendorsedbyallthe ;majorvendorsofapplicationserversandplatforms.Itisa ;cross-platform,softwareandhardwareindependenttool ;fortransmittinginformationandsupportsawidevarietyof ;applications.XMLisasimportanttothefutureoftheWeb ;asHTMLhasbeentothefoundationofthewebandthat ;XMLwillbethemostcommontoolforalldata

    ;manipulationanddatatransmission.Theadvancementof ;XMLbasednetworkapplicationsistobringatighter ;couplingbetweensoftwaredevelopmentenvironmentsand ;hardwaredeploymentplatformsandtoensureunparalleled ;performance,securityandmanageabilityofremote

    ;monitoringandmaintenanceguidingsystemformachining ;centers.Therefore,thesolutionholdstheapplications ;programinXM_Ltagsthatareeasilyparsedforreuse,and ;thereistremendousflexibilityandcompleteindependence ;whenitcomestotheprogramminglanguage(Java,C++, ;VBetc.),theapplicationserver(J2EEor.NET),orthe ;operatingsystem(Unix,Windows,Linux).Inaddition, ;therearenumerousstandardizationbodiesthatareworking ;onXM_Lvocabulariesofvarioushorizontalandvertical ;industriesandextendingthemforusewithWebservices ;architectures.Thegoalofourcombinedweb-basedand ;XMI.basedapproachistoeliminatenetworktraffic,while ;stillprovidingenduserswithintuitiveinteractiveenvironments. ;Itisbeingdesignedintoaframeworkwithopenarchitecture. ;Conclusions

    ;Thispaperpresentsthedevelopmentanduseofthe ;realtimeremotemonitoringandknowledge-basedmaintenance ;guidingsystemofmachiningcenters.Thesystemisbased ;oncomputerprogram,acquisitionsystem,andaknowledge- ;

    ;doumalofDoaghuaUniversity(Eng.Ed.)Vo/.22,No.5(2005)33 ;basedmaintenancesupportdatalr,tse.Theon-linemonitoring ;systemprovidesapracticalwayforobtainingprocessstatus. ;Theknowledge-basedrwaintenanceguidingsystemwasusedto ;diagnoseefficientlymanyofthemalfunctionsthatariseat ;machiningcentersduringmanufacturing.Thisresearch ;definitelyindicatessomedirectionsforfuturework. ;References

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