基于LabVIEW的英文文献VIP免费

中北大学2013届毕业设计说明书英文文献及中文翻译ElectricMeasurementswithLabVIEWDambovitaAbstract:ThepaperpresentsadataacquisitionsystemwhichconsistsinHalleffectsensors,aPCI6023(NationalInstruments)dataacquisitionboard,LabVIEWgraphicalprogrammingenvironmentandtheexperimentalresultsachievedbytheauthorsconcerningthebehaviorofacelectricalcircuits.Theinstrumentsusedinthemeasurementtechniqueweredevelopedascomputerdatabaseequipments,usingwelldeterminedfunctions(theacquisitionofparameters,signalprocessing/adapting)withthecommunicationpossibilityonaserialinterfaceoronaparallelport.Today,dataacquisitionboardsareusedandcanbeassembleddirectlyintothecomputer,havingtheoperationpossibilityofanoscilloscope.TheappearanceoftheLabVIEWenvironmentwasmotivatedbytheresearchautomationactivityandbytheapplicationdevelopment,basedonahierarchicalinstrumentstructure,whichiscomposedbytheuser'sinterfaceandthevisualprogrammingelements.Keywords：dataacquisition,graphicalprogramming,Halleffect,electricpower1IntroductionTheuseoftheLabVIEWgraphicalprogrammingenvironmentensurestheanalysisandstudyofpowermeasurementmethodsinsingle-phaseandthree-phasealternativecurrentcircuits[3,6,7].Theevolutioninbothelectricmeasurementtechnique,intheelectronicfieldandintheareaofdataacquisitionsystems,argumentstheopportunityandjustificationofdesigningnewinstrumentsinordertoimprovetheresearchactivityinthisarea[2,3].Themodernappliedmetrologyisintegrallylinkedwithotherfast-growingdomains,suchascomputertechnology,dataprocessingandtelecommunications.Adaptationoftheinformationsystems’techniquesfortheneedsofmeasurementsystemscreatedanewinterdisciplinaryfielddealingwithDistributedMeasurement-ControlSystems(DMCS).ElementsofDMCS(nodes)aredistributedterritorially,connectedviawiredorwirelessnetworkandabletoexchangeinformationbetweeneachother.CurrentlytheresearchintheareaofDMCSisfocusedontheapplicabilityissuesandadaptingofnewinformationandcommunicationtechnologiesforsuchsystems[8].Nowadays,averyimportantissuein第1页共10页中北大学2013届毕业设计说明书英文文献及中文翻译DMCStechnologyensuresthesafetyofcommunication.Inmanycases,thesuccessofoftencostlyexperimentsormissionsandalsothebiologicalandeconomicalsecuritydependsontheproperfunctioningofsuchsystems.Duetothestillgrowingintegrationwithtelecommunicationsandgeneralpubliccomputernetworks,thesecurityofdistributedmeasurementsystemshasbeendramaticallyreduced.InmanyDMCStheinformationsecurityofthenetworkbecomesoneofthemajordevelopmentproblems.Informationsecurityissuesarealsoveryimportant(becauseofthespecificopennessofsuchsystems,andeaseofattack)inthewirelessandmobileDMCSsystems.SincethenodesofDMCScanbebothsocalledMeasuringServers,usuallybasedonPCswithhugeprocessorpower,aswellasmobilewirelesssensorspoweredfrombattery,theexistingdisparityofcalculationpowermakesanotherimportantissueforthedevelopmentofcommonmethods,ensuringthesafetyofDMCS.Thereforethereisanurgentneedtodeveloppropermethodsandtoolstoensurethesafetyandsecurityofthesesystems[1,8].Thesoftwareplaysnowadaysahugeroleinmeasurementsystemsandveryoftendeterminestheirquality.Thegrowingprocessors’computingpowerandmemorycapacityallowsforthedevelopmentofmorecomplexsoftware.Animportantissuebecomesthecreationofnewmethodsandsoftwaretoolsfordesigningdistributedmeasurementsystems,andinparticularlow-costandeasyto-uselibrariesandtoolsfordesigningsoftwaretha...