外文翻译---LabVIEW的测量和数据分析Word文件下载.docx

外文翻译---LabVIEW的测量和数据分析Word文件下载.docx

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中文5486字英文资料@#@LabVIEWforMeasurementandDataAnalysis@#@LabVIEWisthetoolofchoiceduetoitsunparalleledconnectivitytoinstruments,powerfuldataacquisitioncapabilities,naturaldataflow-basedgraphicalprogramminginterface,scalability,andoverallfunctioncompleteness.@#@Introduction@#@Usersgenerallystarttheirworkbyacquiringdataintoanapplicationorprogram,becausetheirtaskstypicallyrequireinteractionwithphysicalprocesses.Inordertoextractvaluableinformationfromthatdata,makedecisionsontheprocess,andobtainresults,thedataneedstobemanipulatedandanalyzed.Unfortunately,combininganalysiswithdataacquisitionanddatapresentationisnotalwaysastraightforwardprocess.Applicationsoftwarepackagestypicallyaddressonecomponentoftheapplication,butseldomaddressallaspectsandneedstogettoacompletesolution.LabVIEWwasdesignedtoaddresstherequirementsforastart-to-finish,fully-integratedsolution,sothatcustomerscanseamlesslyintegrateallphasesoftheirapplicationinasingleenvironment.@#@Figure1.LabVIEWVirtualInstrumentBlockDiagram@#@Whiletherearemanytoolsthatindependentlyaddresseachoftherequirements,only@#@LabVIEWcombinesallofthemwiththepowerofgraphicalprogrammingandstate-of-the-artdataacquisitionhardware,usingthepowerofyourPC.Itisthecombinationofdataacquisition,dataanalysis,andpresentationofresults,thattrulymaximizesthepowerofVirtualInstrumentation.Avirtualinstrumentconsistsofanindustry-standardcomputerorworkstationequippedwithpowerfulapplicationsoftware,cost-effectivehardwaresuchasplug-inboards,anddriversoftware,whichtogetherperformthefunctionsoftraditionalinstruments.ThisiswhyapplicationsandprogramsbuiltwithLabVIEWarereferredtoasVI（virtualinstruments）.@#@Asanengineering-focusedtool,LabVIEWmakeshundredsofanalysisfunctionsavailableforresearchers,scientists,andengineers,aswellasstudentsandprofessors.Theycanbuildthesefunctionsrightintotheirapplicationstomakeintelligentmeasurementsandobtainresultsfaster.@#@ChoosingtheCorrectMethodforAnalysis@#@Usersincorporateanalysisintotheirapplicationsandprogramsindifferentways.Therearecertainconsiderationsthathelpdeterminethewayinwhichanalysisshouldbeperformed.@#@Inlinevs.Offlineanalysis@#@Inlineanalysisimpliesthatthedataisanalyzedwithinthesameapplicationwhereitisacquired.Thisisgenerallythecasewhendealingwithapplicationswheredecisionshavetobemadeduringruntimeandtheresultshavedirectconsequencesontheprocess,typicallythroughthechangingofparametersorexecutingofactions.Thisistypicallythecaseincontrolapplications.Whendealingwithinlineanalysis,itisimportanttoconsidertheamountofdataacquiredandtheparticularanalysisroutinesthatareperformedonthatdata.Aproperbalancemustbefoundbecausetheycouldeasilybecomecomputationallyintensiveandhaveanadverseeffectontheperformanceoftheapplication.@#@Otherexamplesforinlineanalysisareapplicationswheretheparametersofthemeasurementneedtobeadaptedtothecharacteristicsofthemeasuredsignal.Onecaseiswhereoneormoresignalsneedtobelogged,butthesechangeveryslowlyexceptforsuddenburstsofhigh-speedactivity.Inordertoreducetheamountofdata@#@logged,theapplicationwouldhavetoquicklyrecognizetheneedforahighersamplingrate,andreduceitwhentheburstisover.Bymeasuringandanalyzingcertainaspectsofthesignalstheapplicationcanadapttothecircumstancesandenabletheappropriateexecutionparameters.Althoughthisisonlyoneexample,therearethousandsofapplicationswhereacertaindegreeofintelligence-theabilitytomakedecisionsbasedonvariousconditions-andadaptabilityarerequired,whichcanonlybeprovidedbyaddinganalysisalgorithmstotheapplication.@#@Decisionsbasedonacquireddataarenotalwaysmadeinanautomatedmanner.Veryfrequently,thoseinvolvedwiththeprocessneedtomonitortheexecutionanddeterminewhetheritisperformingasexpectedorifoneormorevariablesneedtobeadjusted.Althoughitisnotuncommonforuserstologdata,extractitfromafileordatabaseandthenanalyzeitofflineto modifytheprocess,manytimesthechangesneedtohappenduringruntime.Inthesecases,theapplicationmusthandlethedatacomingfromtheprocess,andthenmanipulate,simplify,format,andpresentthedatainawaythatitismostusefultotheuser.LabVIEWuserscanthentakeadvantageofthemanyvisualizationobjectstopresentthatdatainthemostconciseandusefulmanner.@#@LabVIEWoffersanalysisandmathematicalroutinesthatnativelyworktogetherwithdataacquisitionfunctionsanddisplaycapabilities,sothattheycanbeeasilybuiltintoany application.