外文翻译--基于虚拟仪器技术的风机性能自动测试系统.doc外文翻译--基于虚拟仪器技术的风机性能自动测试系统.doc

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英文原文AUTOTESTINGSYSTEMFORFANPERFORMANCEBASEDONVIRTUALINSTRUMENTATIONTECHNOLOGYABSTRACTINACCORDANCEWITHTHEPRESENTSTATUSOFMEASUREMENTOFFANPERFORMANCEWITHBURDENSOMEINLABORS,LOWINACCURACYANDBACKWARDINTESTINGMETHOD,AUTOTESTINGSYSTEMFORFANPERFORMANCEBASEDONVIRTUALINSTRUMENTSVITECHNOLOGYWASDEVELOPEDTHESYSTEMINTEGRATEDSENSORTECHNOLOGY,COMPUTERTECHNOLOGYANDMEASUREMENTTECHNOLOGYASARESULT,THESYSTEMCANNOTONLYAUTOMATICALLYACQUIRE,PROCESSTESTINGDATAANDEXPRESSTHEFINALRESULTSINSUITABLEFORMSBUTALSOCONTROLANDADJUSTDIFFERENTWORKINGLOADSTHEWHOLESYSTEMISFRIENDLYININTERFACE,EASYINOPERATIONANDCOMPLETEINFUNCTIONSTHEEXPERIMENTRESULTSSHOWEDTHATTHESTABILITYOFTHEEXPERIMENTPROCESSINCREASED,THEREADINGERRORWASAVOIDEDANDTHEMEASUREMENTACCURACYANDEXPERIMENTEFFICIENCYWEREIMPROVEDTHESYSTEMHASBEENWIDELYAPPLIEDTOMANYFANPRODUCTIONFACTORIESANDRESEARCHINSTITUTESKEYWORDSFAN;PERFORMANCETESTING;AUTOTESTING;VIRTUALINSTRUMENTATION;DATAPROCESSING1INTRODUCTIONTHEPARAMETERSOFFANFLUX,PRESSURE,POWERANDEFICIENCYNOTONLYDECIDEWORKINGPERFORMANCEBUTALSOARETHEBASISOFSELECTINGANDUSINGBLOWERFORPEOPLEBECAUSEOFTHEBLOWERTHEORYBEINGNOTPERFECT,PERFORMANCETESTINGISTHEMAINMETHODOFACQUIRINGTHESEPARAMETERSMOREOVER,THETESTINGISIMPORTANTFORTESTINGPRODUCTSANDDESIGNINGNEWPRODUCTSINCHINA,TRADITIONALFANPERFORMANCETESTINGISALWAYSDONEMANUALLYORBYSINGLECHIPWHICHHASMANYSHORTAGESINCLUDINGLOWERPRECISION,HEAVYLABORINTENSITY,UNFRIENDLYUSERINTERFACE,ANDSOONTHEREFORE,ACCORDINGTOTHEDEMANDSOFMODERNTIMESEXPERIMENTTECHNIQUE,ANAUTOMATICTESTANDANALYSISSYSTEMFORFANPERFORMANCEBASEDONVIRTUALINSTRUMENTATIONTOOLLABWINDOWS/CVIWASDESIGNEDINTHISPAPERCOMBINEDSENSORTECHNOLOGY,COMPUTERTECHNOLOGYANDTESTINGTECHNIQUE,THEVIRTUALINSTRUMENTATIONVITECHNOLOGYMAKESTHEMOSTUSEOFINTELLIGENCEOFCOMPUTERTOTHOROUGHLYBREAKDOWNTHEMODETHATTHETRADITIONALINSTRUMENTSAREDEFINEDBYTHEMANUFACTURERS,HOWEVERTHEUSERSCANNOTCHANGEWITHVI,USERSAREPROVIDEDASPACETOEXERTTHEIRCAPACITYANDIMAGINATIONADEQUATELYITISTHEUSER,NOTTHEMANUFACTURER,WHOCANDESIGNTHEIROWNINSTRUMENTSYSTEMATTHEIRPLEASUREACCORDINGTOPERSONALNEEDINTHEVIRTUALINSTRUMENTSYSTEM,THEHARDWAREONLYPROVIDESASOLUTIONTOTHEINPUTANDOUTPUTOFSIGNALS,HOWEVERTHESOFTWAREISTHEKEYTOTHEWHOLESYSTEMANYUSERMAYMODIFYTHESOFTWARETOCHANGE,INCREASEORDECREASETHEFUNCTIONSANDSCALESOFTHEINSTRUMENTSYSTEMASARESULT,THESYSTEMCANNOTONLYAUTOMATICALLYACQUIRE,PROCESSTESTINGDATAANDEXPRESSTHEFINALRESULTSINSUITABLEFORMSBUTALSOCONTROLANDADJUSTDIFFERENTWORKINGLOADSTHEWHOLESYSTEMISFRIENDLYININTERFACE,EASYINOPERATIONANDCOMPLETEINFUNCTIONSTHEEXPERIMENTRESULTSHAVESHOWNTHATTHESTABILITYOFTHEEXPERIMENTPROCESSHASINCREASED,THEREADINGERRORWASAVOIDEDANDTHEMEASUREMENTACCURACYANDEXPERIMENTEFFICIENCYWEREIMPROVEDTHESYSTEMHASBEENWIDELYAPPLIEDTOMANYFANPRODUCTIONFACTORIESANDRESEARCHINSTITUTES2HARDWAREDESIGNOFTHESYSTEMHARDWAREOFTHISSYSTEM,WHICHISTHEBASISOFSIGNALACQUISITION,CONVERSION,ENHANCEANDPROCESSING,CONSISTSOFFAN,MOTORS,WINDPIPE,SENSORS,COMPUTER,DATAACQUISITIONBOARD,FREQUENCYCONVERSIONGOVERNOR,ETCTHEBLOCKDIAGRAMOFSYSTEMSTRUCTUREISSHOWNINFIG1AMONGTHOSECOMPONENTS,COMPUTERANDPLUGINDAQBOARDPLAYANIMPORTANTROLEINTHESYSTEMWITHTHEHIGHPERFORMANCEDAQBOARD,NOTONLYDATAACQUISITION,A/DCONVERSIONBUTALSOFREQUENCYCONTROL,STEPMOTORCONTROLETCAREREALIZEDCONSIDEREDOFTHETECHNICALINDEXESSUCHASSAMPLINGFREQUENCY,ACCURACY,A/DD/ACONVERSIONRATE,RESOLUTION,THEDAQBOARDPCI6024EFROMNATIONALINSTRUMENTSUSA,WITHWHICH200KS/S,12BITPERFORMANCEON16SINGLEENDEDANALOGINPUTSCANBEGOTUPTO,ISSELECTEDTHE6024EFEATURESDIGITALTRIGGERINGCAPACITY,ASWELLASTWO24BIT,20MHZCOUNTER/TIMES;AND8DIGITALI/OLINESTWO12BITANALOGOUTPUTSAREALSOFEATUREDBYTHE6024ETHEFANPARAMETERSFLUX,STATICPRESSURE,TORQUEANDROTATIONSPEEDAREMEASUREDBYCORRESPONDINGSENSORSINCLUDINGDIFFERENTIALPRESSURETRANSMITTERBC69TYPE,ACCURACYISFS,STATICPRESSURETRANSMITTERJYBTYPE,ACCURACYIS1FS,ANDTORQUEROTATESPEEDSENSORAKC205TYPE,ACCURACYIS03FSTHESENSOROUTPUTSAREALLSTANDARDCURRENTSIGNALWITH420MATOMEETTHEDAQBOARDINPUTSIGNALTYPEANDRANGE,05VVOLTAGESIGNALSAREACHIEVEDFROM420MACURRENTSIGNALSBYANINTERFACEBOARDWHICHISUSEDFORSIGNALTRANSFORMATIONTHROUGHTHEANALOGOUTPUTCHANNELON6024E,05VVOLTAGESIGNALWHICHISCORRESPONDINGON050HZOFACFREQUENCY,ARESENTOUTTOCONTROLFREQUENCYCONVERTERFRA54015KCHTYPE,MITSUDISHI,JAPANTHEN,THEFANSPEEDCHANGESWITHVARIABLEVOLTAGETHEREGULATINGUNITOFWORKINGSTATUS,WHICHISDESIGNEDBYTHEAUTHORS,ISTHEROTATINGBAFFLESTRUCTURECOMPOSEDOFROUNDBAFFLE,SHAFTCOUPLING,CREEPERGEARANDSTEPMOTORETCSEETHEFIG2THISKINDOFSTRUCTURECANNOTONLYREALIZETHEAUTOCONTROLBUTALSOISSMALLANDFLEXIBLETHREEDIGITALI/OPORTONTHE6024EAREUSEDTOSENDOUTTHREEPHASEPULSETOCONTROLTHEROTATIONANGLEOFSTEPMOTORTHESTEPMOTORDRIVESTHEROUNDBAFFLETHROUGHTHECREEPERGEARTOREVOLVEINSIDETHEWINDPIPE,RESULTINGINTHECHANGEOFAPERTUREGAPBETWEENTHEROUNDBAFFLEANDWINDPIPE,THEREBYALTERINGTHEFLUXOFAIRFLOWINSIDETHEWINDPIPE,NAMELYTHEALTERATIONOFWORKINGSTATUSISREALIZEDTHECREEPERGEARCANPREVENTTHEPOSITIONOFROUNDBAFFLECHANGINGWHENTHEAIRFLOWISTOOSTRONGTOINSURETHEMEASUREMENTACCURACY,SEVERALANTIINTERFERENCEMEANSAREADOPTEDSUCHASDIFFERENTIALINPUTSOFSIGNALSTOELIMINATETHECOMMONMODEINTERFERENCE,GOODEARTHOFSIGNALLINEANDINSTR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