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ID:34362540
大小:139.66 KB
页数:6页
时间:2019-03-05
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1、外文翻译原文:AcquiringDataandCommunicatingwithInstrumentsThischapterintroducesyoutotheExpressVisyouusefordataacquisitionandinstrumentcommunicationonaPCrunningWindows.RefertotheLabVIEWMeasurementsManualforinformationaboutdataacquisitionandinstrumentcommunicationonallplatforms.AcquiringaSignalInthefol
2、lowingexercises,youwillusetheDAQAssistantExpressVItocreateanNI-DAQmxtask.RefertotheTakinganNI-DAQmxMeasurementinLabVIEWhelptutorialforinformationaboutadditionalmethodsyoucanusetocreateNI-DAQmxtasks.Tolaunchthishelptutorial,selectHelp»TakinganNI-DAQmxMeasurementinLabVIEW・NoteThefollowingexercis
3、esrequirethatyouhaveinstalledNI-DAQmxandanNI-DAQmx-supporteddevice.RefertotheNationalInstrumentsWebsiteatnixom/daqforthelistofNI-DAQmx-supporteddevices・IfyoudonothaveNI-DAQmxinstalledoranNI-DAQmx-supporteddevice,refertotheLabVIEWMeasurementsManualforinformationaboutusingTraditionalNI-DAQfordat
4、aacquisition・CompletethefollowingexercisestocreateanNI-DAQmxtaskthatcontinuouslytakesavoltagereadingandplotsthedataonaWaveformGraph・CreatinganNI-DAQmxTaskInNI-DAQmx,ataskisacollectionofoneormorechannels,timing,triggering,andotherpropertiesthatapplytothetaskitself.Conceptually,ataskrepresentsam
5、easurementorgenerationyouwanttoperform.Forexample,youcancreateatasktomeasuretemperaturefromoneormorechannelsonaDAQdevice.CompletethefollowingstepstocreateandconfigureataskthatreadsavoltagelevelfromaDAQdevice・1.OpenanewVI.2.SelecttheDAQAssistantExpressVI,shownatleft,ontheInputpaletteandplaceito
6、ntheblockdiagram.TheDAQAssistantlaunchesandaCreateNewdialogboxappears.3.ClicktheAnalogInputbuttontodisplaytheAnalogInputoptions.4.SelectVoltagetocreateanewvoltageanaloginputtask.ThedialogboxdisplaysalistofchannelsoneachDAQdeviceinstalled・Thenumberofchannelslisteddependsonthenumberofchannelsyou
7、haveontheDAQdevice.5.IntheMyPhysicalChannelslistbox,selectthephysicalchanneltowhichthesignalisconnected,suchasaiO,andthenclicktheFinishbutton.TheDAQAssistantopensanewwindow,showninFigure4-1,whichdisplaysoptionsforconfiguringthechannelyo
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