基于LabVIEW的数字万用表设计与实现

1119201171671—1815201119-4592-05ScienceTechnologyandEngineeringVol.11No.19July2011?2011Sci.Tech.Engng.LabVIEW1213143003324300339023200083、LabVIEWNIPXI-4070、。、、、、。、。LabVIEWPXI-4070TM935A20113231986—。。、。。、、。。Lab-VIEW、、。LabVIEWNIPXI4070。1、。/A/D11。12NI3UPXIPXI—40706121．8MS/s300V。PXI—407023。300V、18MS/s2。PXIPXIS—2555T—B2。233．1LabVIEW4IviDmmPXI-4070NI-DMM。IviDmmLabVIEW3。3。、、、、、、。4。5IviDmmInitialize．ViIviDmmInitialize．Vi3IviDmmConfigureMeasurement．Vi、100nV61/2IviDmmConfigureAutoZero．ViIviDmmRead．ViIviDmmGetAutoRangeValue．viIviDmmClose．Vi。5。。3．2。VI。6。395419LabVIEW45644．1、、。4．2。495411。4．3dBdBmMin/Max。4．4312412512612。4．550Hz60Hz4．6。4．74．8。。PXI—4070、1300V1A100MΩ1～500kHz。。234560112。612312。61/2、20mV100nV。3100/s10/s。4＞140dB＞70dB。7。75LabVIEW、、1PXI23。1．．2005112—1162NationalInstrumentCorporation．NI4070/4072Specifications．20053NationalInstrumentCorporation．NIDigitalMultimetersHelp．20054．LabVIEW．20096—75NationalInstrumentCorporation．NI-DMMInstrumentDriverQuickRefe-rence．2005595419LabVIEWDesignandRealizationofDigitalMultimeterBasedonLabVIEWLUOYin-bo1GAOJing-dong2HUBai-qing1XIAJun-jie3CollegeofElectricalandTechnology1TrainingDepartment2NavalUniversityofEngineeringWuhan430033P．R．ChinaNo．902Navalfactory3Shanghai200083P．R．ChinaAbstractForthedemandofdigitalmutimeterwhichisintegratableandarchivableinvirtualdetectingsystemofnavigationequipmentonnavalshipLabVIEWprogramminglanguageandNIPXI-4070wereadoptedasthesoft-wareandhardwareplatform．Thedigitalmultimeterfunctionaltheoryofvirtualdetectingsystemwasstudied．Thenthefunctionmodelwasdeterminedandthehardwarestructurewasdesigned．Thefrontpanelandflowchartisde-signed．Allkindsoffunctionsarerealizedsuchasmeasurementofalternatingcurrentdirectcurrentandresist-anceselectionrangeautomaticallyandautoarchiveofmeasurementresultandsoon．Throughtestandanalysisoftechnicalindexitturnedoutthatthedigitalmultimeterworkswellwithgoodperformanceandmeetsthedemandofvirtualdetectingsystemofnavigationequipmentonnavalship．KeywordsLabVIEWdigitalmultimetervirtualinstrumentPXI-4070695411