基于LabVIEW的多通道数据采集系统的设计

江苏科技大学硕士学位论文基于LabVIEW的多通道数据采集系统的设计姓名：许剑申请学位级别：硕士专业：信号与信息处理指导教师：王建华200801011LabVIEWPCNILabVIEWLabVIEWGLabVIEWNILabVIEW8.0DSPCPUDSPDSPUSBPCUSBDSPCPLDLabVIEWWindowsXPLabSQLACCESS(VISA)LabVIEWUSBUSB(PDF)2PDF:IPCNILabVIEWLabVIEWNILabVIEW8.0DSPCPUUSBPCCPLDACCESS(VISA)LabVIEWUSBUSB(PDF)PDF:Abstract3ResearchonMulti-channelDataAcquisitionSystemDesignBasedonLabVIEWAbstractWiththerapiddevelopmentofelectronicsindustrymeasurementtechnologyandelectronicmeasuringinstrumentstechnology,newtesttheories,newmethods,newfieldsandnewstructuresofinstrumentappearcontinuously.Thefunctionandroleofelectronicmeasuringinstrumentshaveundergoneaqualitativechange.Inmanyaspects,electronicmeasuringinstrumentshavebrokenthetraditionalconceptofinstruments.Underthisbackground,thevirtualinstrumenttechniqueemerges.Virtualinstrumentistoestablishatesting&controlsystembasedoncomputersoftwareandhardwareplatform.VirtualInstrumentisthecurrenthotfieldofMeasurementandControl.ItrepresentsthefuturedirectionofdevelopmentofequipmentTechnology.Onecanuseitaccordingtotheirneedsanddesigntheirowninstrumentsystem.Softwareonlycanbechangedbymodifyingequipmentfeaturestomeetawidevarietyofapplicationneeds.Softwareistheequipmentreflectstheessentialcharacteristicsofvirtualinstrumenttechnology.LabVIEWisthemostrepresentativeinvirtualinstrumentlanguage.LabVIEWisarevolutionarygraphicalprogrammingdevelopmentenvironment;itisbasedonGlanguagetorealizedataacquisition,control,dataanalysisanddatasaid.ThesoftwarestrategyofVIisthedevelopingtrendofthenextgenerationofautomatictestsystem.Thissystemconsistsoftwoparts,partoneisdataacquisitionhardwaredesign,andparttwoisdatamanagementandanalysis.Mainfunctioninclude:dataacquisition,real-timedisplay,signalanalysis,aswellasdatastorage,itisdevelopedbaseonLabVIEW8.0.Thefirstpartofthedataacquisitionhardwaredesign,usingaDSPastheCPUofacquisitioncardithassomeadvantages,suchasfastinstructionexecution,highbusbandwidth,andhighspeedreal-timedataprocessing.WecanamplifythecapacityofthesignalprocessingthroughjoiningsometypicalalgorithmprogramminginDSPsoftware.TheuseofUSBrealizedcommunicationbetweenacquisitioncardandPC.USBhavehightransmissionrateandeasyplug-and-playadvantagesofexpansion.CombiningUSBandDSPisaneffectivesolutiontodataacquisitionaswellasAbstract4processingandtransmitting.TheentirepartoftheexternaltimingiscontrolledbyCPLD.Thesecondpart,authorthroughthecreationoftheACCESSdatabasetorealizethedatastorage,andcangeneratestatements,aswellascandosomenecessaryanalysis,suchasthewindowfunction,pointbypointanalysis.Inthispaper,usingVirtualInstrumentSoftwareArchitecture(VISA)achievedcommunicationsbetweenLabVIEWandUSB;thisapproachcanavoidthecomplexityofdevelopingtheUSBdriver,andalsocangreatlyreducethedevelopmentcycle.Inthestatementsgenerated,usedPortableDocumentFormat(PDF)filestosaveimportantdata,becausethePDFfileistheworld'ssafeandreliableactualstandardsofdistributingandexchangingelectronicdocumentsandelectronicforms.Itisquitenecessaryinsomeimportantaspectsofthepreservationofdata.Finally,theentiredataacquisitionsystemusedinpassiveintermodulationtestcontrolsystemasapartofdigitalcontrolanddisplay,andachievedagoodresults.KeyWords:LabVIEW,DataAcquisition,DSP,USB.AbstractIIAbstractWiththerapiddevelopmentofelectronicsindustrymeasurementtechnologyandelectronicmeasuringinstrumentstechnology,newtesttheories,newmethods,newfieldsandnewstructuresofinstrumentappearcontinuously.Thefunctionandroleofelectronicmeasuringinstrumentshaveundergoneaqualitativechange.Inmanyaspects,electronicmeasuringinstrumentshavebrokenthetraditionalconceptofinstruments.Underthisbackground,thevirtualinstrumenttechniqueemerges.Virtualinstrumentistoestablishatesting&controlsystembasedoncomputersoftwareandhardwareplatform.LabVIEWisthemostrepresentativeinvirtualinstrumentlanguage.ThesoftwarestrategyofVIisthedevelopingtrendofthenextgenerationofautomatictestsystem.Thissystemconsistsoftwoparts,partoneisdataacquisitionhardwaredesign,andparttwoisdatamanagementandanalysis.Mainfunctioninclude:dataacquisition,real-timedisplay,signalanalysis,aswellasdatastorage,itisdevelopedbaseonLabVIEW8.0.Thefirstpartofthedataacquisitionhardwaredesign,usingaDSPastheCPUofacquisitioncard,theuseofUSBrealizedcommunicationbetweenacquisitioncardandPC,theentirepartoftheexternaltimingiscontrolledbyCPLD.Thesecondpart,authorthroughthecreationoftheACCESSdatabasetorealizethedatastorage,andcangeneratestatements,aswellascandosomenecessaryanalysis,suchasthewindowfunction,pointbypointanalysis.Inthispaper,usingVirtualInstrumentSoftwareArchitecture(VISA)achievedcommunicationsbetweenLabVIEWandUSB;thisapproachcanavoidthecomplexityofdevelopingtheUSBdriver,andalsocangreatlyreducethedevelopmentcycle.Inthestatementsgenerated,usedPortableDocumentFormat(PDF)filestosaveimportantdata,becausethePDFfileistheworld'ssafeandreliableactualstandardsofdistributingandexchangingelectronicdocumentsandelectronicforms.Itisquitenecessaryinsomeimportantaspectsofthepreservationofdata.Finally,theentiredataacquisitionsystemusedinpassiveintermodulationtestcontrolsystema