虚拟数字存储示波器外文翻译Word文档格式.docx

虚拟数字存储示波器外文翻译Word文档格式.docx

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VirtualdigitaloscilloscopePXIbusfromamulti-functionaldataacquisitioncardandthecorrespondingsoftware.TheywillbeinstalledonaPCrunningWindows,constitutesapowerfulcanstoredigitaloscilloscope.

DataAcquisition

ThedesignofNIisusedbythecompany'

smulti-purposedataacquisitioncardPXI-6670E,itsmainfunctionsareasfollows:

64-waysingle-ended/32-waydifferentialanaloginput;

12accuracy;

1.25MSPSsamplingspeed;

1.25MSPSdiskwritespeed;

±

0.05~±

10Vinputrange;

two-way12analogoutputs;

eightdigitalI/O.two-way24counter/timer.

Functionalequipment

Inthiscasevirtualdigitaloscilloscopewithreal-timedataacquisition,spectralanalysisandwindowtreatmentandfilteringcapabilities.Inthevirtualdigitaloscilloscopemainpanelondatacollectionandanalysisofthespectrum,andwindowprocessing,filteringandotherfunctionkeys,accordingtothecorrespondingbuttonwecanenterintotheappropriatesub-panel.

SoftwareDesignandImplementation

VirtualdigitaloscilloscopesoftwaredesignbasedontheuseofC-languageprogrammingenvironmentLabWindows/CVI.LabWindows/CVIsupportnumericaltype,Boolean,andthestringoftext,andotherdatatypes,butthebiggestadvantageisthroughdialogformsofinteractiveoperationsgeneratestandardCcode.InadditionLabWindows/CVIprovidesaveryrichdebugtools,includingsingle-step,breakpoints,variableview,monitorwindow,andsoon,thesefeaturesmaketheadjustmentprocesshasbecomemorevulnerable.

Themainfunctionmodules

Virtualdigitaloscilloscopemainlybythesoftwarecontrolsignalsthecompletionoftheacquisitionanddisplayprocessing,datacollectioninthemainpaneltocompletethefollowingfeatures:

Settingupaccess,setupsamplingfrequency,setupamannerthatwaveform,datacollectioninthemainpaneltocompletethefollowingFeatures:

Acquisitionofreal-timesignalandthesignalonitsownspectrumanalysis,seelines,andotherfunctions,andwindowpanelsdealingwiththeacquisitionofreal-timesignalandthesignaltoincreaseprocessingwindows（includingwindowsHaiming,Hammingwindow,Buiakeansmoothingwindowsandwindow,etc.）.Filteringinhandlingpanelincludesthefollowingfeatures:

theacquisitionofreal-timesignalandthesignalonitsownfilteringtreatment（includingsingle-stepfiltering,multi-stepfilteringmethodandtraditionalmethods,etc.）

Thesourcefilesgeneratedwhenthecontrolpaneltocompletetheset,youcanhaveafunctionofthecodeofprocedure.Specificmethodsfor:

tohavecompletedthepanelasaresponsetothecurrentstateofthe[Code]menu,select[Generate]inthe[AllCode],inthepop-updialogfunctionselectedinthemainpanelandwithdrawfromthefunction,Andtheuserinterfacewillbeabletoproducedocumentsrelativetotheframeworkofthecodefunction.

Addthecodegeneratedautomaticallysteponthecorrespondingcontrolisafunctionoftheframework,tomakecertaincontrolstocompletethefunction,wemustaddcodetocontrolthecontrols.Onemain（）functionistheentranceprocedures,itisthefunctionofinitializationprocedures,loadingtheuseranddisplaypanels,suchastocompleteotherfunctionsrequiredtoaddcode.Followingthecodefordataacquisitionfunctions,dataacquisitionprocessbycallingthecallbackfunctionbuttonSHOUexternalacquisition.

Softwaredevelopmentenvironment:

virtualdigitaloscilloscopesoftwaredesignbasedontheuseofC-languageprogrammingenvironmentLabWindows/CVI.LabWindows/CVIsupportnumericaltype,Boolean,andthestringoftext,andotherdatatypes,butthebiggestadvantageisthroughdialogformsofinteractiveoperationsgeneratestandardCcode.InadditionLabWindows/CVIprovidesaveryrichdebugtools,includingsingle-step,breakpoints,variableview,monitorwindow,andsoon,thesefeaturesmaketheadjustmentprocesshasbecomemorevulnerable.

Havethefunction

★functionwithreal-timedisplay:

AcquisitionAcquisitionsignaltotheinputsignalandreal-timedisplayinaPCterminal.

★digitalfiltering:

IIRfilterontheuseofdigitalsignalprocessingandreal-timefiltering,atthesametimefiltercanbesetupinthebestapproximationfunctiontype,filtertype,order,fromtoptobottomcut-offfrequency,andotherparameters.

★latestwaveshow:

tomeetthetransientwaveformdisplay,butcanalsobetransientwaveformtobesaved.

★waveformstorage:

atanytimeaftertheoriginalsignalorsignalstotheLVMLabVIEWuniquefileformatstoredonthelocalharddrive,forfutureanalysisorprocessing.Onetransientsignaltothecut-offwaveafterBMPformatimagesstoredinlocalhard上供viewandanalysisofthefuture.

★significantwaveback:

tokeep