labviewbased virtual function signal generator（基于labview的虚拟函数信号发生器的设计外文翻译学士学位论文.doc

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1、浙江农林大学本科生毕业设计（论文）Labview-basedvirtualfunctionSignalGenerator1IntroductionSince1986,theU.S.NI(NationalInstrument)companiestotheconceptofvirtualinstrumentation,alongwithcomputertechnologyandmeasurementtechnology,virtualinstrumenttechnologyhasalsobeendevelopedrapidly.Virtualinstrumentm

2、eans:useoftheexistingPC,withaspeciallydesignedinstrumenthardwareandproprietarysoftware,theformationofthebasicfunctionsofboththeordinaryinstrument,thereareusuallynospecialequipmentfeaturesofthenewinstrument.Comparedwiththetraditionalinstrumentsofitsfeaturesare:bettermeasurementaccura

3、cyandrepeatability;measurementspeed;systemsetuptimeisshort;instrumentfunctiondefinedbytheuser;scalability;technicalupdatesandquick.Virtualinstrumentsoftwareasthecore,thesoftwarecompanyYouyiU.S.NILabviewvirtualinstrumentsoftwaredevelopmentplatformmostcommonlyused.Labviewisagraphicalp

4、rogramminglanguage,mainlyusedtodevelopdataacquisition,instrumentcontrolanddataprocessingandanalysissoftware,andpowerful.Currently,thedevelopmentofsoftwareintheinternationaltest,measurementandcontrolindustry,popular,measurementandcontrolareasinthecountryhasalsobeenwidelyused.Function

5、Generatorisascientificresearchandengineeringdesigninawidelyusedgeneral-purposeequipment.ThefollowingfunctionsignalgeneratorwithavirtualdesignanddevelopmentofspecificdescriptionisbasedongraphicalprogramminglanguageLabviewvirtualinstrumentprogrammingandimplementationoftechnology.10浙江农

6、林大学本科生毕业设计（论文）2virtualfunctionsignalgeneratorstructureandcomposition2.1VirtualFunctionGeneratorfrontpanelThisvirtualfunctionsignalgeneratormainlyconsistsofaPCIbus,multi-functiondataacquisitioncardandappropriatesoftware.TheminstalledonaPCrunningWindows95/98/2000/NTthemachine,shallcon

7、stituteapowerfulfunctionofsignalgenerator.ThedesignofthevirtualfunctionsignalgeneratorreferencesignalgeneratorSG1645powerfunctions,frontpanelshowninFigure1.Figure1virtualfunctionsignalgeneratorfrontpanelThefunctiongenerator'sfrontpanelfunctionofthefollowingcomponents:instrumentcontr

8、olbutton,theoutputf