虚拟仪器技术论文论文题目基于LabVIEW的虚拟仪器技术及应用学生姓名殷兴学号1422110227专业能源与动力院(系)国际学院任课教师王会清i摘要本文从虚拟仪器的起源、发展入手，简单介绍虚拟仪器的功能，比较虚拟仪器与传统仪器的不同之后，全面的介绍了虚拟仪器设计技术,并用软件仿真的方法设计了一台虚拟仪器，实现了从数据采集到数据分析的全过程。虚拟仪器的设计分成两个方面。硬件方面，本文从最基本的传感器、信号调理开始介绍数据采集过程以及DAQ板卡。除此之外，本文还介绍了虚拟仪器总线技术，重点为专用于虚拟仪器的VXI总线系统以及PXI总线系统。软件方面，主要利用现今最有代表性的图形化编辑软件——LabVIEW，并用之模拟从DAQ板卡中采集到一路带有均匀白噪声的正弦信号，显示其波形，并分析、显示其幅频特性曲线以及相频特性曲线。另外本文还根据LabVIEW中的子程序，实现了语音信号的录音与播放。本文还从市场出发对虚拟仪器的配置投资做了具体阐述，指明了构造虚拟仪器平台所需要的投资，为今后的学习工作打下了基础。并对国内外虚拟仪器的部分应用案例作了介绍，指出虚拟仪器是仪器历史的一次革命。关键词虚拟仪器数据采集总线LabVIEWiiABSTRACTThispapergivesabriefintroductionofthefunctionsofvirtualinstrumentsfromitsoriginanddevelopment.Aftercomparingthevirtualinstrumentsandthetraditionalinstruments,itwhollyintroducesthedesigningtechnologyofvirtualinstrumentsanddesignsavirtualinstrumentbysoftwareemulate,realizingthewholeprocessfromdataacquisitiontodataanalysis.Thedesignofvirtualinstrumentisdividedintotwoparts:softwareandhardware.Fromtheaspectofhardware,thispaperintroducesthedataacquisitionprocessandtheDAQboardcardfromthefundamentalsensorsandsignalconditioningandthenfurtherintroducesthebustechnologyofvirtualinstruments,withtheemphasisonvirtualinstruments’uniquebustechnology-VXIandPXI.Fromtheaspectofsoftware,itintroducesthemostrepresentativefiguralizedcompilingsoftware---LabVIEW,whichisusedtoimitateagroupofsinewavesignalwithwhitenoisesignalcollectedfromaDAQboardcard,showthewaveshape,analyzeandshowtheamplitude—frequencycharacteristicandphase—frequencycharacteristiccurves.Besides,thepaperdesignsaprogramthatcanrecordandplaysound.Inaddition,basedonthemarket,thispaperillustratestheinvestmentofvirtualinstruments,layingfoundationforfurtherresearchandpointsoutthatvirtualinstrumentslaunchesarevolutioninthehistoryofinstruments.KEYWORDSVirtualInstrumentDataAcquisitionBusLabVIEWiii目录引言................................................................................................................................................................1第一章虚拟仪器概述...................................................................................................................................21.1仪器的发展............................................................................................................................................21.1.1仪器的发展...................................................................................................................................21.1.2虚拟仪器的发展.........................................................................................................................31.2虚拟仪器的分类..................................................................................................................................31.3与传统仪器的比较.............................................................................................................................51.4虚拟仪器方案..................................
