基于LabVIEW地音频信号发生器地虚拟仪器设计.pdf

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基于LabVIEW的音频信号发生器的虚拟仪器设计摘摘摘要要要：要：：：随着计算机与微电子技术的发展，出现了虚拟仪器。它以软件为核心，把计算机技术和仪器技术完美结合起来，充分应运飞速发展的计算机技术来实现和增强传统仪器的功能。虚拟仪器开创了仪器使用者可以成为设计者的新时代，代表了仪器发展的方向，它已成为21世纪测试技术和仪器技术发展的主要方向。本设计正是顺应仪器发展的趋势，利用图形化编程软件LabVIEW来实现虚拟音频信号发生器，真正做到“软件即硬件”。在硬件上还提出以PC声卡代替

2、昂贵商用数据采集卡，大大降低了生产成本，实现了基于LabVIEW的常用周期信号的单通道和双通道模拟输出，使设计具有广阔的开发价值和应用前景。论文在简要介绍了虚拟仪器概念、研究现状、发展趋势以及编程软件LabVIEW特点的基础上，概述了音频信号发生器的基本原理,分析了声卡的功能及相关设置，并对构成系统的各模块做了详细叙述。关键词关键词:关键词:::虚拟仪器；音频信号发生器；LabVIEW；声卡 VirtualAudioSignalGeneratorBasedonLabVIEWAbstract

3、:Withthedevelopmentofcomputerandmicroelectronicstechnology,virtualinstrumentsappear.Virtualinstrumentsachievetheperfectcombinationofcomputersciencetechnologyandinstrumenttechnologythroughtakingthesoftwareasthecoretechnology.Virtualinstrumentsrealizea

4、ndenhancethefunctionsoftraditionalinstrumentsbydevelopingcomputertechnology.Virtualinstrumentsinitiatethenewerathattheinstrumentuserscanbetheinstrumentdesigners.Virtualinstrumentsrepresentthedirectionofinstrumentsandithasbecomethemaindirectionoftechn

5、ologicaldevelopmentinthe21stcenturytestingtechnologyandinstruments.ThisdesignusedgraphicalprogrammingsoftwareLabVIEWtodesignvirtualaudiosignalgenerator,exactlyadjustingthetrendoftheinstrumentdevelopment,andtrulyachieve"softwarethatishardware".Inorder

6、toreduceproductioncostsandimplementsingle-channelanddual-channeloutputofcommonanalogperiodicsignalsbasedonLabVIEW,thedesignalsobringforwardtoreplacetheexpensivecommercialdataacquisitioncardwithPCsoundcard.Ithasbroadapplicationanddevelopmentprospect.B

7、asedonbriefintroductionofvirtualinstrumentsconcept,presentconditions,developingtrendsandcharacteristicsofprogrammingsoftwareLabVIEW,thebasicprinciplesofaudiosignalgeneratorareoutlined,thefunctionandrelativeconfigurationsofsoundcardareanalyzed,anddeta

8、ilsofeachsystemcomposingmoduleispresented.Keywords:virtualinstrument;audiosignalgenerator;LabVIEW;soundcard目目目录录录1绪论..............................................................................................................................