毕业设计（论文）-基于LabVIEW的音频信号发生器的虚拟仪器设计.doc

基于LabVIEW的音频信号发生器的虚拟仪器设计
摘要: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:虚拟仪器;音频信号发生器;LabVIEW;声卡

Virtual Audio Signal Generator Based on LabVIEW
Abstract: With the development puter and microelectronics technology, virtual instruments appear. Virtual instruments achieve the bination puter science technology and instrument technology through taking the software as the core technology. Virtual instruments realize and enhance the functions of traditional instruments by puter technology .Virtual instruments initiate the new era that the instrument users can be the instrument designers. Virtual instruments represent the direction of instruments and it has e the main direction of technological development in the 21st century testing technology and instruments. This design used graphical programming software LabVIEW to design virtual audio signal generator, exactly adjusting the trend of the instrument development, and truly achieve "software that is hardware". In order to reduce production costs and implement single - channel and dual - channel output mon analog periodic signals based on LabVIEW, the design also bring forward to replace the mercial data acquisition card with PC sound card. It has broad application and development prospect. Based on brief introduction of virtual instruments concept, present conditions ,developing trends and characteristics of programming software LabVIEW ,the basic principles of audio signal generator are outlined , the function and relative configurations of sound card are analyzed, and details of each posing module is presented.
Key words: virtual instrument; audio signal generator; LabVIEW; sound card

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