基于LabVIEW的音频信号发生器的虚拟仪器设计 毕业设计论文.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。它以软件为核心利用图形化编程软件LabVIEW来实现信号发生器真正做到“软件即硬件”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 of computer and microelectronics technology, virtual instruments appear. Virtual instruments achieve the perfect combination of computer science technology and instrument technology through taking the software as the core technology. Virtual instruments realize and enhance the functions of traditional instruments by developing computer 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 become 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 of common analog periodic signals based on LabVIEW, the design also bring forward to replace the expensive commercial 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 system composing module is presented. Key words: virtual instrument; audio signal generator; LabVIEW; sound card 目 录 1 绪论 1 1.1 课题背景 1 1.2 虚