基于LabVIEW和声卡的数据采集及频谱分析仪设计

Design of the virtual spectrum analyzer with data acquisition based on audio card and LabVIEW

LabVIEW是一个高效的图形化程序设计环境,它在测量、测试及工业控制领域已有广泛的应用。声卡是多媒体计算机最基本的配置硬件之一,价格便宜,使用方便。本文介绍了一种将声卡作为A/D和D/A,用LabVIEW实现声音采集和虚拟频谱分析的功能。实际应用证明,文中设计的虚拟频谱分析仪成本低、性价比高、使用简单、易操作,完全能够满足数据采集和数据分析的功能。

LabVIEW is a high efficiency graphical platform with extensive applications in measuring,testing and industrial control realm.The audio card is one of the most basic disposition hardware of multimedia computer,the price is cheap and it is easy to be used.This paper introduced the design of a virtual Spectrum Analyzer based on LabVIEW and used the audio card as A/D and D/A.The spectrum analyzer designed in this paper will enriched the understanding of the signal processing and also have some merit.