基于虚拟仪器的环境噪声实时监测系统研究

MONITORING SYSTEM OF REAL TIME ENVIRONMENT NOISE SIGNAL BASED ON VIRTUAL INSTRUMENT

在LabWindows/CVI环境下,基于虚拟仪器技术,借助普通计算机声卡,使用Windows低级音频服务,利用噪声的时间特性对噪声进行采集,保存采样数据,并以直观形式显示噪声的时间分布和声压级。系统通过滤波器对噪声的频域数据进行滤波处理,达到了人们对环境噪声进行监测和分析的目的,可十分方便地应用在油气管道泄漏噪声监测等实际系统中。

In this article,one method is proposed with the aid of the ordinary computer sound card,by using the Windows preliminary audio frequency service,and the character of noise time to gather the noise,then preserve sampling data and display the time distribution and acoustic pressure level of the noise in a direct way,which is under Lab Windows/CVI environment,based on the virtual instrument technology.The noise frequency range data are processed by the filter,and aim of analyzing and monitoring the ambient noise is achieved.