摘要
设计了一套基于虚拟仪器和图形化编程语言LabVIEW的水下环境噪声采集系统并加以实现.该系统采用便携式数据采集卡NIUSB-9215A作为核心的数据采集硬件,结合虚拟仪器技术和LabVIEW,完成了系统的数据采集功能.针对水下环境噪声信号的特点,在系统的前端,设计制作了信号调理电路,包括前置放大器和低通滤波器两部分.最后,实现了基于Matlab的1/3倍频程分析软件,获得了采集得到数据的1/3倍频程谱.
An underwater ambient noise data acquisition system based on virtual instrument and LABVIEW is presented in this paper. The system uses the portable data acquisition card NI USB-9215A as the core hardware,combinating the virtual instrument technology and the graphical programming language LabVIEW,to complete the data acquisition functions. Signal conditioning circuit was designed to pre-amplify and filter the underwater ambient noise signals. This circuit includes two parts,one is the pre-amplifier and the other is the low-pass filter. Finally,the system implemented one-third octave analysis based on Matlab to get the one-third octave spectrum of measured underwater ambient noise.
出处
《微电子学与计算机》
CSCD
北大核心
2010年第5期111-113,117,共4页
Microelectronics & Computer
