摘要
在Labwindows/CVI开发平台上利用声卡进行数据采集时存在噪信比很大的工频干扰,由此本文针对这一现实问题,提出了一种部分重叠采样的IIR数字滤波方法,并结合实际应用实现了对采样序列的连续滤波,提高信噪比的同时也有效地抑制了工频干扰。该滤波方法简单有效,可以为基于Labwindows/CVI开发平台的数据采集和滤波处理等应用提供参考。
Power line interference with the great noise to signal ratio is existing in data acquisition system with sound card on Lab- windows/CVI development platform, for the purpose of solving this problem, an IIR d!gital filtering method based on partial over- lapped sampling is put forward, and for the practical applications, a consecutive filtering of sampling sequence is implemented. The result shows： it improves the signal to noise ratio and suppresses the power line interference, moreover it is simple and effective, it can provide reference for the application such as based on Labwindows/CVI development platform for data acquisition and filtering processing etc.
出处
《微计算机信息》
2009年第13期82-83,156,共3页
Control & Automation
关键词
工频干扰
声卡
数据采集
连续滤波
power line interference
sound card
data acquisition
consecutive rdtering
