基于LabVIEW 6.i辨识微弱信号中的工频噪声

Based on LabVIEW6.i identify industrial frequency noise on faint signal

基于虚拟仪器(VI)LabVIEW6.i软件平台,采用相关估计算法,设计了VI程序,利用VI程序辨识了微弱信号中的工频噪声(或以工频为整倍数的噪声),从而消除了工频噪声干扰。本文辨识方法也适应其它正弦噪声的辨识。最后,举一个例子,用虚拟仪器测量的数据最大相对误差为0.12186%。

Based on virtual instrument(VI)LabVIEW6.i software workbench,A program to use correlation estimation algorithm is designed.Using this VI program identified industri-al frequency noise in faint Signal(or the noise of integer times industrial frequency).As a consequence,industrial frequency noise disturbance is eliminated.This means of identify suit to identify other sinusoidal noise too.At last,an example of using virtual instrument to measure it,greatest relative error of the measure numbers is0.12186%.