基于经验小波变换的多通道微弱电流信号噪声控制

Noise control of multi-channel weak current signal based on empirical wavelet transform

摘要:

多通道微弱电流信号受很多噪声因素的干扰，导致微弱电流信号输出相对误差增加，为此提出基于经验小波变换的多通道微弱电流信号噪声控制方法。采集多通道微弱电流信号，利用经验小波变换技术分解采集到的微弱电流信号，判断电流信号中是否存在噪声并确定噪声类型。装设微弱电流信号噪声控制器，根据电流信号中的噪声量与噪声类型生成控制指令，对不同通道微弱电流信号噪声进行控制。实验结果表明，该方法的多通道微弱电流信号信噪比较高，输出信号与原信号之间的相对误差较小，可以实现多通道微弱电流信号噪声控制。

Abstract:

The multi-channel weak current signal is interfered by many noise factors, which leads to the increase of the relative error of the weak current signal output. Therefore, a multi-channel weak current signal noise control method based on empirical wavelet transform is proposed. Collect multi-channel weak current signal, decompose the collected weak current signal using empirical wavelet transform technology, judge whether there is noise in the current signal and determine the type of noise. A weak current signal noise controller is installed to generate control instructions according to the amount and type of noise in the current signal to control the weak current signal noise in different channels. The experimental results show that the signal to noise ratio of the multi-channel weak current signal is high, the relative error between the output signal and the original signal is small, and the multi-channel weak current signal noise can be controlled by this method.