光通信技术2024，Vol.48Issue(2)：84-89,6.DOI:10.13921/j.cnki.issn1002-5561.2024.02.015
基于VMD和排列熵的海缆振动信号降噪方法
Denoising method for submarine cable vibration signals based on VMD and permutation entropy
郭家兴 1钱君霞 1闫安心 1赵盛杰1
作者信息
- 1. 江苏科能电力工程咨询有限公司,南京 210036
- 折叠
摘要
Abstract
In order to effectively remove noise from the signal,a denoising method for submarine cable vibration signals based on variational mode decomposition(VMD)and permutation entropy(PE)is proposed.This method first uses VMD to decompose the signal into several intrinsic mode functions from high frequency to low frequency,and then calculates the PE values of each mode component to quantitatively characterize its degree of randomness.Next,wavelet thresholding is applied to the intrinsic mode function(IMF)components with more noisy information,and the denoised submarine cable vibration signal is obtained through signal reconstruction.In order to verify the effectiveness of this method,a simulation experimental system for monitoring the vibration signals of submarine cables based on Brillouin optical time-domain analysis(BOTDA)is established.The vibration signals of submarine cables under three working conditions of erosion,friction,and anchoring are obtained through experiments.The experimental results show that the proposed method can effectively remove high-frequency noise in submarine cable vibra-tion signals.The signal-to-noise ratios of the three types of signals,namely erosion,friction,and anchoring,are increased to 30.257 8 dB,29.635 4 dB,and 38.786 2 dB,respectively,with a low standard deviation.关键词
海底电缆/降噪/布里渊光时域分析/振动监测Key words
submarine cable/noise reduction/Brillouin optical time domain analysis/vibration monitoring分类
电子信息工程引用本文复制引用
郭家兴,钱君霞,闫安心,赵盛杰..基于VMD和排列熵的海缆振动信号降噪方法[J].光通信技术,2024,48(2):84-89,6.
