Extraction of Partial Discharge Acoustic Signal by Wavelet Transform with Teager′s Energy Operator

被引：0

作者：

杜伯学

欧阳明鉴

武媛

魏国忠

机构：

[1] Tianjin University

[2] China

[3] Tianjin 300072

[4] School of Electrical Engineering and Automation

来源：

Transactions of Tianjin University | 2005年 / 04期

关键词：

partial discharge extraction; acoustic signal; wavelet transform; Teager′s energy operators; denoise;

D O I：

暂无

中图分类号：

TN912.3 [语音信号处理];

学科分类号：

0711 ;

摘要：

To develop a measurement system for monitoring partial discharge （PD） without the effect of external interferences,an algorithm of PD signal extraction based on wavelet transform with Teager′s energy operators was presented.Acoustic signal generated by PD was selected to remove excessive interfering signals and electromagnetic interferences.Acoustic signals were collected and decomposed into 10 levels by wavelet transform into approximation and detail components."Daubechies 25"was proved to be the most suitable mother wavelet for the extraction of PD acoustic signals.Compared with conventional wavelet denoising method,Teager′s energy operators were adopted to the PD signal reconstruction and the signal to noise ratio was increased by 2000-2500 in the experiment,without lost in energy and pulse amplitude.

引用

页码：289 / 294

页数：6

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