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变压器油中溶解气体光声信号检测的干扰抑制方法
引用本文:陈伟根,罗明才,张嵩,王有元.变压器油中溶解气体光声信号检测的干扰抑制方法[J].高压电器,2008,44(2):139-142.
作者姓名:陈伟根  罗明才  张嵩  王有元
作者单位:重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆,400044
基金项目:重庆市科委自然科学基金重点资助项目(CSCT,2007BA3002)
摘    要:光声光谱气体检测技术能很好地应用于变压器油中溶解气体的在线监测,为了提高其检测信噪比,笔者针对光声信号检测的强噪声环境,结合小波阈值去噪和混沌检测来抑制检测过程中的强噪声干扰,配合使用LabVIEW和Simulink构建信号检测系统提取微弱光声信号。实验结果表明该方法对被强噪声覆盖的微弱周期信号非常敏感,能有效地抑制强噪声干扰。

关 键 词:光声信号  干扰抑制  小波阈值去噪  混沌检测
文章编号:1001-1609(2008)02-0139-03
修稿时间:2007年5月11日

Restraining-interference Method for Photoacoustic Signal Detection of Dissolved Gases in Transformer Oil
CHEN Wei-gen,LUO Ming-cai,ZHANG Song,WANG You-yuan.Restraining-interference Method for Photoacoustic Signal Detection of Dissolved Gases in Transformer Oil[J].High Voltage Apparatus,2008,44(2):139-142.
Authors:CHEN Wei-gen  LUO Ming-cai  ZHANG Song  WANG You-yuan
Abstract:Photoacoustic spectrum gases detecting technique can be well applied to on-line monitoring of dissolved gases in transformer oil.In order to improve the monitoring SNR,this paper combines wavelet thresholding denoising with chaotic detection to restrain strong noise interference in photoacoustic signal detecting process,and uses LabVIEW and Simulink to set up signal detection system and pick up weak photoacoustic signal.The test results show that this method is very sensitive to weak periodic signal submerged in strong noise,and can effectively restrain strong noise.
Keywords:photoacoustic signal  restraining-interference  wavelet thresholding denoising  chaotic detecting
本文献已被 CNKI 维普 万方数据 等数据库收录!
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