A Synthetic Solution for Identification and Extraction of the Effective Microseismic Wave Component Using Decomposition on Time, Frequency, and Wavelet Coefficient Domains

Mingwei Zhang, Qingbin Meng, Shengdong Liu, Hideki Shimada

研究成果: ジャーナルへの寄稿記事

抄録

To reduce noise components from original microseismic waves, a comprehensive fine signal processing approach using the integrated decomposition analysis of the wave duration, frequency spectrum, and wavelet coefficient domain was developed and implemented. Distribution regularities of the wave component and redundant noise on the frequency spectrum and the wavelet coefficient domain were first expounded. The frequency threshold and wavelet coefficient threshold were determined for the identification and extraction of the effective wave component. The frequency components between the reconstructed microseismic wave and the original measuring signal were compared. The noise elimination effect via the scale-changed domain decomposition was evaluated. Interaction between the frequency threshold and the wavelet coefficient threshold in the time domain was discussed. The findings reveal that tri-domain decomposition analysis achieves the precise identification and extraction of the effective microseismic wave component and improves the reliability of waves by eliminating the redundant noise. The frequency threshold and the wavelet coefficient threshold on a specific time window are two critical parameters that determine the degree of precision for the identification of the extracted wave component. This research involves development of the proposed integrated domain decomposition method and provides a diverse view on the fine processing of the microseismic signal.

元の言語英語
記事番号3875170
ジャーナルShock and Vibration
2017
DOI
出版物ステータス出版済み - 1 1 2017

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wavelet
decomposition
Decomposition
coefficients
thresholds
decomposition analysis
Domain decomposition methods
signal processing
noise reduction
regularity
Signal processing
Processing

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Condensed Matter Physics
  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials
  • Mechanical Engineering

これを引用

A Synthetic Solution for Identification and Extraction of the Effective Microseismic Wave Component Using Decomposition on Time, Frequency, and Wavelet Coefficient Domains. / Zhang, Mingwei; Meng, Qingbin; Liu, Shengdong; Shimada, Hideki.

:: Shock and Vibration, 巻 2017, 3875170, 01.01.2017.

研究成果: ジャーナルへの寄稿記事

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