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Wideband background noise suppression method for high-speed train seismic source seismic signals

A technology of seismic signal and background noise, applied in the field of seismic exploration data processing

Active Publication Date: 2019-07-02
XI AN JIAOTONG UNIV
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Problems solved by technology

However, the actual collected data not only contains the seismic waves excited by the special high-speed rail source, but also various broadband background noises

Method used

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  • Wideband background noise suppression method for high-speed train seismic source seismic signals
  • Wideband background noise suppression method for high-speed train seismic source seismic signals
  • Wideband background noise suppression method for high-speed train seismic source seismic signals

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Embodiment Construction

[0060] The invention provides a method for suppressing broadband background noise of high-speed rail focal seismic signals, which introduces the signal separation method of morphological component analysis into high-speed rail focal seismic signal processing, realizes sparse modeling of high-speed rail focal seismic signals and further realizes Suppression of broadband background noise in high-speed rail source seismic data.

[0061] see figure 1 A method for suppressing broadband background noise of a high-speed rail seismic source seismic signal of the present invention, comprising the following steps:

[0062] S1. Based on the different frequency domain characteristics of the narrow-band high-speed rail source seismic signal and the broadband background noise, the discrete cosine transform is selected to represent the narrow-band high-speed rail source seismic signal sparsely, and the continuous wavelet transform is selected to represent the broadband background noise spars...

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Abstract

The invention discloses a wideband background noise suppression method for high-speed train seismic source seismic signals. Based on different frequency domain characteristics of narrow-band high-speed train seismic source seismic signals and wideband background noise, discrete cosine transform is selected to sparsely represent narrow-band high-speed train seismic source seismic signals, continuous wavelet transform is selected to sparsely represent wideband background noise, and an over-complete dictionary is constructed; a block coordinate relaxation method is then used to separate the narrow-band high-speed train seismic source seismic signals and the wideband background noise in high-speed train seismic source single-channel data, and the narrow-band high-speed train seismic source seismic signals are only kept to realize wideband background noise; and the operation is repeated until data in all channels are completed. The signal separation means such as morphological component analysis is introduced to high-speed train seismic source seismic signal processing, and wideband background noise suppression for the high-speed train seismic source seismic signals is realized.

Description

technical field [0001] The invention belongs to the technical field of seismic exploration data processing, and in particular relates to a method for suppressing broadband background noise of high-speed rail seismic source seismic signals. Background technique [0002] The vibration caused by the high-speed operation of high-speed trains may threaten the safety of buildings and engineering structures, and the engineering community regards it as a major hazard. However, the high-speed operation of high-speed rail trains also creates a new type of repeatable source—the high-speed rail source. Therefore, the acquisition and analysis of seismic waves excited by this new repeatable source-the high-speed rail source is not only possible to analyze the running status of the high-speed rail train, but also is expected to image the underground structure near the high-speed rail line. However, the actual collected data not only contains the seismic waves excited by the special high-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36
CPCG01V1/36G01V2210/32
Inventor 王晓凯陈文超师振盛陈建友
Owner XI AN JIAOTONG UNIV
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