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TSP multi-wave-field separation and noise suppression method based on KL-DSW

A technology of noise suppression and wave field separation, applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as difficulty in separating effective wave signals, inability to perform long-distance, high-precision tunnel advance detection, etc.

Active Publication Date: 2020-10-27
ZHONGYUAN ENGINEERING COLLEGE
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a KL-DSW-based TSP multi-wave field separation and noise suppression method to solve the problem that it is difficult to separate the effective wave signal, and then it is impossible to perform long-distance, high-precision tunnel advanced detection

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  • TSP multi-wave-field separation and noise suppression method based on KL-DSW
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  • TSP multi-wave-field separation and noise suppression method based on KL-DSW

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[0044] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0045] In this embodiment, the Y(t) component record in the three-component record is processed, and the Y(t) component record with Gaussian noise is added as figure 1 As shown in (a), the recording time is 500ms and the sampling rate is 16000Hz.

[0046]A KL-DSW-based TSP multi-wave field separation and noise suppression method, including:

[0047] Select a rectangular time window containing the target signal from the acquired seismic record;

[0048] Calculate the delay parameters between each record and the first record by cross-correlation method;

[0049] Level the event axis of the target signal based on the first ...

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Abstract

The invention belongs to the technical field of wave field separation and random noise suppression in tunnel advanced geological prediction, and particularly relates to a TSP multi-wave-field separation and noise suppression method based on KL-DSW. The method comprises the steps: selecting a rectangular time window containing a target signal from collected seismic records; calculating time delay parameters of each record and the first record through a cross-correlation method; leveling the event of the target signal by taking the first record as a reference; superposing the leveled target signals by adopting a uniform weighting mode; extracting coherent signals from the superposed records through a KL transformation method; and obtaining a target signal at a correct position through reverse time delay correction. The problems that effective wave signals are difficult to separate and long-distance and high-precision tunnel advanced detection cannot be carried out are solved.

Description

technical field [0001] The invention belongs to the technical field of wave field separation and random noise suppression in tunnel geological forecasting, and specifically relates to a KL-DSW-based TSP multi-wave field separation and noise suppression method. Background technique [0002] TSP is a multi-wave, multi-component, high-resolution seismic reflection wave detection technology using multi-point excitation and single-point reception. It is a common method in tunnel geological prediction. However, when the TSP acquisition system receives the target signal, it will also receive clutter interference from other directions, making the wave field extremely complex and difficult to effectively separate the effective signal; this will seriously affect the accuracy and reliability of the tunnel's advanced detection results and rock formation. The accuracy of the performance analysis may easily cause unnecessary economic losses and delays in the construction period. At prese...

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Application Information

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IPC IPC(8): G01V1/36
CPCG01V1/36G01V2210/324G01V2210/48
Inventor 岳永高韩春杨军张妍青任东旭陈永骞李峥峰刘嘉霖
Owner ZHONGYUAN ENGINEERING COLLEGE
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