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Exploration data signal de-noising method

A technology of data signal and processing method, applied in the field of geodetic exploration, can solve the problems affecting the accuracy of geodetic exploration, tectonic error, etc., and achieve the effects of improving the accuracy of the survey, reducing noise, and reducing errors

Inactive Publication Date: 2019-06-04
董鹏飞
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Problems solved by technology

The collected data signal is not analyzed and processed, because the collected data signal contains noise, and the noise has a greater impact on the low-frequency data signal, therefore, there are errors in the determined geodetic structure, which affects the accuracy of geodesic exploration

Method used

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Embodiment 1

[0013] This embodiment provides a method for denoising processing of exploration data signals, characterized in that: the method for denoising processing of exploration data signals includes the following steps:

[0014] First, determine the data signal of the sampling frequency in the data signal and the interference frequency corresponding to the noise;

[0015] Second, determine the number of decomposition layers according to the sampling frequency and interference frequency;

[0016] Third, determine the frequency band corresponding to each detail part in the frequency band corresponding to the approximate part;

[0017] Fourth, determine the interference frequency band where the interference frequency is located in the frequency band corresponding to the approximate part and the frequency band corresponding to each detail part;

[0018] Fifth, use the method selection method of soft filtering to filter the interference frequency to obtain the target part.

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Abstract

The invention discloses an exploration data signal de-noising method, which is characterized by comprising the following steps: 1, data signals of a sampling frequency in the data signals and an interference frequency corresponding to noise are determined; 2, decomposition layers are determined according to the sampling frequency and the interference frequency; 3, a frequency band corresponding toeach detail part in frequency bands corresponding to approximate parts is determined; 4, an interference frequency band of the interference frequency is determined in the frequency bands corresponding to the approximate parts and the frequency band corresponding to each detail part; and 5, a soft filtering method is used to filter the interference frequency to obtain a target part. The exploration data signal de-noising method has the advantages that after the data signals reflecting a magnetotelluric field are collected, the data signals are de-noised by adopting a wavelet analysis method, the noise of the target signal is reduced, the error of the determined geotectonics is greatly reduced, and the exploration accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of earth prospecting, and in particular provides a method for denoising processing of prospecting data signals. Background technique [0002] The geotectonics is extremely complex, with complex and changeable rock formations, and various complex geological structures such as faults and folds. In related technologies, traditionally, when conducting geodesic exploration, it is first necessary to collect data signals reflecting the magnetotelluric field, and then according to the collected data signal to determine the tectonics. The collected data signal is not analyzed and processed, because the collected data signal contains noise, and the noise has a greater impact on the data signal in the low frequency band. Therefore, there are errors in the determined geodetic structure, which affects the accuracy of geodesic exploration. Contents of the invention [0003] The object of the present invention is to sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/38
Inventor 董鹏飞
Owner 董鹏飞
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