A method and device for suppressing noise in aviation electromagnetic data

An aviation electromagnetic and noise suppression technology, which is applied in measurement devices, electrical/magnetic exploration, and special electrical/magnetic detection during transportation, etc., can solve problems such as difficulty in extracting abnormal information, and achieve excellent and effective noise suppression. suppressing effect

Active Publication Date: 2020-11-06
JILIN UNIV
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Problems solved by technology

[0005] The embodiment of the present invention provides a noise suppression method and device for aeronautical electromagnetic data, which solves the problem of difficulty in extracting abnormal information when the signal is submerged by late channel noise

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  • A method and device for suppressing noise in aviation electromagnetic data
  • A method and device for suppressing noise in aviation electromagnetic data
  • A method and device for suppressing noise in aviation electromagnetic data

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Embodiment Construction

[0056] 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.

[0057] The airborne electromagnetic data noise suppression method provided by the embodiment of the present invention is based on the principal component analysis algorithm (PCA) to decompose the profile data into principal components arranged according to the size of the variance; the residual noise. Methods include:

[0058] Based on a certain input data, the data is the original data after being collected. After the original data of the airborne electromagnetic is entered, the original data of the airborne electromagnetic is preprocessed to obtain the profile data of the survey line. Specifically, a survey line X(n×m) ...

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Abstract

The invention relates to the field of aeronautical electromagnetic data processing, and relates to a noise suppression method and device for aeronautical electromagnetic data. Based on principal component analysis, profile data is decomposed into principal components arranged according to the size of the variance; the minimum noise separation transformation is used to remove the low-order principal components. residual noise. In view of the high noise level of airborne electromagnetic trace profile data and the difficulty of extracting anomalies, the introduction of the theory of statistical analysis can not only completely remove the residual noise in the low-order principal components, but also effectively extract the anomaly information annihilated by noise in the low-order principal components , and it also avoids the problem that the abnormal information in the late channel is affected by the early channel caused by the direct realization of the minimum noise separation transformation, and realizes the effective suppression of the noise in the late channel.

Description

technical field [0001] The invention relates to the field of aeronautical electromagnetic data processing, in particular to a noise suppression method and device for aeronautical electromagnetic data. Background technique [0002] The airborne electromagnetic detection technology in the time domain adopts the airborne method and realizes large-depth and high-efficiency geophysical detection based on the principle of electromagnetic induction. It has the advantages of fast speed, low cost, good trafficability, and large-area coverage. It is widely used in basic geological surveys , mineral resource exploration, oil and gas exploration, and hydrology, engineering, environmental exploration and other fields. The airborne electromagnetic detection system is affected by environmental noise, system noise, and motion noise during flight detection, which interferes with the observation of airborne electromagnetic data and the extraction of effective signals, seriously affecting the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36
CPCG01V1/364G01V3/38G01V3/16
Inventor 朱凯光彭聪陆依明张琼王昊
Owner JILIN UNIV
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