Aeromagnetic boundary detection method and device based on theta Map method based on tensor eigenvalues

A boundary detection and eigenvalue technology, applied in the field of aeromagnetic survey, can solve problems such as easy to generate false abnormal boundaries, affect the actual application effect, and unstable calculation results, so as to improve the enhancement and extraction capabilities, avoid interference, and achieve high resolution and the effect of precision

Active Publication Date: 2022-04-15
中国自然资源航空物探遥感中心
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Problems solved by technology

[0006] Based on this, the inventors of the present application found that the existing Theta Map method of Theta Map is affected by the magnetic anomaly component and magnetization direction to a certain extent in practical applications, has low resolution and is prone to false anomaly boundaries, and when the denominator or close to 0, there is an "analytic singularity" in the Theta Map method, which will make the calculation result unstable and affect the actual application effect

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  • Aeromagnetic boundary detection method and device based on theta Map method based on tensor eigenvalues
  • Aeromagnetic boundary detection method and device based on theta Map method based on tensor eigenvalues
  • Aeromagnetic boundary detection method and device based on theta Map method based on tensor eigenvalues

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[0047] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0048] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0049]An embodiment of the present invention provides an aeromagnetic boundary detection method based on the tensor eigenvalue Theta Map method, see figure 1 , which is a flow chart of the aeromagnetic boundary detection method based on the tensor eigenvalue Theta Map method, including: step S1-step S4.

[0050] Step 1, obtain the full magnetic gradient tensor data matrix M, wherein, the full magnetic gradient tensor data ...

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Abstract

The invention discloses an aeromagnetic boundary detection method, device and storage medium based on the tensor eigenvalue Theta Map method. The method includes: obtaining a full magnetic gradient tensor data matrix M; establishing a boundary detection function E and a depth resolution gain according to M Factor M z ;Respectively calculate the horizontal gradient E of E in the x direction x , the horizontal gradient E in the y direction y and the vertical gradient E in the z direction z ;according to E x ,E y and E z Calculate the total horizontal gradient THDR and the total gradient modulus ASM; according to THDR, ASM, M z , M, realize aeromagnetic boundary detection. The aeromagnetic boundary detection method, device and storage medium of the Theta Map method based on tensor eigenvalues ​​provided by the present invention can solve the problem of "analytic singularity" in the Theta Map method, improve calculation stability, eliminate false interference information, and enhance the signal-to-noise ratio. And improve the quality of aeromagnetic data processing and transformation and the recognition effect of geological body boundaries.

Description

technical field [0001] The invention relates to the technical field of aeromagnetic surveying, in particular to an aeromagnetic boundary detection method and device based on tensor eigenvalues ​​using the Theta Map method. Background technique [0002] Airborne magnetic measurement is to install the airborne magnetometer (such as optical pump type, nuclear rotary type and fluxgate type) system on the aircraft, and observe the parameters of the earth's magnetic field (such as the total strength of the earth's magnetic field T or the anomaly of the total magnetic field ΔT or its gradient ), to find magnetic or magnetic-related ore bodies, to understand geological structures, to conduct magnetic mapping, to solve problems of urban and engineering stability, and archaeology. [0003] Airborne magnetic survey data is a comprehensive reflection of the magnetic field information of magnetic geological bodies of different depths, shapes, and scales on the observation surface. Howev...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/10G06F17/13G06F17/16
CPCG06F17/10G06F17/13G06F17/16
Inventor 王明熊盛青王林飞张加洪屈进红
Owner 中国自然资源航空物探遥感中心
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