Method and device for obtaining accurate aeromagnetic survey data based on Tilt method

An airborne magnetic survey and data technology, applied in the field of airborne magnetic survey, can solve problems such as unstable calculation results, affecting application results, and low lateral resolution, and achieve the goals of improving calculation stability, eliminating boundary interference, and enhancing signal-to-noise ratio Effect

Active Publication Date: 2021-04-16
中国自然资源航空物探遥感中心
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Problems solved by technology

[0007] Based on this, the inventors of the present application found that the Tilt method has low horizontal resolution, poor precision and easy to generate false abnormal boundaries in practical applications, and when the denominator or close to 0, there is an "analytic singularity" in the Tilt method, which will make the calculation result unstable and affect the actual application effect

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  • Method and device for obtaining accurate aeromagnetic survey data based on Tilt method

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[0027] 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.

[0028] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation or position indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore It should not be ...

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Abstract

The invention discloses a method and device for obtaining accurate aeromagnetic survey data based on a Tilt method, and the method comprises the steps: calculating the horizontal gradient of a horizontal gradient in an x direction in a y direction and the vertical gradient in a z direction according to the aeromagnetic survey data T, and calculating the total horizontal gradient THDR according to the horizontal gradient in the x direction and the horizontal gradient in the y direction, and calculating a z-direction vertical gradient average value Wmean (VDR) and a total horizontal gradient average value Wmean (THDR) according to the z-direction vertical gradient and the total horizontal gradient THDR, and obtaining accurate aerial magnetic measurement data according to the z-direction vertical gradient average value VDR, the total horizontal gradient THDR, the z-direction vertical gradient average value Wmean (VDR) and the total horizontal gradient average value Wmean (THDR). According to the method and device for obtaining the accurate aeromagnetic survey data and the storage medium, the problem of singular point analysis existing in a Tilt method can be solved, the calculation stability is improved, boundary interference of geologic bodies generating false aeromagnetic data is eliminated, the signal-to-noise ratio is increased, and the aeromagnetic data processing and conversion quality and the geologic body boundary recognition effect are improved.

Description

technical field [0001] The invention relates to the technical field of aeromagnetic survey, in particular to a method and a device for obtaining accurate aeromagnetic survey data based on the Tilt 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 plane. However, due to the error...

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Application Information

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IPC IPC(8): G01V3/165G01V3/40G01V3/38G01V3/08
Inventor 王明王林飞熊盛青林晓星梁盛军
Owner 中国自然资源航空物探遥感中心
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