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

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

Active Publication Date: 2021-08-24
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 existing normalized standard deviation method has low resolution, poor precision and easy to produce false abnormal boundaries in practical applications, and when the denominator or close to 0, there is an "analytic singularity" in the normalized standard deviation 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 standard deviation method

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[0035] 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.

[0036] 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 a device for obtaining accurate aeromagnetic survey data based on a standard deviation method. The method includes: calculating the horizontal gradient of the aeromagnetic survey data T in the x direction, the horizontal gradient in the y direction, and the vertical gradient in the z direction according to the aeromagnetic survey data T. Calculate the standard deviation S of the horizontal gradient in the x direction to the gradient x , the standard deviation S of the horizontal gradient in the y direction y and the standard deviation S of the vertical gradient in the z direction z And the sum S of the standard deviations in the x direction, y direction, and z direction 0 ; According to the standard deviation S of the vertical gradient in the z direction z Calculate the standard deviation S of the vertical gradient in the z direction z Mean Wmean(S z ), and the sum S of standard deviations according to the x direction, y direction, and z direction 0 Calculate the standard deviation S 0 Mean Wmean(S 0 ); Accurate aeromagnetic survey data are obtained according to the above calculation. The method and device for obtaining accurate aeromagnetic measurement data based on the standard deviation method provided by the present invention can solve the problem of "analytic singularity" in the NSTD method, improve calculation stability, enhance the signal-to-noise ratio, and improve the quality of aeromagnetic data processing and conversion and geological body boundary recognition effect.

Description

technical field [0001] The invention relates to the technical field of aeromagnetic survey, in particular to a method and a device for acquiring accurate aeromagnetic survey data based on a standard deviation 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 ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/38G01V3/40G01V3/165G01V3/08G01V13/00
Inventor 王明熊盛青王林飞梁盛军林晓星
Owner 中国自然资源航空物探遥感中心
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