Quick high-precision numerical simulation method for calculating fluctuating observation surface magnetic field

A numerical simulation and observation surface technology, which is applied in the field of arbitrary magnetic susceptibility distribution, fast and high-precision numerical simulation field of undulating observation surface magnetic field, can solve the problem of long calculation time, inability to meet the fine inversion imaging and calculation accuracy of large-scale airborne magnetic survey data low level problem

Active Publication Date: 2018-03-02
CENT SOUTH UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a fast and high-precision numerical simulation method for calculating the magnetic field of the undulating observation surface. The problem of fine inver

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  • Quick high-precision numerical simulation method for calculating fluctuating observation surface magnetic field
  • Quick high-precision numerical simulation method for calculating fluctuating observation surface magnetic field
  • Quick high-precision numerical simulation method for calculating fluctuating observation surface magnetic field

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[0087] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0088] Such as figure 1 as shown, figure 1 It is a flowchart of a fast and high-precision numerical simulation method for calculating the magnetic field of the undulating observation surface in the present invention. The present invention comprises the following steps:

[0089] Step 1: Complex magnetic body model representation:

[0090] Such as figure 2 As shown, determine the target area, establish a cuboid model containing all target areas, so that the target area including undulating terrain is completely embedded in the cuboid model; divide the cuboid model into several small cuboids, and the x, y, z of the cuboid model The number of divisions of the small cuboid in the direction is N x , N y , N z The side lengths in the ...

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Abstract

The invention provides a quick high-precision numerical simulation method for calculating a fluctuating observation surface magnetic field. According to the method, through the steps of complicated magnetic model expression, Gaussian parameter design, discrete offset wave number calculation, magnetization intensity calculation, wave number domain weighing coefficient calculation, two-dimensional discrete Fourier inversion and the like, unity of efficiency and precision of numerical simulation of the fluctuating observation surface magnetic field is realized. Through the method, the problems that current numerical simulation methods for the fluctuating observation surface magnetic field are low calculation precision and long in calculation time and cannot meet the requirement for fine inverse imaging of large-scale aeromagnetic survey data are solved, and the method is beneficial for carrying out research on three-dimensional magnetic susceptibility fine inverse imaging of the large-scale aeromagnetic survey data, human-computer interactive modeling and interpretation.

Description

technical field [0001] The invention relates to a numerical simulation method for airborne magnetic prospecting, in particular to a fast and high-precision numerical simulation method for arbitrary magnetic susceptibility distribution and undulating observation surface magnetic field. Background technique [0002] Revealing the distribution of physical properties and geological structure inside the earth is a basic scientific problem in geophysics research. In recent years, with the development of sensor technology and aerial measurement technology, the measurement range of the earth's magnetic field has become larger and higher, and the spatial resolution has become higher and higher, and the amount of data obtained has increased dramatically. data base. Inversion imaging for massive magnetic data poses a huge challenge to traditional inversion imaging methods. Efficient, high-precision, and high-resolution inversion imaging methods have become the research focus and diff...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2111/10
Inventor 李昆戴世坤陈轻蕊陈龙伟张钱江赵东东
Owner CENT SOUTH UNIV
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