Magnet second-order Euler inversion method and scalar magnetometer array

A technology of magnetometer and inversion method, which is applied in magnetic sensor arrays, magnetic field measurement using the principle of magnetic flux control, magnetic gradient measurement, etc. It can solve problems such as solution divergence, influence of depth calculation results, and failure to consider geomagnetic background fields. , to achieve the effect of easy assembly

Active Publication Date: 2019-02-05
HARBIN ENG UNIV
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Problems solved by technology

[0004] The typical Euler deconvolution method is easy to cause severe divergence of the solution because it does not consider the influence of the geomagnetic background field. The common method to overcome this problem is to treat the background field in the moving window as a constant and solve the nonlinear equations. Given the exact construction of exponential linearization equations
The selection of structure index mostly depends on subjective experience. When the survey area contains multiple types of magnets, the structure index of magnets in each window is not easy to be given in advance; and the wrong structure index or the dynamic change of structure index will also lead to the divergence of the solution. , especially the depth calculation results are more affected by its

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  • Magnet second-order Euler inversion method and scalar magnetometer array
  • Magnet second-order Euler inversion method and scalar magnetometer array
  • Magnet second-order Euler inversion method and scalar magnetometer array

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Embodiment 1

[0049] A scalar magnetometer array for simultaneous measurement of first-order and second-order magnetic gradients. Its structure is composed of 13 identical scalar magnetometers. In three-dimensional space coordinates, the first magnetometer (0) is located at coordinates (0, 0,0), which is the measurement point, the second magnetometer (1) is located at coordinates (-0.3k l ,-0.4k l ,0), the third magnetometer (2) is located at coordinates (-0.5k l ,-0.2k l ,0), the fourth magnetometer (3) is located at coordinates (0.5k l ,0.2k l ,0), the fifth magnetometer (4) is located at coordinates (0.3k l ,0.4k l ,0), the sixth magnetometer (5) is located at coordinates (0,-0.3k l ,-0.4k l ), the seventh magnetometer (6) is located at coordinates (0,-0.5k l ,-0.2k l ), the eighth magnetometer (7) is located at coordinates (0,0.5k l ,0.2k l ), the ninth magnetometer (8) is located at coordinates (0,0.3k l ,0.4k l ), the tenth magnetometer (9) is located at coordinates (-0.3...

Embodiment 2

[0098] Second-Order Euler Inversion Method for Magnets and a Scalar Magnetometer Array

[0099] The invention belongs to the field of magnetic target inversion and geological exploration, and in particular relates to the second-order Euler inversion method of magnets and a scalar magnetometer array.

[0100] The detection and location of magnetic anomalies and their gradients play an important role in geological surveys, mineral surveys, earth science research, identification and location of unexploded explosives and military targets. The emergence of high-precision magnetometers has promoted the innovation of magnetic detection technology, and magnet positioning technology has also developed from traditional deep positioning such as curve matching and matched filtering to spatial positioning such as Euler deconvolution and signal analysis.

[0101] The Euler deconvolution method is an important method for processing and interpreting magnetic survey data. D.T.Thompson propose...

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Abstract

The invention provides a magnet second-order Euler inversion method and a scalar magnetometer array. 13 scalar magnetometers form a scalar magnetometer array, and a GPS or a high-precision inertial navigation system is installed; a search region of a magnet is determined, and the position coordinates of the magnet, estimated values of structural indexes and a mean value of total estimation valuesare calculated, and then a nearest neighbor integer value of the mean value is calculated to obtain an inversion value of the structural indexes of the magnet; solution center calculation and iterative screening are carried out on the position coordinate estimation values of the magnet on an updated Kth track section, so as to obtain an inversion value of the position coordinates of the magnet. According to the method, magnetometer array assembling and plane unit replacement are facilitated, and the position coordinates and the structural indexes of the magnet are simultaneously inverted by afirst-order magnetic gradient value and a second-order magnetic gradient value at a plurality of measuring points, the influence of a gross measurement error of the magnetic gradient on the inversionprecision is reduced, and subjective experience selection of the structural indexes and centralization processing of the gradient measurement data are avoided.

Description

technical field [0001] The invention belongs to the field of magnetic target inversion and geological exploration, and in particular relates to a second-order Euler inversion method of a magnet and a scalar magnetometer array. Background technique [0002] The detection and location of magnetic anomalies and their gradients play an important role in geological surveys, mineral surveys, earth science research, identification and location of unexploded explosives and military targets. The emergence of high-precision magnetometers has promoted the innovation of magnetic detection technology, and magnet positioning technology has also developed from traditional deep positioning such as curve matching and matched filtering to spatial positioning such as Euler deconvolution and signal analysis. [0003] The Euler deconvolution method is an important method for processing and interpreting magnetic survey data. D.T.Thompson proposed to use the Euler method, that is, to locate the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/00G01R33/022
CPCG01R33/0094G01R33/022
Inventor 黄玉武立华万博文高俊奇沈莹于强
Owner HARBIN ENG UNIV
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