Magnetic target tracking method based on magnetic anomaly gradient

A technology for magnetic targets and magnetic anomalies, applied in the field of magnetic detection, which can solve the problems of low resolution of vector sensors and the measurement distance cannot be too far.

Active Publication Date: 2017-10-20
HARBIN ENG UNIV
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At the same time, due to the influence of the change of the geomagnetic field with time, and the res

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  • Magnetic target tracking method based on magnetic anomaly gradient
  • Magnetic target tracking method based on magnetic anomaly gradient
  • Magnetic target tracking method based on magnetic anomaly gradient

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[0048] The present invention will be further described below in conjunction with accompanying drawing:

[0049] The invention relates to a magnetic target tracking method based on magnetic anomaly gradient. The method first calculates the gradient of geomagnetic anomaly by building a magnetometer array and based on the geomagnetic total field positioning theory. The unit direction vector of the target magnetic moment is separated by the matrix transformation of the magnetic anomaly gradient, and then an optimization problem is formulated to estimate the position and magnetic parameters of the target. Finally, a special fitness function is constructed, and the particle swarm optimization algorithm is used to realize the target parameters. solve.

[0050]The magnetic gradiometer contains 6 total field magnetometers, the baseline length is 4m, the center of the magnetometer is located in the center of the coordinate system, and each magnetometer is 2m away from the center. At th...

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Abstract

The invention provides a magnetic target tracking method based on a magnetic anomaly gradient. Through carrying out matrix transformation on the magnetic anomaly gradient, a unit direction vector of a target magnetic moment is separated, an optimization problem is formulated to estimate the position and magnetic parameters of the target, and through constructing a special fitness function, a particle swarm optimization algorithm is used to solve the target parameters. According to the target tracking method based on the magnetic anomaly gradient, a new idea is provided for target positioning by using geomagnetic total field information, the method can solve the information of moving target velocity, and certain reference meaning is realized in positioning and tracking of the magnetic target.

Description

technical field [0001] The invention belongs to the technical field of magnetic detection, and in particular relates to a magnetic target tracking method based on magnetic anomaly gradients. Background technique [0002] Due to the magnetization of the earth's magnetic field, substances containing ferromagnetic materials can superimpose a magnetic field on the earth's magnetic field, that is, produce magnetic anomalies. By measuring the information of these magnetic anomalies, the location and tracking of these ferromagnetic substances can be realized by inversion. This method has been widely used in geological exploration, unexploded ordnance detection, target positioning, navigation and other directions. [0003] The geomagnetic field is a natural physical field of the earth, which is formed by the superposition of magnetic field components with different changing laws. Considering the change characteristics of the geomagnetic field with time, the geomagnetic field that ...

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Application Information

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IPC IPC(8): G01V3/08
CPCG01V3/081
Inventor 康崇樊黎明郑权康曦元周健张晓峻
Owner HARBIN ENG UNIV
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