Magnetic gradient tensor positioning method based on symmetrical configuration plane array of tri-axial magnetometer shaped like Chinese character 'ri'

Abstract

The invention discloses a magnetic gradient tensor positioning method based on a symmetrical configuration plane array of a tri-axial magnetometer shaped like a Chinese character 'ri', and belongs tothe technical field of magnetic target inversion. The method comprises the steps of configuring six three-axis magnetometers according to a specific configuration, so that sensitive axes of the related three-axis magnetometers are symmetrical about points O, O1 and O2 to form a symmetrical configuration plane array; synchronously acquiring measurement outputs of the six three-axis magnetometers byusing a multi-channel data acquisition system, converting the measurement outputs into a resolving coordinate system to obtain independent component values for calculating magnetic gradient tensors at symmetric points O, O1 and O2, constructing a corresponding magnetic gradient tensor matrix, and calculating a mean value of distances between a magnetic dipole and the symmetric points O, O1 and O2; calculating a position coordinate value x of the magnetic dipole; calculating a unary quadratic equation by utilizing a bisection method according to the coordinates; abandoning complex roots, solving a difference value set corresponding to the remaining real roots, selecting an equation correct solution according to a minimum difference value principle, and obtaining the position coordinates yand z of the magnetic dipole. The method is small in calculation amount and can realize quick positioning.

Description

technical field [0001] The invention relates to a magnetic gradient tensor positioning method based on a Japanese-shaped three-axis magnetometer symmetrically arranged in a planar array, and belongs to the technical field of magnetic target inversion. Background technique [0002] The magnetic target location based on the gradient tensor uses the magnetic gradient tensor as the source of magnetic field information, and uses appropriate algorithms to process the magnetic field confidence to infer the target position that causes the magnetic anomaly. Therefore, it is important in both civilian and military applications. Value. Different from the total magnetic field measurement, the three-component magnetic field measurement and the magnetic field gradient measurement, the object of the magnetic gradient tensor measurement is the gradient of the magnetic field component, which is not affected by the total field measurement, and the measured results can reflect the magnetic mom...

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Problems solved by technology

[0004] The purpose of the present invention is to propose a magnetic gradient tensor positioning method based on a Japanese-shaped three-axis magnetometer symmetrical configuration planar array, which has solved the problems existing in the above-mentioned existing magnetic gradient tensor positioning method

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