System correction and magnetic interference compensation and fusion method for airborne fluxgate magnetic gradient tensiometer

A magnetic gradient tensor and fusion method technology, applied in the field of magnetic interference compensation, can solve the problems of not considering eddy current magnetic interference, no coverage, and difficulty in ensuring data quality.

Active Publication Date: 2017-01-25
JILIN UNIV
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Problems solved by technology

The model in this method does not cover all the error factors of the fluxgate tensor, nor does it consider the eddy current magnetic interference in the magnetic interference, etc. In the application of aviation, where the carrier moves quickly, it is difficult to ensure the quality of the compensated data

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  • System correction and magnetic interference compensation and fusion method for airborne fluxgate magnetic gradient tensiometer
  • System correction and magnetic interference compensation and fusion method for airborne fluxgate magnetic gradient tensiometer
  • System correction and magnetic interference compensation and fusion method for airborne fluxgate magnetic gradient tensiometer

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Embodiment Construction

[0055] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0056] The present invention first establishes the aircraft magnetic interference model and the single fluxgate error-free model respectively, and then fuses the two models into a single fluxgate correction and compensation model, and establishes the magnetic gradient according to the structure of the fluxgate tensor and through the discretization method of the continuous equation Tensor component correction and compensation model. Finally, the gradient tensor of the geomagnetic field in the high altitude is approximately zero for correction, and the correction coefficients of each gradient component are calculated. Four fluxgates are arranged in a "ten" structure to form a Taking the magnetic gradient tensor instrument as an example, it provides a calibration and compensation method for measurement applications after being loaded by an aircraf...

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Abstract

The invention relates to a system correction and magnetic interference compensation and fusion method for an airborne fluxgate magnetic gradient tensiometer. The method comprises the following steps: establishing an aircraft magnetic interference mode, establishing a single fluxgate error model, fusing the magnetic interference model and the fluxgate error model, establishing a magnetic gradient tensor component correction and compensation model, acquiring correction data from a uniform magnetic field area in the air, resolving a magnetic gradient tensor correction coefficient and inputting the measurement value and correction parameter of a three-axis fluxgate magnetic file into the magnetic gradient tensor component correction model, and calculating the corrected and compensated magnetic gradient tensor. The method provided by the invention has the advantages of completely covering the error factors of the airborne fluxgate magnetic gradient tensiometer and the aircraft magnetic interference type, expressing and solving in the correction model uniformly, realizing the solution of fusion of two problems of correction and compensation, and simultaneously completing the correction and compensation only by high-altitude correction and compensation flight. An iterative method is simple and practical, and a linear equation is solved by a least square method to ensure the correctness of the solution.

Description

Technical field: [0001] The invention relates to the correction of a magnetic surveying instrument and the magnetic interference compensation of an aircraft in aerial geophysical prospecting, in particular to the instrument system calibration and magnetic interference compensation required when a fluxgate magnetic gradient tensor is directly installed on an aircraft for detection. Background technique: [0002] The magnetic gradient tensor measures the spatial change rate of the three components of the magnetic field along the orthogonal coordinate system. The magnetic gradient tensor is less affected by the geomagnetism and can obtain rich information. It is especially suitable for discovering shallow hidden mines and magnetic moving targets. It is one of the development directions of magnetic measuring instruments. In the airborne magnetic gradient tensor measurement, in order to adapt to more aircraft and minimize the influence of the tensor instrument on the aerodynamic ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08G01N27/72G01V13/00
CPCG01N27/72G01V3/081G01V13/00
Inventor 随阳轶苗红松周志坚栾卉林君
Owner JILIN UNIV
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