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Method for determining geomagnetic positioning array aperture

A positioning array and aperture technology, applied in ground navigation, navigation calculation tools, etc., can solve the problems of low resolution of vector sensors and not too far measurement distance, and achieve the effect of improving mobility and reliability, and convenient deployment

Active Publication Date: 2017-06-30
HARBIN ENG UNIV
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Problems solved by technology

At the same time, due to the influence of the change of the geomagnetic field with time, and the resolution of the vector sensor itself is generally not high, the measurement distance cannot be too far

Method used

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  • Method for determining geomagnetic positioning array aperture
  • Method for determining geomagnetic positioning array aperture
  • Method for determining geomagnetic positioning array aperture

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Embodiment Construction

[0042] The invention proposes a theoretical method and an actual determination principle for the optimum aperture value of the array, so as to realize high-precision tracking and positioning of the magnetic target. The aperture is the distance from each sensor of the array to the center of the array, which characterizes the size of the spatial scale of the array. The present invention realizes the positioning of the magnetic target through the total geomagnetic field sensor array, obtains the relationship between the array aperture and the target positioning accuracy according to the total geomagnetic field positioning theory, and proposes the principle and specific method for determining the optimal aperture on the basis of meeting the positioning accuracy requirements. Under the premise of meeting the positioning accuracy requirements, the positioner can choose the smallest array to locate the magnetic target, which makes the array layout convenient, improves the mobility and...

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Abstract

The invention provides a method for determining geomagnetic positioning array aperture. The method comprises steps as follows: step one, geomagnetic sensor arrays comprising scalar magnetic sensors are constructed, and geomagnetic total field intensity is recorded by the scalar magnetic sensors; step two, a time and space double-difference function of two scalar magnetic sensors is calculated; step three, a hybrid partial derivative of the double-difference function on a certain coordinate variable and an array aperture variable is solved, the hybrid partial derivative is enabled to be equal to zero for a certain specific coordinate variable, and theoretical optimal array aperture of the specific position is solved; step four, actual optimal array aperture is determined according to environmental noise and positioning precision. According to the method for determining the geomagnetic positioning array aperture, a positioner can select the minimum array to position a magnetic target on the premise that the positioning precision requirement is met, so that the array layout is convenient, motility and reliability of the geomagnetic positioning array are improved, and the arrays are more practical.

Description

technical field [0001] The invention relates to a method for tracking and locating a magnetic target, in particular to a method for determining the optimal aperture of an array. Background technique [0002] 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 over time, the geomagnetic field that changes rapidly over time is called the changing magnetic field of the earth, and the geomagnetic field that changes slowly or basically remains unchanged over time is called the stable magnetic field of the earth. [0003] The geomagnetic field is an important physical quantity that reflects the evolution of the universe, the evolution of the earth, the evolution of geological structures, and seismic activity. The use of magnetic fields to locate targets has important application significance in geological monit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/08G01C21/20
CPCG01C21/08G01C21/20
Inventor 康崇樊黎明郑权康曦元周健张晓峻
Owner HARBIN ENG UNIV
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