Simple geomagnetic vector measurement method

A measurement method and vector technology, which can be used in geophysical measurements, measurement devices, radio wave measurement systems, etc., and can solve problems such as poor measurement accuracy

Inactive Publication Date: 2012-08-15
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0005] In order to overcome the shortcomings of poor measurement accuracy of existing geomagnetic vec

Method used

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Embodiment Construction

[0106] refer to Figure 1-8 . The device used in the simple geomagnetic navigation method of the present invention includes a magnetometer 1, a support 2, a trolley 3 and an inertial guide 4. The magnetometer 1 is fixed on the support 2 and placed on the trolley 3 together with the inertial guide 4.

[0107] The concrete steps of the inventive method are as follows:

[0108] In the first step, the quaternion represents the coordinate system rotation method.

[0109] The mathematical concept of quaternion was first proposed by Hamilton in 1843, and it is one of the contents of algebra. With the development of strapdown inertial navigation technology, in order to describe the angular motion of rigid bodies more easily, the mathematical tool of quaternion is adopted, and it is used to make up for the three Euler angle parameters that usually describe the angular motion of rigid bodies in the design of control systems. lack of time. The quaternion can describe the rotation of ...

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Abstract

The invention discloses a simple geomagnetic vector measurement method, which is used for solving the technical problem that the existing geomagnetic vector measurement method is poor in measurement accuracy. The technical scheme is as follows: the method comprises the following steps of: measuring geomagnetic vector information of a spatial point by using a magnetometer; carrying out error analysis and correction on the geomagnetic vector information measured by the magnetometer by using an error compensation model; and converting the geomagnetic vector obtained after correction into a geographic coordinate system through a coordinate conversion method so as to finally obtain the relatively accurate geomagnetic vector information of a measurement point. When the total magnetic field intensity H is equal to 51,800nT and a magnetic dip alpha is equal to 48 degrees, an error between a celestial magnetic field component obtained through geomagnetic vector measurement at the measurement point and a theoretical celestial magnetic field component is effectively controlled within 50nT.

Description

technical field [0001] The invention relates to a geomagnetic vector measurement method, in particular to a simple geomagnetic vector measurement method. Background technique [0002] The geomagnetic field is a vector field, an inherent resource of the earth, and has the characteristics of all-time, all-weather, and all-region. The geomagnetic vector at any point in the Earth's near-Earth space is unique, and theoretically corresponds to the longitude and latitude of the point one by one. With the rapid development of science and technology, through the measurement and numerical processing of the geomagnetic vector, the establishment of corresponding numerical models, and the analysis and study of the temporal and spatial distribution characteristics of the magnetic field, the geomagnetic vector information can be widely used in many disciplines. [0003] For example, in the field of geomagnetic navigation, as long as the geomagnetic vector information of each point is accu...

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Application Information

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IPC IPC(8): G01V3/40
Inventor 葛致磊周凤岐雷泷杰薄隆
Owner NORTHWESTERN POLYTECHNICAL UNIV
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