Error compensation algorithm of geomagnetic sensor application system

A geomagnetic sensor and application system technology, which is applied in the directions of ground navigation, navigation calculation tools, etc., to achieve the effect of improving the accuracy of the heading angle test, and improving the effectiveness and accuracy

Inactive Publication Date: 2015-09-16
SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the model used for electronic magnetic compass measurement is based on the coordinate system and geographic coordinate system of the magnetic compass

Method used

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  • Error compensation algorithm of geomagnetic sensor application system
  • Error compensation algorithm of geomagnetic sensor application system
  • Error compensation algorithm of geomagnetic sensor application system

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Embodiment Construction

[0049] In order to make the content of the present invention clearer and easier to understand, the content of the present invention will be further described below in conjunction with the accompanying drawings. Of course, the present invention is not limited to this specific embodiment, and general replacements known to those skilled in the art are also covered within the protection scope of the present invention.

[0050] Secondly, the present invention is described in detail by means of schematic diagrams. When describing the examples of the present invention in detail, for the convenience of explanation, the schematic diagrams are not partially enlarged according to the general scale, which should not be used as a limitation of the present invention.

[0051] The following will combine Figure 1 ~ Figure 3 The error compensation algorithm applied to the geomagnetic sensor application system of the present invention will be further described in detail.

[0052] The error co...

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Abstract

The invention provides an error compensation algorithm of a geomagnetic sensor application system. After three spatial axial components of a current geomagnetic vector is obtained by a geomagnetic sensor, corresponding compensation of each axial component is carried out through a carrier interference magnetic field removal algorithm and a software filtering mode. The invention provides a method for measuring a course angle. The magnetic compensation value of each spatial axis obtained through the above error compensation algorithm is utilized, through an inclination angle corresponding to a current carrier obtained by an acceleration sensor and combined with the measured magnetic components in the spatial coordinate system and a depression angle and a roll angle measured by the acceleration sensor, components and magnetic course angles in X axis and Y axis in a corresponding horizontal coordinate system are calculated and finally the course angle of the carrier is obtained. Errors of the geomagnetic sensor application system caused by body coordinate distortion of a measuring result or complete annihilation in noise caused by influence of a magnetic interference source are prevented, and effectiveness and accuracy of magnetic signal compensation are raised.

Description

technical field [0001] The invention belongs to the design field of geomagnetic sensor application devices, and in particular relates to an error compensation algorithm of a geomagnetic sensor application system. Background technique [0002] With the continuous improvement of geomagnetic theory and the maturity of sensors, microprocessors and software algorithms, the use of magnetic detection technology to measure the spatial orientation of objects has become a hot spot in the field of geomagnetic navigation and attitude measurement. The electronic magnetic compass, that is, the geomagnetic sensor application system involved in the present invention, is the most commonly used test system for measuring direction by using the geomagnetic field, and is also one of the most commonly used applications of geomagnetic sensors. [0003] The demonstration platform of the present invention is a set of geomagnetic sensor application devices, with STM32 microprocessor as the main contr...

Claims

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Application Information

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IPC IPC(8): G01C21/08G01C21/20
CPCG01C21/08G01C21/20
Inventor 王勇
Owner SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT
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