Magnetometer calibration method and device

A calibration method and magnetometer technology, applied in measuring devices, measuring magnetic variables, instruments, etc., to achieve the effects of high accuracy, comprehensive calibration parameters, and stable environment

Active Publication Date: 2018-03-30
GEER TECH CO LTD
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  • Abstract
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Problems solved by technology

[0002] In the past, the magnetometer calibration was a plane calibration method or a figure-of-eight calibration method to eliminate the soft magnetic effect and hard magnetic effect in the environment, but the above calibration method is only an env

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  • Magnetometer calibration method and device
  • Magnetometer calibration method and device

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Embodiment Construction

[0044] Core idea of ​​the present invention is:

[0045] The inventor thought of a magnetometer calibration method, which is to put the magnetometer to be calibrated into a three-dimensional magnetic field with a constant magnetic field intensity, and make each of the three axes of the magnetometer parallel to the direction of the magnetic field lines of the three-dimensional magnetic field placing, so as to obtain the output values ​​corresponding to at least four different placement directions of the magnetometer, and then according to the corresponding output values ​​of the magnetometer in the at least four different placement directions and the magnetic field strength value of the three-dimensional magnetic field, Calculating the calibration parameters of the magnetometer to complete the calibration of the magnetometer.

[0046] In order to make the purpose, technical solutions and advantages of the present invention clearer, the implementation of the present invention wi...

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Abstract

The invention discloses a magnetometer calibration method. The method comprises the steps of placing a magnetometer to be calibrated in a three-dimensional magnetic field with the magnetic field strength being constant, and respectively enabling each of the three axes of the magnetometer to be placed in a mode of being parallel to a magnetic induction line direction of the three-dimensional magnetic field; acquiring output values corresponding to at least four different placement directions of the magnetometer; and calculating a calibration parameter of the magnetometer according to the outputvalues corresponding to at least four different placement directions of the magnetometer and a magnetic field strength value of the three-dimensional magnetic field so as to complete calibration forthe magnetometer. The magnetometer calibration scheme disclosed by the invention is stable in calibration implementation experimental environment, comprehensive in calibration parameter and higher inaccuracy and calibration speed compared with a single-axis calibration scheme, can eliminate an instrument error of the magnetometer and achieves chip-level three-axis simultaneous calibration for themagnetometer.

Description

technical field [0001] The invention relates to the field of magnetometer calibration, in particular to a magnetometer calibration method and device. Background technique [0002] In the past, the magnetometer calibration was a plane calibration method or a figure-of-eight calibration method to eliminate the soft magnetic effect and hard magnetic effect in the environment, but the above calibration method is only an environmental calibration method. It needs to be recalibrated, and the accuracy of the calibration is based on the assumption that the output data of the magnetometer is accurate, so how to judge whether the output data of the magnetometer is accurate? Contents of the invention [0003] In view of the above problems, the present invention is proposed to provide a magnetometer calibration method and device that overcome the above problems or at least partially solve the above problems. [0004] According to one aspect of the present invention, a magnetometer ca...

Claims

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Application Information

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IPC IPC(8): G01R35/00
CPCG01R33/0035
Inventor 单体江陈维亮
Owner GEER TECH CO LTD
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