Method and system for dynamically calibrating magnetic field sensor

A magnetic field sensor and dynamic calibration technology, applied in the field of magnetic field sensors, can solve the problems of high price, high cost, and difficult static calibration to achieve good results, and achieve reliable calibration results, small amount of data processing, ensuring reliability and correctness effect

Inactive Publication Date: 2018-06-22
SUZHOU JIEYANXIN NANO TECH CO LTD
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Problems solved by technology

However, this special turntable equipment is expensive and the cost is high; and in practical applications, with the change of the surrounding environment and the aging

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  • Method and system for dynamically calibrating magnetic field sensor
  • Method and system for dynamically calibrating magnetic field sensor
  • Method and system for dynamically calibrating magnetic field sensor

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Embodiment Construction

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0060] Such as figure 1 As shown, a method for dynamically calibrating a magnetic field sensor includes the following steps:

[0061] Step S1, sequentially storing the original three-dimensional magnetic field data of the magnetic field sensor in a queue of length L;

[0062] Step S2, finding N data satisfying preset conditions from the data in the queue whose length is L as a fitting array for ellipsoid fitting operation;

[0063] Step S3, performing an ell...

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Abstract

The invention provides a method for dynamically calibrating a magnetic field sensor. The method comprises the following steps: storing original three-dimensional magnetic field data of the magnetic field sensor into a queue with a length of L in sequence; searching out N data meeting a preset condition from the data in the queue with the length of L, and forming a fitting array for ellipsoid fitting operation by the N data; performing the ellipsoid fitting operation according to the fitting array of the N data to fit out six calibration fitting parameters of an ellipsoid; calibrating the original three-dimensional magnetic field data by using the six calibration fitting parameters, so as to acquiree calibrated magnetic field data, and returning to the initial step. The invention provides asystem for dynamically calibrating the magnetic field sensor. The method and the system for dynamically calibrating the magnetic field sensor can dynamically calibrate the magnetic field sensor in real time, and a calibration result is high in reliability and precision.

Description

technical field [0001] The present invention relates to magnetic field sensors, and more particularly to methods and systems for dynamically calibrating magnetic field sensors. Background technique [0002] Magnetic field sensors use the inherent directivity of the earth's magnetic field to measure the three-dimensional attitude of the carrier, and are widely used in various fields, such as drones, robots, mobile phones, etc. Due to the hardware size, cost, application environment and other factors of the magnetic field sensor, the accuracy and stability of the magnetic field sensor are not high, so the magnetic field sensor needs to be calibrated. [0003] The existing calibration method generally uses a special turntable device to rotate the device to obtain fitting parameters before the magnetic field sensor leaves the factory, and then calibrates it. However, this special turntable equipment is expensive and the cost is high; and in practical applications, with the chan...

Claims

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 王建国申亚琪张克磊葛国庆
Owner SUZHOU JIEYANXIN NANO TECH CO LTD
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