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Quadrature calibration method and device of triaxial vector magnetometer

A calibration method and magnetometer technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of not being able to meet high-precision vector magnetic field detection and low calibration, so as to improve the accuracy of orthogonality measurement and improve Axial alignment accuracy, the effect of avoiding magnetic field interference

Active Publication Date: 2015-07-08
NAT SPACE SCI CENT CAS
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Problems solved by technology

[0008] The purpose of the present invention is to overcome the low calibration degree of the prior art three-axis vector magnetometer orthogonality calibration method, which cannot meet the needs of high-precision vector magnetic field detection, such as the needs of aerospace and aviation magnetic field surveying and mapping, Thereby a method and device for orthogonal calibration of a three-axis vector magnetometer are proposed

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  • Quadrature calibration method and device of triaxial vector magnetometer
  • Quadrature calibration method and device of triaxial vector magnetometer
  • Quadrature calibration method and device of triaxial vector magnetometer

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Embodiment Construction

[0044] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] The invention realizes the alignment between the reference direction of the probe and the direction of the external magnetic field by virtue of the precision-processed solenoid and the fixed tooling of the probe, and overcomes the difficulty that the error cannot be controlled by adjusting the alignment manually or by means of a non-magnetic turntable in the past. The mechanical axis of the three-axis vector magnetometer probe, that is, the axis of the coordinate system of the magnetometer probe structure, is used as the reference direction of the probe, so that the calibrated vector magnetic field direction can be measured.

[0046] Explanation of several terms in the present invention: Probe structure coordinate system: the external nominal of the three-axis vector magnetometer probe, the orthogonal ...

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Abstract

The invention provides a quadrature calibration method and a quadrature calibration device of a triaxial vector magnetometer. The quadrature calibration device of the triaxial vector magnetometer quadrature is used for the alignment of a standard magnetic field and a reference direction in a quadrature calibration process of the magnetometer and comprises a shielding barrel, a solenoid coil, a cylinder-shaped probe installation platform and a working table. The shielding barrel is placed on the working platform, the solenoid coil is coaxially arranged by penetrating the center of the shielding barrel through a support, and the solenoid coil is used for providing the standard magnetic field. The solenoid coil is tightly stuck to the probe installation platform which is coaxially sleeved on the inner wall of the solenoid coil and the probe installation platform is movable and can be located in the inner portion of the solenoid coil and on an extension cord outside a solenoid coil axis. A groove which is used for placing a magnetometer probe is arranged in the center of the upper portion of the probe installation platform. The magnetometer probe is capable of moving as the probe installation platform along the extension cord outside the solenoid coil axis to an even magnetic field area in the inner portion of the solenoid coil in the calibration process.

Description

technical field [0001] The invention relates to the field of instrument measurement, in particular to an orthogonal calibration method and device for a three-axis vector magnetometer. Background technique [0002] A three-axis vector magnetometer is generally composed of three unidirectional component magnetic sensors (such as fluxgate sensors and magnetoresistive sensors) in an orthogonal layout. If it is assumed that the magnetic axes of the three sensors are completely orthogonal and the directions are known, then The three sensors detect three orthogonal components of the vector magnetic field, and the coordinate system can be transformed to any coordinate system according to the known direction. However, in fact, the directions of the magnetic axes of the three sensors are invisible and unmeasurable, so the mechanical axes of the three sensors are often referred to as their magnetic axes in applications, and errors in the structure processing, installation and sensor ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/00
Inventor 周斌王劲东赵华
Owner NAT SPACE SCI CENT CAS
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