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Calibration device and method for orthogonality and gain consistency of three-axis magnetic sensor

A sensor and three-axis magnetic technology, applied in the direction of measuring devices, instruments, measuring electrical variables, etc., can solve the problems of poor calibration accuracy, low efficiency, and complicated debugging process, and achieve the effect of improving calibration work efficiency and calibration accuracy

Active Publication Date: 2019-02-01
SHANGHAI MARINE EQUIP RES INST
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Problems solved by technology

It can be seen that the orthogonality debugging process of the three-axis magnetic sensor in the prior art is complicated, and only a single magnetic sensor can be calibrated each time, which is inefficient; the orthogonality and gain consistency error of the three-axis magnetic sensor reaches 1%, and the calibration poor precision

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  • Calibration device and method for orthogonality and gain consistency of three-axis magnetic sensor

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Such as figure 2 As shown, a set of calibration device for orthogonality and gain consistency of three-axis magnetic sensors used in this calibration method is mainly composed of four parts: a set of magnetic field simulation controller 1, magnetic field simulation control and calculation software loaded In the magnetic field simulation controller 1; a set of three-channel high-precision current source 2; a set of three-dimensional coils 3; a set of high-precision standard magnetometer 4, the high-precision standard magnetometer 4 is a standard magnetometer with qualified measurement. The three-dimensional coil 3 is composed of three sets of mutually orthogonal coils in the X direction, the Y direction and the Z direction. The standard magnetic sensor 5 and the three-axis magnetic sensor 6 to be calibrated (one or more) are fixed in the homogene...

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Abstract

The invention relates to a calibration device and a calibration method for the orthogonality and the gain consistency of a three-axis magnetic sensor. The device is composed of a magnetic field simulation controller, a three-channel high-precision current source, a three-dimensional coil, and a high-precision standard magnetometer. The method comprises the following steps of: controlling the magnitude and the direction of the energized current in the three-dimensional coil by the magnetic field simulation controller using the three-channel high-precision current source, actually measuring themagnetic field size H0 generated by the three-dimensional coil in a uniform region by the standard magnetometer, and transmitting the magnetic field size to the magnetic field simulation controller bythe standard magnetometer in a communication mode; measuring a three-axis magnetic field H1 by a three-axis magnetic sensor to be calibrated, recording the three-axis magnetic field H1 by the magnetic field simulation controller; repeating the second step n times, recording the magnetic field size H0 and the three-axis magnetic field H1 for each change; calculating the calibration parameter C' ofthe orthogonality and the gain consistency of the three-axis magnetic sensor by the magnetic field simulation controller using the arrays H0<n> and H1<n>; and calibrating the output magnetic field H1of the three-axis magnetic sensor using the parameter C' to obtain a calibrated magnetic field H0.

Description

technical field [0001] The invention relates to a three-axis magnetic sensor, in particular to a device and method for calibrating the orthogonality and gain consistency of the three-axis magnetic sensor. Background technique [0002] The three-axis magnetic sensor is composed of three single-axis vector magnetic sensors. In order to ensure that each component of the three-axis magnetic sensor accurately measures the magnetic field in each axis and avoid being affected by other axial magnetic fields, which affects the measurement accuracy, three single-axis magnetic sensors are required. The measurement direction of the sensor should be orthogonal, that is, the angle between each other in the structure is 90°; in addition, when the attitude of the three-axis magnetic sensor changes in a uniform magnetic field environment, in order to ensure the accuracy of the total magnetic field measured by the magnetic sensor , it is required that the gain of each component of the three-a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00
CPCG01R35/00
Inventor 陈征峰陆震唐自豪卞嘉辉丁卯梁凇
Owner SHANGHAI MARINE EQUIP RES INST
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