Online error compensation method and online error compensation system for two-axis magnetometer
An error compensation and magnetometer technology, applied in the field of magnetometers, can solve problems such as inapplicability of online compensation, and achieve the effect of small calculation amount, compensation of its own zero bias error, and online error compensation.
Active Publication Date: 2016-08-17
TSINGHUA UNIV
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Problems solved by technology
[0003] Many magnetometer error calibration methods currently appearing, such as swing method, ellipse fitting method, maximum and minimum value method, twelve position method, etc., can only calibrate the magnetometer error off-line, and require a turntable to provide a reference, or according to the regulations To complete the calibration process, it is not suitable for online compensation
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[0028] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0029] A method and system for online error compensation of a two-axis magnetometer according to an embodiment of the present invention will be described below with reference to the accompanying drawings.
[0030] figure 1 It is a flow chart of an online error compensation method for a two-axis magnetometer according to an embodiment of the present invention. Such as figure 1 As shown, the method includes the following steps:
[0031] Step S1: providing a two-axis magnetometer and a magnetometer data acquisition device, and fixing the...
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The invention provides an online error compensation method and an online error compensation system for a two-axis magnetometer. The online error compensation method comprises the following steps: providing the two-axis magnetometer and a magnetometer data collection device, and fixing the two-axis magnetometer and the magnetometer data collection device on a rotating table; setting and storing the rotating speed and the rotating angle of the rotating table; carrying out continuous electrification on the two-axis magnetometer for a preset time, and storing operation data; collecting output data of the two-axis magnetometer according to the rotating speed and the rotating angle of the rotating table, and storing the output data; and establishing an online error compensation model of the two-axis magnetometer, calculating the output data by virtue of the online error compensation model so as to obtain an data error, and carrying out error compensation on the output data according to the data error. According to the method and the system, the hard magnetic disturbance of a carrier and the zero offset error of the magnetometer can be effectively compensated.
Description
technical field [0001] The invention relates to the technical field of magnetometers, in particular to an online error compensation method and system for a two-axis magnetometer. Background technique [0002] Magnetometers provide attitude information through sensitive geomagnetic fields. Due to their simple structure, small size, low cost, low power consumption, good shielding, and weather resistance, they are widely used in the field of navigation. However, since the magnetometer is easily affected by installation errors and external disturbances, the resulting navigation error is relatively large. Therefore, error compensation needs to be performed in the process of using the magnetometer to provide attitude information. Carrier magnetic interference mainly includes hard magnetic interference, soft magnetic interference and eddy current magnetic interference. The error of the geomagnetic sensor itself is mainly caused by the manufacturing error and the installation error...
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IPC IPC(8): G01C25/00
CPCG01C25/00
Inventor 李滨陈湾湾尤政杨登邢飞
Owner TSINGHUA UNIV