A method of calibrating a magnetometer
A magnetometer and calibration device technology, which is applied in the direction of instruments, surveying and navigation, and measuring devices, can solve the problems that the magnetometer is susceptible to interference, the calculation error of the north yaw angle, and the calibration operation cannot be performed.
Active Publication Date: 2021-03-02
西安因诺航空科技有限公司
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Problems solved by technology
However, when there are large currents or ferromagnetic equipment around the aircraft, the magnetometer is easily disturbed, resulting in errors in the calculation of the north yaw angle, so the magnetometer needs to be calibrated
[0003] The traditional calibration method is to drag the aircraft to rotate a circle on the ground for calibration. This method is difficult to implement when the aircraft is large, and the calibration operation cannot be performed when it encounters interference when flying in the air.
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[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. 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.
[0055] Such as figure 1As shown, a device for calibrating a magnetometer of the present invention includes a motor 1, a motor shaft 2 and a conductive slip ring 4. As a certain preferred embodiment of the present invention, the motor 1 selects a stepper motor or a servo motor (or other type motor), the magnetometer circuit board 3 is installed on the motor shaft 2 of the stepping mo...
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The invention discloses a device and method for calibrating a magnetometer. The device for calibrating a magnetometer comprises a motor, a magnetometer circuit board and a conductive slip ring. The magnetometer circuit board is installed on a motor shaft of the motor; and the magnetometer circuit board is connected with the conductive slip ring electrically. Besides, according to the method for calibrating a magnetometer, the calibration device is triggered, the motor starts to rotate, the magnetometer collects magnetic data of a surrounding magnetic field; a processor obtains the data collected by the magnetometer and operates a calibration algorithm to obtain a calibration parameter; and the magnetometer is calibrated based on the obtained calibration parameter. According to the invention, the magnetometer circuit board is mounted on the motor shaft of the motor, the magnetometer circuit board is electrically connected with the conductive slip ring, and the rotation of the motor drives the magnetometer circuit board to rotate, so that the magnetometer calibration can be completed without rotating the aircraft. Moreover, the magnetometer interference can be automatically recognized in an online manner and the calibration is carried out automatically; the magnetometer is calibrated in real time and the calibration result is calculated.
Description
technical field [0001] The invention belongs to the field of aviation magnetometers, in particular to a method for calibrating the magnetometers. Background technique [0002] Magnetometer, also known as electronic compass, is a north-finding device commonly used on aircraft, drones and other aircraft. However, when there are large currents or ferromagnetic equipment around the aircraft, the magnetometer is easily disturbed, resulting in errors in the calculation of the north yaw angle, so the magnetometer needs to be calibrated. [0003] The traditional calibration method is to drag the aircraft and rotate it on the ground for calibration. This method is difficult to implement when the aircraft is large, and the calibration operation cannot be performed when it encounters interference when flying in the air. Contents of the invention [0004] Aiming at the technical problems in the prior art, the present invention provides a method for calibrating the magnetometer, the p...
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IPC IPC(8): G01C17/38
Inventor 闫永驰
Owner 西安因诺航空科技有限公司