METHOD FOR OPERATIONAL CALIBRATION OF TRIAXIAL ELECTRONIC COMPASS WITH AXIS DISPLACEMENT COMPENSATION Russian patent published in 2021 - IPC G01C17/38 G01C17/28 

FIELD: measuring equipment.

SUBSTANCE: invention relates to the field of measuring equipment and is used for calibration of a triaxial electronic compass. To calibrate a triaxial electronic compass, two coordinate systems are introduced, wherein one is associated with the Earth (E) and the other one with the steered object (S), the object is then rotated in three stages; at the first stage, the OZ axes of the coordinate systems S and E are aligned, and the steered object is rotated around the OZ axis, at the second stage the OZ axis of the coordinate system S is placed in the OXY plane of the coordinate system E, and the steered object is rotated around the OZ axis of the coordinate system S, at the third stage the OZ axes of the coordinate systems S and E are aligned, and the steered object is rotated around any of the axes lying in the OXY plane of the coordinate system E. Readings are collected from the triaxial electronic compass during rotation and grouped depending on the axis of rotation. Upon completing the collection of data, the parameters of the ellipsoid formed under the impact of the additive, multiplicative and rotational components of distortion of the spatial position of the steered object are determined, and the transition quaternion is also determined, followed by compensating the magnetic induction vector measured with the electronic compass.

EFFECT: increased accuracy of measuring the spatial orientation angles.

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