Calibration of tri-axial magnetometer in magnetic compass using vector observations

In this paper, we propose a novel calibration scheme for a tri-axial magnetometer used in a magnetic compass. We first demonstrate that the most commonly used calibration method for tri-axial magnetometer, which is based on ellipsoid fitting, is unable to determine the inter-triad misalignment in a multi-sensor system. Then we discuss an improved calibration scheme that utilizes the invariance of the dot product of two constant vectors to overcome the weakness of the ellipsoid fitting method. Simulation and experiment results show that the proposed scheme is more accurate and stable compared with the conventional method.

[1]  Suzanne Lesecq,et al.  Calibration methods for inertial and magnetic sensors , 2009 .

[2]  Xiao Zhang,et al.  A Novel Calibration Method of Magnetic Compass Based on Ellipsoid Fitting , 2011, IEEE Transactions on Instrumentation and Measurement.

[3]  Xiaojuan Zhang,et al.  Novel Calibration Algorithm for a Three-Axis Strapdown Magnetometer , 2014, Sensors.

[4]  M. Shuster,et al.  Complete linear attitude-independent magnetometer calibration , 2002 .

[5]  Carlos Silvestre,et al.  Geometric Approach to Strapdown Magnetometer Calibration in Sensor Frame , 2011, IEEE Transactions on Aerospace and Electronic Systems.

[6]  Wei Li,et al.  Magnetic Sensors for Navigation Applications: An Overview , 2013, Journal of navigation.

[7]  M. J. Caruso,et al.  Applications of magnetic sensors for low cost compass systems , 2000, IEEE 2000. Position Location and Navigation Symposium (Cat. No.00CH37062).

[8]  Martin Sipos,et al.  Analyses of Triaxial Accelerometer Calibration Algorithms , 2012, IEEE Sensors Journal.

[9]  Pavel Ripka,et al.  AMR navigation systems and methods of their calibration , 2005 .

[10]  Timo Pylvänäinen,et al.  Automatic and adaptive calibration of 3D field sensors , 2008 .

[11]  Javaan Chahl,et al.  Semiautomatic calibration and alignment of a low cost, 9 sensor inertial magnetic measurement sensor , 2011, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[12]  Xiang Li,et al.  A new calibration method for tri-axial field sensors in strap-down navigation systems , 2012 .