Tri-axis modified Helmholtz coil system for magnetometer characterization and calibration
Allen, Kristen Marie
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In this thesis, the design of a tri-axis magnetometer characterization and calibration system is realized through the use of three pairs of modified Helmholtz Coils. These three pairs of coils, with each pair separated by their shared diameter and placed along the three orthogonal directions, will, when supplied with a current, produce a known magnetic field in the surrounding environment that will serve to excite a magnetometer, a sensor that serves to measure magnetic fields, placed at the center of the system. Commercially available magnetometers, the HMC5843 and HMC5883L, will be employed to test the functionality of the coil system in determining the inherent error of these magnetometers and accounting for the existence of hard and soft iron errors in the surrounding environment and to correct for these errors whenever possible. The modeling, design, and operation of this coil test system will be presented and detailed.