Method for Determining the Measurement Direction of Magnetic Field Sensors

Abstract

This paper presents a method for determining angular deviations of magnetic field measurement sensors using changes in the instantaneous value of the magnetic field sweeping the applied sensors. Helmholtz-like compensation coils were used to determine the angles and eliminate the constant component of the magnetic field inside a magnetically shielded room, ensuring the generated field's uniformity. The preliminary measurements and analysis made measuring the relative angles of sensors' deviations possible using an external magnetic field generated by three pairs of coils. The paper shows that the applied solution allows for determining the angles between the sensors with an accuracy of up to several degrees, which can be used to analyze magnetic fields in measurements where the angular deviation of the magnetic field sensors changes depending on the tested object.