A new compact 2D planar fluxgate sensor with amorphous metal core
A new compact 2D planar fluxgate sensor using a ferromagnetic amorphous metal core is described. The fluxgate sensor consists of two orthogonal planar coils and an amorphous magnetic ring core mounted on a PCB substrate. Each planar coil is used alternatively as excitation or as pick-up coil. An electronic interface drives alternatively the two coils and performs a feedback on each sensing coil in order to compensate for the measured magnetic field. The sensing element has a magnetic detectivity of 40nT for an excitation frequency of 10kHz and a 160mApeak driving current.
Record created on 2011-02-10, modified on 2016-08-09