Patent ID: 7834620
Filing Date: 2010-11-16
Classification: G01R

Abstract:
1. Orthogonal fluxgate sensor for measuring an external magnetic field H ext , comprising a conductor for carrying an excitation current I exc , a saturable magnetic material adapted to saturate in the presence of a magnetic field generated by the excitation current, and at least one pick-up coil ( 10 ) adapted to detect variations in the magnetic field in the vicinity of the magnetic material, wherein the excitation conductor comprises a substantially linear elongated portion of conductive, non-magnetic material, forming an excitation rod ( 6 ), the magnetic material surrounding the excitation rod in the form of a cladding ( 8 ) and wherein the pick-up coil comprises at least two layers of planar spirals ( 12 a , 12 b ) stacked one of top of the other.