Patent ID: 6456069
Filing Date: 2002-09-24
Classification: G01R

Abstract:
A fluxgate device for sensing the transverse component of the magnetic field intensity H at a surface area of a ferromagnetic entity, said device comprising:a magnetic core which generally describes a three-dimensional â€œEâ€  shape, said magnetic core including four portions, said four portions being a base portion and three leg portions each projecting from said base portion, said three leg portions being a first end leg portion, a second end leg portion and a middle leg portion, said middle leg portion being approximately equidistantly interposed between said first end leg portion and said second end leg portion, said first end leg portion, said second end leg portion and said middle leg portion each having a leg end surface for being situated adjacent said surface area of said ferromagnetic entity when said device is positioned with respect to said ferromagnetic entity; a drive winding which is wound over said middle leg portion; two sense windings, said two sense windings being a first sense winding and a second sense winding, said first sense winding being wound over said base portion between said first end leg portion and said middle leg portion, said second sense winding being wound over said base portion between said second end leg portion and said middle leg portion; and three calibration windings, said three calibration windings being a first calibraton winding, a second calibration winding and a third calibration winding, said first calibration winding being wound over said first end leg portion, said second calibration winding being wound over said middle leg portion, said third calibration winding being wound over said second end leg portion.