Magnetic amplification device comprising a magnetic sensor with longitudinal sensitivity
AssigneesThales, Centre National De La Recherche Scientifique
InventorsChristophe Coillot, Paul Leroy, Gerard Chanteur, Alain Roux, Frederic Nguyen Van Dau
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Abstract
The invention relates to a magnetic amplification device comprising a magnetic sensor with longitudinal sensitivity, having a first piece of magnetic material and a second piece of magnetic material, each of the pieces having a longitudinal slot at its center, the pieces being separated by a distance called the gap, and the magnetic sensor being inserted into the two slots. The device of the invention typically makes it possible to measure low magnetic fields smaller than the Earth's field using a magnetic sensor of the AMR type.
Claims20
A magnetic amplification device comprising a magnetic sensor (Cm) of the anisotropic magnetoresistance (AMR), giant magnetoresistance (GMR), tunnel magnetoresistance (TMR) or giant magnetoresistance (GMI) type, the sensitivity to the magnetic field of the device being in the transverse direction, wherein:
- dimensions of the magnetic sensor are of the order of a few millimeters along the directions Dx and Dy and a few hundred microns in thickness;
- and
- comprising a first piece of magnetic material and a second piece of magnetic material, each of the pieces having a longitudinal slot, said pieces being separated by a distance called the gap, and the magnetic sensor being inserted into the two slots.
Dependencies are inferred from the claim text.