Method of stabilising a magnetometer signal and stabilised magnetometers
AssigneeCommissariat a l'Energie Atomique
InventorsBernard Guilhamat, Jean-Michel Leger
Life of this patent
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Abstract
The magnetometer includes a magnetic core (1) with at least one branch (2, 3), at least one exciting coil (4, 5) and one take-up coil (10) sensitive to ambient fields thanks to the excitation field (B). An additional magnetic field, to advantage perpendicular to the previous ones, is added to eliminate very low frequency noises, without it being measured.
Claims7
Method of stabilising a magnetometer including a magnetic core (1), coils including at least one active coil (4, 5) and one take-up coil (10), the active coil being arranged in such a way as to create a magnetic excitation field (B) in the core, which sensitises the take-up coil, means (13) of passing an alternating current at an excitation frequency in the active coil and means (14) of measuring a voltage induced at a frequency double the excitation frequency in the take-up coil, characterised in that it is consists in subjecting the take-up coil to an additional alternating magnetic field, to which the measurement means (14) are insensitive.
Dependencies are inferred from the claim text.