Measurement of a cyclic motion of a ferromagnetic part
AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsAlexis LE GOFF, Roland Blanpain
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Abstract
A system for measuring a cyclic motion of a ferromagnetic part in an environment made noisy by at least one electric source with an A.C. component, comprising: at least one first magnetometer sensitive to the moving part; a sensor of an image of the current in said electric source; means for calculating an estimate of the noise linked to the electric source on a signal measured by the first magnetometer; and means for subtracting this estimate from the measured signal.
Claims9
A system for measuring a cyclic motion of a ferromagnetic part in an environment made noisy by at least one electric source with an A.C. component, comprising:
- at least one first magnetometer sensitive to the moving part;
- a sensor of an image of the current in said electric source;
- means for calculating an estimate of the noise due to the electric source on a signal measured by the first magnetometer;
- and
- means for subtracting said estimate from the measured signal.
A method for estimating a cyclic motion of at least one ferromagnetic part in an environment made noisy by at least one electric source with an A.C. component, comprising the steps of:
- measuring an image of the magnetic field influenced at least by said part;
- measuring an image of the current in said electric source;
- applying a correlation filtering to said image of the magnetic field to eliminate the influence of said electric source.
Dependencies are inferred from the claim text.