Current sensor using a resonance directional magnetometer
AssigneeCommissariat a l'Energie Atomique
InventorsMarc Beranger, Denis Duret
Life of this patent
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Abstract
A current sensor using a resonance directional magnetometer which includes a magnetic circuit having a gap and a device supplying a voltage representative of a magnetic field produced in the gap by a current when the current passes through the circuit. The value of the field is a function of the intensity of the current. The device is a resonance directional magnetometer having a sample with resonant spins placed in the gap and exposed to a magnetic field having a polarization parallel to the field produced in the gap or coinciding with this field and a measuring device for exciting the resonance and detecting the excited resonance and for supplying a voltage representative of the amount of excited resonance.
Claims16
A current sensor comprising:
- a magnetic circuit having a magnetic loop interrupted by a gap, said magnetic loop surrounding a current to be measured;
- polarization means having a magnetic coil surrounding the magnetic loop, said polarization means being supplied by a polarization direct current for producing said polarization magnetic field;
- and
- a measuring device for supplying a voltage representative of a magnetic field Hlex produced in said gap by said current to be measured, said magnetic field Hlex having a value which is a function of the intensity of said current to be measured, wherein said measuring device is a resonance directional magnetometer including
- a sample placed in said gap which is made from a material having resonant spins and which is exposed to a polarization magnetic field generated by said polarization means parallel to said magnetic field Hlex produced in said gap, and
- measuring means comprising first magnetic means positioned in the vicinity of the sample for exciting a spin resonance of said sample and for detecting the excited spin resonance, and wherein said measuring means has a function for providing, an an output, said voltage representative of said magnetic field Hlex produced in said gap.
Dependencies are inferred from the claim text.