Method and device compensating for gyromagnetic effects on a nuclear gyromagnetic resonance magnetometer

Abstract

Abstract The rotation of the magnetometer 100 with respect to the magnetic field @ to be measured is split into elementary rotations about three axes; for each axis around which a rotation of the magnetometer 100 induces a rotation of its liquids 2, 2', the corresponding speed of rotation P, Q, R of the magnetometer 100 is measured. Using an auxiliary magnetometer 7, the components Hx, Hy, Hz of the magnetic field @ are measured; a signal SE forming an estimate of the error is subtracted from the signal SH measuring the strength H of the magnetic field @ arising from the magnetometer 100, SE being equal to the sum of the products P.hx + Q.hy + R.hz of each measured speed of rotation and the projection on the corresponding axis of a unit vector having the direction of the said magnetic field. The invention finds application particularly in the measurement of variations in the earth's magnetic field.

Inventors

• 👤 Jean-Louis Lescourret
• 👤 Claude Sonrel

Bibliographic Details