The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 18, 2005
Filed:
Oct. 17, 2001
Jean-michel Leger, Villard Bonnot, FR;
Olivier Gravrand, Grenoble, FR;
François Bertrand, Tronche, FR;
Jean-Michel Leger, Villard Bonnot, FR;
Olivier Gravrand, Grenoble, FR;
François Bertrand, Tronche, FR;
Commissariat a l'Energie Atomique, Paris, FR;
Abstract
A vectorial magnetometer (), measures the components of a magnetic field in three directions (Oxyz) using a scalar magnetometer (). The field is periodically modulated in each of the directions by generators (Gx, Gy, Gz) which have a specific frequency for each direction and that power coils (Ex, Ey, Ez). Synchronous demodulation of the of the output signal of the scalar magnetometer () for each of the three frequencies permits the relative continuous component of each axis to be found. The vectorial magnetometer () is characterized in that it has means (Dx D'x, Dy D′y, Dz D′z) that can carry out a double demodulation for phase and quadrature for each of the frequencies and processing means () that use the continuous component modules for phase and quadrature to calculate a transfer function of the scalar magnetometer at the frequency in question, and to apply this function to the correction of the components.