Measurement of magnetic fields

Details Measurement of magnetic fields Measurement of magnetic fields

G - Physics

01

R

G01R 33/022 (2006.01)

Patent

CA 2373688

A method and apparatus for detecting magnetic fields in which a string (1) carries an alternating current. The displacement of the string from its unperturbated position due to a magnetic gradient across the string is detected by pick-up coils (L1, L2). The signals from the pick-up coils are demodulated using a signal derived from the alternating current to produce an output.

L'invention concerne un procédé et un appareil permettant la détection de champs magnétiques grâce à un câble (1) porteur de courant alternatif. Le déplacement du câble en raison de la circulation d'un gradient magnétique est détecté par des bobines de saisie (L1, L2). Les signaux en provenance de ces bobines sont démodulés à l'aide d'un signal dérivé du courant alternatif afin d'obtenir un signal de sortie.

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