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Europäisches Patentamt

SENSORSYSTEM MIT MEHRPOLIGEM MAGNETEN | SYSTÈME DE CAPTEUR COMPRENANT UN AIMANT MULTIPOLAIRE | SENSOR SYSTEM COMPRISING A MULTIPOLE MAGNET

Patentnummer:EP3543657B1
IPC Hauptklasse:G01D000514
Anmelder:
Erfinder:
Anmeldung:05.12.18
Offenlegung:24.03.18
Patenterteilung:07.10.20

Abstract / Hauptanspruch
A sensor system (1) comprising a magnetic field generator (2) and a sensor device (3) arranged at a distance (dz) from said magnetic field generator (2) and adapted for measuring or determining at least one magnetic field component and/or at least one magnetic field gradient component. The magnetic field generator (2) comprises a multi-pole magnet (12) having a number N of pole pairs that are axially magnetized to generate an N-pole magnetic field that is substantially rotationally symmetric around an axis (5). The magnet comprises a plurality of grooves (14) and/or elongate protrusions that are arranged in a rotationally symmetric pattern around the axis (5) to provide a substantially constant magnetic field gradient in a central region around said axis (5).



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