US 12,228,468 B2
Position sensor, designed in particular for detecting torsion in a steering column
Didier Frachon, Besançon (FR)
Assigned to MOVING MAGNET TECHNOLOGIES, Besançon (FR)
Appl. No. 17/433,188
Filed by Moving Magnet Technologies, Besançon (FR)
PCT Filed Feb. 25, 2020, PCT No. PCT/FR2020/050353
§ 371(c)(1), (2) Date Aug. 23, 2021,
PCT Pub. No. WO2020/174171, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. 1901907 (FR), filed on Feb. 25, 2019.
Prior Publication US 2022/0136918 A1, May 5, 2022
Int. Cl. G01L 5/22 (2006.01); B62D 15/02 (2006.01); G01B 7/30 (2006.01); G01D 5/14 (2006.01); G01L 3/10 (2006.01); G01R 33/06 (2006.01)
CPC G01L 5/221 (2013.01) [B62D 15/02 (2013.01); G01B 7/30 (2013.01); G01D 5/145 (2013.01); G01L 3/104 (2013.01); G01D 5/142 (2013.01); G01R 33/06 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A position sensor for detecting torsion in a steering column, comprising:
a first magnetized magnetic rotor structure comprising a plurality of magnets;
two flux-collecting components defining at least one air gap, the flux-collecting components collecting fluxes of a measured magnetic field and of an interference magnetic field, each flux-collecting component having at least one primary collecting zone extended by at least one extension having at least one secondary collecting zone, the secondary collecting zones ending with at least substantially planar axial extension portions forming a first magnetic pole and a second magnetic pole of the air gap, a transverse mid-plane of the air gap intersecting at least one of the extensions, the at least one primary collecting zone and the at least one secondary collecting zone of the two flux-collecting components being positioned respectively on either side of the transverse mid-plane such that the interference magnetic field collected by each of the two flux-collecting components is brought into the air gap in an opposing magnetic field direction from the magnetic field direction of the collecting zone, the at least one primary collecting zone of the first flux-collecting component having at least one collecting surface with a first mid-plane (PP1), the at least one primary collecting zone of the second flux-collecting component having at least one collecting surface with a second mid-plane (PP2), an at least one secondary collecting zone for creating the opposing interference magnetic field direction of the first flux-collecting component having at least one collecting surface for the first flux-collecting component having a third mid-plane (PS1), an at least one secondary collecting zone for creating the opposing interference magnetic field direction of the second flux-collecting component having at least one collecting surface for the second flux-collecting component having a fourth mid-plane (PS2), wherein the first mid-plane (PP1) is not perpendicular to the fourth mid-plane (PS2) or the second mid-plane (PP2) is not perpendicular to the third mid-plane (PS1); and
at least one magnetically sensitive element positioned in the at least one air gap.