US 12,292,280 B2
Angle sensor
Yannick Vuillermet, Voglans (FR); Xavier Blanc, Annecy (FR); and Andreas P. Friedrich, Metz-Tessy (FR)
Assigned to Allegro MicroSystems, LLC, Manchester, NH (US)
Filed by Allegro MicroSystems, LLC, Manchester, NH (US)
Filed on Dec. 20, 2022, as Appl. No. 18/068,796.
Prior Publication US 2024/0200926 A1, Jun. 20, 2024
Int. Cl. G01B 7/30 (2006.01); G01R 33/00 (2006.01); G01R 33/02 (2006.01)
CPC G01B 7/30 (2013.01) [G01R 33/0005 (2013.01); G01R 33/02 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A system, comprising:
a first sensor including a sensing element SEA1 and a sensing element SEB1, the sensing elements SEA1 and SEB1 having respective axes of sensitivity that are substantially perpendicular to each other, the sensing element SEA1 being arranged to generate a signal SA1, the sensing element SEB1 being arranged to generate a signal SB1, the signals SA1 and SB1 being generated in response to a magnetic field that is associated with a rotating target;
a second sensor including a sensing element SEA2 and a sensing element SEB2, the sensing elements SEA2 and SEB2 having respective axes of sensitivity that are substantially perpendicular to each other, the sensing element SEA2 being arranged to generate a signal SA2, the sensing element SEB2 being arranged to generate a signal SB2, the signals SA2 and SB2 being generated in response to the magnetic field; and
a controller configured to obtain a position of the rotating target, the position being calculated based on a first difference between the signals SAI and SA2 and a second difference between the signals SB1 and SB2,
wherein the first sensor is aligned with a first axis that intersects an axis of rotation of the rotating target, and the second sensor is aligned with a second axis that intersects the axis of rotation of the rotating target, the second axis being substantially perpendicular to the first axis, and
wherein the respective axes of sensitivity of sensing elements SEA1 and SEA2 have substantially the same orientation relative to an axis of a spatial reference frame where the first sensor the second sensor are situated, and the respective axes of sensitivity of sensing elements SEB1 and SEB2 have substantially the same orientation relative to the axis.