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US 2024/0200926 A1Published application
Angle sensor
AssigneeAllegro MicroSystems, LLC
InventorsYannick Vuillermet, Xavier Blanc, Andreas P. Friedrich
Life of this patent
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Abstract
A method comprising: generating signals SA1 and SB1 by using a first sensor that is positioned at a first position relative to a rotating target, the signals SA1 and SB1 being generated in response to a magnetic field that is associated with the rotating target; generating signals SA2 and SB2 by using a second sensor that is positioned at a second position relative to the rotating target; and calculating a position of the rotating target based on a ratio of a first difference between the signals SA1 and SA2 and a second difference between the signals SB1 and SB2.
Claims28
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 SA1 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 arranged at an angle relative to the first axis,
- wherein the first axis is substantially perpendicular to the second axis, respective axes of sensitivity of sensing elements SEA1 and SEA2 have substantially the same orientation, and the respective axes of sensitivity of sensing elements SEB1 and SEB2 have substantially the same orientation.
3 more elements
A method, comprising:
- generating signals SA1 and SB1 by using a first sensor that is positioned at a first position relative to a rotating target, the signals SA1 and SB1 being generated in response to a magnetic field that is associated with the rotating target, the signal SA1 being indicative of a magnitude, at the first position, of a component of the magnetic field in a first direction, and the signal SB1 being indicative of a magnitude, at the first position, of a component of the magnetic field in a second direction, the second direction being substantially perpendicular to the first direction;
- generating signals SA2 and SB2 by using a second sensor that is positioned at a second position relative to the rotating target, the signals SA2 and SB2 being generated in response to the magnetic field, the signal SA2 being indicative of a magnitude, at the second position, of the component of the magnetic field in the first direction, and the signal SB2 being indicative of a magnitude, at the second position, of the component of the magnetic field in the second direction;
- and
- calculating a position of the rotating target based on a ratio of a first difference between the signals SA1 and SA2 and a second difference between the signals SB1 and SB2.
1 more element
A system, comprising:
- means for generating signals SA1 and SB1 by using a first sensor that is positioned at a first position relative to a rotating target, the signals SA1 and SB1 being generated in response to a magnetic field that is associated with the rotating target, the signal SA1 being indicative of a magnitude, at the first position, of a component of the magnetic field in a first direction, and the signal SB1 being indicative of a magnitude, at the first position, of a component of the magnetic field in a second direction, the second direction being substantially perpendicular to the first direction;
- means for generating signals SA2 and SB2 by using a second sensor that is positioned at a second position relative to the rotating target, the signals SA2 and SB2 being generated in response to the magnetic field, the signal SA2 being indicative of a magnitude, at the second position, of the component of the magnetic field in the first direction, and the signal SB2 being indicative of a magnitude, at the second position, of the component of the magnetic field in the second direction;
- and
- calculating a position of the rotating target based on a ratio of a first difference between the signals SA1 and SA2 and a second difference between the signals SB1 and SB2.
1 more element
Dependencies are inferred from the claim text.