Sensor system, system and method for determining a position or a rotational angle
AssigneeInfineon Technologies AG
InventorSimone Fontanesi
Life of this patent
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Abstract
A sensor system includes a first group of sensor elements sensitive to a magnetic field in a predetermined direction, wherein the first group of sensor elements supplies a first signal indicative of the magnetic field in the predetermined direction. Further, the sensor system includes a second group of sensor elements sensitive to the magnetic field in the predetermined direction, wherein the second group of sensor elements supplies a second signal having a relative phase shift relative to the first signal. A combination of the first signal and the second signal indicates a rotational angle of an object.
Claims20
A sensor system, comprising:
- a first group of sensor elements supplying a first signal indicative of a magnetic field in a first predetermined direction;
- and
- a second group of sensor elements supplying a second signal having a phase shift relative to the first signal,
- wherein:
- the first group of sensor elements and the second group of sensor elements are arranged in a linear fashion,
- a first portion of the second group of sensor elements is arranged between a first portion and a second portion of the first group of sensor elements in a predetermined displacement direction, and
- a second portion of the second group of sensor elements is arranged outside of the first portion and the second portion of the first group of sensor elements in the predetermined displacement direction, and
- wherein each of the first group of sensor elements and the second group of sensor elements is sensitive to the magnetic field in a same second predetermined direction, and
- wherein a combination of the first signal and the second signal indicates a rotational angle of an object.
A system for determining a position or a rotational angle of an object, comprising:
- a first group of sensor elements supplying a first signal indicative of a magnetic field in a first predetermined direction;
- a second group of sensor elements supplying a second signal having a phase shift relative to the first signal,
- wherein:
- the first group of sensor elements and the second group of sensor elements are arranged in a predetermined displacement direction,
- a first portion of the first group of sensor elements and a second portion of the second group of sensor elements are displaced from each other in the predetermined displacement direction, and
- a second portion of the first group of sensor elements and a first portion of the second group of sensors are arranged directly next to each other,
- wherein each of the first group of sensor elements and the second group of sensor elements is sensitive to the magnetic field in a same second predetermined direction, and
- wherein a combination of the first signal and the second signal indicates the rotational angle of the object;
- and
- an encoder configured to provide a magnetic field that periodically alternates in the first predetermined direction.
A method for determining a position or a rotational angle, comprising:
- supplying a first signal indicative of a magnetic field in a first predetermined direction via a first group of sensor elements;
- and
- supplying a second signal having a phase shift relative to the first signal via a second group of sensor elements,
- wherein:
- the first group of sensor elements and the second group of sensor elements are arranged in a linear fashion,
- a first portion of the second group of sensor elements is arranged between a first portion and a second portion of the first group of sensor elements in a predetermined displacement direction, and
- a second portion of the second group of sensor elements is arranged outside of the first portion and the second portion of the first group of sensor elements in the predetermined displacement direction,
- wherein each of the first group of sensor elements and the second group of sensor elements is sensitive to the magnetic field in a same second predetermined direction, and
- wherein a combination of the first signal and the second signal indicates the rotational angle of an object.
Dependencies are inferred from the claim text.