Sensor
AssigneeInfineon Technologies AG
InventorUdo Ausserlechner
Life of this patent
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Abstract
The present invention is directed to a sensor with a body and a magnetic field sensor. The body includes a plurality of structures arranged in a first direction to effect a periodically varying magnetic field upon movement of the body in the first direction. The magnetic field sensor is configured to detect components of the magnetic field in a second direction and in a third direction, wherein the magnetic field sensor is arranged adjacent to the body such that the second direction is perpendicular to the first direction and such that the third direction is perpendicular to the first direction and to the second direction.
Claims35
A sensor, comprising:
- a body with a plurality of structures arranged in a first direction configured to effect a periodically varying magnetic field in a second direction and a third direction upon movement of the body in the first direction;
- a magnetic field sensor configured to detect components of the magnetic field in the second direction and in the third direction;
- wherein the magnetic field sensor is arranged adjacent to the body such that the second direction is perpendicular to the first direction and such that the third direction is perpendicular to the first direction and to the second direction;
- and
- wherein the plurality of structures of the body comprise magnetic poles arranged with alternating polarity.
A sensor, comprising:
- a wheel with a plurality of azimuthally distributed structures arranged in a first direction configured to effect a periodically varying magnetic field in a second direction and a third direction upon rotation of the wheel;
- a first magnetic field sensor and a second magnetic field sensor configured to detect components of the magnetic field in the second direction and the third direction;
- wherein the first magnetic field sensor and the second magnetic field sensor are arranged adjacent to the wheel such that the second direction corresponds to a direction of the axis of the wheel and the third direction corresponds to a radial direction of the wheel;
- and
- wherein the plurality of azimuthally distributed structures of the wheel comprise magnetic poles arranged with alternating polarity.
A method for measuring a movement of a body, wherein the body comprises a plurality of structures arranged in a first direction to effect a periodically varying magnetic field in a second direction and a third direction upon movement of the body in the first direction, wherein the plurality of structures of the body comprise magnetic poles arranged with alternating polarity, the method comprising:
- detecting components of the magnetic field in the second direction and in the third direction with a magnetic field sensor;
- wherein the magnetic field sensor is arranged adjacent to the wheel such that the second direction is perpendicular to the first direction and such that the third direction is perpendicular to the first direction and to the second direction.
A method for manufacturing a sensor, the method comprising the following steps:
- providing a body with a plurality of structures arranged in a first direction to effect a periodically varying magnetic field in a second direction and a third direction upon movement of the body in the first direction, wherein the plurality of structures of the body comprise magnetic poles arranged with alternating polarity;
- and
- providing a magnetic field sensor configured to detect components of the magnetic field in the second direction and in the third direction;
- wherein the magnetic field sensor is arranged adjacent to body such that the second direction is perpendicular to the first direction and such that the third direction is perpendicular to the first direction and to the second direction.
Dependencies are inferred from the claim text.