Angle sensor
AssigneeAlps Electric Co., Ltd.
InventorIchiro TOKUNAGA
Life of this patent
Estimating the term…
Abstract
A magnet which is attached to a rotary body and which is rotatable together with the rotary body; an annular yoke which extends annularly to surround an outer peripheral surface around a rotary shaft of the magnet and in which a notch portion is formed in a part in the extending direction; and a hall element which is disposed in the notch portion and which detects the strength of a magnetic field in the radial direction of the magnet and detects the strength of a magnetic field in the rotation angle direction perpendicular to the magnetic field in the radial direction of the magnet are provided. The angle of rotation of the magnet is calculated on the basis of signals corresponding to the magnetic field strengths in the radial direction and rotation angle direction detected by the hall element.
Claims9
An angle sensor comprising:
- a magnet which is attached to a rotary body and which is rotatable together with the rotary body;
- an annular yoke which extends annularly to surround an outer peripheral surface around a rotary shaft of the magnet and in which a notch portion is formed in a part in the extending direction;
- a magnetic detection element which is disposed in the notch portion and which detects the strength of a magnetic field in the radial direction of the magnet and detects the strength of a magnetic field in the rotation angle direction perpendicular to the magnetic field in the radial direction of the magnet;
- and
- an operation unit that calculates the angle of rotation of the magnet on the basis of signals corresponding to the magnetic field strengths in the radial direction and rotation angle direction detected by the magnetic detection element.
An angle sensor comprising:
- a magnet which is attached to a rotary body and which is rotatable together with the rotary body;
- an annular yoke which extends annularly to surround an outer peripheral surface around a rotary shaft of the magnet and in which a plurality of notch portions is formed in the extending direction;
- a magnetic detection element which is disposed in one of the plurality of notch portions and which detects the strength of a magnetic field in the radial direction of the magnet and detects the strength of a magnetic field in the rotation angle direction perpendicular to the magnetic field in the radial direction of the magnet;
- and
- an operation unit that calculates the angle of rotation of the magnet on the basis of signals corresponding to the magnetic field strengths in the radial direction and rotation angle direction detected by the magnetic detection element.
Dependencies are inferred from the claim text.