Rotational angle detecting device
AssigneeDenso Corporation
InventorsSusumu Kuroyanagi, Yukihiro Kato
Life of this patent
Estimating the term…
Abstract
A rotational angle detecting device includes a sensor portion disposed on a shaft. The sensor portion includes longitudinal hall elements disposed perpendicular to each other for outputting a hall voltage proportional to a magnetic flux induced by a magnet disposed on the shaft. The device also includes an engagement mechanism for maintaining a positional relationship with the magnet in which a center portion of the sensor is aligned with a center portion of the magnet.
Claims10
A rotational angle detecting device comprising:
- a sensor portion having a Hall element for detecting the rotational angle of the rotating shaft based upon the value of a Hall voltage output from the Hall element in accordance with the intensity of a magnetic field emitted from a magnet rotated in connection with rotation of the rotating shaft, wherein the sensor portion comprises:
- longitudinal Hall elements disposed in 90-degree arrangement relationship to detect a magnetic field component horizontal to a substrate surface of a semiconductor substrate;
- and
- an engaging mechanism for making the center of the rotation of the magnet mechanically coincident with a center of the sensor portion at which lines passing through the center points of the longitudinal Hall elements and perpendicular to the arrangement directions of the longitudinal Hall elements intersect to each other while the magnetic field emitted from the magnet is applied to the substrate surface of the semiconductor substrate in parallel is provided between the sensor portion and the magnet.
A rotational angle detecting device comprising:
- a sensor portion disposed on a shaft, wherein the sensor portion includes longitudinal hall elements disposed perpendicular to each other for outputting a hall voltage proportional to a magnetic flux induced by a magnet disposed on the shaft;
- and
- an engagement mechanism for maintaining a positional relationship with the magnet in which a center portion of the sensor is aligned with a center portion of the magnet.
The rotational angle detecting device, wherein the sensor portion is comprised of an IC chip having the longitudinal Hall elements formed therein, wherein the IC chip is resin-molded by a mold resin, wherein the engagement mechanism comprises a semi-spherical recess portion provided at a center of the resin mold.
Dependencies are inferred from the claim text.