Rotation angle detecting device
AssigneeDenso Corporation
InventorsTatsuya Kitanaka, Takashi Kawashima, Kouichirou Matsumoto
Life of this patent
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Abstract
A rotation angle detecting device includes a magnetic field forming member, magneto-sensing IC circuit including first and second sensing sections in a magnetic field to have a first preset angle between them, and a selecting circuit. One of the first and second sensing section includes plural magneto-sensing elements whose sensing surfaces face in directions different from one another by a second preset angle. When the magnetic field forming member rotates relative to the magneto-sensing means, the magneto-sensing elements respectively provide the output signals. The selecting circuit selects a pair of the output signals of the magneto-sensing elements that is closest to a preset phase difference angle.
Claims9
A rotation angle detecting device for detecting a rotation angle of a rotating object comprising:
- a magnetic field forming member for providing a generally parallel magnetic field;
- magneto-sensing means including a first sensing section and a second sensing section disposed in the magnetic field to have a first preset angle between them, at least one of the first and second sensing section including a plurality of magneto-sensing elements whose sensing surfaces face in directions different from one another by a second preset angle;
- and
- selecting means, connected to the magneto-sensing elements of the first and second sensing sections, for selecting a pair of output signals of the magneto-sensing elements that is closest to a preset phase difference angle,
- wherein the magnetic field forming member rotates relative to the magneto-sensing means when the rotating object rotates so that the magneto-sensing elements respectively provide the output signals.
Dependencies are inferred from the claim text.