Rotation angle detection apparatus
OwnerSatoshi Kawamura, Masahiro Iezawa +5inventors
InventorsSatoshi Kawamura, Masahiro Iezawa, Masaya Inoue, Yoshitaka Onishi, Fumitaka Takenaga, Sotsuo Miyoshi, Takeshi Mori
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Abstract
An arithmetic processing means detects a change in a rotation angle of one or more rotations from the direction of a change in the sign of one of sensor output signals and the sign of the other sensor output signal, and generates multiple rotation angle information from information about the detected change in the rotation angle of one or more rotations and rotation angle information about one rotation calculated from the sensor output signals.
Claims7
A rotation angle detection apparatus which determines a rotation angle by using a vector from two sine wave shaped sensor output signals which are out of phase with each other, wherein said rotation angle detection apparatus comprises:
- an arithmetic processing means for detecting a change in a rotation angle of one or more rotations from a direction of a change in a sign of one of said two sensor output signals and a sign of the other one of said two sensor output signals, and for generating multiple rotation angle information from information about said detected change in the rotation angle of one or more rotations and rotation angle information about one rotation calculated from said sensor output signals.
A rotation angle detection apparatus which determines a rotation angle by using a vector from two sine wave shaped sensor output signals which are out of phase with each other, wherein said rotation angle detection apparatus comprises:
- an arithmetic processing means for generating signals of two phases each having an arbitrary number of divisions per one rotation, the signals of two phases being out of phase with each other, from rotation angle information about one rotation which is calculated from said two sine wave shaped sensor output signals which are out of phase with each other, and for increasing or decreasing a number of times that said signals of two phases vary according to directions of changes in said signals and magnitudes of the signals.
Dependencies are inferred from the claim text.