Patent ID: 7583080
Filing Date: 2009-09-01
Classification: B62D,G01D

Abstract:
1. A rotation angle detection device, comprising: a multi-rotatable first rotor holding a first target connected to an input axis and having an outer circumferential surface to which magnetic poles of alternate polarities are magnetized at an identical interval; a first detector for detecting a rotation angle of the first rotor, which is disposed facing the magnetic pole of the first target; a second rotor coupled to the input axis and having a gear; a third rotor coupled to the gear of the second rotor and having a gear provided with a second target in a center portion; a second detector for detecting a rotation angle of the third rotor; a fourth rotor coupled to the gear of the third rotor and having a gear provided with a third target in a center portion; and a third detector for detecting a rotation angle of the fourth rotor.