Patent ID: 7535219
Filing Date: 2009-05-19
Classification: B62D,G01B,G01D

Abstract:
1. A rotation angle detector comprising: a rotator; a first detecting body configured to rotate in association with the rotator; a first detector configured to detect rotation of the first detecting body; a second detecting body configured to rotate at a different speed from the first detecting body in association with the first detecting body; a second detector configured to detect rotation of the second detecting body; an auxiliary detecting body engaged with the rotator at a position symmetrical to the first detecting body with respect to a rotation axis of the rotator; an auxiliary detector configured to detect rotation of the auxiliary detecting body; and a controller configured to detect a rotation angle of the rotator based on detection signals from the first detector, from the second detector, and from the auxiliary detector, wherein the controller is configured to compare the detection signals from the auxiliary detector and from the first detector.