Patent ID: 7158223
Filing Date: 2007-01-02
Classification: G01L,G02B

Abstract:
1. A torque measuring apparatus comprising: a rotor having a hollow body portion formed between a drive-side flange portion and a load-side flange portion; light emitting elements disposed on a periphery of the rotor, for emitting optical signals based on an output from a torque detection unit arranged on a hollow portion of the hollow body portion; a diffusion means for diffusing the optical signals; a light receiving fiber attached to a chassis disposed outside the rotor, for receiving the optical signals via the diffusion portion, the light receiving fiber having L-shaped curved portions at each end; a shielding plate arranged between each of the L-shaped curved portions and the light emitting elements; and optical high pass filters, each filter positioned between one end of the light receiving fiber and a respective optical signal conversion unit.