Angle detection device for rotational body

Details Angle detection device for rotational body Angle detection device for rotational body

2006-04-11

2006-04-11

Sohn, Seung C. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C358S484000

Reexamination Certificate

active

07026605

ABSTRACT:
In an angle detection device for a rotational body, an external peripheral surface of an arc-shaped fluorescent fiber is scanned by a scanning beam from a scanning mirror fixed to the rotational shaft of a swing motor. Fluorescence is generated at a position in the fluorescent fiber scanned by the scanning beam, the fluorescence is propagated to both ends thereof, and the received luminous energy corresponding to the scanning position is detected by photodiodes. A signal processing circuit compares output signals of the photodiodes to obtain the scanning position of the scanning light, and the corresponding rotation angle of the swing motor is found.

REFERENCES:
patent: 5015846 (1991-05-01), Okuyama et al.
patent: 5306903 (1994-04-01), Yamamuro et al.
patent: 5790275 (1998-08-01), Iizuka
patent: 2001-339910 (2001-12-01), None

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