Joint position detector with fiber optical microbend loop

Details Joint position detector with fiber optical microbend loop Joint position detector with fiber optical microbend loop

1990-11-14

1992-06-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25022721, 73800, H01J 4014

Patent

active

051265583

ABSTRACT:
An apparatus for precisely controlling the movement and position of objects. The apparatus includes at least one moveable arm and a system for optically measuring the movement of the arm. The optical measurement system includes an optical fiber loop capable of producing microbend-induced optical attenuation when the loop is physically deformed by the movement of the arm. The apparatus further includes a signal source, a signal detector, and signal processing system for determining the attenuation of the signal between the signal source and the signal detector.

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patent: 4418984 (1983-12-01), Wysocki et al.
patent: 4459477 (1984-07-01), Agawa et al.
patent: 4472628 (1984-09-01), Whitten
patent: 4818174 (1989-04-01), Arpiarian et al.
patent: 4979793 (1990-12-01), Bowen et al.
Johnson et al, "Macrobend fiber optic transducer for aerospace applications", SPIE vol. 989 Fiber Optic Systems for Mobile Platforms II, 1988, pp. 68-77.
Ohtsuka et al, "Fibre-coil deformation-sensor immune from temperature disturbances", International Journal of Optoelectronics, 1988, vol. 3, No. 5, pp. 371-380.

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