Monitoring optically powered actuators

Details Monitoring optically powered actuators Monitoring optically powered actuators

2007-01-02

2007-01-02

Sohn, Seung C. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C385S008000, C356S073100

Reexamination Certificate

active

10362863

ABSTRACT:
Operation of a power-by-light valve (15) by a source (11) along an optical fibre (13) is monitored by means of optical sensors (14) from which light passes back along fibre (13) to monitoring and processing units (16, 17). The sensors (14) include fibre bragg gratings (41, 43) for detecting differential pressure across diaphragms (42) and for detecting temperature. At the input end, an optical coupler (12) supplies sensor signals to units (16, 17) which can control source (11) via a signal (32).

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