Signal sensing and measuring in fibre optic systems with light p

Details Signal sensing and measuring in fibre optic systems with light p Signal sensing and measuring in fibre optic systems with light p

1990-09-21

1992-08-11

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2502311, H01J 4014

Patent

active

051381524

ABSTRACT:
In a fibre optic sensor control system using an optical fibre (14) responsive to an applied external pressure P and through which a series of pulses are transmitted, a detector (20, 22) is responsive to the pulse-width of the received pulses rather than merely their amplitude. This results in less susceptibility to interference and also makes the system less sensitive to changes in the transfer characteristics of the electro-optical convertor (12) and/or of the opto-electrical convertor (20) and/or the maximum transmittance of the optical fibre.

REFERENCES:
patent: 4591709 (1986-05-01), Koechner et al.
patent: 4678903 (1987-07-01), Wlodarczyk et al.
patent: 4743113 (1988-05-01), Jubinski
patent: 4880970 (1989-11-01), Jones
patent: 4918305 (1990-04-01), Wlodarczyk et al.
patent: 4947037 (1990-08-01), Nash et al.

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