Fiber optical sensor system, preferably for measuring physical p

Details Fiber optical sensor system, preferably for measuring physical p Fiber optical sensor system, preferably for measuring physical p

1980-12-01

1982-08-24

Britton, Howard

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455605, 455608, H04B 900

Patent

active

043464785

ABSTRACT:
The system contains a fiber optical transmission line, a first light source for emitting a first light beam into a first end of the transmission line, and at least one first light sensitive element for receiving light from a second end of the transmission line. An energy storage device such as a capacitor is connected to the first light sensitive element for energizing various components. The system further contains a second light source for emitting a second light beam into the second end of the transmission line. This source is controlled in dependence upon information to be transmitted, preferably in dependence of a physical parameter. The system finally contains a second receiver element for receiving light from the first end of the transmission line. This element generates an electric output signal which is in accordance with the transmitted information. The system preferably has a large number of transducer units or measuring elements associated with various second ends of the transmission line for transmitting information of various nature and/or from various locations.

REFERENCES:
patent: 4071753 (1978-01-01), Fulenwider
patent: 4091734 (1978-05-01), Redmond
Unterberger et al., "Application of Optical Transmission in Today's and Future Communication Networks", Second European Conference on Optical Fibre Communication, Paris, Sep. 27-30, 1976, pp. 383-387.
K. A. James, W. H. Quick and V. H. Strahan, "Fiber Optics: The Way to True Digital Sensors?", Control Engineering, Feb. 1979, pp. 30-33.

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