Remote optical sensing device and method

Details Remote optical sensing device and method Remote optical sensing device and method

1987-06-24

1990-07-03

Pascal, Robert J.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455618, 332183, H04B 900

Patent

active

049394827

ABSTRACT:
A remote sensing system including a control module coupled to a remote device module via an optical fiber is disclosed. The device module includes circuitry for detecting changes in physical parameters and for transmitting data relating thereto back to the control module in serial form via the optical fiber. Power for the circuitry within the device module is obtained from a photodiode which receives light from the control module via the optical fiber and no power multiplication is utilized except which the remote module is transmitting serial data back to the control module. Data signals are also provided from which monitoring of the integrity of the device module and connections thereto can be obtained.

REFERENCES:
patent: 4307469 (1981-12-01), Casper et al.
Goff, Bidirectional Communication Using a Single Gallium Arsenide Diode, Proceedings of the 27th Midwest Symposium on Circuits and Systems (1984), pp. 800-802.
Fasching et al., NTIS Publication DE85 017761.

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