Fiber optic temperature-measuring apparatus

Details Fiber optic temperature-measuring apparatus Fiber optic temperature-measuring apparatus

1981-06-12

1983-10-11

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250231R, 374161, G01J 510, G01K 1120, G08C 1506

Patent

active

044094760

ABSTRACT:
The invention relates to a fiber optic temperature-measuring apparatus, based on the photo-luminescence of a solid material which is subjected to the temperature to be measured. The apparatus is characterized in that several sensors made of such a temperature-sensitive luminescent material are located in various places, each one being connected to a light-emitting diode via at least one optical fiber. Luminescent light emitted from each sensor is arranged to be supplied, via at least one separate optical fiber, possibly partially via the above-mentioned fiber and a fiber branch, to a receiver unit, common to all the sensors, the excitation light signal from each light-emitting diode being time-division multiplexed.

REFERENCES:
patent: 4223216 (1980-09-01), Quick et al.
patent: 4249076 (1981-02-01), Bergstrom et al.

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