Temperature measurement

Details Temperature measurement Temperature measurement

1986-10-07

1989-08-22

Church, Craig E.

Optics: measuring and testing

Optical pyrometers

Plural color responsive

356 44, G01J 560

Patent

active

048590657

ABSTRACT:
A method of measuring temperature comprises the steps of consecutively launching (1, 2) input pulses of light at two different wavelengths into a temperature sensing element in the form of an elongate optical fibre (3); passing Raman scattered light from said element and deriving from said input pulses to intensity detectors (7, 8); obtaining from the detectors (7, 8) output signals indicative of the intensity of the Raman scattered light; and processing said output signals to provide a temperature measurement. A known position (10) along the optical fibre (3) is maintained at a known temperature to provide a reference for deriving temperature measurements at other positions along the optical fibre.

REFERENCES:
patent: 3986775 (1976-10-01), Chang et al.
patent: 4011013 (1977-03-01), Barrett
patent: 4081215 (1978-03-01), Penny et al.
patent: 4176960 (1979-12-01), Eckbreth
patent: 4710033 (1987-12-01), Hirano et al.

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