G - Physics – 01 – J
Patent
G - Physics
01
J
73/52
G01J 5/08 (2006.01) G01J 5/10 (2006.01) G01J 5/60 (2006.01)
Patent
CA 1307942
ABSTRACT OF THE DISCLOSURE Optical pyrometers such as for a gas-turbine engine have a fibre-optic cable that supplies radiation from the engine blades to a remotely mounted detector. The output from the detector is amplified and processed to provide an indication of temperature. In the present invention the detector includes a photodiode and an amplifier that are mounted in a cylindrical metal casing that forms one end of the fibre-optic cable. The detector casing has a connector that is mateable with a connector on the casing of a separate processing unit so that the detector can be electrically connected with the processing unit without the need for cables between the two casings. The detector connector has a flange that provides good thermal contact with the connector on the processing unit so as to help equalise the temperatures of the two casings. The processing unit casing is cooled by means of a thermal transfer unit supplied with liquid fuel. The processing unit has an electrical circuit that processes the output of the detector circuit and inputs from other sources to provide an output to an engine control unit.
553318
Fetherstonhaugh & Co.
Smiths Industries Public Limited Company
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