Passive sensor for monitoring vibration of a combustion...

G - Physics – 01 – H

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G01H 9/00 (2006.01) F01D 5/26 (2006.01) F01D 25/04 (2006.01) G01H 1/00 (2006.01) G01L 23/22 (2006.01)

Patent

CA 2235288

A passive blade vibration monitor sensor (50) for determining an arrival time of a blade (52) of a combustion turbine during operation, the sensor (50) includes an optical lens (42) which receives infrared radiation generated by the blade (52) of the turbine and generates a sensor signal from the received infrared radiation, the sensor signal indicating an arrival time of the blade (52) of the combustion turbine. Target material (54) having an emissivity lower than the emissivity of the blade (52) may be placed on the blade (52) to enhance sensor sensitivity especially shrouded blade environments.

Un détecteur passif (50), destiné au contrôle des vibrations d'aubes, détermine un temps d'arrivée d'une aube (52) d'une turbine à combustion lors de son fonctionnement. Le détecteur (50) comprend une lentille optique (42), laquelle reçoit un rayonnement infrarouge généré par l'aube (52) de la turbine, et génère un signal de détecteur provenant du rayonnement infrarouge reçu, le signal du détecteur indiquant un temps d'arrivée de l'aube (52) de la turbine à combustion. Un matériau cible (54) présentant une émittance inférieure à l'émittance de l'aube (52) peut être placé sur ladite aube (52) afin d'améliorer la sensibilité du détecteur, notamment pour des environnements d'aubes renforcées.

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