PASSIVE SENSOR FOR MONITORING VIBRATION OF A COMBUSTION TURBINE BLADE

摘要

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 ratiation, 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.