Microwave system for monitoring turbine blade vibration

Details Microwave system for monitoring turbine blade vibration Microwave system for monitoring turbine blade vibration

1994-06-17

1996-01-02

Williams, Hezron E.

Measuring and testing

Vibration

Sensing apparatus

73630, G01N 2900, G01N 1700

Patent

active

054798264

ABSTRACT:
A method for monitoring turbine blade vibrations comprises the step of transmitting a continuous wave of microwave energy toward a rotating row of blades. Each passage of an individual blade tip through the path of the continuous wave produces a signal indicative of the time at which each passage occurs. The signal is then monitored and analyzed to detect blade vibrations. The signal can be based on a standing wave or a reflected wave.

REFERENCES:
patent: 4080823 (1978-03-01), Stargardter
patent: 4413519 (1983-11-01), Bannister
patent: 4507658 (1985-03-01), Keating
patent: 4887468 (1989-12-01), Kendree

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