Measuring and testing – Vibration – Sensing apparatus
Patent
1984-10-22
1986-03-04
Birmiel, Howard A.
Measuring and testing
Vibration
Sensing apparatus
73661, G01H 1100, G01M 122, G01M 1300
Patent
active
045733589
ABSTRACT:
A plurality of sensors are disposed equally about a blade row in a turbine with each sensor being operable to provide an output signal in response to a passing blade. A blade is selected for monitoring purposes by designating its degree location relative to a reference position .+-. some angular distance constituting a small window. As the selected blade passes a sensor, its output signal, properly conditioned to form a pulse, is gated during the time period corresponding to the window. The sequential pulses of the sensors form a pulse train which is modulated by any blade vibration. An FM detector is provided for demodulating the pulse train to derive vibration information.
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Birmiel Howard A.
Schron D.
Westinghouse Electric Corp.
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