Measuring and testing – Vibration – By mechanical waves
Patent
1991-02-11
1992-05-26
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
73168, 73119A, 137554, 367 99, 376245, 376252, E03B 707, F16K 3700
Patent
active
051156725
ABSTRACT:
A system and method for determining the condition of one or more parameters of a valve, e.g., particularly a check valve in a fluid carrying pipe, by monitoring fluid turbulence downstream of the valve. An ultrasonic transmitter-receiver transducer pair provides a signal modulated by the fluid turbulence, which signal is demodulated and processed to obtain a signature or other signal indicative of the valve condition. The processes signature signal may additionally be compared with a measure of flow rate determined just upstream from the valve. By operating the ultrasonic system at high frequency and using appropriate detecting circuitry, low frequency interference from mechanical shocks and vibrations is avoided, yielding a reliable detection of the flow turbulence caused by the valve.
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McShane James L.
Ulerich Nancy H.
Finley Rose
Westinghouse Electric Corp.
Williams Hezron E.
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