Measuring and testing – Vibration – By mechanical waves
Patent
1988-08-05
1990-05-01
Myracle, Jerry W.
Measuring and testing
Vibration
By mechanical waves
73168, G01B 1700
Patent
active
049208020
ABSTRACT:
The disclosed method includes the steps of positioning an ultrasonic transmitter (50, 52) on the exterior body portion (54) of the valve (14), oriented so that the transmitted ultrasonic wave intercepts the path (46) of the closure member (30) at least at one location, and positioning an ultrasonic receiver on the body portion oriented to detect reflected ultrasonic waves when the closure member passes through such location. The valve body (20) is filled with water and the closure member is caused to move along the path. The transmitter and receiver are operated to generate an output signal trace (64) commensurate with the magnitude of the ultrasonic wave reflected from the closure member at the targeted locations along the path.
REFERENCES:
patent: 3455532 (1969-07-01), Barker
patent: 4543649 (1985-09-01), Head et al.
patent: 4678621 (1987-07-01), Callaghan et al.
Hijek Paul J.
McMullin Craig W.
Negahban Shahab S.
Rosenberger John E.
Combustion Engineering Inc.
Myracle Jerry W.
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