Measuring and testing – Vibration – By mechanical waves
Patent
1995-03-10
1997-01-07
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
73598, 73625, 73628, 73629, G01N 2906
Patent
active
055919120
ABSTRACT:
An apparatus and method for ultrasonic inspection of a conduit are provided. The method involves directing a first ultrasonic pulse at a particular area of the conduit at a first angle, receiving the reflected sound from the first ultrasonic pulse, substantially simultaneously or subsequently in very close time proximity directing a second ultrasonic pulse at said area of the conduit from a substantially different angle than said first angle, receiving the reflected sound from the second ultrasonic pulse, and comparing the received sounds to determine if there is a defect in that area of the conduit. The apparatus of the invention is suitable for carrying out the above-described method. The method and apparatus of the present invention provide the ability to distinguish between sounds reflected by defects in a conduit and sounds reflected by harmless deposits associated with the conduit.
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"Aerotech Transducers" (sales brochure), Krautkrammer Branson Ultransonic Transducer Catalog, p. 19.
Robert C. McMaster, "Nondestructive Testing Handbook", American Society for Nondestructive Testing Handbook, The Ronald Press Co., New York, 1959, vol. II, pp. 49.8-49.13.
Nance Roy A.
Spisak Michael J.
Ashraf Nashmiya
Caress Virginia B.
Gottlieb Paul A.
Moser William R.
The United States of America as represented by the United States
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