Boots – shoes – and leggings
Patent
1996-06-24
1998-03-31
Cosimano, Edward R.
Boots, shoes, and leggings
73644, 364506, G01N 2904, G01N 2912
Patent
active
057345880
ABSTRACT:
Guided ultrasonic waves are used for the detection of defective tubes in a heat exchanger or steam generator by using a transducer which generates a guided wave at predetermined parameters of phase velocity and frequency to operate at a point on a dispersion curve which minimizes leakage of ultrasonic energy to fluid surrounding the tube. Various techniques of generating ultrasonic waves of various phase velocities such as a comb type filter allow phase velocity points on a dispersion curve to be freely selected.
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Article entitle "Utilization Oblique Incidence in Acousto-Ultrasonics", by A. Pilarski, J. L. Rose, K. Balasubramaniam, J. Da-Le, Proceedings of the Acousto-Ultrasonics: Theory and Application, Blacksburg, VA, Jul. 12-15, 1987, pp. 1-10 and drawings.
Carr Frank T.
Ditri John J.
Jiao Dale
Rose Joseph L.
Spanner, Jr. Jack C.
Cosimano Edward R.
Electric Power Research Institute Inc.
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