Measuring and testing – Vibration – By mechanical waves
Patent
1976-10-12
1978-06-06
Queisser, Richard C.
Measuring and testing
Vibration
By mechanical waves
73643, G01N 2904
Patent
active
040928683
ABSTRACT:
A method and device which are suitable for the in-place inspection of pipelines are provided. A completely self-contained, mobile inspection station is placed inside a pipeline. The station runs through the pipe and transmits Lamb waves within the pipe wall, receives reflected and transmitted portions of the waves, and records the amplitude and phase of the received waves. The recorded information is analyzed to determine the location and nature of discontinuities in the pipe.
REFERENCES:
patent: 2995925 (1961-08-01), Worlton
patent: 3120120 (1964-02-01), Worlton et al.
patent: 3810384 (1974-05-01), Evans
patent: 3850028 (1974-11-01), Thompson et al.
DINovi; "Lambwaves: Their Use in Nondestructive Testing;" Argonne National Lab and AEC Report; pp. 1-20, Mar. 1963.
Lockett; "Lamb and Torsional Waves and Their Use in Flaw Detection in Tubes," Ultrasonics, Jan. 1973, pp. 31-37.
Alers George A.
Tennison Marion A.
Thompson Robert B.
Humphries L. Lee
Kreitman Stephen A.
Malin Craig O.
Queisser Richard C.
Rockwell International Corporation
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