Measuring and testing – Vibration – By mechanical waves
Patent
1988-04-06
1989-08-15
Chapman, John
Measuring and testing
Vibration
By mechanical waves
73600, 73618, 73639, G01N 2900
Patent
active
048563340
ABSTRACT:
The invention is a method for the on-line nondestructive determination of the internal bond strength of composite panel products. The method involves impinging an ultrasound pulse against the panel by a first transducer and receiving a transmitted pulse at a second transducer. The received signal strength, temperature and panel thickness are entered into an algorithm from which the internal bond may be calculated. Preferably the receiving transducer is located on the opposite side of the panel and displaced somewhat from the first transducer. The inclusion of temperature and panel thickness as independent variables greatly improves the accuracy over that available from uncorrected ultrasound testing.
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J. Krautkramer et al., Ultrasonic Testing of Materials (Springer-Verlag, New York, 1983), pp. 293-296.
AET "Acoustic Emission Technology Corporation", Catalog, Jan. 1984.
Beall Frank C.
Beetham Richard C.
Rodgers John M.
Shearer Dwayne M.
Chapman John
Weyerhaeuser Company
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