Title :
Characterization of aircraft joints using ultrasonic guided waves and physically based feature extraction
Author :
Hansch, Matthias K T ; Rajana, Krishna M. ; Rose, Joseph L.
fDate :
Oct. 31 1994-Nov. 3 1994
Abstract :
The guided wave technique is an emerging inspection procedure for the inspection of adhesively bonded lap splice joints and tear straps in aging aircraft. Due to inspection of joint locations with area scanning techniques, the evaluation of a joint region with a line scanning makes the guided wave technique a potential candidate for fast joint inspection and probably for further data evaluation for characterization of the defected imperfections. An approach to characterize or classify the inspection region is done by feature selection in order to acquire physically based information. Results are presented from lab specimens and from measurements on a Boeing 737-222 specimen manufactured in 1968
Keywords :
aircraft testing; feature extraction; inspection; multilayer perceptrons; surface acoustic wave waveguides; ultrasonic materials testing; Boeing 737-222; adhesively bonded lap splice joints; aging aircraft; aircraft joint inspection; data evaluation; defected imperfections; feature selection; guided Lamb waves; line scanning; neural network classifier; phase velocity dispersion curves; physically based feature extraction; tear straps; ultrasonic guided waves; Acoustic testing; Aircraft testing; Feature extraction; Inspection; Multilayer perceptrons; Neural network applications; Nondestructive testing; Surface acoustic wave waveguides;
Conference_Titel :
Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE
Conference_Location :
Cannes, France
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1994.401799
