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Titolo:
Ultrasonic Lamb wave diffraction tomography
Autore:
Malyarenko, EV; Hinders, MK;
Indirizzi:
Coll William & Mary, Dept Appl Sci, Williamsburg, VA 23187 USA Coll William & Mary Williamsburg VA USA 23187 Williamsburg, VA 23187 USA
Titolo Testata:
ULTRASONICS
fascicolo: 4, volume: 39, anno: 2001,
pagine: 269 - 281
SICI:
0041-624X(200106)39:4<269:ULWDT>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
IMAGE-RECONSTRUCTION; ART ALGORITHM; RESOLUTION; SCATTERING;
Keywords:
tomography; Lamb waves; cross-hole; SIRT; ray tracing;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Hinders, MK Coll William & Mary, Dept Appl Sci, Williamsburg, VA 23187 USAColl William & Mary Williamsburg VA USA 23187 g, VA 23187 USA
Citazione:
E.V. Malyarenko e M.K. Hinders, "Ultrasonic Lamb wave diffraction tomography", ULTRASONICS, 39(4), 2001, pp. 269-281

Abstract

Ultrasonic guided waves, Lamb waves, allow large sections of aircraft structures to be rapidly inspected. Unlike conventional ultrasonic C-scan imaging that requires access to the whole inspected area, tomographic algorithmswork with data collected over the perimeter. Because the velocity of Lamb waves depends on thickness the travel times of the fundamental modes can beconverted into a thickness map of inspected region. Lamb waves cannot penetrate through holes and other strongly scattering defects and the assumption of straight wave paths, essential for many tomographic algorithms, fails. Diffraction tomography is a way to incorporate scattering effects into tomographic algorithms in order to improve image quality and resolution. This work describes the iterative reconstruction procedure developed for Lamb wave tomography and allowing for ray bending correction for imaging of moderately scattering objects. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 08:14:03