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| Presentation | 2013-02-19 15:15 Imaging of plate thinning shapes using guided waves Sohichi Hirose, Bin Wang (Tokyo Inst. of Tech.)  US2012-116 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Several tomographic technologies using guided waves have been developed to detect the location and size of defects of a plate. Most of them are, however, based on empirical or statistical methods, and only few methods are partially relied on the wave theory. In this paper, an innovative method is presented for reconstructing a flaw shape of 3-D plate thinning from reflection coefficients of ultrasonic guided waves. The new inverse method is fully based on the scattering theory of guided waves in a 3-D plate. Starting with the rigorous integral expression of scattered waves by a plate thinning flaw, with the far field expression of Green’s functions and Born approximations introduced, we obtain a Fourier transform pair between the shape function of thinning flaw and reflection coefficients in frequency domain. A numerical example using reflection coefficients of the fundamental SH wave mode is illustrated to show the validity and effectiveness of the inverse approach. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | guided wave / plate thinning / shape reconstruction / inverse problem / Born approximation / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 112, no. 437, US2012-116, pp. 33-35, Feb. 2013. | |
| Paper # | US2012-116 | |
| Date of Issue | 2013-02-12 (US) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | US2012-116 |
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| Conference Information | |
| Committee | US |
| Conference Date | 2013-02-19 - 2013-02-19 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Acoustic Imaging, General, etc |
| Paper Information | |
| Registration To | US |
| Conference Code | 2013-02-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Imaging of plate thinning shapes using guided waves |
| Sub Title (in English) | |
| Keyword(1) | guided wave |
| Keyword(2) | plate thinning |
| Keyword(3) | shape reconstruction |
| Keyword(4) | inverse problem |
| Keyword(5) | Born approximation |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Sohichi Hirose |
| 1st Author's Affiliation | Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
| 2nd Author's Name | Bin Wang |
| 2nd Author's Affiliation | Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
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| Speaker | Author-1 |
| Date Time | 2013-02-19 15:15:00 |
| Presentation Time | 25 minutes |
| Registration for | US |
| Paper # | US2012-116 |
| Volume (vol) | vol.112 |
| Number (no) | no.437 |
| Page | pp.33-35 |
| #Pages | 3 |
| Date of Issue | 2013-02-12 (US) |
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