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| Presentation | 2020-02-28 12:45 Defect detection using resonance frequency identification by spatial spectral entropy for noncontact acoustic inspection -- Experimental result and analysis of a concrete slab of viaduct from a distance of 30m -- Kazuko Sugimoto, Tsuneyoshi Sugimoto (Toin Univ. of Yokohama), Noriyuki Utagawa, Chitose Kuroda (SatoKogyo)  US2019-99 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In noncontact acoustic inspection method, internal defects of composite materials, especially concrete was detected and visualized for shallow layers (up to a depth of about 10 cm) from a long distance up to about 33m in a non-contact and non-destructive manner. The measurement surface was excited by aerial plane sound waves in the audible range by the LRAD (Long Range Acoustic Device), and the vibration velocity distribution on the two-dimensional lattice points was measured using a scanning laser Doppler vibrometer. We propose Spatial Spectral Entropy (SSE). According to SSE analysis, it is possible to automatically detect the resonance frequencies of internal defects on the measurement surface, and at the same time, detect the resonance frequencies derived from the galvano mirror system of a high-sensitivity scanning laser Doppler vibrometer. Therefore, internal defect can be detected and visualized. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Noncontact acoustic inspection / Spatial Spectral Entropy / SSE / Resonance frequency / Internal defect / Laser Doppler vibrometer / / | |
| Reference Info. | IEICE Tech. Rep., vol. 119, no. 430, US2019-99, pp. 1-5, Feb. 2020. | |
| Paper # | US2019-99 | |
| Date of Issue | 2020-02-21 (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 | US2019-99 |
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| Conference Information | |
| Committee | US |
| Conference Date | 2020-02-28 - 2020-02-28 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | US |
| Conference Code | 2020-02-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Defect detection using resonance frequency identification by spatial spectral entropy for noncontact acoustic inspection |
| Sub Title (in English) | Experimental result and analysis of a concrete slab of viaduct from a distance of 30m |
| Keyword(1) | Noncontact acoustic inspection |
| Keyword(2) | Spatial Spectral Entropy |
| Keyword(3) | SSE |
| Keyword(4) | Resonance frequency |
| Keyword(5) | Internal defect |
| Keyword(6) | Laser Doppler vibrometer |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Kazuko Sugimoto |
| 1st Author's Affiliation | Toin University of Yokohama (Toin Univ. of Yokohama) |
| 2nd Author's Name | Tsuneyoshi Sugimoto |
| 2nd Author's Affiliation | Toin University of Yokohama (Toin Univ. of Yokohama) |
| 3rd Author's Name | Noriyuki Utagawa |
| 3rd Author's Affiliation | SatoKogyo Co.,Ltd. (SatoKogyo) |
| 4th Author's Name | Chitose Kuroda |
| 4th Author's Affiliation | SatoKogyo Co.,Ltd. (SatoKogyo) |
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| Speaker | Author-1 |
| Date Time | 2020-02-28 12:45:00 |
| Presentation Time | 25 minutes |
| Registration for | US |
| Paper # | US2019-99 |
| Volume (vol) | vol.119 |
| Number (no) | no.430 |
| Page | pp.1-5 |
| #Pages | 5 |
| Date of Issue | 2020-02-21 (US) |
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