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| Presentation | 2018-02-19 13:25 Study on non-contact acoustic inspection method using airborne sound wave -- Defect detection and visualization by statistical evaluation of a healthy part of concrete -- Kazuko Sugimoto, Tsuneyoshi Sugimoto (Toin univ. of Yokohama), Noriyuki Utagawa, Chitose Kuroda (SatoKogyo)  US2017-113 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | A non-contact acoustic inspection method was investigated to measure from 5-33 m away and detect internal defects (up to 10 cm in depth) of concrete structures using a long range acoustic device and a laser Doppler vibrometer. An algorithm has proposed to detect internal defects of concrete by combining two acoustic features, vibration energy ratio and spectral entropy obtained by our measurement. However, in an actual concrete structure, it is difficult to distinguish a boundary between a healthy part and a defective part due to influences such as shape of internal defect, aged deterioration and surface condition of concrete. Therefore, we propose a method to statistically evaluate the distribution of healthy part of concrete and extract a healthy part and identify a defective part. In this study, we investigated a case that vibration energy due to the defect is not so different as to the vibration energy of a healthy part of concrete. Using healthy part extraction algorithm for concrete, a healthy part of concrete was identified and evaluated statistically. Applying this algorithm to a circular peeling defect, a defective part was separated from a healthy part and defect was visualized well. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Non-contact acoustic inspection method / Defect detection algorithm / Vibration energy ratio / Spectral entropy / Tone burst wave / Statistical evaluation of healthy part of concrete / / | |
| Reference Info. | IEICE Tech. Rep., vol. 117, no. 441, US2017-113, pp. 7-12, Feb. 2018. | |
| Paper # | US2017-113 | |
| Date of Issue | 2018-02-12 (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 | US2017-113 |
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| Conference Information | |
| Committee | US |
| Conference Date | 2018-02-19 - 2018-02-19 |
| 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 | 2018-02-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Study on non-contact acoustic inspection method using airborne sound wave |
| Sub Title (in English) | Defect detection and visualization by statistical evaluation of a healthy part of concrete |
| Keyword(1) | Non-contact acoustic inspection method |
| Keyword(2) | Defect detection algorithm |
| Keyword(3) | Vibration energy ratio |
| Keyword(4) | Spectral entropy |
| Keyword(5) | Tone burst wave |
| Keyword(6) | Statistical evaluation of healthy part of concrete |
| 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 | 2018-02-19 13:25:00 |
| Presentation Time | 25 minutes |
| Registration for | US |
| Paper # | US2017-113 |
| Volume (vol) | vol.117 |
| Number (no) | no.441 |
| Page | pp.7-12 |
| #Pages | 6 |
| Date of Issue | 2018-02-12 (US) |
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