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| Presentation | 2008-10-17 13:00 Measurement of Metal Thickness by Optical Fiber and Electromagnetic Acoustic Resonance. Takehiro Shirai, Yuichi Machijima (LAZOC)  OFT2008-38 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This system is measurement of metal plate thickness for pipe wall in plant, nuclear or thermal power station, and consists of EMAT (Electoromagnetic acoustic transducer) and optical fiber sensor. EMAT is composed of permanent magnet and an electric coil. EMAT generates Lorentz force and lets an ultrasonic wave propagate in a metal plate.Lorentz force create a mechanical force and generate an ultrasonic vibration. When a wavelength of ultrasonic became the integer double of the metal plate thickness, the resonance vibration occurs in metal plate. Optical fiber is attached on metal plate, and detects ultrasonic vibration. We confirmed that it was possible to measure precisely for various sizes thickness specimens and elbow plumbing shape sample having curvature side by using this technique. We produced the thermal resistance optical fiber sensor with heat-resistant resin, and confirmed that it was possible to measure thickness in the high temperature state of 200 degrees Celsius. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | metal plate / thickness / optical doppler / high temperature / EMAT / pipe wall / / | |
| Reference Info. | IEICE Tech. Rep., vol. 108, no. 245, OFT2008-38, pp. 19-22, Oct. 2008. | |
| Paper # | OFT2008-38 | |
| Date of Issue | 2008-10-10 (OFT) | |
| 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 | OFT2008-38 |
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| Conference Information | |
| Committee | OFT |
| Conference Date | 2008-10-17 - 2008-10-17 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | OFT |
| Conference Code | 2008-10-OFT |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Measurement of Metal Thickness by Optical Fiber and Electromagnetic Acoustic Resonance. |
| Sub Title (in English) | |
| Keyword(1) | metal plate |
| Keyword(2) | thickness |
| Keyword(3) | optical doppler |
| Keyword(4) | high temperature |
| Keyword(5) | EMAT |
| Keyword(6) | pipe wall |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Takehiro Shirai |
| 1st Author's Affiliation | LAZOC inc. (LAZOC) |
| 2nd Author's Name | Yuichi Machijima |
| 2nd Author's Affiliation | LAZOC inc. (LAZOC) |
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| Speaker | Author-1 |
| Date Time | 2008-10-17 13:00:00 |
| Presentation Time | 25 minutes |
| Registration for | OFT |
| Paper # | OFT2008-38 |
| Volume (vol) | vol.108 |
| Number (no) | no.245 |
| Page | pp.19-22 |
| #Pages | 4 |
| Date of Issue | 2008-10-10 (OFT) |
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