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Paper Abstract and Keywords
Presentation 2013-02-19 16:40
Ultrasonic Imaging of Internal Voids in Concrete by the FSAP Technique with an Array Transducer in Low Frequency Range
Kazuyuki Nakahata, Gun Kawamura (Ehime Univ.), Sohichi Hirose (Tokyo Inst. of Tech.) US2012-119
Abstract (in Japanese) (See Japanese page) 
(in English) This study presents a flaw reconstruction method in concrete material with the full-waveform sampling and processing (FSAP) technique. The FSAP is an ultrasonic phased array technique which makes use of scattered waves, measured by every two-element combination as a pulser and a receiver, to synthesize high amplitude beams for any focal point. Here, we investigate the property of wave field in concrete using the elastodynamic finite integration technique (EFIT). Since it is shown that wave dispersion is not significant in a frequency range of this measurement, a constant velocity is used in flaw reconstructions by the FSAP. An internal flaw located on the depth of approximately 200mm can be reconstructed using an array transducer with 200 kHz center frequency.
Keyword (in Japanese) (See Japanese page) 
(in English) Ultrasonic Testing / Array Transducer / Full-waveform sampling and processing(FSAP) Technique / Flaw Reconstruction / Concrete Material / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 437, US2012-119, pp. 49-52, Feb. 2013.
Paper # US2012-119 
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 US2012-119

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) Ultrasonic Imaging of Internal Voids in Concrete by the FSAP Technique with an Array Transducer in Low Frequency Range 
Sub Title (in English)  
Keyword(1) Ultrasonic Testing  
Keyword(2) Array Transducer  
Keyword(3) Full-waveform sampling and processing(FSAP) Technique  
Keyword(4) Flaw Reconstruction  
Keyword(5) Concrete Material  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Kazuyuki Nakahata  
1st Author's Affiliation Ehime University (Ehime Univ.)
2nd Author's Name Gun Kawamura  
2nd Author's Affiliation Ehime University (Ehime Univ.)
3rd Author's Name Sohichi Hirose  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Inst. of Tech.)
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Speaker Author-1 
Date Time 2013-02-19 16:40:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2012-119 
Volume (vol) vol.112 
Number (no) no.437 
Page pp.49-52 
#Pages 4 
Date of Issue 2013-02-12 (US) 

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