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Paper Abstract and Keywords
Presentation 2016-11-07 16:50
Development of piezoelectric transducer system for the measurement of bed load
Masatoshi Hayashi, Takuya Kikkawa, Daisuke Koyama, Mami Matsukawa (Doshisha Univ.) US2016-59
Abstract (in Japanese) (See Japanese page) 
(in English) In the field of environmental measurements, robust and simple sensors with no electric power supply are required. For river environments, size distributions of sand and small stones in the river-bed are important factor to prevent river disasters. In this report, a passive piezoelectric sensor for measurement of the particle distribution in flow was investigated. The sensor consists of an aluminum circular plate (diameter: 50 mm; thickness: 2 mm) and an annular piezoelectric transducer (inner radius: 5 mm; outer radius: 10 mm; thickness: 2 mm). Alumina spheres with several diameters ( = 3, 5, and 8 mm) were employed as small particles. When the particles hit the surface of the sensor, the flexural vibration is excited on the circular plate and the electric power is generated through the piezoelectric effect. Two main frequency peaks at 16.3 and 66.7 kHz appeared in the output signal, and the ratio of these two spectrum depended on the particle size. Through the finite element analysis, it was found that these frequencies of 16.3 and 66.7 kHz correspond with the fundamental and third resonance vibration modes. When the particles hit the sensor surface sequentially, the particle sizes could be determined from the short time frequency conversion of the observed voltage waveform.
Keyword (in Japanese) (See Japanese page) 
(in English) Bed load / Determination of particle size / Piezoelectric sensor / Flexural vibration / Frequency spectrum / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 288, US2016-59, pp. 59-62, Nov. 2016.
Paper # US2016-59 
Date of Issue 2016-10-31 (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 US2016-59

Conference Information
Committee US  
Conference Date 2016-11-07 - 2016-11-07 
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 2016-11-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Development of piezoelectric transducer system for the measurement of bed load 
Sub Title (in English)  
Keyword(1) Bed load  
Keyword(2) Determination of particle size  
Keyword(3) Piezoelectric sensor  
Keyword(4) Flexural vibration  
Keyword(5) Frequency spectrum  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Masatoshi Hayashi  
1st Author's Affiliation Doshisha University (Doshisha Univ.)
2nd Author's Name Takuya Kikkawa  
2nd Author's Affiliation Doshisha University (Doshisha Univ.)
3rd Author's Name Daisuke Koyama  
3rd Author's Affiliation Doshisha University (Doshisha Univ.)
4th Author's Name Mami Matsukawa  
4th Author's Affiliation Doshisha University (Doshisha Univ.)
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Speaker Author-1 
Date Time 2016-11-07 16:50:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2016-59 
Volume (vol) vol.116 
Number (no) no.288 
Page pp.59-62 
#Pages 4 
Date of Issue 2016-10-31 (US) 

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