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Paper Abstract and Keywords
Presentation 2011-03-04 11:30
Circular ring diameter change measurement by Brillouin gain spectrum observation
Tomoaki Hattori, Hiroshi Naruse, Takanori Nishino (Mie Univ.) OFT2010-68 OPE2010-172
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents a method for measuring the change in diameter of
a circular ring to which an external force is applied
from its diametrical direction, by the observing
Brillouin gain spectrum (BGS) produced
in an optical fiber bonded to its surface.
The function that gives the BGS shape by
deformation from the diametrical force on the
circular ring is formulated based on
(i) the relationship between a non-uniform strain
distribution produced in the circular ring under
the diametrical force and the diameter change using
elastic analysis, (ii) the strain dependence of
the BGS frequency shift, and (iii) the BGS observation
position and section length.
The diameter change is obtained by minimizing
the residual error sum of squares between observed BGSs and
those calculated by the function.
Results from diameter change measurement experiments using
a circular ring with a diameter of ca. 2 m
confirmed that the observed BGS shape is in good agreement with that
calculated by the function.
The error for the diameter change measurement was less than 0.7 mm.
The rate of diameter change with applied force is assumed
to be low up to a diameter change of 1 \%, followed by a significant
increase above 1 \%, as previously reported.
Therefore, the measurement error in the range up to 1 \% diameter change
for a ca. 2m circular ring is 3.5 \%.
These results show the validity of the BGS shape analysis and
the effectiveness of this method.
Keyword (in Japanese) (See Japanese page) 
(in English) Optical fiber sensing / non-uniform strain distribution / Brillouin gain spectrum / circular ring / diameter change measurement / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 436, OFT2010-68, pp. 27-30, March 2011.
Paper # OFT2010-68 
Date of Issue 2011-02-25 (OFT, OPE) 
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 OFT2010-68 OPE2010-172

Conference Information
Committee OFT OPE  
Conference Date 2011-03-04 - 2011-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To OFT 
Conference Code 2011-03-OFT-OPE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Circular ring diameter change measurement by Brillouin gain spectrum observation 
Sub Title (in English)  
Keyword(1) Optical fiber sensing  
Keyword(2) non-uniform strain distribution  
Keyword(3) Brillouin gain spectrum  
Keyword(4) circular ring  
Keyword(5) diameter change measurement  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Tomoaki Hattori  
1st Author's Affiliation Mie University (Mie Univ.)
2nd Author's Name Hiroshi Naruse  
2nd Author's Affiliation Mie University (Mie Univ.)
3rd Author's Name Takanori Nishino  
3rd Author's Affiliation Mie University (Mie Univ.)
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Speaker Author-1 
Date Time 2011-03-04 11:30:00 
Presentation Time 25 minutes 
Registration for OFT 
Paper # OFT2010-68, OPE2010-172 
Volume (vol) vol.110 
Number (no) no.436(OFT), no.437(OPE) 
Page pp.27-30 
#Pages 4 
Date of Issue 2011-02-25 (OFT, OPE) 

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