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Paper Abstract and Keywords
Presentation 2023-10-12 13:00
[Poster Presentation] Judgement accuracy improvement of analysis area conformity searched coarsely for nonuniform strain measurement
Motoki nakagawa, Takaya Kurokawa, Shusuke Narieda, Hiroshi Naruse (Mie University) OFT2023-25
Abstract (in Japanese) (See Japanese page) 
(in English) Optical fiber sensors that measure strain based on the assumption that the shape of the Brillouin gain spectrum (BGS) is represented by a Lorentz function have increasing measurement error for nonuniform strain that deforms the BGS shape. We have proposed a method to measure nonuniform strain with high accuracy using a set of BGS values (BGS pattern) within an analysis area with several measurement positions and observation frequencies. In this report, we describe a method to improve the judgment accuracy of the analytical area that is coarsely searched for use in this high-precision measurement. In the coarse search, a neural network (NN) is trained using many pairs of BGS patterns calculated from the nonuniform strain models and their conformities, and the BGS patterns in the observed BGS are input to the NN to judge the conformity of the area. Through simulations, the characteristics of misjudged strains were first examined. Then, by using the BGS patterns that took them into account in training the NN, the accuracy of conformity judgment of the analysis area was improved.
Keyword (in Japanese) (See Japanese page) 
(in English) Brillouin gain spectrum / nonuniform strain measurement / analysis area / coarse search / judgment accuracy / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 210, OFT2023-25, pp. 39-42, Oct. 2023.
Paper # OFT2023-25 
Date of Issue 2023-10-05 (OFT) 
ISSN 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 OFT2023-25

Conference Information
Committee OFT  
Conference Date 2023-10-12 - 2023-10-13 
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 2023-10-OFT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Judgement accuracy improvement of analysis area conformity searched coarsely for nonuniform strain measurement 
Sub Title (in English)  
Keyword(1) Brillouin gain spectrum  
Keyword(2) nonuniform strain measurement  
Keyword(3) analysis area  
Keyword(4) coarse search  
Keyword(5) judgment accuracy  
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1st Author's Name Motoki nakagawa  
1st Author's Affiliation Mie University (Mie University)
2nd Author's Name Takaya Kurokawa  
2nd Author's Affiliation Mie University (Mie University)
3rd Author's Name Shusuke Narieda  
3rd Author's Affiliation Mie University (Mie University)
4th Author's Name Hiroshi Naruse  
4th Author's Affiliation Mie University (Mie University)
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Speaker Author-1 
Date Time 2023-10-12 13:00:00 
Presentation Time 100 minutes 
Registration for OFT 
Paper # OFT2023-25 
Volume (vol) vol.123 
Number (no) no.210 
Page pp.39-42 
#Pages 4 
Date of Issue 2023-10-05 (OFT) 

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