| Presentation | 2023-10-12 [Poster Presentation] Judgement accuracy improvement of analysis area conformity searched coarsely for nonuniform strain measurement Motoki nakagawa, Takaya Kurokawa, Shusuke Narieda, Hiroshi Naruse, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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) |
| Keyword(in English) | Brillouin gain spectrum / nonuniform strain measurement / analysis area / coarse search / judgment accuracy |
| Paper # | OFT2023-25 |
| Date of Issue | 2023-10-05 (OFT) |
| Conference Information | |
| Committee | OFT |
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| Conference Date | 2023/10/12(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Makoto Yamada(Osaka Metropolitan Univ.) |
| Vice Chair | |
| Secretary | (NTT) |
| Assistant | Yukihiro Goto(NTT) / Yoshitomo Kobayashi(Furukawa Electric) |
| Paper Information | |
| Registration To | Technical Committee on Optical Fiber Technology |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Poster Presentation] 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 |
| 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) |
| Date | 2023-10-12 |
| Paper # | OFT2023-25 |
| Volume (vol) | vol.123 |
| Number (no) | OFT-210 |
| Page | pp.pp.39-42(OFT), |
| #Pages | 4 |
| Date of Issue | 2023-10-05 (OFT) |