| Presentation | 2017-10-13 Relationship between BGS observation conditions and measurement error in ring circumferential strain measurement based on BGS Kento Nishimura, Hiroshi Naruse, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The method has been proposed, for measuring the ring circumferential strain by fitting the Brillouin gain spectrum (BGS) model to the BGS observed in an optical fiber installed on the ring circumference. This model consists of parameters related to the BGS characteristics (the basic BGS shape given by the Lorentzian function and the strain dependence of Brillouin frequency shift), the BGS observation conditions (the BGS observation angle and section corresponding to the strain measurement position on the ring circumference, and the BGS observation frequency), the ring size, and the circumferential strain described with Fourier series. Through simulations, we investigated the relationship between BGS observation conditions and strain measurement errors about the circumferential strain produced on the ring to which a pair of loads is applied in the diameter direction. It was clarified that the strain measurement error decreases as an interval of the observation angle becomes narrower, it can be regarded to be constant when the observation section is wide while it increases with decrease in the section, and it is inversely proportional to the square root of the total number of the observation frequency. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | optical fiber sensing / Brillouin gain spectrum / strain / ring / observation condition / measurement error / simulation |
| Paper # | OFT2017-42 |
| Date of Issue | 2017-10-05 (OFT) |
| Conference Information | |
| Committee | OFT |
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| Conference Date | 2017/10/12(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kochi Prefectural Culture Hall |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Masayuki Shigematsu(Sumitomo Electric Industries) |
| Vice Chair | |
| Secretary | (Furukawa Electric) |
| Assistant | Ikutaro Ogushi(NTT) / Katsuki Suematsu(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) | Relationship between BGS observation conditions and measurement error in ring circumferential strain measurement based on BGS |
| Sub Title (in English) | |
| Keyword(1) | optical fiber sensing |
| Keyword(2) | Brillouin gain spectrum |
| Keyword(3) | strain |
| Keyword(4) | ring |
| Keyword(5) | observation condition |
| Keyword(6) | measurement error |
| Keyword(7) | simulation |
| 1st Author's Name | Kento Nishimura |
| 1st Author's Affiliation | Mie University(Mie Univ.) |
| 2nd Author's Name | Hiroshi Naruse |
| 2nd Author's Affiliation | Mie University(Mie Univ.) |
| Date | 2017-10-13 |
| Paper # | OFT2017-42 |
| Volume (vol) | vol.117 |
| Number (no) | OFT-237 |
| Page | pp.pp.19-22(OFT), |
| #Pages | 4 |
| Date of Issue | 2017-10-05 (OFT) |