Brillouin Frequency Shift Sensing Technology Used in Railway Strain and Temperature Measurement
This study and verification are based on the Brillouin frequency shift (BFS), which is related to the strain and temperature changes of a single-mode fiber, because such a shifted frequency can be quantitatively measured and converted to strain and temperature differences. We explain the installatio...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-07-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/15/7101 |
| _version_ | 1797525785912803328 |
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| author | Wen-Kuei Hsu Yu-Lin Lee Tsan-Teng Kuan |
| author_facet | Wen-Kuei Hsu Yu-Lin Lee Tsan-Teng Kuan |
| author_sort | Wen-Kuei Hsu |
| collection | DOAJ |
| description | This study and verification are based on the Brillouin frequency shift (BFS), which is related to the strain and temperature changes of a single-mode fiber, because such a shifted frequency can be quantitatively measured and converted to strain and temperature differences. We explain the installation of a Brillouin distributed fiber sensing system (DFOS) on an actual operating railway to measure the temperature and strain of the rail. In addition, the measured data were calculated and analyzed, revealing the geometric irregularity of the tested rail and the location of the abnormality. We obtained a temperature difference of 12.1 °C between the temperature distribution of the measured rail and the atmospheric temperature, and there was a 1.5 h delay between the two. We also obtained rail irregularities ranging from −0.3 to +0.4 mm by calculating the slight strain difference of the rail in this test. |
| first_indexed | 2024-03-10T09:17:55Z |
| format | Article |
| id | doaj.art-7c9a3cc8f66b40a19d6f1f1e55f1e148 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T09:17:55Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-7c9a3cc8f66b40a19d6f1f1e55f1e1482023-11-22T05:24:23ZengMDPI AGApplied Sciences2076-34172021-07-011115710110.3390/app11157101Brillouin Frequency Shift Sensing Technology Used in Railway Strain and Temperature MeasurementWen-Kuei Hsu0Yu-Lin Lee1Tsan-Teng Kuan2Department of Civil and Disaster Prevention Engineering, National United University, No. 2 Lienda Rd., Miaoli 36003, TaiwanDepartment of Civil Engineering, Chung Hua University, No. 707, Sec.2, Wufu Rd., Hsinchu 30012, TaiwanDepartment of Civil Engineering, Chung Hua University, No. 707, Sec.2, Wufu Rd., Hsinchu 30012, TaiwanThis study and verification are based on the Brillouin frequency shift (BFS), which is related to the strain and temperature changes of a single-mode fiber, because such a shifted frequency can be quantitatively measured and converted to strain and temperature differences. We explain the installation of a Brillouin distributed fiber sensing system (DFOS) on an actual operating railway to measure the temperature and strain of the rail. In addition, the measured data were calculated and analyzed, revealing the geometric irregularity of the tested rail and the location of the abnormality. We obtained a temperature difference of 12.1 °C between the temperature distribution of the measured rail and the atmospheric temperature, and there was a 1.5 h delay between the two. We also obtained rail irregularities ranging from −0.3 to +0.4 mm by calculating the slight strain difference of the rail in this test.https://www.mdpi.com/2076-3417/11/15/7101Brillouin frequency shiftdistributed fiber optic sensingrail strainrail deformationrail irregularity |
| spellingShingle | Wen-Kuei Hsu Yu-Lin Lee Tsan-Teng Kuan Brillouin Frequency Shift Sensing Technology Used in Railway Strain and Temperature Measurement Applied Sciences Brillouin frequency shift distributed fiber optic sensing rail strain rail deformation rail irregularity |
| title | Brillouin Frequency Shift Sensing Technology Used in Railway Strain and Temperature Measurement |
| title_full | Brillouin Frequency Shift Sensing Technology Used in Railway Strain and Temperature Measurement |
| title_fullStr | Brillouin Frequency Shift Sensing Technology Used in Railway Strain and Temperature Measurement |
| title_full_unstemmed | Brillouin Frequency Shift Sensing Technology Used in Railway Strain and Temperature Measurement |
| title_short | Brillouin Frequency Shift Sensing Technology Used in Railway Strain and Temperature Measurement |
| title_sort | brillouin frequency shift sensing technology used in railway strain and temperature measurement |
| topic | Brillouin frequency shift distributed fiber optic sensing rail strain rail deformation rail irregularity |
| url | https://www.mdpi.com/2076-3417/11/15/7101 |
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