Optical Frequency-Domain Reflectometry Based Distributed Temperature Sensing Using Rayleigh Backscattering Enhanced Fiber
An innovative optical frequency-domain reflectometry (OFDR)-based distributed temperature sensing method is proposed that utilizes a Rayleigh backscattering enhanced fiber (RBEF) as the sensing medium. The RBEF features randomly high backscattering points; the analysis of the fiber position shift of...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/12/5748 |
| _version_ | 1797592660974764032 |
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| author | Ziyi Lu Ting Feng Fang Li Xiaotian Steve Yao |
| author_facet | Ziyi Lu Ting Feng Fang Li Xiaotian Steve Yao |
| author_sort | Ziyi Lu |
| collection | DOAJ |
| description | An innovative optical frequency-domain reflectometry (OFDR)-based distributed temperature sensing method is proposed that utilizes a Rayleigh backscattering enhanced fiber (RBEF) as the sensing medium. The RBEF features randomly high backscattering points; the analysis of the fiber position shift of these points before and after the temperature change along the fiber is achieved using the sliding cross-correlation method. The fiber position and temperature variation can be accurately demodulated by calibrating the mathematical relationship between the high backscattering point position along the RBEF and the temperature variation. Experimental results reveal a linear relationship between temperature variation and the total position displacement of high backscattering points. The temperature sensing sensitivity coefficient is 7.814 μm/(m·°C), with an average relative error temperature measurement of −1.12% and positioning error as low as 0.02 m for the temperature-influenced fiber segment. In the proposed demodulation method, the spatial resolution of temperature sensing is determined by the distribution of high backscattering points. The temperature sensing resolution depends on the spatial resolution of the OFDR system and the length of the temperature-influenced fiber. With an OFDR system spatial resolution of 12.5 μm, the temperature sensing resolution reaches 0.418 °C per meter of RBEF under test. |
| first_indexed | 2024-03-11T01:56:18Z |
| format | Article |
| id | doaj.art-b4b64a0630e74365ae96aa4122070af7 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T01:56:18Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-b4b64a0630e74365ae96aa4122070af72023-11-18T12:35:32ZengMDPI AGSensors1424-82202023-06-012312574810.3390/s23125748Optical Frequency-Domain Reflectometry Based Distributed Temperature Sensing Using Rayleigh Backscattering Enhanced FiberZiyi Lu0Ting Feng1Fang Li2Xiaotian Steve Yao3Photonics Information Innovation Center, College of Physics Science & Technology, Hebei University, Baoding 071002, ChinaPhotonics Information Innovation Center, College of Physics Science & Technology, Hebei University, Baoding 071002, ChinaPhotonics Information Innovation Center, College of Physics Science & Technology, Hebei University, Baoding 071002, ChinaPhotonics Information Innovation Center, College of Physics Science & Technology, Hebei University, Baoding 071002, ChinaAn innovative optical frequency-domain reflectometry (OFDR)-based distributed temperature sensing method is proposed that utilizes a Rayleigh backscattering enhanced fiber (RBEF) as the sensing medium. The RBEF features randomly high backscattering points; the analysis of the fiber position shift of these points before and after the temperature change along the fiber is achieved using the sliding cross-correlation method. The fiber position and temperature variation can be accurately demodulated by calibrating the mathematical relationship between the high backscattering point position along the RBEF and the temperature variation. Experimental results reveal a linear relationship between temperature variation and the total position displacement of high backscattering points. The temperature sensing sensitivity coefficient is 7.814 μm/(m·°C), with an average relative error temperature measurement of −1.12% and positioning error as low as 0.02 m for the temperature-influenced fiber segment. In the proposed demodulation method, the spatial resolution of temperature sensing is determined by the distribution of high backscattering points. The temperature sensing resolution depends on the spatial resolution of the OFDR system and the length of the temperature-influenced fiber. With an OFDR system spatial resolution of 12.5 μm, the temperature sensing resolution reaches 0.418 °C per meter of RBEF under test.https://www.mdpi.com/1424-8220/23/12/5748distributed optical fiber sensingRayleigh backscattering enhanced fiberoptical frequency-domain reflectometrytemperature measurement |
| spellingShingle | Ziyi Lu Ting Feng Fang Li Xiaotian Steve Yao Optical Frequency-Domain Reflectometry Based Distributed Temperature Sensing Using Rayleigh Backscattering Enhanced Fiber Sensors distributed optical fiber sensing Rayleigh backscattering enhanced fiber optical frequency-domain reflectometry temperature measurement |
| title | Optical Frequency-Domain Reflectometry Based Distributed Temperature Sensing Using Rayleigh Backscattering Enhanced Fiber |
| title_full | Optical Frequency-Domain Reflectometry Based Distributed Temperature Sensing Using Rayleigh Backscattering Enhanced Fiber |
| title_fullStr | Optical Frequency-Domain Reflectometry Based Distributed Temperature Sensing Using Rayleigh Backscattering Enhanced Fiber |
| title_full_unstemmed | Optical Frequency-Domain Reflectometry Based Distributed Temperature Sensing Using Rayleigh Backscattering Enhanced Fiber |
| title_short | Optical Frequency-Domain Reflectometry Based Distributed Temperature Sensing Using Rayleigh Backscattering Enhanced Fiber |
| title_sort | optical frequency domain reflectometry based distributed temperature sensing using rayleigh backscattering enhanced fiber |
| topic | distributed optical fiber sensing Rayleigh backscattering enhanced fiber optical frequency-domain reflectometry temperature measurement |
| url | https://www.mdpi.com/1424-8220/23/12/5748 |
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