Measurement Improvement of Distributed Optical Fiber Sensor via Lorenz Local Single Peak Fitting Algorithm
Brillouin frequency shift (BFS) of distributed optical fiber sensor is extracted from the Brillouin gain spectrum (BGS), which is often characterized by Lorenz type. However, in the case of complex stress and optical fiber self damage, the BGS will deviate from Lorenz type and be asymmetric, which l...
| Main Authors: | , , , , , |
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| Format: | Article |
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MDPI AG
2021-06-01
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| Series: | Symmetry |
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| Online Access: | https://www.mdpi.com/2073-8994/13/7/1166 |
| _version_ | 1797528483722690560 |
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| author | Bin Liu Jianping He Shihai Zhang Yinping Zhang Jianan Yu Xiaoxue Wang |
| author_facet | Bin Liu Jianping He Shihai Zhang Yinping Zhang Jianan Yu Xiaoxue Wang |
| author_sort | Bin Liu |
| collection | DOAJ |
| description | Brillouin frequency shift (BFS) of distributed optical fiber sensor is extracted from the Brillouin gain spectrum (BGS), which is often characterized by Lorenz type. However, in the case of complex stress and optical fiber self damage, the BGS will deviate from Lorenz type and be asymmetric, which leads to the extraction error of BFS. In order to enhance the extraction accuracy of BFS, the Lorenz local single peak fitting algorithm was developed to fit the Brillouin gain spectrum curve, which can make the BSG symmetrical with respect to the Brillouin center frequency shift. One temperature test of a fiber-reinforced polymer (FRP) packaged sensor whose BSG curve is asymmetric was conducted to verify the idea. The results show that the local region curve of BSG processed by the developed algorithm has good symmetry, and the temperature measurement accuracy obtained by the developed algorithm is higher than that directly measured by demodulation equipment. Comparison with the reference temperature, the relative measurement error measured by the developed algorithm and BOTDA are within 4% and 8%, respectively. |
| first_indexed | 2024-03-10T09:58:57Z |
| format | Article |
| id | doaj.art-abf6bf9041224a26ad1060a50c6cee4d |
| institution | Directory Open Access Journal |
| issn | 2073-8994 |
| language | English |
| last_indexed | 2024-03-10T09:58:57Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Symmetry |
| spelling | doaj.art-abf6bf9041224a26ad1060a50c6cee4d2023-11-22T02:07:01ZengMDPI AGSymmetry2073-89942021-06-01137116610.3390/sym13071166Measurement Improvement of Distributed Optical Fiber Sensor via Lorenz Local Single Peak Fitting AlgorithmBin Liu0Jianping He1Shihai Zhang2Yinping Zhang3Jianan Yu4Xiaoxue Wang5School of Mathematics and Physics, Nanyang Institute of Technology, Nanyang 473001, ChinaSchool of Civil Engineering, Dalian University of Technology, Dalian 116024, ChinaSchool of Mathematics and Physics, Nanyang Institute of Technology, Nanyang 473001, ChinaSchool of Civil Engineering, Dalian University of Technology, Dalian 116024, ChinaSchool of Civil Engineering, Dalian University of Technology, Dalian 116024, ChinaDalian Bo Ruixin Technology Limited, Dalian 116024, ChinaBrillouin frequency shift (BFS) of distributed optical fiber sensor is extracted from the Brillouin gain spectrum (BGS), which is often characterized by Lorenz type. However, in the case of complex stress and optical fiber self damage, the BGS will deviate from Lorenz type and be asymmetric, which leads to the extraction error of BFS. In order to enhance the extraction accuracy of BFS, the Lorenz local single peak fitting algorithm was developed to fit the Brillouin gain spectrum curve, which can make the BSG symmetrical with respect to the Brillouin center frequency shift. One temperature test of a fiber-reinforced polymer (FRP) packaged sensor whose BSG curve is asymmetric was conducted to verify the idea. The results show that the local region curve of BSG processed by the developed algorithm has good symmetry, and the temperature measurement accuracy obtained by the developed algorithm is higher than that directly measured by demodulation equipment. Comparison with the reference temperature, the relative measurement error measured by the developed algorithm and BOTDA are within 4% and 8%, respectively.https://www.mdpi.com/2073-8994/13/7/1166optical fiber sensorBrillouin gain spectrumBrillouin frequency shiftLorenz local single peak fitting algorithmsignal symmetry |
| spellingShingle | Bin Liu Jianping He Shihai Zhang Yinping Zhang Jianan Yu Xiaoxue Wang Measurement Improvement of Distributed Optical Fiber Sensor via Lorenz Local Single Peak Fitting Algorithm Symmetry optical fiber sensor Brillouin gain spectrum Brillouin frequency shift Lorenz local single peak fitting algorithm signal symmetry |
| title | Measurement Improvement of Distributed Optical Fiber Sensor via Lorenz Local Single Peak Fitting Algorithm |
| title_full | Measurement Improvement of Distributed Optical Fiber Sensor via Lorenz Local Single Peak Fitting Algorithm |
| title_fullStr | Measurement Improvement of Distributed Optical Fiber Sensor via Lorenz Local Single Peak Fitting Algorithm |
| title_full_unstemmed | Measurement Improvement of Distributed Optical Fiber Sensor via Lorenz Local Single Peak Fitting Algorithm |
| title_short | Measurement Improvement of Distributed Optical Fiber Sensor via Lorenz Local Single Peak Fitting Algorithm |
| title_sort | measurement improvement of distributed optical fiber sensor via lorenz local single peak fitting algorithm |
| topic | optical fiber sensor Brillouin gain spectrum Brillouin frequency shift Lorenz local single peak fitting algorithm signal symmetry |
| url | https://www.mdpi.com/2073-8994/13/7/1166 |
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