Φ-OTDR disturbance localization of communication optical cable based on moving variance average and spectral subtraction
To address the issue of low signal-to-noise ratio in disturbance localization on power communication optical cables caused by environmental noise in phase sensitive-optical time domain reflectometry (Φ-OTDR) systems, the Φ-OTDR localization technique is investigated based on moving variance averagin...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Department of Electric Power Engineering Technology
2025-05-01
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| Series: | 电力工程技术 |
| Subjects: | |
| Online Access: | https://doi.org/10.12158/j.2096-3203.2025.03.020 |
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| _version_ | 1849735829908357120 |
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| author | Wei SHEN Xin HU Ze ZHANG Ling JU Jian WU Yi HUANG |
| author_facet | Wei SHEN Xin HU Ze ZHANG Ling JU Jian WU Yi HUANG |
| author_sort | Wei SHEN |
| collection | DOAJ |
| description | To address the issue of low signal-to-noise ratio in disturbance localization on power communication optical cables caused by environmental noise in phase sensitive-optical time domain reflectometry (Φ-OTDR) systems, the Φ-OTDR localization technique is investigated based on moving variance averaging and spectral subtraction. A coherent detection Φ-OTDR system is built to connect optical fibers and optical cables to carry out galloping simulation experiments. The backward Rayleigh scattering signal is acquired by using the system and the scattering signal is demodulated to obtain the amplitude signal curve. By selecting an appropriate number of curves and an optimal step size, the amplitude signal curves are processed using moving variance average to generate a preliminary disturbance localization map. To suppress ambient noise outside the localization region, noise reduction using spectral subtraction is performed to achieve enhanced localization. A comparative analysis is conducted between spectral subtraction and two alternative noise reduction methods-wavelet decomposition and empirical mode decomposition. The results demonstrate that spectral subtraction significantly outperforms the other two algorithms in localization effectiveness, achieving an SNR improvement exceeding 20 dB while maintaining a computational time as low as 0.58 s. |
| format | Article |
| id | doaj-art-58e845b7072e45e5811ae3852d82889f |
| institution | DOAJ |
| issn | 2096-3203 |
| language | zho |
| publishDate | 2025-05-01 |
| publisher | Editorial Department of Electric Power Engineering Technology |
| record_format | Article |
| series | 电力工程技术 |
| spelling | doaj-art-58e845b7072e45e5811ae3852d82889f2025-08-20T03:07:27ZzhoEditorial Department of Electric Power Engineering Technology电力工程技术2096-32032025-05-0144321121810.12158/j.2096-3203.2025.03.020shenweiΦ-OTDR disturbance localization of communication optical cable based on moving variance average and spectral subtractionWei SHEN0Xin HU1Ze ZHANG2Ling JU3Jian WU4Yi HUANG5State Grid Taizhou Power Supply Company of Jiangsu Electric Power Co., Ltd., Taizhou 225300, ChinaState Grid Taizhou Power Supply Company of Jiangsu Electric Power Co., Ltd., Taizhou 225300, ChinaState Grid Taizhou Power Supply Company of Jiangsu Electric Power Co., Ltd., Taizhou 225300, ChinaState Grid Taizhou Power Supply Company of Jiangsu Electric Power Co., Ltd., Taizhou 225300, ChinaState Grid Taizhou Power Supply Company of Jiangsu Electric Power Co., Ltd., Taizhou 225300, ChinaKey Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, ChinaTo address the issue of low signal-to-noise ratio in disturbance localization on power communication optical cables caused by environmental noise in phase sensitive-optical time domain reflectometry (Φ-OTDR) systems, the Φ-OTDR localization technique is investigated based on moving variance averaging and spectral subtraction. A coherent detection Φ-OTDR system is built to connect optical fibers and optical cables to carry out galloping simulation experiments. The backward Rayleigh scattering signal is acquired by using the system and the scattering signal is demodulated to obtain the amplitude signal curve. By selecting an appropriate number of curves and an optimal step size, the amplitude signal curves are processed using moving variance average to generate a preliminary disturbance localization map. To suppress ambient noise outside the localization region, noise reduction using spectral subtraction is performed to achieve enhanced localization. A comparative analysis is conducted between spectral subtraction and two alternative noise reduction methods-wavelet decomposition and empirical mode decomposition. The results demonstrate that spectral subtraction significantly outperforms the other two algorithms in localization effectiveness, achieving an SNR improvement exceeding 20 dB while maintaining a computational time as low as 0.58 s.https://doi.org/10.12158/j.2096-3203.2025.03.020optical cable monitoringphase sensitive-optical time domain reflectometry (φ-otdr) systemdisturbance localizationamplitude signalmoving variance averagespectral subtraction |
| spellingShingle | Wei SHEN Xin HU Ze ZHANG Ling JU Jian WU Yi HUANG Φ-OTDR disturbance localization of communication optical cable based on moving variance average and spectral subtraction 电力工程技术 optical cable monitoring phase sensitive-optical time domain reflectometry (φ-otdr) system disturbance localization amplitude signal moving variance average spectral subtraction |
| title | Φ-OTDR disturbance localization of communication optical cable based on moving variance average and spectral subtraction |
| title_full | Φ-OTDR disturbance localization of communication optical cable based on moving variance average and spectral subtraction |
| title_fullStr | Φ-OTDR disturbance localization of communication optical cable based on moving variance average and spectral subtraction |
| title_full_unstemmed | Φ-OTDR disturbance localization of communication optical cable based on moving variance average and spectral subtraction |
| title_short | Φ-OTDR disturbance localization of communication optical cable based on moving variance average and spectral subtraction |
| title_sort | φ otdr disturbance localization of communication optical cable based on moving variance average and spectral subtraction |
| topic | optical cable monitoring phase sensitive-optical time domain reflectometry (φ-otdr) system disturbance localization amplitude signal moving variance average spectral subtraction |
| url | https://doi.org/10.12158/j.2096-3203.2025.03.020 |
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