EVREUYUMLU ALGILAMA TABANLI FAZ-OTDR SORGULAYICI ÜNİTE GELİŞTİRİLMESİ

Öz

Bu çalışmada, evre uyumlu algılayıcıya sahip bir faza duyarlı frekans bölgesinde optik yansıtıcı (faz-OTDR) ünitesi deneysel olarak gerçeklenmiştir. Faz-OTDR izlerine ait genlik ve faz cevaplarının hesaplanmasını sağlayan analiz algoritmaları geliştirilmiştir. Sözkonusu algoritmaların fiber üzerine tek veya aynı anda iki noktada titreşim uygulandığında, titreşim konum ve frekansını tespit kabiliyeti deneysel olarak gösterilmiştir. Yavaş-zaman analizleri ile elde edilen sonuçlar, makalede tartışılan matematiksel ispat ile uyumlu sonuç vermiştir. Makalede ele alınan sensör sorgulama ünitesi, dağıtık titreşim algılayıcılar kullanılarak trenyolu izleme sistemleri tasarımı gibi pek çok teknolojik alanda etki yaratma potansiyeli taşımaktadır.

Anahtar Kelimeler

• Evreuyumlu algılama,Faz-OTDR,Fiber optic algılayıcı

Development of a Phase-OTDR Interrogator Based on Coherent Detection Scheme

Öz

We present in this work, the experimental demonstration of a phase-sensitive Optical Time-Domain Reflectometer (phase-OTDR) having coherent detection scheme. An analysis algorithm has also been developed to calculate amplitude and phase evolution of the experimental phase-OTDR traces. The efficiency of the analysis algorithm to determine the position of the applied vibration has been verified for a single and two simultaneous vibrations. The slow-time analysis results show a good agreement with the mathematical calculations discussed in the paper. This work could have a technological iplication in many fields such as distributed vibration sensor for railway monitoring applications.

Anahtar Kelimeler

• Coherent detection,Phase-OTDR,Fiber optic sensor

Kaynakça

1. Aktaş, M., Akgün, A., Demircin, M. U. and Büyukaydın, D. (2017) Deep learning based multi-threat classification for phase-OTDR fiber optic distributed acoustic sensing applications, Proc. SPIE 10208, Fiber Optic Sensors and Applications XIV, 102080G, doi: 10.1117/12.2262108
2. He, H., Shao, L. Y., Li, Z., Zhang, Z., Zou, X., Luo, B., Pan, W. and Yan, L. (2016) Self-Mixing Demodulation for Coherent Phase-Sensitive OTDR System, Sensors, 16(5), 681, doi:10.3390/s16050681
3. Jason, J., Yüksel, K. and Wuilpart, M. (2017), Laboratory evaluation of a phase-OTDR setup for railway monitoring applications, IEEE Photonics Society, Annual Symposium, Delft, pp 18-21
4. Jason, J., Popov, S. M., Butov, O. V., Chamorovskiy, Y. K., Golant, K. M., Fotiadi, A. A. and Wuilpart, M. (2018) Sensitivity of high Rayleigh scattering fiber in acoustic/vibration sensing using phase-OTDR, SPIE Photonics Europe, Strasbourg, Vol. 10680, doi:10.1117/12.2307569
5. Juarez, J. C., Maier, E. W., Choi K. N. and Taylor, H. F. (2005) Distributed Fiber-Optic Intrusion Sensor System, J. of Lightwave Technology, 23(6), 2081-2087. doi:10.1109/JLT.2005.849924
6. Lu, Y., Zhu, T., Chen, L. and Bao, X. (2010) Distributed Vibration Sensor Based on Coherent Detection of Phase-OTDR, J. of Lightwave Technology, 28(22), 3243-3249. doi:10.1109/JLT.2010.2078798
7. Liu, Y., Liu, X., Jin, B., Bai, Q., Wang, Y., Wang, D., Wang, Y. (2016) Distributed Fiber-Optic Sensors for Vibration Detection”, 
Sensors, 16(8), 1164. doi:10.3390/s16081164
8. Madsen, K. N., Thompson, M., Parker, T. and Finfer, D. (2013) A VSP field trial using distributed acoustic sensing in a producing well in the North Sea, 74thEAGE Conference & Exhibition, Extended Abstracts, 31(11), 51-56. doi:10.3997/1365-2397.2013027

9. Maral, H., Akgun, T. and Aktas, M. (2018), Adaptive power thresholding for real time threat detection in distributed acoustic sensing systems, 26thSignal Processing and Communications Applications Conference (SIU), 2-5 May, Izmir. doi:10.1109/SIU.2018.8404671
10. Miah, K., Potter, D. K. (2017) A Review of Hybrid Fiber-Optic Distributed Simultaneous Vibration and Temperature Sensing Technology and Its Geophysical Applications, Sensors, 17, 2511. doi:10.3390/s17112511
11. Olcer, I. and Oncu, A. (2017) Adaptive temporal matched filtering for noise suppression in fiber optic distributed acoustic sensing, Sensors, 17(6), 1288. doi: 10.3390/s17061288
12. Pan, Z., Liang, K., Ye, Q., Cai, H., Qu, R. and Fang, Z. (2011), Phi-OTDR system based on digital coherent detection, Proc. of SPIE-OSA-IEEE Asia Communications and Photonics, 8311. doi:10.1364/ACP.2011.83110S
13. Peng, F., Wu, H., Jia, X. H., Rao, Y. J., Wang Z. N. and Peng, Z. P. (2014) Ultra-long high-sensitivity phase-OTDR for high 
spatial resolution intrusion detection of pipelines, Opt. Express, 22(11), 13804-13810. doi:10.1364/OE22.013804
14. Ren, M., Ping, L., Chen, L. Y. and Bao, X. (2016) Theoretical and experimental analysis of Phi-OTDR based on polarization diversity detection, Photonics Technology Letters, 28(6), 697-700. doi:10.1109/lpt.2015.2504968
15. Taylor, H.F (1993), Apparatus and Method for Fiber Optic Intrusion Sensing, U.S. 5194847 A, 16 March 1993.
16. Tu, G., Zhang, X., Zhang, Y., Zhu, F. Xia, L. and Nakarmi, B. (2015) The development of an Phi-OTDR system for quantitative vibration measurement, IEEE Photonics Technol. Lett., 27(12), 1349-1352. doi:10.1109/LPT.2015.2421354
17. Yu, M., Liu, M., Chang, T., Lang, J., Chen, J. and Cui, H. L. (2017) Phase-sensitive optical time-domain reflectometric system based on a single-source dual heterodyne detection scheme, Applied Optics, 56(14), 4058-4064. doi:10.1364/AO.56.004058
18. Wang, Z., Lu, B., Zheng, H., Ye, Q., Pan, Z., Cai, H., Qu, R., Fang, Z. and Zhao, H. (2017) Novel Railway-Subgrade Vibration Monitoring Technology Using Phase-Sensitive OTDR, 25th International Conference on Optical Fiber Sensors, Proc. of SPIE, South Korea, 10323. doi:10.1117/12.2265169