Measurement of multiple vibration points  by using POTDR

Mengmeng Chen; Feng Wang; Yixin Zhang; Xuping Zhang

doi:10.1117/12.2291618

10 January 2018 Measurement of multiple vibration points by using POTDR

Mengmeng Chen, Feng Wang, Yixin Zhang, Xuping Zhang

Proceedings Volume 10618, 2017 International Conference on Optical Instruments and Technology: Advanced Optical Sensors and Applications; 1061803 (2018) https://doi.org/10.1117/12.2291618
Event: International Conference on Optical Instruments and Technology 2017, 2017, Beijing, China

Abstract

An improved data processing and analysis method is proposed to realize simultaneous monitor of multiple vibrations using polarization optical time domain reflectometry system. In our method, a differential trace of the frequency component along the fiber is got by doing subtraction of the distance traces with different number of vibrations at a certain frequency, and the vibrations vibrating at different time can be located by analyzing the response power variation of the differential trace. For multiple vibration points vibrating with the same frequency and at the same time, multiple vibration events can also be distinguished by extracting the modulated frequency component, and the frequency component is obtained at the starting or ceasing state of the vibrations because the initial phases of vibration sources are unsteady and different. With our method, a POTDR sensing system which can simultaneously monitor multiple vibration points over 3km with 10m spatial resolution is demonstrated.

Citation Download Citation

Mengmeng Chen, Feng Wang, Yixin Zhang, and Xuping Zhang "Measurement of multiple vibration points by using POTDR", Proc. SPIE 10618, 2017 International Conference on Optical Instruments and Technology: Advanced Optical Sensors and Applications, 1061803 (10 January 2018); https://doi.org/10.1117/12.2291618

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