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23 April 2017 Slope-assisted BOTDR for pipeline vibration measurements
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Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103235Z (2017)
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of
Brillouin distributed optical fiber strain sensors are often limited to static events because of the long acquisition time due to the classic frequency sweep technique. Recently, BOTDA sensor based on slope-assisted (SA) method has been proposed for fast strain measurement along the sensing fiber. In this paper, we present a novel dynamic SA-BOTDR for single-ended truly distributed strain measurement. Geometrical displacement and damping time of a 10.4 m instrumented pipe with a 3 glued fibers system. A 7.6 Hz acquisition rate was achieved with a strain error of 40 με and a 1m spatial resolution. From integration of longitudinal strains, local pipe displacement is calculated with a 12 mm precision.
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Damien Maraval, Renaud Gabet, Yves Jaouën, and Vincent Lamour "Slope-assisted BOTDR for pipeline vibration measurements", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103235Z (23 April 2017);

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