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27 March 2022 Spatial attenuation study of the vibration sensed by DAS at different radial distances
Yufeng Wang, Yuwen Sun, Xinyu Liu, Yunlin Tu, Lishuang Yao, Yuanfeng Song, Yu Wu, Huijuan Wu, Yunjiang Rao
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Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 121697D (2022) https://doi.org/10.1117/12.2624999
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China
Abstract
In the underground environment, it is the most challenging for two-dimensional (2-D) localization of the ground-borne vibration sensed by the buried fiber cable, especially for the location estimation in the radial direction, due to the complicated inhomogeneous geophysical structure. Thus, in this paper, feature extraction and representation with the spatial power spectral distribution is studied for the fiber-optic distributed acoustic sensor (DAS), and the fundamental spatial attenuation law is discussed from the field results when the vibration source is located at different radial distances. The field test has proved that the spatial power spectral distribution can represent the differences at different radial distances well, which provides a promising way to improve the 2-D localization performance of the ground-borne vibration source sensed by the fiber buried in complicated underground environment.
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Yufeng Wang, Yuwen Sun, Xinyu Liu, Yunlin Tu, Lishuang Yao, Yuanfeng Song, Yu Wu, Huijuan Wu, and Yunjiang Rao "Spatial attenuation study of the vibration sensed by DAS at different radial distances", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 121697D (27 March 2022); https://doi.org/10.1117/12.2624999
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KEYWORDS
Fiber optics sensors
Optical fibers
Sensors
Signal processing
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