Efficient deployment of fiber-optic cable seismic sensors

Neil C. Rowe

doi:10.1117/12.850462

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7 May 2010 Efficient deployment of fiber-optic cable seismic sensors

Neil C. Rowe

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Proceedings Volume 7693, Unattended Ground, Sea, and Air Sensor Technologies and Applications XII; 76930T (2010) https://doi.org/10.1117/12.850462
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

We explore the options in deployment of fiber-optic cables as seismic sensors, a technology that has only become practical recently. Cables provide sensing capabilities along their lengths and thus provide a fundamentally different capability than the traditional point sensors. Furthermore, cables can have gradual curves, and this enables deployments to be fit precisely to sensing needs such as irregularities in the terrain. We discuss grid deployments and contrast them with curving deployments such as regular and irregular spirals. We discuss how to manage deployments over terrain with varying degrees of interest for monitoring. We then discuss some of the processing challenges in analyzing data where one dimension (distance) is much more precise than another (time of occurrence). Key concerns are in detecting changes in speed and direction, which can be tracked if processors hand off data to one another at known turn points such as road intersections. We discuss a bent-cable deployment that can facilitate such tracking.

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Neil C. Rowe "Efficient deployment of fiber-optic cable seismic sensors", Proc. SPIE 7693, Unattended Ground, Sea, and Air Sensor Technologies and Applications XII, 76930T (7 May 2010); https://doi.org/10.1117/12.850462

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