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Sensors 2015, 15(4), 8163-8172; doi:10.3390/s150408163

Impact Wave Monitoring in Soil Using a Dynamic Fiber Sensor Based on Stimulated Brillouin Scattering

1
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
2
Department of Civil and Environmental Engineering, Lehigh University, Bethlehem, PA 18015, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M.N. Passaro
Received: 2 February 2015 / Revised: 25 March 2015 / Accepted: 26 March 2015 / Published: 8 April 2015
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [1197 KB, uploaded 8 April 2015]   |  

Abstract

The impact wave response of soil due to a ball drop is monitored on a 30.5 cm by 30.5 cm square soil box using a fiber sensor with dynamic strain sensing capability. The experiments are conducted in real time using a simple one-laser one-modulator configuration with stimulated Brillouin scattering. The embedded BOTDA sensor grid successfully monitored the distribution and evolution of the inner strains of a sand bed during a mass impact on its surface. The measurement of the distributed dynamic strains was possible in several milliseconds and with 1 cm actual location resolution. This paper presents a time-domain signal analysis utilized for determining the dynamic strains in embedded fiber sensor. The results demonstrate the method to be a promising one for detection of subsurface vibration and movement in geotechnical Structure Health Monitoring (SHM). View Full-Text
Keywords: Brillouin scattering; underground; infrastructure; dynamic strains; vibration Brillouin scattering; underground; infrastructure; dynamic strains; vibration
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Cui, Q.; Pamukcu, S.; Pervizpour, M. Impact Wave Monitoring in Soil Using a Dynamic Fiber Sensor Based on Stimulated Brillouin Scattering. Sensors 2015, 15, 8163-8172.

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