title: Impact wave monitoring in soil using a dynamic fiber sensor based on stimulated brillouin scattering.
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).
authors: National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China. qingsong.research@gmail.com.|Department of Civil and Environmental Engineering, Lehigh University, Bethlehem, PA 18015, USA. qingsong.research@gmail.com.
authors: Qingsong
authors: Q
authors: Cui
authors: Department of Civil and Environmental Engineering, Lehigh University, Bethlehem, PA 18015, USA. sp01@lehigh.edu.
authors: Sibel
authors: S
authors: Pamukcu
authors: Department of Civil and Environmental Engineering, Lehigh University, Bethlehem, PA 18015, USA. mepa@lehigh.edu.
authors: Mesut
authors: M
authors: Pervizpour