Time-reversal focusing of elastic waves in inhomogeneous media: an application to an elastic-wave landmine detection system

Pelham D. Norville; Waymond R. Scott Jr.

doi:10.1117/12.603980

10 June 2005 Time-reversal focusing of elastic waves in inhomogeneous media: an application to an elastic-wave landmine detection system

Pelham D. Norville, Waymond R. Scott Jr.

Author Affiliations +

Proceedings Volume 5794, Detection and Remediation Technologies for Mines and Minelike Targets X; (2005) https://doi.org/10.1117/12.603980
Event: Defense and Security, 2005, Orlando, Florida, United States

Abstract

Time-reversal focusing is studied in the context of an elastic-wave landmine-detection system. Time-reversal focusing has been previously applied to the system and proven to be useful in focusing energy to targets in inhomogeneous media with discrete non-uniform scattering objects. In earlier experiments, these scattering objects took the form of multiple rocks buried throughout the region of interest. In this study, the performance of time-reversal focusing is evaluated for the case of uniform discrete scattering objects. Cylindrical and spherical scatterers are buried below the surface to provide uniform scattering. In other media, high concentrations of uniform scatterers have been observed to produce super-resolution of the time-reversal focus point. In this paper, the super-resolution phenomenon is examined in the context of the elastic wave landmine detection system operating in a soil medium.

Citation Download Citation

Pelham D. Norville and Waymond R. Scott Jr. "Time-reversal focusing of elastic waves in inhomogeneous media: an application to an elastic-wave landmine detection system", Proc. SPIE 5794, Detection and Remediation Technologies for Mines and Minelike Targets X, (10 June 2005); https://doi.org/10.1117/12.603980

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