11 September 2003 Investigations of horizontally truncated scattering models for acoustic landmine detection
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Landmines buried in the ground can be found acoustically by insonifying the ground and detecting a contrast between the vibratory motion of the ground surface directly above the mine and away from the mine. A technique for the numerical computation of the scattered velocity field is presented here. The mine is assumed to be a rigid cylinder with a compliant top. The ground (soil) is modeled both as an effective fluid and as an elastic effective solid. To discretize the full space model, the computational domain is taken to be a cylindrical waveguide of sufficiently large radius. It is shown that the method converges for the effective fluid case providing qualitative understanding of the field data. However, in the case of an elastic solid, a surface wave propagates radially out from the mine limiting the applicability of the method in its current form. Comparisons with actual field velocity data will also be presented.
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Doru Velea, Roger M. Waxler, and James M. Sabatier "Investigations of horizontally truncated scattering models for acoustic landmine detection", Proc. SPIE 5089, Detection and Remediation Technologies for Mines and Minelike Targets VIII, (11 September 2003); doi: 10.1117/12.486346; https://doi.org/10.1117/12.486346


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