Modeling the Detection and Localization of Anti-Personnel Landmines Buried in Rough Soil using Direct Ground Contact GPR

Abstract

In 2008, over 5,000 casualties due to landmines were reported worldwide necessitating the development of effective detection techniques. Over the last few decades ground penetrating radar (GPR) has developed into a popular tool for subsurface imaging and a promising technique to fulfill this requirement. Landmines, however, are typically buried under rough surfaces where conventional air-coupled GPR is generally difficult to analyze since the surface scatters the signal in unpredictable ways. By utilizing a ground-coupled system, signal penetration is dramatically improved and data analysis is simplified. Using a 3-dimensional finite-difference time domain (FDTD) model this research demonstrates the feasibility of using three bistatic ground-coupled antennas to triangulate the location of an anti-personnel landmine buried in rough dispersive soil. The results for various target locations are analyzed using both metal and plastic casings and 16 different random surfaces are compared. This poster also presents the current translation from theory to practicality. Realistic limitations in antenna design are considered for which an updated detection model is developed. This method is based on the Tri-Sphere Multi-Modal Platform developed by Square One Systems Design. Note that though this research currently focuses on localizing landmines, this technology has numerous potential subsurface imaging applications for rough topography.