GROUND-PENETRATING RADAR AND IMAGING METAL DETECTOR FOR ANTIPERSONNELMINE DETECTION

DeTeC (Demining Technology Center) is developing a sensor system for h umanitarian demining enabling reduction in the number of false alarms and usable by a man or an autonomous robot (see http://diwww.epfl.ch/l ami/detec/). We have chosen to concentrate our first experiments on a commercial impulse ground penetrating radar with a 1 GHz antenna and a metal detector used for imaging purposes. The metal detector should h elp to distinguish two objects with similar radar echoes but different metal content, e.g. a mine and a stone of the same size. The GPR shou ld in turn differentiate a mine from metallic debris, which often give s a similar metal detector answer. An experimental setup, consisting o f a double sandbox with a computerized system that allows the automate d positioning of the sensors, has been constructed. Preliminary result s of data acquisition and treatment on both sensor technologies are pr esented with a comparison between the metal detector and the GPR data. (C) 1998 Elsevier Science B.V. All rights reserved.