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22 August 2000 Characterization of single-waterjet-induced thermal profile for antipersonnel land mine detection and discrimination
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IR imaging has been used for landmine detection and discrimination by exploiting the variations in temperature profile on the surface, which may be induced by natural phenomenon such as diurnal cycles or using artificial means such as heated waterjets. While the former method has, in general, not been able to reliably detect and discriminate for small antipersonnel mines, the latter suffers from poor response time. Our previous research has shown that, for waterjet induced thermal images, it takes approximately 15 minutes for the profile of the buried object before it is available on the surface. In this paper we explore the possibility of using thermal profile induced by a single heated water jet when viewed directly into the hole created by the waterjet. A heated waterjet, as it penetrates the ground cover, also digs a hole through which the heat radiates out. The spatial and temporal variation of the heat profile in and around the hole has shown to be rich in information about the buried object. Moreover, the response is much faster when compared to the conduction of heat through the soil to the surface. This paper will present the basic phenomenology and characterize such thermal images induced by single heated waterjet. The spatial and temporal variations are used to detect the presence of an object and its material type. Some possibility to measure the depth of the buried object is also explored.
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Sanjeev Agarwal and O. Robert Mitchell "Characterization of single-waterjet-induced thermal profile for antipersonnel land mine detection and discrimination", Proc. SPIE 4038, Detection and Remediation Technologies for Mines and Minelike Targets V, (22 August 2000);

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