Effects of thin metal outer case and top air gap on thermal IR images of buried antitank and antipersonnel land mines

被引:19
作者
Khanafer, K [1 ]
Vafai, K
Baertlein, BA
机构
[1] Univ Calif Riverside, Dept Mech Engn, Riverside, CA 92521 USA
[2] Ohio State Univ, Dept Elect Engn, Columbus, OH 43210 USA
来源
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2003年 / 41卷 / 01期
关键词
blind mine signature; buried mines; flat soil surface; infrared imaging signature; thin metal outer case; top air gap; very shallow buried mine;
D O I
10.1109/TGRS.2002.807755
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
A numerical simulation is carried out to study the effect of the thin metal outer case of an antitank mine and the top air gap of an antipersonnel mine on the passive infrared imaging Signature. In addition, an antipersonnel surface mine is also analyzed in the present investigation to show its effect on the soil thermal content. The effect of short- and long-wavelength radiation as well as the convective heat transfer is incorporated in this analysis. The temporal development of the temperature distribution over a diurnal cycle is presented for both buried mines. The results show that the thin metal outer case of a buried antitank mine and the top air space of a buried antipersonnel mine have a pronounced effect on the depthwise temperature through the soil. Also, the results show that both buried mines have a noticeable effect on the intensity of the landmine signature on the soil-top surface over a diurnal cycle. A nonexisting mine signature on the soil-top surface is established for an antitank mine with a thin metal outer case. An almost nonexistent signature is also in evidence for the antipersonnel mine with or without an air gap. The results of the present investigation show that the thermal signature of a surface mine produces much larger temperature extremes than the thermal signature of a buried mine. These results play an important role in producing more effective techniques for mine imaging detection.
引用
收藏
页码:123 / 135
页数:13
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