水下金属目标的电磁干扰检测与分类

F. Shubitidze, B. Barrowes, I. Shamatava
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引用次数: 0

摘要

研究导电多层环境下的电磁感应(EMI)传感现象,以辅助水下未爆弹药的探测与分类。海洋环境的复杂性,如盐度梯度、空气-水-沉积物电导率的急剧变化等,会对目标的电磁干扰信号产生不利影响,使水下目标分类比陆地上相同的埋藏目标分类更加困难。利用无条件稳定的Crank-Nicolson有限不同时域方法(FDTD)研究了水下环境中二次电磁干扰信号相对于水/空气和/或水/沉积物边界的灵敏度以及电磁干扰场的时间(扩散电磁场传播速度)变异性。
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EMI Sensing for Underwater Metallic Targets Detection and Classification
Electromagnetic induction (EMI) sensing phenomenon are investigated for a conducting and multilayer environment to aid in underwater unexploded ordnance (UXO) detection and classification. The marine environment introduces complexities, such salinity gradient, sharp conductivity changes at air-water-sediment etc., which adversely can affect targets EMI signals and make underwater targets classification more difficult problem than classifying the same buried targets on land. The sensitivity of a secondary EMI signal with respect the water/air and/or water/sediment boundaries and temporal (diffusive EM field propagation speed) variability of EMI fields in an underwater (UW) environment are studied and demonstrated using the unconditionally stable Crank-Nicolson finite different time domain method (FDTD).
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