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本文运用时域有限差分法(FDTD)计算埋地物体的瞬态电磁散射,研究了目标的电磁脉冲响应与介质参数和地下结构的关系,为时域探地系统的目标检测和识别提供了一定的理论依据。本文的方法适用于任意形状的柱体目标以及任意二维地下结构,也易于推广到三维的情形。
In this paper, the transient electromagnetic scattering of buried objects is calculated by the FDTD method. The relationship between the electromagnetic impulse response of the target and the medium parameters and the subsurface structure is studied, which provides a certain measure for the target detection and recognition in the time-domain exploration system The theoretical basis. The method in this paper is suitable for any shape of cylinder objects and any two-dimensional subsurface structure, and is easy to generalize to the three-dimensional situation.