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本文以等效电阻率法为理论基础,导出了几种常见情况下,体极化介质表面上一次电流场和二次极化电流场以及总电流场的面电荷密度的表达公式,并分别对点电流源场中多层介质分界面上的面电荷密度及在均匀电流场中球状和水平圆柱状极化体表面上的面电荷密度进行了具体计算,得到了某些表征电荷分布规律的理论曲线。利用本文中给出的研究结果,可以简便地对一次电流场和二次极化电流场的异常电位及异常电流强度的分布特征,进行定性分析和定量研究。
In this paper, based on the equivalent resistivity method, the expressions of the surface charge density of the primary current field, the secondary polarization current field and the total current field are derived under several common conditions. The surface charge density at multi-layer dielectric interface in point current source field and the surface charge density at the surface of spherical and horizontal cylindrical polarizers in a uniform current field are calculated. Some theories of charge distribution are obtained curve. The results presented in this paper can be used to qualitatively analyze and quantitatively study the distribution characteristics of the anomalous electric current and the anomalous electric current in the primary and secondary polarized current fields.