本文讨论了在均匀半空间中带有浸染球壳的球体上中间梯度装置异常的特点。分析了浸染球壳的电性参数(电阻率、极化率)和几何参数(球体中心埋深、浸染球壳的厚度)对中心剖面上激电异常特点的影响。得出了一些基本结论:球壳增加了勘探深度;当利用视极化率曲线或视电阻率曲线求球体中心埋深时,不会引入误差 In this paper, we discuss the characteristics of an abnormity of the intermediate gradi- ent on a spherical sphere with spheroidal shells in a homogeneous half-space. The influence of electrical parameters (resistivity, polarizability) and geometric parameters (the depth of the center of the sphere and the thickness of the shell of the spherule) on the characteristics of the anomalies in the center of the dip shell were analyzed. Some basic conclusions are drawn: the spherical shells increase the exploration depth; when the apparent center-of-curvature curve or the apparent resistivity curve is used to determine the depth of the center of the sphere, no error is introduced