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直流电法勘探大都用点状电极供电和测量,地下是点源电场。由于点源电场的理论研究和模型实验比较困难,甚至无法开展,因而往往借用线源电场的理论计算(如保角变换)和模型实验(如二度电阻网络、导电纸)的成果,来解释野外实测的点源场资料。在点、线源电场中,同一地电体的异常形态在一定程度上固然相象,但由于两种场的分布规律有差别,致使在这两种场中测得
Most of the DC method exploration with point-shaped electrode power supply and measurement, underground is the point source electric field. Due to the theoretical and model experiments of point-source electric fields, which are difficult or even impossible to be performed, they are often explained by the theoretical calculations (such as conformal transformation) and model experiments (such as the second resistance network and conductive paper) of the source electric field Field measured point source field data. In point, the source electric field, the same geoelectric anomaly morphology to some extent, alike, but because of the distribution of the two fields are different, resulting in the two fields measured