直接同时提取激电效应的方波相干法

THE SQUARE WAVE COHERENT METHOD TO EXTRACT IP EFFECT DIRECTLY AND SIMULTANEOUSLY

利用电磁感应耦合效应和激电效应在双频测量波形上的特殊表现形式，提出了一种在测量时直接提取激电效应的方波相干方法．数值计算和模拟实验结果表明，利用该方法可以极大地压制电磁感应耦合效应，从而在野外测量中直接将其消除．应用该方法研制成的仪器在水槽实验中效果良好．

Based on the special appearance of EM effect and IP effect in measured dual-frequency wave form,the square wave coherent method to extract the IP effect directly and simultaneously is proposed in this paper. The results of numerical calculation and experiments show that the IP effect extracted includes little EM effect. Therefore, the EM effect can be directly eliminated in field measuring. The instrument made on this method works well in the waterbath experiments.