1、瞬变电磁法的测量原理瞬变电磁法的测量原理是利用不接地回线(或电偶源)向地下发送一次脉冲磁场(或电场),在磁场的激励下,地质体内产生涡流,其大小取决于该地质体的导电能力,导电能力强则感应涡流强。当一次场消失后,涡流不能立即消失,它将有一个过渡过程(衰减过程),该过渡 1, the transient electromagnetic method of measurement principle Transient electromagnetic method of measurement is the use of ungrounded return line (or galvanic source) to the underground to send a pulsed magnetic field (or electric field), under the excitation of the magnetic field, resulting in geological turbulence, Its size depends on the conductivity of the geological body, conductivity is strong induced eddy current. When a field disappears, the vortex can not disappear immediately, it will have a transitional process (decay process), the transition