摘要
由逆拉普拉斯变换将均匀大地面上的电偶极子源谐变电磁场转换为瞬变电磁场，并计算出Ｂｚ（ｔ）ｔ瞬态曲线；对分层大地面上的瞬变电磁场，采用折线逼近法计算余弦变换得出Ｈｚ（ｔ）瞬态曲线。从计算结果分析可知，瞬变电磁测深可实现较小极距探测较大深度。
The harmonic field of electric dipole source on the uniform earth surface is converted into transient field by inverse Laplace transform,and the Bz(t)/ t transient curve is calculated.The Hz(t) transient curves on the stratified earth surface are obtained from cosine transform calculated by broken line approximation.From the analysis of calculating results it can be seen that the greater depth explored with the smaller offset in the TEM sounding could be achieved.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
1999年第3期58-61,共4页
Coal Geology & Exploration
关键词
电偶极子
地面
瞬变电磁场
磁测深
electric dipole source
earth surface
TEM field
study
