低感应数条件下大地电导率测量方法研究

Research of the electromagnetic terrain conductivity measurement at low induction numbers

本文论述一种测量大地电导率的电磁感应方法.通有交变电流的磁偶极子会在大地中产生一次磁场和二次磁场.在低感应数的条件下,大地电导率与一次磁场和二次磁场的比值是一种简单的线性关系.利用这种关系,我们就可以直接获取地下大地视电导率.文章还论述了引出了积累响应函数和相对响应函数,给出一种简单的数据解释方法.

This paper outlines an electromagnetic method used for measuring the terrain conductivity. A magnetic dipole with an alternating current would generate a primary magnetic field and a secondary magnetic field in the earth. The terrain conductivity is linearly proportional to the ratio of the secondary to the primary magnetic field at low induction numbers. We can get the terrain conductivity by simply measuring this ratio. The paper also introduces cumulative response and relative response functions and gives a simple data interpretation method.