导电导磁球形矿体上空脉冲航电响应的解释方法

INTERPRETATION METHOD OF THE TIME-DOMAIN AEM RESPONSE ABOVE A CONDUCTING SPHERICAL OREBODY WITH PERMEABILITY

本文根据我国M—1型航电仪的实际参数,计算了导电导磁球体在脉冲偶极场激发下产生的电磁响应,并且绘制出可供野外解释人员实际应用的解释列线图。 M—1型航电仪属于时间域吊舱式航电系统。其特点是由绕在机翼、机尾端点的发射线圈发射一系列正负交替的脉冲磁场,在脉冲间歇期间。

This paper describes an interpretation method for the time-domain AEM response above a spherical conductor. The formulations of the time-domain AEM response of the sphere in dipole field are developed. The responses of different spheres were computed with the parameters of a home-made AEM system of impulse type. The diagrams of interpretation presented from the computer results can be used to solve two major problems. The first is to interpret an isolated response measured by the AEM system so that depth, radius and conductivity of conducting sphere will be provided. The second is to estimate amplitude, width and decay characteristic of the response caused by different spherical conductors. Therefore, the diagrams arc useful for the AEM work.