摘要
本文提出一种通过测磁场确定面极化和体极化介质中二次极化电流的新方法.它与以往测电场的方法有所不同.当时域单向长脉冲激发电流通过面极化和体极化介质时,便在其表面和内部产生激发极化效应.在通电时间内和断电后的放电过程中,若极化介质内产生了二次极化电流,它必将在周围产生二次磁场.我们通过观测二次磁场可靠地确定了介质中二次电流的存在与否和量值大小以及矢量方向等重要内容.本文除给出一些实验结果外,还给出了实例.多年来,国内、外学者对体极化介质中二次极化电流的存在问题是有争议的,本文对此给出了具有充分说服力的实验结果,有利于统一这方面的认识.
By determining magnetic field, a new method that can define secondary polarization current in surface and volume polarized medium is advanced in this paper. In essence, it is different from the method that only determines electric field or current. When an excitation current of time domain, single signal or long pules, passes through the surface and volume polarized medium, an induced polarization (IP) effect is produced at surface and inside of the polarized body. If in polarized medium the secondary polarized current has been produced by virtue of IP effect in electrified time and in discharge process after breaking current, then the polarized medium will produce a secondary magnetid field around it.By observing magnetid field, some important contents in surface and volume polarized medium, such as the secondary polarized current exists or not, how large value is, and what is the vector's direction, have been reliably determined.Besides some experiment results, field results are given in this paper.For many years, the scholares at home and abroad have different views to the secondary polarized current exists or not in volume polarized medium. Therefore, this paper gives some experimental results that have convincing arguments, contributing to the standardization of the recognition in this aspect.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第6期722-732,共11页
Chinese Journal of Geophysics
关键词
激发
极化法
极化
电流
体极化
Induced polarization, Basis theory, Secondary polarized current, Secondary magnetic field, Volume polarization, Surface polarization.
