电磁干扰实验研究  

Experimental Research on the Interferenge of Electric Field and Magnetic Field

作　　者：张继红[1] 李波[2] 韩海华[2] 李润贤 佟瑞清[2] 赵会蓬[2] 

机构地区：[1]中国科学技术大学 [2]山东省地震局,济南250014 [3]菏泽市地震局,菏泽274026

出　　处：《中国地震》2005年第3期429-436,共8页Earthquake Research in China

基　　金：山东省地震局科技项目资助

摘　　要：本文分析了地电、地磁同台观测中出现的干扰问题,并针对地电观测对地磁场测量的影响进行了研究。通过实地测量和对长直导线产生的磁场模拟计算,得出不同距离(20～120m)的感应磁场强度值,由此判断通电导线对周围地磁场的影响。结果表明:电流为2A时,单根导线距地磁场观测点距离应大于150m;导线两侧在相等距离处对地磁总场的干扰并不遵循“数值相等,方向相反”的规律,而是一侧增加量大于另一侧减少量。这项实验研究为地磁、地电同台观测及排除干扰提供了有价值的依据。Interferences in a synthetic observation of apparent resistivity and geomagnetism are analyzed and experimental study on this problem. By measuring a geomagnetic field and numerical modeling of the magnetic field caused by long straight conducting wire, it indicates that the induction magnetic field change due to the different distances（20～120m）. Defining the geomagnetic field is influenced by the current-conducting wire. Results show that there are 150m far away between the geomagnetic observation room and the single current line of 2A. The interference of the geomagnetic field don＇t follow “the same value and the opposite direction” in the equidistance two sides of the conducting wire. But it is shown that increase more than decrease. Those experimental and theoretical resuhs could be applied at those stations with synthetic observation of apparent resistivity and geomagnetism. It also provides basis for elimination the interferences.

关 键 词：地磁场 地电场 电磁感应 

分 类 号：P318[天文地球—固体地球物理学]