伪随机信号在高密度电法中的应用  

The Application of Pseudo-random Signals in High Density Resistivity Method

作　　者：马超[1] 王君[1] 许鹏[1] 朱士[1] 何刚[1] 

机构地区：[1]吉林大学仪器科学与电气工程学院,长春130021

出　　处：《科学技术与工程》2014年第28期168-171,共4页Science Technology and Engineering

摘　　要：在物探找矿领域中,由于电极极化效应存在的原因,常规的直流高密度电法无法完成极化率的测量,而双电极系统造价高昂、操作复杂、使用不便。为了解决上述问题,提出将伪随机信号利用到交流电法中,伪随机信号的特点是一次供电分频提取,能够得到同一频率下的视电阻率,从而消除了电极极化效应的影响,测量出的较为准确的地质体的百分频散率同样有利于确定矿体的种类和分布情况。本文将对伪随机信号在交流高密度电法中的使用原理、以及百分频散率的测量原理进行详尽的介绍。In the field of geophysical prospecting, due to the existence of the polarization effect of electrode, the conventional de high density resistivity method cannot complete the measurement of polarization, and double electrode system is expensive,complex to operate and difficult to use. In order to solve the above problems, we put forward the using of pseudo random signal to the alternating current （ac） method, the characteristics of the pseudo random signal is the same voltage supplied and divided frequency extracted, and the apparent resistivity obtained under the same frequency, thus the effect of electrode polarization effects is eliminated, the measured and more accurately percentage dispersion rate is same conducive to the dispersion to determine the type and distribution of the ore body. The using pseudo random signal in AC Hair of high-density electrical method and measurement principle of the percentage dispersion rate will be carries on the detailed introduction in this article.

关 键 词：高密度电法 直流电法 交流电法 伪随机信号 极化率 百分频散率 

分 类 号：P319.3[天文地球—固体地球物理学]