频谱激电测量仪器关键技术研究及实现  

Research and implementation of key technologies of spectral induced polarization instruments

作　　者：石加玉 郭鹏 李勇[3] SHI Jia-Yu;GUO Peng;LI Yong(School of Geophysics and Information Technology,China University of Geosciences(Beijing),Beijing 100083,China;Geophysical Survey Center of China Geological Survey,Langfang 065000,China;Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China)

机构地区：[1]中国地质大学(北京)地球物理与信息技术学院,北京100083 [2]中国地质调查局地球物理调查中心,河北廊坊065000 [3]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000

出　　处：《物探与化探》2021年第6期1475-1481,共7页Geophysical and Geochemical Exploration

基　　金：国家重点研发计划项目“深部矿产资源勘查评价技术联合研究”(2018YFE0208300);自然资源部科技项目“阵列相位激电测量系统完善与推广应用”(1212011220266)。

摘　　要：频谱激电测量交流电场作用下的岩(矿)石的电化学极化效应,即接收电位差与发射电流之间的相位差。在深入研究频谱激电测量仪器关键技术的基础上,设计了全新的弱信号同步相关检测技术,对原型样机进行了实用化改进,优化了电路结构,提高了相位测量的稳定性。矿区试验表明,改进后的频谱激电测量仪器成本更低,抗干扰能力更强,实用化程度更高,适合大范围推广应用。The measurement of the electrochemical polarization effect of rock(ore) in an AC electric field(i.e.,the phase between receiving potential different and transmitting current) using spectral induced polarization(SIP) can provide important information for distinguishing ore from non-ore.Based on the deep research on the key technologies of SIP instruments,this study designs a new synchronous correlation detection technology of weak signals,and accordingly improves the prototype for practical purposes,simplifies the circuit structure,and improves the stability of phase measurement of the SIP instruments.The tests in mining areas show that the improved SIP instrument has lower cost,stronger anti-interference ability,higher practicability,and is suitable for large-scale promotion and application.

关 键 词：频谱激电法 同步相关检测 相位测量 恒流供电 抗干扰 

分 类 号：P631[天文地球—地质矿产勘探]