电磁勘探中工频噪声采集技术研究  

Research on power frequency noise acquisition technology in electromagnetic exploration

作　　者：程辉 傅崧原 李帝铨[2] 廖秀英 付国红 CHENG Hui;FU SongYuan;LI DiQuan;LIAO XiuYing;FU GuoHong(Engineering Research Center of Advanced Mining Equipment Ministry of Education of Hunan University of Science and Technology,Xiangtan 411201,China;School of Geosciences and Info-Physics,Central South University,Changsha 410083,China)

机构地区：[1]湖南科技大学先进矿山装备教育部工程研究中心,湘潭411201 [2]中南大学地球科学与信息物理学院,长沙410083

出　　处：《地球物理学进展》2021年第6期2667-2674,共8页Progress in Geophysics

基　　金：国家重点研发计划项目(2018YFC0603900);国家自然科学基金(42074219,42174080);湖南省自然科学基金面上项目(2021JJ30241);广西自然科学基金创新研究团队项目(GXNSFGA380004);湖南省研究生科研创新项目(CX2018B663)联合资助。

摘　　要：电磁法是对地探测的支柱技术,随着经济和社会发展,电磁干扰日益严重,极大地的影响了对地探测效果,亟需研发工频电磁干扰快速测试分析技术和仪器,为电磁探测测点选择提供依据;本文开发了一套环境电磁噪声测量装置,可实时记录电磁场总场强度与工频基波及其二次、三次谐波振幅强度,实验表明6套实验样机一致性数据Pearson相关系数达0.9664以上,观测时间大于24 h,为电磁勘探方法选择、测网布置以及观测数据的可信度提供基础资料;可服务于电磁探测测点中的电磁噪声的评估.Electromagnetic method is the pillar technology of earth detection, with the development of economy and society, electromagnetic interference is becoming more and more serious, which greatly affects the detection effect.It is urgent to develop the power frequency electromagnetic interference rapid analysis technology and instrument, which provide the basis for the selection of electromagnetic detection points.In this paper, a set of environmental electromagnetic noise measurement device is developed, which can record the electromagnetic field intensity, power frequency fundamental wave, second and third harmonic amplitude intensity in real time.The experimental results show that the Pearson correlation coefficient of the six sets of experimental prototypes is above 0.9664, and the observation time is more than 24 hours.It can provide basic data for the selection of electromagnetic exploration method, the layout of survey network and the credibility of observation data. The instrument can serve for the evaluation of electromagnetic noise in electromagnetic detection points.

关 键 词：电磁法勘探 背景噪声 信号采集 

分 类 号：P631[天文地球—地质矿产勘探]