天然音频电场选频仪设计与应用  

Design and application of audio frequency natural electric field instrument

作　　者：程辉[1,2] 白宜诚[3] 

机构地区：[1]湖南科技大学,湘潭411201 [2]中国科学院地质与地球物理研究所,北京100029 [3]中南大学,长沙410083

出　　处：《地球物理学进展》2014年第6期2874-2879,共6页Progress in Geophysics

基　　金：湖南省自然科学基金项目(13JJ3088);湖南省自然科学基金湘潭市联合基金项目(12JJ9008)联合资助;湖南省科技厅项目(2012TP4023-6)

摘　　要：根据天然音频大地电磁场理论设计选频接收多个频点大地电场音频电场信号,用来定性了解地下地质体电性结构的观测方案.设计中采用微弱信号检测技术,对微弱的音频大地电场信号进行放大、滤波,选频检波、积分后读取音频大地电场信号.仪器可观测8Hz,16Hz,32Hz,64Hz,128Hz,256Hz,512Hz,1024Hz等8个频率的电场信号,在硬件设计与软件开发中利用多种可靠的技术,使设置抗干扰能力和系统的稳定性得到了加强.通过野外工作实例的对比分析,天然场选频仪能够反映地下一定深度范围内的地质信息,可用于地质矿产、工程物探及水资源的快速普查.It is an observing scheme that frequency-selecting apparatus on the natural field,invented theoretically on audio frequency electromagnetism on earth,receives electric signals selectively from some frequency spots for people to qualitatively understand electric structure of underground geological targets.The apparatus use of checking technology for weak signals,magnifies and filters the weak signals,such as 8 Hz,16 Hz,32 Hz,64 Hz,128 Hz,256 Hz,512 Hz,and 1024 Hz,and calculates audio frequency electric signals on earth by integral.Contrastive analysis of practical cases shows that such an apparatus is excellent in providing geological information at a certain depth.It is applicable to the survey of mineral and the water resources.

关 键 词：音频天然大地电场 选频接收 大地电磁测深 观测系统 

分 类 号：P631[天文地球—地质矿产勘探]