摘要
随着我国经济的迅速发展,浅部矿产资源的消耗不断加剧,我国地质勘探工作不断向深部、复杂区域推进,深部探测的需求也与日俱增,对适用于超宽频分布式国产大地电磁采集站的需求日益迫切.本文设计研制了用于大地电磁探测的国产化超宽频分布式采集站DMT-V1,并结合LORA自主网与4G组网通讯技术实现了数据远程实时监控与远程数据下载.研制的采集站包含2个电场通道和3个磁场通道;支持低噪声磁通门传感器、长周期感应式磁传感器,可进行磁传感器现场标定;支持MT(大地电磁)及LMT(超长周期大地电磁)法.其中AD转换器采用了32位高精度ADC国产芯片CX1282,并搭配低功耗硬件处理器,在ARM间断工作模式下,采集站的功耗可小于1W@12VDC.对本系统进行了野外探测试验,经与国外先进仪器对比试验,表明了DMT-V1采集站的性能指标总体上达到了国际先进水平,并对DMT-V1采集站在不同地区分别进行了野外应用测试,其探测频率可达100000 s,支持MT、LMT方法,具有高稳定性、低功耗、高精度、重量轻、便携等特点,应用范围涵盖浅层矿产勘查、深层超深层油气勘探和地壳-上地幔电性结构调查.
With the rapid development of China's economy,the consumption of shallow mineral resources continues to intensify,and the geological exploration work in China continues to advance to deep and complex areas,the exploration of deep geological resources in our country is also confronted with multiple challenges,such as detection depth,anti-interference ability,and measurement accuracy.The demand for deep exploration is also increasing,and the demand for the domestic distributed magnetotelluric acquisition station is becoming increasingly urgent.In this paper,a domestic ultra-wideband distributed acquisition station DMT-V1 for magnetotelluric detection is designed and developed.Combined with LORA autonomous network and 4G networking communication technology,remote real-time data monitoring and remote data download are realized.The developed acquisition station consists of 2 electric field channels and 3 magnetic field channels,and supports low noise fluxgate sensor,long period induction magnetic sensor,magnetic sensor field calibration;MT(Magnetotelluric)and LMT(ultra-long period Magnetotelluric)methods are supported.The AD converter uses a 32-bit high-precision ADC chip CX1282,and is equipped with a low-power hardware processor.Under ARM intermittent operation mode,the power consumption of the acquisition station can be less than 1W@12VDC.Field detection experiments were carried out on this system.Comparative tests with advanced foreign instruments showed that the performance indicators of the DMT-V1 acquisition station generally reached the international advanced level.Field application tests of the DMT-V1 acquisition station were conducted respectively in different regions,and its detection frequency could reach up to 100000 seconds,supports MT and LMT methods,and has the characteristics of high stability,low power consumption,high precision,light weight and portability.The application scope of this equipment covers shallow mineral exploration,deep and ultra-deep oil and gas exploration,and the investigation of the electrical structure of the crust and upper mantle.
作者
刘长胜
王庭洁
陈健
LIU ChangSheng;WANG TingJie;CHEN Jian(College of Instrument Science and Electrical Engineering,Jilin University,Changchun 130026,China;Key Laboratory of Geophysical Exploration Equipment(Jilin University),Ministry of Education,Changchun 130026,China)
出处
《地球物理学进展》
北大核心
2025年第5期2286-2300,共15页
Progress in Geophysics
基金
国家重点研发课题“地面天然源分布式深地结构大地电磁探测技术研究与装备研制”(2023YFB3905002)资助。
关键词
超宽频
分布式
大地电磁
采集站
Ultra-wide band
Distributed
Magnetotelluric
Acquisition station
