海底大地电磁数据采集器  

COLLECTOR FOR SEAFLOOR MAGNETOTELLURIC DATA

作　　者：邓明[1] 魏文博[1] 谭捍东[1] 金胜[1] 董浩斌[1] 邓靖武[1] 

机构地区：[1]中国地质大学地球物理与信息技术学院,北京100083

出　　处：《地球物理学报》2003年第2期217-223,共7页Chinese Journal of Geophysics

基　　金：国家"863"计划研究项目 (82 0 - 0 3 - 0 4 );(2 0 0 2AA61 50 2 0 ) .

摘　　要：进行海底大地电磁数据采集 ,需借助于专用的水下探测设备 .虽然大地电磁测深法无论是仪器或是测量手段在陆地上的应用已较为成熟 ,但把该方法移植到海洋中 ,还需解决一些与海洋探测有关的工程技术问题 .主要包括 :水下电场信号的提取 ,海底环境的监测 ,仪器在非实时监控运行中的纠错对策以及测量部件的密封承压等等 .在研制海底大地电磁数据采集器的过程中 ,采用先进的材料工艺 ,高精度的电子线路 ,可靠的软件编程以及牢固的器件安装结构 ,有效地解决了上述技术问题 .用所研制的仪器首次在我国海域进行了探测试验 .Special prospecting instruments is used when the marine magnetotelluric prospecting is carried out. Both instruments and methods of the magnetotelluric prospecting on land are mature. When these methods are transplanted to the ocean, some engineering techniques about measurement on the seafloor must be solved. They include the picking up of the electric field signal, the monitoring of the environment on the seafloor, the error correction of the instrument in the non-real time monitor status, the pressurization and seal of the measurement unit, etc. In the development of the collector for seafloor magnetotelluric data, advanced technology about material, high precision electrocircuit, the reliable method of developing software and the firm structure of the instruments are use to solve the techniques effectively. The instruments were used to measure the magnetotelluric data firstly in Chinese sea area.

关 键 词：大地电磁 海洋探测 数据采集 GPS同步 密封承压 

分 类 号：P631[天文地球—地质矿产勘探]