【摘要】 分析探测海底天然大地电磁场的技术特点 ,提出海底大地电磁仪的设计方案。仪器研制过程中主要解决的问题有 :海底微弱电磁信号的检测 ,海底测网的同步方式 ,海底环境状态监测 ,电路器件的承压密封以及整套仪器系统的下沉与上浮功能的实现等。还介绍了新研制的仪器系统在海洋试验的情况 ,列举了我国首次海底大地电磁探测试验的部分测量结果 ,经对被测结果的初步分析 ,证实了本项技术的有效性和实用性。更多还原

【Abstract】 Characteristics of the natural magnetotelluric field detection on the seafloor are analyzed and the design scheme of the marine magnetotelluric instrument is given.During the research, some problems are solved: detection of the faint magnetotelluric field on the seafloor,the scheme of synchronization among the survey grid,the environment monitoring,the pressure bearing and seal of the instrument and the realization of the sinking and floating function, etc.Then,the experiments with the developed instrument on the sea are introduced.Some of the results acquired in the marine magnetotelluric prospecting experiment the first time in China are brought out.The validity and practicality of the technique has been testified by analyzed the data acquired.更多还原