浅海底瞬变电磁探测系统关断沿影响因素研究  

Effect factors of turnoff time for shallow seafloor transient electromagnetic detecting system

作　　者：周逢道[1] 林君[1] 周国华[1] 刘长胜[1] 王艳[1] 

机构地区：[1]吉林大学地球信息探测仪器教育部重点实验室,吉林长春130026

出　　处：《电波科学学报》2006年第4期532-535,共4页Chinese Journal of Radio Science

基　　金：国家高新技术发展计划资助项目(2002AA615030)

摘　　要：运用电路理论对发射线圈进行了建模分析;讨论了采用多匝小线圈进行浅海底瞬变电磁探测时,发射电流关断沿时间与电流幅值和发射线圈匝数之间的关系;给出了在保证发射磁矩的前提下,合理确定发射电流幅值与发射线圈匝数以缩短发射电流关断沿的原则,并通过实验进行了验证。Transmit coils are modeled and analyzed by using circuit theory. For the transient electromagnetic exploration sysytem of shallow seafloor employing small transmit coils with many turns, the relation between the turnoff time and amplitude of transmitter current and the number of coil turns is discussed. In the precondition that the transmitter magnetic moment keeps unchange, the rule of determining the amplitude of transmitter current and coil turns to short turnoff time is presented in this paper. The experimential results testify the validity of the analysis conclusions .

关 键 词：瞬变电磁 发射机 关断时间 阶跃函数 

分 类 号：P742[天文地球—海洋科学]