| 海底有限长极低频线电流在海面附近产生的场 |
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| 引用本文： | 陈宇,王洪发,彭怀云,韩逍菲.海底有限长极低频线电流在海面附近产生的场[J].电波科学学报,2016,31(2):247-252. |
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| 作者姓名： | 陈宇 王洪发 彭怀云 韩逍菲 |
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| 作者单位： | 1.中国电波传播研究所 电波环境特性及模化技术重点实验室, 青岛 266107 |
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| 摘 要： | 针对海缆故障点的检测与定位, 将海缆看作位于海床以下的有限长线电流源, 从麦克斯韦方程和边界条件出发, 推导了其在大气层-海水层-岩层三层平面分层介质下的电磁场的积分表达式, 采用数值积分对海缆在不同观测点位置产生的磁场进行了分析.由断点附近海面上磁场分布的特征可以估计出海缆的走向及断点的位置.
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| 关 键 词： | 海缆 检测与定位 有限长线电流源 |
| 收稿时间： | 2015-04-17 |
The field excited round the surface of the sea by ELF finite-length linear electricity source on the seabed |
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| Affiliation: | 1.National Key Laboratory of Electromagnetic Enviroment, China Research Institute of Radiowave Propagation, Qingdao 266107, China2.China Research Institute of Radiowave Propagation, Qingdao 266107, China3.School of Science, Xidian University, Xi'an 710071, China |
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| Abstract: | Based on the detection and orientation of the broken point of the cable buried in the seabed, the cable is considered as finite-length linear electricity source.From the Maxwell function and boundary condition, the integral expressions of the electromagnetic field in the planar layered medium including the atmosphere, the seawater layer and the rock layer are derived.The field excited at different observation points by the cable are analyzed by numerical integral.The direction of the cable and the position of the broken point can be estimated via the characteristics of the magnetic field around the broken point on the sea. |
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| Keywords: | cable buried in the seabed detection and orientation finite-length linear electricity source |
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