半无限大海域中电偶极子源的定位方法

Localization method of electric dipole source in semi-infinite sea area

利用矢量运算及镜像法推导了半无限大空间中电偶极子对海水中场点传递矩阵的表达式,定义了表征电场强度与电偶极矩之间线性变换关系的传递矩阵,并分析了传递矩阵的可逆性.据此提出了通过传递矩阵求逆得到半无限大海域中电偶极子场源参数的定位方法,并通过仿真算例验证了定位方法的可行性.结果表明:基于该方法利用半无限大海域中两个测点的电场强度可以对海水中的单电偶极子源进行准确定位,利用四个测点的电场强度可以同时定位海水中的双电偶极子源;该方法计算量小、计算速度快,经过改造还可以用于未知分界面的定位.

Using vector operation and mirror image method,the expression of the transfer matrix of the electric dipole in the semi-infinite space to the field point in seawater was derived,the transfer matrix characterizing the linear transformation relationship between the electric field intensity and the electric dipole moment was defined,and the invertibility of the transfer matrix was analyzed.Based on the above,a method for locating the source parameters of the electric dipole in the semi-infinite sea area by inversion of the transfer matrix was proposed,and a simulation example verified the feasibility of the positioning method.Results show that based on the proposed method,the electric field strength of two measuring points in the semi-infinite sea area can be used to accurately locate the single electric dipole source in seawater,and the electric field strength of four measuring points can simultaneously locate the two electric dipole sources in the seawater.This method has a small amount of calculation with high calculation speed,and can also be used to locate unknown interface after modification.