一种损耗媒质中舰船交变电场测量的新方法

A New Method of Measuring the Alternating Electric Field of Ships in Lossy Medium

提出了基于电磁感应原理的损耗媒质中舰船交变电场的测量方法,即利用感应线圈,通过测量损耗媒质中舰船产生的电磁波的磁场分量,根据电磁波的电场、磁场幅度的数量关系推算得到相应的电场分量;仿真计算了线圈自感、检测电路的等效接入电阻对线圈输出电压的影响及线圈的频率响应,结果表明合理设计线圈及输出电压提取电路,可获得比传统电极对高的测量灵敏度;在实验室中,利用感应线圈测量了海水中一对电极产生的交变电场,结果表明该方法是可行的。

A new method to measure the alternating electric field of ships in lossy medium based on the principle of electromagnetic induction was put forward. The electric field component of the electromagnetic wave from ships was derived by the magnetic component measured with induction coil, The influence of the self-induction, the equivalent resistance of the outer testing circuit on the output voltage of the induction coil and the frequency response were calculated. The calculated results show that the higher sensitivity than that of traditional eledrode pair will be reached so long as the coil and the testing circuit are designed reasonably. At last, the electric field of a pair of electrode in seawater was measured＇in laboratory, and the result verified the validity of this method.