Detector installed in the crane boom end, at the top of the metal ball as a detecting probe, can detect electric field around the wire.

检测器安装在起重机臂端，其上端的金属球作为检测探头，可以检测电线周围的电场。

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This paper analyses the effect of the probe on the measurements of coupling function, and verifies the formulation of coupling function for different incident electric field directions.

分析了测量探头对耦合函数测量的影响，验证了耦合函数随入射电场方向变化的公式。

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Then the choosing method of the probe of electric field and the designing of the amplify and A/D circuit is put forward. The interface of communication is also put forward in this paper.

然后分别从水下电场探头的选择，电场测量放大电路与A/D转换电路的设计，通讯接口设计等方面阐述了该仪器的研制思路。

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