A special device with arranged steel electrodes and controlled interferential electric field in water pool was designed.

设计了室内模拟装置：在水池内放置排列的钢电极和可控制干扰电场。

youdao

The predicting field water level can be compared with the measured real time field water level and the pump and gate action can be controlled in the system.

该系统可把预设农田水位与测得的农田实时水位进行比较，并据此控制闸门和水泵的动作。

youdao

Lunn said the device puts a controlled electronic field into the water, which dissipates quickly, so there is no permanent damage to the shark.

CNN: Divers embrace anti-shark device