Patent ID: 9329296
Filing Date: 2016-05-03
CPC Classification: G01N,G01V,Y02A

Claim Text:
1. An underwater detector comprising: two direct current electrodes installed underwater and connected to a direct current power supply; a plurality of measurement electrodes installed in a plurality of columns of two or more columns underwater; and a control and measurement module for measuring voltages of the plurality of measurement electrodes, wherein the plurality of measurement electrodes each include an electrode control module, the electrode control module includes a first switch, a second switch, a controlling unit, and a communication unit enabling communication with the control and measurement module, the electrode control module has a first voltage measurement line and a second voltage measurement line which are connected thereto, a connection state between the measurement electrodes and the first voltage measurement line is changed depending on a state of the first switch, a connection state between the measurement electrodes and the second voltage measurement line is changed depending on a state of the second switch, the controlling unit controls the states of the first switch and the second switch, and the voltages of the measurement electrodes are due to an electric field that occurs by a voltage of the direct current electrode.