Design of level instrument with four launch electrodes based on current sensing field

Conduction current field can be widely used in many fields, such as underwater and underground communication, remote sensing, remote control, positioning and monitoring. In special occasions, it has incomparable advantages over other traditional communication mode. Therefore, the spread and application of the conduction current field have important scientific value and practical significance [1]. The paper has established the mathematical model of the gradienter with four launch electrodes and analysed the effects to the deflection direction and the angle of inclination of the gradienter due to different launch electrodes.