A Research on Effect of Probed Object Shape on Frequency Inflection Point (FIP) of Underwater Active Electrolocation System

Weakly electric fish can orient and navigate in dark environment by their active electrolocation system. Bio-inspired active electrolocation sensor has been investigated. In previous work, amplitude information-frequency characteristics (AIFC) of the active electrolocation system have been investigated. Detect frequency dead zone and frequency inflection point (FIP) of AIFC for the electrolocation system were found. And FIP have relevance to the material properties and geometric features of the probed object and the conductivity of surrounding water. But how to the shape of the probed object influence on FIP has not been deeply researched. In order to deeply study on how to the probed object shape influence on FIP of the active electrolocation system, three different materials probed object with two different shapes with similar geometric features of the probed object were selected for the active electrolocation system experiment. The following conclusions were obtained: for the similar size and the same material of the probed object, the shape of the probed object has significant effect on FIP of AIFC for the electrolocation system. So the shape of the probed object may affect the electric image. It may have a reference value for active electrolocation system designing.