Finite Element Simulate Of Underwater Active Electrolocation System

Weakly electric fish use their electric organ discharging around the establishment and receiving the changed field information. It is derived the technology of active electrolocation by bionic scholars. In order to better study the technology research group set up the active electronic field experimental system, on which we had done a lot of experiments, including research of localization of objects underwater and liquids pipeline defect detection. In this paper, Ansoft Maxwell was used to simulation calculation based on these experiments and results. The calculation results after treatment compared with the experimental results, which verify the technology of active electrolocation can be used for localization of objects underwater and liquids pipeline defect detection. The main contents of this paper are as follows:1.It is established that the 2D and 3D simulation model of the research of object materials characteristic underwater. A group of specific frequency excitation is selected to add to the located insulating materials or metal materials cylindrical for 2D and 3D simulation calculation. The localization curve of insulating material is convex shape with a hump, which position is same to the center of the measured object. Neither simulation result nor experiments result don’t appear turning frequency phenomenon.The metal materials localization curve is concave shape with a valley, which turn up the center position of the measured object. The simulation results do not appear but experiments emerge the turning frequency phenomenon.2.There are different models established of the leak and blockage of different materials pipeline, in which is fresh water and external environment of water or soil, for simulation calculation. No matter what the external environment, the curves of leak of metal pipes shown the uniform shape as well as blockage of metal pipes, leak and blockage of insulated pipes. A kind of curves has the maximum characteristic signal at the same position. The signal will be based on this feature which can accurately locate the position of the pipe defects.3.The models of leak and blockage of pipeline are established appropriately,selecting common liquid materials in the pipe, the external environment of air or water or soil, add the proper excitation source to calculation. According to the position curve,the signal of the maximum of the signal can be found in the position of the pipe defect.4.Liquid delivery pipes and pipe defect conductivity type determines the location curve trend. The magnitude of the excitation voltage determines the size of the reception.The frequency determines the size of the incentive success defect detection pipeline.When the conductivity is large, the external environment effecting electric field weakly.When the conductivity is small, pipeline external environment of air, water, soil effecting electric field gradually increased. Pipe blockage has stronger anti-jamming capability against the external environment than the pipeline leak.High-frequency excitation is needed when there is great impact on electric field. The overall consideration is needed to analysis electric field information. Simulation results provide the data basis for later study of coupling and decoupling of active electric field.By comparing the experimental results and the simulation treated results, we can verify that the technology of active electrolocation can located the position of underwater objects and detect various liquid pipelines’ defect, locating the position of defect. Simulations lay a foundation for more in-depth research of the technology and application in engineering.