Research On The Development Of Detection Experimental Devices And Positioning Algorithm Of Underwater Weak Electric Field Target

Traditional underwater detection and positioning technology has many advantages.For example,underwater acoustic detection can achieve long-distance detection of targets,and underwater light detection can achieve underwater target imaging.However,there are also some disadvantages.For example,the effect of underwater acoustic detection will decrease when facing the complex environmental noise,and the water environment will also cause a multi-way effect to cause detection errors;New underwater detection methods need to be studied as supplement.This article studies the principles of the weak electrical fish perceptions,studied the detection characteristics of the target of underwater and weak electric field,designed the underwater weak electric field detection experimental device,and verified the feasibility of underwater target weak electric field detection experiment system.Research includes the following points:First of all,establish a physical model of underwater quasi-static electric field based on the theory of classic electromagnetic fields,and analyze the potential in the plane theoretically with the puppet model;then simplify the Rasnow model to build the underwater active electric field positioning model,establishing a mathematical relationship between the target position and receiving voltage disturbance.Secondly,use COMSOL to simulate the underwater active electric field detection environment,and observe the voltage receiving situation and change trend of receiving electrodes in different locations through simulation results to provide reference data for the design of the parameter design of the positioning detection system;in the simulation environment Voltage motion simulation research on target objects of different materials and different sizes is verified with system experimental results.At the same time,software simulation results provide data support for algorithm research.Thirdly,the active electric field positioning model was combined with Extended Kalman Filter(EKF),and the simulation data was used to study under the electric dipole model and the uniform electric field model.The results show that the moving object positioning detection can be achieved in both cases,and the effect of the uniform is slightly better than the electric dipole;Unscented Kalman Filter(UKF)is applied to the underwater electric field positioning detection,which proves the feasibility of this problem.Compare the algorithm accuracy,verify that UKF is more suitable for solving the problem of underwater active electric field positioning problems,and applied the experimental collection data to the algorithm,proving that the practicality of the algorithms in solving the problem.Finally,an underwater active electric field positioning detection system platform was designed,and the object positioning detection test was completed based on the system.This system improves the positioning capacity of active electric field objects,improves the integrity of the underwater active electric field positioning detection system,and verifies the feasibility of underwater active electric field positioning detection technology.