Research On Sensor Improvement And Underwater Detection Characteristics Based On Underwater Active Electric Field Technology

In recent years,major countries have stepped up the exploration and exploitation of marine resources.The current method of obtaining marine data is expensive and very limited.The underwater active electric field detection method based on the research of weak electric fish is an emerging underwater detection method with great research potential.This method is expected to solve the technical bottleneck in current underwater detection methods.The underwater active electric field detection technology simulates the weak electric fish itself to establish a stable electric field under water,while its own organ also receives the electric field information emitted by itself,and analyzes the changes of the surrounding environment by sensing the change of its own transmitting electric field,and finally realizes the surrounding Environmental identification,predation,escape,etc.The research focus of this paper is to conduct related research on sensors in underwater active detection,and use sensors to analyze the signal strength and the influence of complex impedance objects on the detection process.Firstly,on the underwater active electric field detection experimental platform simulating the underwater weak electric fish detection principle,by comparing the influence of different electrode materials on the detection results,an electrode material suitable for underwater detection is found.Then,the various characteristics of the sheet electrode in the detection are detected,and the influence of the emitter electrode plates of different sizes and different distances on the detection is analyzed,and the electrode plate suitable for the experimental environment is found.Then,based on the above experimental results,the influence of the detected signal intensity on the detection result of the sensor during the detection process is studied,including the experiment of the object turning frequency and the detection distance of the signal;then the complex impedance object is used as the detected object to analyze and compare the complex impedance.The difference between an object and a metal object in the detection process.Through relevant experiments,this paper draws the following relevant conclusions:1.After underwater data acquisition of electrodes of different materials,it is found that zinc material and graphite material are suitable as sensor emitter electrode materials,and KCL solution electrode as the receiving electrode can greatly reduce zero drift.2.For the plate electrode,in the laboratory detection experimental environment,the side length of the emitter plate is 5 cm,and the spacing between the emitter plates is12 cm,which has a good detection effect.3.During the underwater electric field detection process,the signal intensity of the electric field has little effect on the turning frequency,and can be ignored within the error range.When an electric field is established underwater,the underwater electric field is scanned and found under water.When there is a metal object,this effect can be used to detect or locate the object.4.When a complex impedance object is encountered during the detection process,the object with strong characteristics during the detection process has a great influence on the detection of the turning frequency.