Magnetic Induction Strength Gain Method Based on Electromagnetic Coupling
In the field of underwater metal detection,the influence of environmental noise makes it difficult for magnetic sen-sors to receive weak magnetic signals.To further improve the ability of magnetic sensor to receive weak magnetic signals,based on the characteristics of electromagnetic coupling,two coils whose area,number of turns and inductance meet certain conditions were connected in series as the pre-magnetic field gain module of magnetic sensor.Firstly,an equivalent circuit model was established for the external magnetic field,the reception coil,and the enhancement coil to analyze the overall system's field strength gain and derive the final gain expression.Then,the system gain model was simulated and verified using COMSOL software.Finally,the de-tection coil and reinforcement coil were wound to verify the experiment.Results demonstrate that the proposed electromagnetic coupling enhancement method effectively amplifies the magnetic field intensity of the received signal,thus improving the ability of magnetic sensor to receive weak magnetic signals.
electromagnetic couplingmagnetic field gainmagnetic sensorCOMSOL simulation
万方数据
维普
