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.
关键词
电磁耦合/磁场增益/磁传感器/COMSOL仿真
Key words
electromagnetic coupling/magnetic field gain/magnetic sensor/COMSOL simulation
维普
万方数据