基于液态金属的小型智能传感器电磁屏蔽原理与性能研究OA

In smart grids,sensors are essntial units for state monitoring and information acquisition,but their operating environment is often accompanied by strong electromagnetic interference,which can easily lead to signal distortion or even functional failure.To address this issue,this paper employs liquid metal combined with microfluidic technology to elucidate the shielding principle of liquid metal,designs a line-grid liquid metal shielding layer,and conducts parametric simulations and performs experimental validation.In the simulation part,the effects of grid width,spacing,and height on shielding performance are systematically analyzed,and the key design parameters of the shielding layer are identified.In the experimental part,a 10 kV electrostatic field and a 0.1～1 mT low-frequency magnetic field test platform are utilized,and the shielding performance against electric and magnetic interference is verified using strain(capacitive)and temperature(resistive)sensors.The results demonstrate that the line-grid liquid metal shielding layer can significantly enhance the anti-interference capability of sensors in strong electromagnetic environments,making it suitable for electromagnetic protection design of sensors and key equipment in power systems.