Abstract:

 In order to prevent the strong and weak electromagnetic signal interference and ensure the safe and reliable operation of weak current system in electronically controlled pry, the electromagnetic shielding performance of 2.5-mm-diameter wire mesh shielding test box under different electromagnetic radiation distances and frequencies was studied using experimental methods. The experimental results show that the shielding effectiveness of wire mesh shielding test box decreases gradually with the increase of distance but the frequency of electromagnetic wave has less impact on the shielding effectiveness of wire mesh shielding test box when the frequency of electromagnetic wave is 900～2400 MHz. When the frequency of electromagnetic wave is less than 900 MHz, the electromagnetic shielding effectiveness of wire mesh shielding test box increases with the frequency of electromagnetic wave. The electromagnetic shielding effectiveness of wire mesh shielding test box is greatly affected by the electromagnetic radiation distance, and increases as the radiation distance decreases. The higher the frequency of electromagnetic wave is, the better the shielding performance of wire mesh is. The research results provide experimental basis for the shielding design of strong/weak electromagnetic signals in electronically controlled pry with wire mesh.

Key words: electronically controlled pry, signal interference, shielding effectiveness, wire mesh