A method of judging electromagnetic interference propagating way based on Multisim circuit simulation

摘要

According to the problem of electromagnetic incompatibility between transmitting system and receiving system in active detection equipment, the research on propagating way of electromagnetic interference is taken as the breakthrough point. Aiming to eliminate the impact of conducted interference on radiated interference in practical tests, a method of judging electromagnetic interference propagating way based on Multisim circuit simulation is put forward. Firstly, the simulation platform of signal processing module in receiving system is set up in Multisim. When many signals are input into simulation platform and real system, the comparison of judging results indicates the correctness and feasibility of simulation platform. Secondly, when transmitting system is working, the interference signal is sampled by signal acquisition card, and is loaded to the simulation platform as signal source by LabVIEW. The simulation result shows that transmitting system can interfere with receiving system by radiated coupling.