Research on Technique of Pulse Laser Fuze Anti- Electromagnetic Interference

Due to the serious electromagnetic interference problem inner fuze arisen from volume constraints under the process of pulse laser fuze applied in medium-small caliber conventional ammunition, this thesis has analyzed the necessity of adopting anti-interference measures internally. Dual shield which inhibits radiated interference and multiples filtering technique which inhibits conducted interference composed by linear impedance stabilization circuit, buffer network, CM-DM synthesized choke, are proposed by analyzing EMI mechanism of transmitter and receiving module. Eventually, simulations and experiments are carried on. Simulation results show that steel shield which with the thickness of 1.55×10^-3m has good shielding effect to RI, Experiment results prove that the peak value of receiving module interference signal reduces to 70mV, which is only a fortieth of original noise. These strategies which greatly reduce internal EMI of pulse laser fuze are feasible and effective.