小型化是当前脉冲激光近炸引信的发展趋势。小型化不仅需要考虑结构过载的影响, 同时由于结构小型化而引发空间电磁干扰问题不可忽略。基于小型化背景, 建立脉冲激光发射系统理论模型, 利用Comsol软件仿真发射系统瞬时放电周边辐射。分析了发射系统脉冲大电流对探测系统的电磁辐射干扰, 同时基于电磁屏蔽机理提出抗电磁辐射干扰措施。实验与仿真结果表明, 激光发射系统瞬时放电会产生极大的电磁辐射干扰, 采用45号钢组合屏蔽机制, 能够有效的抑制电磁干扰。

The miniaturization is the current development trend of pulsed laser proximity fuze. In addition to considering the impact of structural overload, the problem of space electromagnetic interference caused by the miniaturization of the structure can not be ignored. Based on the miniaturization background, a theoretical model of pulsed laser emission system is established, and the instantaneous discharge peripheral radiation is simulated by Comsol software. Analyzing the electromagnetic radiation interference on the detection system caused by the pulse current of the emission system, it proposes the anti-electromagnetic radiation interference measures based on the electromagnetic shielding mechanism. The experimental and simulation results show that the instantaneous discharge of the laser emission system will produce great electromagnetic radiation interference effectively suppressed by the 45 steel combined shielding mechanism.