激光引信可调高频窄脉冲驱动电源设计

Design of High-frequency and Narrow Pulsed Driver Power of Laser Fuze

针对激光近炸引信周向探测系统中高发射频率和高精度的难点问题,设计了激光引信可调高频窄脉冲驱动电源.通过对激光引信周向探测系统的介绍以及激光驱动电源放电回路建模与理论分析,应用FPGA中PLL锁相环及相移倍频法提高计时时钟频率,实现可调高频脉冲触发信号,并经过高速整形电路与衰减电路控制信号幅值.运用场效应晶体管驱动器加速MOSFET管的导通,在电路中产生瞬时大电流.加工制作PCB板进行实验验证,实验结果表明:脉冲激光发射频率在0~30kHz可调,脉冲上升沿时间为10ns,脉宽20~40ns可调,激光峰值功率达到69.8 W.本设计可为激光近炸引信脉冲驱动电源设计提供参考.

Aiming at the difficult problem of high emission frequency and high range precision in the circumferential detection system of the laser proximity fuze,laser fuze drive power supply was designed to adjust the high frequency and narrow pulse.Through the introduction of the laser fuze detection system,the laser discharge circuit power modeling and theoretical analysis,method of PLL and phase shift frequency doubling of FPGA were proposed to improve the timing clock.The method can realize adjustable high frequency pulse trigger signal,and control the amplitude through high speed shaping circuit and attenuation circuit signal.The conduction of the MOSFET tube was accelerated by using the field effect transistor driver.Then the instantaneous high current was generated in the circuit.Processing and production of PCB board for experimental verification was finished.The experimental results show that:the frequency of pulse laser emission in the 0~30kHz can be adjusted,the pulse rise time is 10 ns,pulse width can be adjustable from 20 ns to 40 ns,the laser peak power is 69.8 W.The design is provided for the design of the pulse drive power supply of the laser proximity fuze.