In order to provide high precision and stable optical signal for the pulsed laser ranging device of the fire control system, the test distance performance under laboratory conditions was completed. ARM9+FPGA embedded system was used as the control platform;coarse timing module and precision timing module of the FPGA were kept in serial work;the pulse laser Time-of-flight Distance of the fire control system was realized. The range-gate control circuit for coarse timing of the last cycle in precision timing module was adopted by using vernier principle , so the high precision timing can be realized. The laser echo simulator received the triggering signal of fire control system,the laser echo simulation within 24.6km distance can be returned on time,the accuracy can reach 0.25m.%为了给武器火控系统的脉冲激光测距设备提供高精度和稳定的光激励信号,以便完成实验室条件下的距离性能测试实验,采用ARM9+FPGA嵌入式系统作为控制平台.控制平台的粗定时和精定时两个模块串行工作,精定时模块使用距离门控电路对粗定时的最后一个周期运用游标原理进行细分,实现了武器火控系统高精度的脉冲激光飞行模拟.激光回波模拟器接收到火控系统的触发信号后,能够在规定的时间内返回24.6km距离内的激光回波模拟信号,系统精度可达0.25m.
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