高原环境下天幕靶探测电路设计

摘要

针对现有天幕靶在高原环境下天空背景主要为蓝光引起的探测灵敏度急剧下降的问题,提出了双光幕探测方案,设计了过幕信号增强电路和程控放大控制电路.采用两套独立的光电转换模块在空间形成重合的探测光幕.当弹丸穿过重合光幕时,两套模块各自独立输出弹丸过靶信号,经信号增强电路进行处理后,提高信噪比、输出有效的弹丸过幕信号.设计的电路经在双镜头天幕靶上使用验证,电路工作可靠,提高了天幕靶的探测灵敏度.%In order to solve the problem that the sensitivity of sky screen is sharply decent in plateau air background mainly consist of blue light,and dual-shot sky screen solution is proposed.Design of signal enhancement circuit and program control amplifier circuit.Two sets of independent conversion modules of photoelectric detector are used to form two coincident probe screens in space.When the projectile passes through the coincident screens,two modules would output the signals independently,and the signals would carry out the synthesis by signal processing circuit in the behind,and increase signal to noise ratio,which would output the projectile flight signal effectively at last.The design of circuit has been used in dual-shot sky screen,improved the sensitivity of sky screen with reliable performance.