动目标选通探测的闪光抖动

在动目标选通探测的基础上,系统讨论了其闪光抖动产生的机理,定量分析闪光抖动的影响因素及其函数关系,并指出闪光抖动表现明显的成像条件和需要采取消抖处理的场合。设计了基于CCD外触发控制方式的硬件消抖电路,通过FPGA产生3路时序控制信号,分别为脉冲激光器触发信号、选通像增强器触发信号和CCD外触发信号,实现脉冲激光器、选通像增强器和CCD的工作时序同步,从而消除闪光抖动。仿真与实验均表明,消抖电路设计正确,时序控制合理,脉冲激光器、选通像增强器和CCD工作时序同步,很好地消除了闪光抖动。

Stroboscopic jitter of range-gated detection for moving target

The mechanism of stroboscopic jitter is illustrated comprehensively,based on the range-gated moving target detection.Influencing factors and functionrelationship of the stroboscopic jitter are analyzed quantitatively.In addition,the imaging conditions which produce stroboscopic jitter obviously and the occasions in which the jitter eliminating should be taken are both indicated.At last,a hardware jitter eliminating circuit which synchronizes pulse laser,gated intensifier and CCD is designed.The circuit was based on FPGA and can generate three timing signals which are the trigger signals of pulse laser,gated intensifier and CCD,respectively.Simulation and experiment both prove that the circuit is correct and the timing control is reasonable.Timing of pulse laser,gated intensifier and CCD synchronizes well,and the stroboscopic jitter is eliminated.