基于激光光幕的高速小目标信噪比研究

Research on Signal to Noise Ratio of High⁃speed Small Targets Based on Laser Screen

通过对目标过靶时光电探测器与运算放大器所产生信号和噪声的研究,推导出信噪比与激光出射功率、原向反射屏逆反射效率的理论关系;进行多组实验验证激光功率、反射效率对信号信噪比的影响。结果表明所设计的激光光幕系统,通过适当提高激光功率、采用逆反射效率高的反射屏,可以有效提升高速小目标过靶信号的信噪比。

By studying the signals and noise generated by the photoelectric detector and operational amplifier when the target passed through,the theoretical relationship between the signal-to-noise ratio and the laser output power was derived,as well as the retroreflection efficiency of the original reflection screen.Multiple sets of experiments were conducted to verify the influence of laser power and reflection efficiency on signal-to-noise ratio.The results indicated that,by appropriately increasing laser power and using a reflective screen with high reverse reflection efficiency,the signal-to-noise ratio of high-speed small target passing signals could be effectively improved in the designed laser screen system.