曳光弹速度光幕靶测量算法研究

Velocity Measurement Algorithm of Light Tracers Based on the Light Screens

针对常规光幕靶不能测试曳光弹速度的问题,提出了一种速度测量算法.该方法配合光电互补传感器的光幕靶与数据采集系统,通过对光幕靶输出的曳光和弹体信号进行特征值分析,采用对比和广义相关算法精确计算出弹丸的飞行时间.实弹试验表明,设计的算法可以实现曳光弹测速,也可以实现常规弹测速,在曳光不稳定时也能够测出速度,并能识别有无曳光.测量精度满足靶场对曳光弹测速要求.

A velocity measurement algorithm for the light screens is put forward to solve the problem that the conventional light screens can not measure the velocity of light tracers.The method is based on the novel light screen of the photo-electricity complementary sensor and the high-speed data acquisition card.And the light screens will output the bullet-shape signals and tracer-light signals when the projectile flies across the sensors of the light screen.After the analysis of the characteristics of the signals,the flight time of the projectile is accurately calculated by the contrast and the generalized mutuality algorithm.The typical projectile and the light tracer,even if its trace light is unstable can be measured by the algorithm,which can recognize,whether the projectile has trace light or not.The test results show that the measuring precision meets the requirement of the velocity measurement in the test range.