入射角度在杀伤元侵彻速度测量中引起的不确定度

杀伤元在明胶体内的侵彻速度衰减量是评价杀伤元杀伤效应的重要技术指标。借助高速摄影机可以对明胶体内杀伤元的侵彻过程进行拍摄,从而获得杀伤元的速度变化规律。当杀伤元的入射方向与垂直于明胶体表面的弹道线存在一定的角度时,该入射角度会对杀伤元在明胶体内侵彻距离所占有的像元数个数引起偏差,影响杀伤元速度衰减量的计算准确度。建立了杀伤元入射角度与弹道之间的数学模型,并在此基础上分析了不同的入射角度与杀伤元在明胶体内侵彻速度测量偏差之间的规律,提高了杀伤元杀伤效应评价的准确度。

The uncertainty caused by the incident angle in the killer penetration velocity measurement

The killer penetration velocity attenuation is an important technical indicator to evaluate the killing effect. The high-speed cameras shoot the killer penetration process in the gelatin to gain its velocity variation pattern. When the killer incident direction have a certain angle with the ballistic line which is perpendicular to the surface of gelatin, the incident angle will caused the error of pixel numbers occupied by the killer displacement. This error will have an impact in the measurement accuracy of killer velocity attenuation. This paper established a mathematical model between the incident angle and ballistic line. Then it analyzed the regular pattern between the different incident angles and the error of killer penetration velocity measurement to improve the accuracy of the evaluation of killing effect.