采用针孔照相法测量炮弹飞行姿态

测量炮弹的飞行姿态,特别是距炮口200米内的飞行姿态,是外弹道实验最重要的内容之一,因为飞行姿态与飞行稳定性及射击密集度的研究密切相关。当前,测量飞行姿态的方法有攻角纸靶、弹道靶道及高速摄影等。攻角纸靶简单、经济,但它对弹丸的运动有干扰,精度较低;弹道靶道能得到精确的飞行姿态数据,但必须建立一系列火花闪光照相站,耗费巨大;弹道同步照相及高速分幅照相也可测量姿态,但因精度较低,化费大,实际上没有得到广泛应用。 用在弹头上安装针孔照相机的方法,并借助一个频闪平行光源,能够直接记录攻角——时间变化曲线。此法比较简单、经济、精确,其缺点是需要回收射击的炮弹。

MEASUREMENT OF FLIGHT ATTITUDE OF A PROJECTILE BY PINHOLE CAMERA

Measurement of flight attitude of a projectile, especially in the trajectory within 200m from the gun muggle, is one of the great important exterior ballistic tests, Since it is closely connected with the research of flight stability and fire dispersion. The methods of measuring attitude at present are yaw cards, ballistic range and high speed photography, etc, Yaw card is simple and economical, but it interferes movement of projectile. Its accuracy is low; Ballitic Range can get accurate data, but a series spark flash photograph stations have to be set up with a huge investment. Ballitic syncho camera and high speed framecamera can also measure attitude, but the accuracy is lower and expend vast, so they haven't being utilized extensively in fact.The method of pinhole camera which is set up at the cone of a projectile, can record the yaw-time curve directly by a frequency-flash parallel light. This method is simple, economical and accurate, Its defect is of recovering the fired projectile.