双天幕靶交汇测量弹丸飞行参数原理

The principle for measuring motion parameters of projectiles using two sky screens in vertical intersection manner

提出了两种新型天幕靶的设计原理。采用敏感面较大的真空光电管、多狭缝光阑板以及标准光学照相镜头作为基本部件,将狭缝光阑板设计成"N"字和"三"字形,就可以分别构造出"N"字和"三"字形光幕。两台完全相同的天幕靶正交放置在弹道上,配合数据采集仪和计算机,依据数据采集仪记录的弹丸穿过各光幕的时间和光幕的几何参数,计算出弹丸的飞行参数。介绍了天幕靶的结构和光路设计以及测量原理,给出了测量公式。设计的天幕靶能够用于靶场,实现对弹丸速度、着靶坐标、飞行方向角的单项测量和多项同时测量。

Two novel electro-optical sensors （EOSs） are put forward, which can be used to measure simultaneously the velocity, impact position, azimuth, elevation of projectiles in flight. Using vacuum phototube with a large sensitive area, multiple slots diaphragm, and standard lens as basic component, the N-shaped and ＂三＂-shaped light screens are generated with respective slots diaphragms. The measuring system have cooperated with the dada acquiring device and a computer-based controller, the flying parameters are measured with two completely identical sensors placed on a given point of ballistic trajectory in vertical intersection manner. The mechanical and optical structure as well as measuring principle is introduced. The measuring formula is introduced. The electro-optical sensors designed can be applied in ranger and to accomplish measuring the velocity, impact position, and angle-of-arrival individually or jointly.