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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 new types of canopy target design principles are proposed. With the sensitive surface of a larger vacuum phototube, multi-slit aperture plate and standard optical photographic lens as the basic components, the slit aperture plate is designed as “N ” and “three ” glyphs, respectively Constructed “N ” and “three ” glyph screens. Two identical canopies were placed orthogonally on the trajectory, with the data acquisition instrument and the computer, according to the data acquisition instrument records the time of the projectile through the light curtains and light curtain geometric parameters to calculate the projectile flight parameters. The structure and optical design of the canopy target and the measuring principle are introduced, and the measuring formulas are given. The designed canopy target can be used on the shooting range to achieve single measurements and multiple simultaneous measurements of projectile velocity, target coordinates, flight direction angle.