摘要
研究了基于平行激光幕大面积弹着点坐标测试方法。以半导体激光线发生器为光源,用长焦距消球差的柱面菲涅耳透镜形成平行激光幕单元,通过多个平行激光幕单元的无缝拼接可形成大面积靶面。由于平行激光幕单元内沿宽度方向通量密度呈高斯分布,一定直径的弹丸通过光幕的不同横向位置时探测器获取信号不同,因此可根据信号的幅值来细分平行激光幕单元宽度范围内弹着点的位置。通过口径为7.62mm的实弹射击试验验证了细分方法的可行性。结果表明了该系统有足够的灵敏度能获取小目标的过靶信号;在10m长靶面的试验系统中测量坐标值与弹孔测量坐标值差值的标准差为5.16mm。
The test method of the bullet impact location based on a large area and parallel laser screen was studied. Taking the laser diode line generator as the light source, the parallel laser screen unit was formed by using aplanatic cylindrical Fresnel lens with long focal length. By splicing seamlessly with multiple parallel laser-screen units, the large area laser screen can be constructed. Because of the Gaussian profile of the luminous flux density along the transverse direction in a parallel laser-screen unit when a bullet with certain diameter passes through different transverse location of the unit, the photo detector obtains different signal. Therefore, according to the amplitude of the signal, the bullet impact transverse location can be subdivided within the width of a parallel laser screen unit. The feasibility of such subdivision scheme is verified by live firing experiments of 7.62 mm caliber. Experiment results show that the system has sufficient sensitivity to acquire signals of small objects. For the length of 10 m laser screen, the standard deviation of differences between this system coordinate measured data and bullet holes coordinate ones is 5.16 mm.
出处
《光电工程》
CAS
CSCD
北大核心
2010年第3期18-23,共6页
Opto-Electronic Engineering
基金
国家重点实验室基金(9140C1204060809)
关键词
弹着点位置
菲涅耳透镜
平行光幕
大面积弹着点测量系统
bullet impact location
Fresnel lens
parallel laser screen
large area bullet impact location measuring system
