大面积平行光幕弹着点测试系统

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10 m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5.16 mm.     

基于水平集的弹创瞬时空腔X射线投影图像分割方法

弹创瞬时空腔多呈椭圆形,在近伤道入口和出口处,由于受到外界压力和进入气流的影响,瞬时空腔比伤道中央部小.根据目前弹创弹道学方面的知识和临床经验,往往不能准确检测出弹创瞬时空腔弱边缘.本文引入Char-Vese水平集算法,利用自动阈值分割算法获取水平集初始轮廓线,利用零水平集曲线的平均边缘能量控制演化速度,利用零水平集停...     

A Brief Study on the Ignition of the Non-Thermal Atmospheric Pressure Plasma Jet from a Double Dielectric Barrier Configured Plasma Pencil

To understand the self sustained propagation of the plasma jet/bullet in air under atmospheric pressure, the ignition of the plasma jet/bullet, the plasma jet/bullet ignition point in the plasma pencil, the formation time and the formation criteria from a dielectric barrier configured plasma pencil were investigated in this study. The results were confirmed by comparing these results with the plasma jet ignition process in the plasma pencil without a dielectric barrier. Electrical, optical, and imaging techniques were used to study the formation of the plasma jet from the ignition of discharge in a double dielectric barrier configured plasma pencil. The investigation results show that the plasma jet forms at the outlet of the plasma pencil as a donut shaped discharge front because of the electric field line along the outlet’s surface. It is shown that the required time for the formation of the plasma jet changes with the input voltage of the discharge. The input power calculation for the gap discharge and for the whole system shows that 56% of the average input power is used by the first gap discharge. The estimated electron density inside the gap discharge is in the order of 1011cm-3 . If helium is used as a feeding gas, a minimum 1.48×10-8C charge is required per pulse in the gap discharge to generate a plasma jet.     

万向节轴承安装工装的设计制造

采用新的设计方法,制造一组工装,简单、稳定、可靠、高效地完成万向节轴承的安装工作。     

枪弹自动化包装设备控制系统

为解决目前国内枪弹包装行业自动化程度、生产效率低的问题,结合机械结构与控制系统硬件,设计一套基于PLC的枪弹自动化包装设备控制系统。对枪弹自动化包装设备的应用现状进行分析,简介其功能及工作原理;介绍以PLC为核心的控制系统硬件设计,说明控制系统的体系结构;介绍控制系统软件的方案设计,说明系统各组成部分控制模式。测试结果表明：该系统运行稳定、安全可靠、故障判断准确、数据采集实时;包装结实,适宜运输、储存;系统自动化程度和工作效率得到有效提高。     

基于Pro/E的弹箭加工及数控程序管理系统的研究与开发

针对现代兵工企业的弹箭产品变批量、快速自动加工等特点,利用Pro/E这一大型三维软件为基础平台,深入研究其二次开发技术,在面向对象编程工具VC++6.0集成环境下研究开发了弹箭加工及数控程序管理系统,对数控代码自动生成过程进行了系统介绍,并对管理系统的开发思路、功能实现进行了详细说明。     

Passive Acoustic Radar for Detecting Supersonic Cruise Missile

A Passive Acoustic Radar is presented as a necessary complement to electromagnetic wave radar, which will be expected to be an effective means for detecting cruise missiles. Acoustic characteristics of supersonic flying projectiles with diverse shapes are expounded via experiment. It is pointed out that simulation experiment could be implemented using bullet or shell instead of cruise missile. Based on theoretical analysis and experiment, the ““acoustic fingerprint““ character of cruise missile is illustrated to identify it in a strong noise environment. After establishing a locating mathematical model, the technique of acoustic embattling is utilized to resolve a problem of confirming the time of early-warning, considering the fact that velocity of sound is much slower than that of light. Thereby, a whole system of passive acoustic radar for detecting supersonic cruise missile is formed.     

SRM 2460/2461 Standard Bullets and Casings Project

The National Institute of Standards and Technology Standard Reference Material (SRM) 2460/2461 standard bullets and casings project will provide support to firearms examiners and to the National Integrated Ballistics Information Network (NIBIN) in the United States. The SRM bullet is designed as both a virtual and a physical bullet profile signature standard. The virtual standard is a set of six digitized bullet profile signatures originally traced from six master bullets fired at the Bureau of Alcohol, Tobacco and Firearms (ATF) and the Federal Bureau of Investigation (FBI). By using the virtual signature standard to control the tool path on a numerically controlled diamond turning machine, 40 SRM bullets were produced. A profile signature measurement system was established for the SRM bullets. The profile signature differences are quantified by the maximum of the cross correlation function and by the signature difference between pairs of compared profile signatures measured on different SRM bullets. Initial measurement results showed high reproducibility for both the measurement system and production process of the SRM bullets. A traceability scheme has been proposed to establish the measurement traceability for nationwide bullet signature measurements to NIST, ATF and FBI. Prototype SRM casings have also been developed.     

射孔弹弹体材料成分对组织性能的影响规律

油田射孔弹广泛应用于石油开采领域,射孔弹的爆炸力越强,穿透井下岩层的距离就越远,越有利于扩大油田采油半径,提高产油率,降低成本。文中通过探讨射孔弹弹体材料成分对性能的影响规律,最终获得射孔弹弹体的最佳成分配比,为提高其各项性能奠定理论基础。     

枪弹弹丸被甲剥离机的设计应用

研制了一种枪弹弹丸被甲剥离机,较好地解决了大口径枪弹弹丸难以销毁和销毁不彻底的难题,能够满足报废弹药末端处理彻底的作业需要,具有较高的社会效益和军事效益,以及很好的推广应用前景。