单声束周向旋转扫描探测技术

针对阵列式超声探测系统空间限制和固有盲区的问题,提出了一种新型的超声波周向扫描方案.设计了可以实现调节声波信号发射角度和转速旋转扫描机构,该结构简单可靠.对超声波声场进行仿真,使用具有增强声场和指向性的超声传感器.在同步扫描系统的基础上,对单声束探测目标车辆信息、回波信号和脉冲频率与转速匹配关系进行数值仿真分析,确定信号脉冲频率与电机扫描转速的最佳匹配参数.使用原理样机进行扫描探测实验,结果表明:当超声脉冲频率f≥27 Hz,周向扫描转速范围n=233 r/min,周向扫描探测系统能捕获速度低于70km/h的目标车辆,同时验证了超声波周向扫描探测可行性,为单束超声周向探测系统设计提供依据.     

炮兵射击条件自动处理系统设计

炮兵射击条件自动处理系统由PC-104、激光观测仪、信息机和火炮终端机构成,包括主控、数采、通信、射击作业等软件模块.温度和气压传感器、风向风速仪、电子罗盘及GPS采集战场射击条件,激光观测仪与信息机结合采集目标信息.通信模块完成工控机与信息机、火炮终端机及上级系统的数传.数采模块采集传感器信息并传至工控机.射击作业模块解算并修正开始射击诸元.工控机负责数采、射击作业、战况显示、数据通信、数据库管理等.试验表明该系统的射击开始诸元更接近目标射击诸元.     

牵引高炮自动调平系统

针对牵引高炮采用人工手动调平,调平时间长,调平精度爱人为因素影响大等弊端,对牵引高炮自动调平系统进行设计,探索出一套适应复杂战场作战环境的牵引高炮自动调平系统,其由检测、控制,通信和执行等部分组成,软件部分采用模块化设计,包括通信模块、按键模块、指令模块、监视模块。该设计可有效提高牵引高炮的机动性、可靠性、稳定性及射击精度。     

基于Arduino控制器的智能垃圾桶设计

针对人们的日常需要,设计一种以Arduino开发板为控制器的智能垃圾桶.利用Arduino控制器模块、电源模块、语音识别模块、无线传输模块、超声波模块和电机驱动模块搭建垃圾桶的硬件电路,通过对单片机的开发以及各模块对比选用、程序调试,实现垃圾桶的功能.试验测试结果表明:该设计能实现语音或手机等通信工具对垃圾桶的控制和自主避障,具有一定的应用价值.     

火灾预警系统中的信息融合

基于多传感器数据融合的火灾预警系统由传感器、数据处理融合、集中控制器、报警、执行和通信等模块组成.传感器、处理器和控制器间采用Lonworks总线,在LonTalk协议协调下形成网络控制系统.该火灾预警系统中,利用Lonworks的Neuron C芯片对数据预处理,然后用通信网络传输数据,再由上层的芯片对压缩数据融合,提高了火灾探测灵敏度.     

一种新型灾难救援四轴航拍飞行器设计

为解决我国灾后搜救困难问题,设计了一种新型灾难救援四轴航拍飞行器。采用GPS卫星定位,控制系统以STM32为主控核心,控制算法采用PID控制,硬件主要包括、电机调速模块、姿态检测模块、超声波测距模块、人体红外传感器模块、GPS模块、摄像和无线遥控模块。通过飞行测试验证了设计的四轴航拍飞行器可行性及系统性能。实现了无线遥控以及远程视频传输。     

DataSocket在网络化通信中的应用

采用DataSocke的网络化通信,其数据传输包括:运行DataSocket服务器、发送数据、接收数据和关闭DataSocket服务器4个模块.接收数据模块包含运行DataSocket服务器模块、停止DataSocket服务器模块以及从服务器中读取数据的功能.服务器地址可输入远程服务器或本服务器.当停止远程访问时,系统将停止正在运行的DataSocket服务器.     

基于短时傅里叶变换的跳频信号检测系统设计

基于长短窗口结合的傅里叶变换技术,设计出一种适用于装甲车辆通信设备的信号检测系统,该检测系统由射频处理模块、中频处理模块和ARM处理模块组成.试验室测试结果表明,该系统能够对车载通信设备跳频信号主要性能参数进行实时检测,达到了判定跳频设备工作状态是否正常的目标,从而满足了装甲车辆通信的正常需求.     

基于STM32的自由活塞内燃发电机电控系统设计

围绕STM32F407设计了符合自由活塞内燃发电机控制需求的电控系统,并匹配设计了对应软件.从样机结构特点、运行特点入手,分析了控制系统具体功能与需求,提出STM32与FPGA联合控制的总体方案,并介绍了处理器单元模块、数据采集模块、驱动模块以及通信模块的硬件设计.提出通过运行速度调整后续控制参数的控制策略并进行仿真,使用软件分层设计思想以及前沿工具STM32Cube MX进行ECU软件开发.最后试验验证了ECU与PC之间串口通信的实现.     

基于嵌入式SPT-K控制器的超声波测距系统

基于嵌入式SPT-K控制器的超声波测距系统由信号发生及调理、测温变信号电路、放大、监测、报警输出等模块组成.0.2ms信号发生电路调理40kHz频率信号,驱动双工模式40RS/UT180超声波传感器,检测反射回波,放大输入锁相环LM567监测电路,送入控制器.并用最小二乘法拟合实验数据给予验证.     

Nitrosation and Nitration of Tetraacetyldibenzylhexaazaisowurtzitane

Tetraacetyldibenzylhitane (TADBIW) was subjected to debenzylation by nitrosating with inorganic materials available commercially to synthesize tetraacetyldinitrosohexaazaisowurtzitane (TADNSIW). TADNSIW was purified, and its structure was determined by FTIR, 1H NMR, MS and element analysis. The debenzylation reaction of TADBIW gave quantitative benzaldehyde as a by-product. This indicates that the reaction produces an imine cation as an intermediate. Hexanitrohexaazaisowurtzitane (HNIW) was prepared from unpurified TADNSIW with the yield over 96.0 % and the purity more than 98.0 %. And the mechanism of the reaction from TADNSIW to HNIW is proposed to be oxidation of nitroso and nitration of acetyl on the molecule of TADNSIW, This reaction system involved is simple, and the reaction can complete within a short time and under mild conditions. The product can be easily to separate and the waste disposed readily.     

A Robust Algorithm for Watermarking 2D Vector Maps with Low Shape-Distortions

The technique of watermarking has been introduced into 2D vector maps for many potential applications such as protecting the copyright of important GIS （geographical information system） data and tracing the data source of military maps. In most previous works, although the validity of the map data could be preserved during the embedding procedure, the shape-distortions of the map elements are usually neglected which would tend to degrade the invisibility of the watermarking schemes. A shape-preserving algorithm for watermarking 2D vector maps is presented in this paper. A 1D distance sequence extracted from the original map is adopted as the cover data instead of 2D coordinates. A watermark bit is represented by changing the distributions of the cover data. The embedding procedure induces lower shape-distortions than in former works. Experimental results indicate better invisibility of the proposed scheme, as well as its robustness to certain attacks such as map simplification, interpolation, additive noise and most geometric transforms.     

Open Rule-setting System Applied to Conceptual Design of Engines

Open rule-setting method advanced in this paper concentrates on providing designers of engines with a convenient way to express their design innovations and develop the expected prototypes in the early CAD stage, and constitute effective models for the following analysis process of CAE and CAPP. The problems arisen in the process of conceptual design with the traditional experience-based development method are analyzed. Based on those analyses, open rule-setting method is presented and some associated technical problems are discussed. The functional framework of open rule-setting system was built as software engineering methods. The speciality of the engine product as a kind of complex product and the requirement of the engine product based on its structural particularity to rule-setting system are considered carefully. A demonstration is supplied to illustrate how the open rule-setting method enhances the efficiency and quality of the engine conceptual design.     

Research on Linux Network Device Driver

By analyzing the working principle of Linux network device driver, discussing the Linux network driver structure and its key technologies, the general network driver structure and its design methodologies in Linux system are summarized. Through modifying the network device driver of Linux device driver 3rd version snull, c and improving the COW technology, the Zero-Copy technology in Linux （kernel version 2.6.11 ） is implemented. In the end, the success test tells us that the thorough analysis of network device driver is the foundation of many applications, and it also provides a certain improvement to a lot of real applications, even to military application development.     

Method for Measuring Velocity of Warhead Fragments Based on Photoelectric Detection

For measuring velocity and impacting position of single fragment of warhead, a non-contact measuring method is proposed, in which a six-light-screen array, a position indicator, a multi-channel chronograph and a computer are used.The principle of measurement is described. The key device of the system is a light screen array sensor which consists of six light screens allocated with certain geometrical parameters. When the fragment flies through the light screen array, the time of passing through each of the screens is recorded by the multi-channel chronograph. According to the time data and the geometrical parameters of the array, the velocity vector and the location of the fragment can be calculated immediately. The presented method can be used to locate the fragment and to measure the real velocity on its flying direction. It can also be used to measure the velocity of a fragment swarm after the system is engineered further.     

数码电子雷管中影响点火头性能因素分析

阐述了数码电子雷管中,点火药剂细结晶三硝基间苯二酚铅（LTNR）的制备工艺;从点火药剂的种类、加入黏合剂的质量分数、桥丝直径、点火头的电阻值、防潮漆的蘸涂等方面对点火头性能的影响因素进行了探讨;通过震动试验、并联起爆试验、延期精度检测与考核,试验结果表明：一次性合成的细结晶LTNR是制造数码电子雷管点火头较为理想的点火药剂,按技术要求生产的点火头性能指标能够满足行业标准要求。     

Improvement and Experiment of the Reamer in Vibra Cutter Against Wave Edge of Titanium Sheet Alloy Parts

By analyzing the influencing factors of part quality making of sheet alloy of titanium by vibra cutter, the shape of upper reamer is set as cylinder and wedge-shaped form, and the lower reamer as plain and hemicycle form, and its main structural parameters are defined as well. Then it is validated further that such improved vibra cutter reamer can be used to process curve-edged parts of titanium alloy sheet. The experimental result shows that the titanium alloy sheet parts processed by above equipment have no sharpen angles for convex parts and evident crevasse of concave-edged part. In summary, such improvement can eliminate the free-waved edge and improve the manufacture quality of titanium alloy sheet parts greatly.     

Experimental Study on the Small Flyer Initiating Behavior of Fine-grained Explosives

The initiating behavior of fine-grained explosives by small flyer is studied. The diameter of small flyer in this device is 1 ram. The test results indicate that the granularity of explosives has great effect on its flyer initiating sensitivity.The flyer initiating sensitivity of the fine-grained explosives is higher and the critical initiating energy is lower than that of common explosives. For common explosive, the flyer initiating sensitivity increases as the density is reduced. But for the fine-grained explosive, the test results are exactly opposite.     

Algorithm for Multi-laser-target Tracking Based on Clustering Fusion

Multi-laser-target tracking is an important subject in the field of signal processing of laser warners. A clustering method is applied to the measurement of laser warner, and the space-time fusion for measurements in the same cluster is accomplished. Real-time tracking of multi-laser-target and real-time picking of multi-laser-signal are introduced using data fusion of the measurements. A prototype device of the algorithm is built up. The results of experiments show that the algorithm is very effective.     

Influence of Installing Error on the Surface Shape Precision of the Axial Symmetry Aspheric Workpiece in Lapping

A method to calculate the surface shape error, which is caused by the installing error between the workpiece and the lapping tool in the process of form lapping, is proposed. The mathematical model which the installing translation error influences on the workpiece surface shape error is established. The changing rule of the error is simulated through the calculating example of the paraboloid workpiece. The results indicate that the surface shape error of the workpiece is increasing with the increase of the installing translation error, it is also increasing gradually along the center point of the curve surface to the edge, and the influence is severer to the curve surface with great curvature than that of the small curvature when the translation error is the same.