国产某型兵器指令信号的单片机产生方法探讨

文着重论述了单片机产生国产某型兵器指令信号的一种新的方法,介绍了用单片机产生K_1、K_2、K_3、T等信号的原理,外围电路,以及软件框图。同时,还介绍了询问信号的产生及原理电路。整个方案,简单经济,易于实现,可望应用于对该兵器模拟机柜的改进之中。     

控制器模拟电路数字化

将单片机技术应用到导弹的控制器中,使原模拟控制器电路数字化、从而通过编程便可方便地改变控制器的控制规律并提高其动静态性能,对提高军品质量具有现实意义。该数字化控制器以80C196为主。包含74LS373、程序存储器2764、晶振电路和复位电路的单片机系统,及隔幅电路、电源转换电路和滤波电路等外围电路2倍分组成。数字化控制器控制软件采用PL／M－96高级语言编程,其中断处理程序用于辨别信号频率、累计每一频繁持续时间。文中提供了单片机系统和外围滤波电路原理图,以及中断处理程序和主程序框图。     

足球机器人控制器的设计

足球机器人控制器由AT90S8515单片机,无线电接收、电压检测、电机驱动和速度检测等电路,以及碰撞开关组成.单片机执行主机控制指令,控制无线接收单元,处理速度检测单元信号.依据主机指令调整双轮的驱动速度,实现机器人的前进、后退、左转、右转.控制单元收到碰撞开关信号后,可按固定程序绕行以避免塞车.     

数字式工频交流电参数多用表

数字式工频交流电参数多用表以I2C总线数字式电位器AD5242为核心,其采样算法有一点、两点及多点.硬件设计包括含数字电位器的信号放大、模拟开关及A/D转换、波形变换、单片机及其外围等电路.软件包括监控、键盘扫描、数据采集与处理、显示等子程序.     

基于单片机控制的自动报靶系统

介绍一种瞄准练习用的自动报靶系统,系统主要由无线发射及无线接收两部分电路组成.发射电路完成靶面瞄准点数据的采集并由无线传送;接收电路将收到的数据进行处理,并控制语音播报与液晶屏显示.     

水中近距超声波探测器发射信号电路的设计

水中近距超声波探测器用于深弹接近目标的探测和引爆。根据多卜勒频偏检测原理,该探测器由发射机、转换电路、接收机和信号处理电路构成,发射信号是设计的关键。其时钟产生电路采用1MHz晶体振荡器,产生500kHz超声波脉冲;分频控制电路以500kHz为填充频率的脉冲信号,经过同步检波后变为多卜勒频偏直,作为填充的脉冲信号;发射信号电路考虑与水听器匹配,采用双发射管并联结构。这种高频非周期窄脉冲信号,具有频率高、能耗小、波长短、绕射现象小、方向性好、发射器体积小等优点,特别适合应用于深弹复合引信中。     

虚拟仪器在罗兰C导航仪检测中的应用

基于虚拟仪器技术的罗兰C导航仪检测硬件包括计算机、USB接口及其干扰抑制、单片机、信号发送接收、被测设备等.USB接口与单片机的数据采用异步传输.由罗兰C信号模拟器向罗兰C导航仪发送所需信号,通过改变前端信号发送、接收单元的信号激励及响应形式,以判断该设备工作状态及性能指标.     

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.     

基于PC的三维场景反坦克导弹模拟训练系统

反坦克导弹模拟训练系统由PC、发射模拟单元和系统软件构成.采用Visual C 及OpenGL编程技术,实现战时场景三维模拟、弹道实时显示.RS-232接收导弹飞行控制信号,并口接收发射控制信号并发送发控设备状态信号.其硬件由中央处理、模拟发射/控制、视景、接口等单元组成.软件含接口、控制、仿真、数据库等模块.     

AVR单片机+CPLD体系在测频电路中的应用

在测频电路中,其系统单片机与CPLD硬件接口采用独立工作方式.系统上电复位后,CPLD接收经过处理的待测频信号,并通过内部脉冲计数模块得到时间数据,然后通过与AVR单片机相联的14位端口,把时间数据传给AVR单片机.AVR单片机将数据存储并计算处理后,传给数码管,完成数据的动态扫描显示.     

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.     

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.     

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。     

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.