多线程技术在条纹采集中的应用

基于多线程技术的光栅条纹实时采集采用MFC AppWizzard创建程序框架并自动生成主线程.并编写捕获标志信号程序,自定义消息.编写消息处理函数,在消息映射中加入代码,自定义消息映射.用主线程的初始化函数创建并启动采集线程,设置线程的相对优先级.采集线程捕获帧数据标志信号并发送到主线程,主线程收消息,执行相应的处理.线程的同步由数据转存法实现,从而实现光栅条纹实时采集.     

散斑位移信息图象处理技术及应用

运动学支撑定位精度检测,采用激光散斑干涉法记录被测体特定平面的位移,以获得6自由度刚体位移分量.其图象处理技术是用细激光束对处理好的散斑图进行照射以获取图象(即杨氏条纹图),通过增强、滤波、提取条纹中心线等技术对获取的图象进行处理,提取出杨氏条纹图象在X、Y、Z三个方向的条纹间距,从而分析出被测物体特定平面内的位移信息,精度达到0.4μm.实验证明,该技术提高了运动学支撑定位检测精度.     

位标器转子光电测角的解析法分析与仿真

位标器角线圈测量角信号存在原理上和工程中难以避免的非线性因素,不易得到较好的线性信号.光电测量法利用在陀螺转子上刻上黑白条纹测量角,采用这种方法可以不受磁场、涡流等因素影响.文中对此方法的原理进行了数学推导和仿真分析,仿真结果表明与传统的测量方法对比,新方法可以在更大的角度范围内得到线性度更高的角信号,有较高的工程应用价值.另外文中还对角信号的作用以及角线圈测得的角信号产生非线性因素的原因作了介绍.     

激光速度干涉仪测量炸药驱动金属的运动速度

为了准确观察炸药驱动金属运动的细节。用激光速度干涉仪（VISAR）测量了金属平板表面速度变化历程，介绍了激光速度干涉仪测量参数确定和原始干涉波形信号的处理方法。讨论了波形信号丢失情况，如何判断丢失的条纹数及对测量速度进行修正的方法。对于单灵敏度激光速度干涉仪，通过对测量速度的理论估算。能够帮助判断丢失条纹数。从而得到正确的测量结果。     

光电测量技术在工业中的应用摘要

随着近年光电技术的突飞猛进及工业厂家为提高生产效益而进行技术改造的要求日益迫切,光电测量忮术逐渐在工业中占有了一席之地。 文章根据近年来从事工厂测控设备的实践,扼要叙述了成象法、双测头法,激光三角法、光栅法、干涉法、莫尔条纹法、编码器法及叠纹法用于工厂长度测量,角度测量及三维轮廓测量的基本原理和主要应用     

VLBI相关处理器动态条纹拟合方法

甚长基线干涉测量(VLBI)是重要的超远距离飞行器测角技术,具有极高的空间分辨率。相关处理是VLBI系统的重要组成部分,通过分析模型补偿后残留条纹误差的特征及其对长期积累算法的影响,建立了残留延迟的状态转移模型,设计了基于卡尔曼滤波的改进算法进行残留延迟率估计。对卡尔曼滤波的收敛速度及估计精度进行了分析。仿真实验表明,通过利用尔曼滤波算法对延迟率的拟合处理,相关处理器长期累加处理增益得到有效提高。     

干涉法测量端面长度标准中条纹图的自动处理技术研究

介绍利用激光干涉与数字图像处理技术以及应用FFT分析干涉条纹方法分析并解决测量端面长度标准中条纹图的处理技术，应用这种方法不但提高了测试过程的自动化程度，而且大大地提高了测量结果的精度。文中给出了最典型的端面长度标准量块的干涉条纹小数部分的实测结果。     

空间扫描和傅里叶变换算法分析干涉图

对于含有载频条纹的干涉图,在垂直干涉条纹方向利用空间扫描方法,将干涉图幅照度数值化,通过傅里叶变换算法复原波面。本文在阐述上述原理和实验验证基础上,着重讨论灰度量化等级、载频频率、数字化采样点数、象素矩阵、波面形状等有关参数与方法原理误差的关系。对于虚拟理想干涉图分析计算表明:在优选诸参数情况下,方法的原理误差约为λ/50～λ/100。     

光纤布拉格光栅应力传感器

光纤Ｂｒａｇｇ光栅受到一应力梯度作用时，由于光栅的啁啾，使反射频谱不仅偏移，而且发生畸变。本文用散射矩阵公式计算了光纤Ｂｒａｇｇ光栅反射频谱受不同应力梯度作用的影响，并用实验验证了其计算结果。理论分析和实验证明，光纤Ｂｒａｇｇ光栅能方便地测量应力应变的大小分布，并能作为准分布式传感器阵列，对压力的变化进行连续在线实时检测。     

激光扫描条纹管成像水下探测技术进展

论述了激光扫描条纹管成像的基本原理、国内外发展和应用情况以及国内初步试验结果。可利用以条纹管成像为基础的水下激光扫描成像探测技术,增加水下光学探测距离,提高水下探测速度和效率;在水下无人航行体(UUV)、舰载、机载等装备上实现快速探测和识别水下目标。     

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。     

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.     

Design and Implementation of One Missile Visual Simulation System Based on OpenGL

The implementation of a missile＇s visual simulation system is explained that is developed with OpenGL（open graphic library） and the flight path and flight carriage in different stages of the missile are displayed. The establishment problems of the 3D scene are circumstantiated including the construction and redeployment of the model, creation of the virtual scene, setting of the multi-viewports and multi-windows etc. The missile＇s data driver, system flow, the modules and their mutual relations of the missile visual simulation system are discussed. The missile flight simulation results and effect of the scenes are given.     

Dynamic Encryption Technology in Ad-hoc Networks

A new dynamic encryption application in ad-hoc networks is proposed. The advantages of this method are its being able to use the previous ciphertext as a seed of a new encryption process, rendering the encryption process effective in all communication process by continuous dynamic key generation together with synchronization, and its capability to cut back on system bandages to a greater extent, which is valuable for the ad-hoc circumstance. In addition, the rationality and effectiveness of this novel encryption method have been verified by the test results.