逃逸链梯性能测试台的研制

本文介绍一种用于逃逸链梯性能检验的测试台,本测试台可将逃逸链梯在水平方向安装,采用传感器来检测逃逸链梯阻力油泵的压强,链条所承受的拉力,链条的传动速度三种特征数据,用单片机将数据采集处理之后通过RS-232C传送到PC机内进行储存。对采集到的数据进行分析,可以得出逃逸链梯的性能是否达到要求。     

基于单片机的链梯降速控制系统的设计

提出一种高层建筑遇险无动力循环链梯逃生装置.链梯的速度控制是该装置的关键,本文设计一种基于单片机的智能控制器控制链梯匀速下降.     

基于A3144E无线测速系统设计与开发

为了便于对石油钻井滚动轴承的转动速度进行监控,进行数据收集及故障监测,本文设计了一种基于A3144E无线测速系统.该系统可以有效避免机械磨损,在测量过程中无需与被测物直接接触,从而减小了对被测物的影响,而且方便地进行后期维护,应用广泛.电路实物的测试结果表明,该系统的无线测速系统能准确测量被测对象.     

自适应模糊-PID控制器在链梯速度控制系统中的应用

链梯速度具有随负载而变化的时变特性,当负载变化时,采用传统的PID控制很难满足要求,为此本文提出了一种基于模糊推理的PID控制器,它利用FUZZY推理,对系统所处的不同状态实现PID参数的在线自适应控制,使系统在任何状态下,都能得到比传统的PID更好的控制效果和更强的鲁棒性,仿真结果也证明了这一点.     

自适应模糊-PID控制器在链梯速度控制系统中的应用

链梯速度具有随负载而变化的时变特性,当负载变化时,采用传统的PID控制很难满足要求,为此本文提出了一种基于模糊推理的PID控制器,它利用FUZZY推理,对系统所处的不同状态实现PID参数的在线自适应控制,使系统在任何状态下,都能得到比传统的PID更好的控制效果和更强的鲁棒性,仿真结果也证明了这一点。     

用VC++实现单片机与PC机串口通信的三种方法

在VC 6．0开发平台上，本文介绍运用MSComm控件、WindowsAPI函数、CSerial类实现单片机与PC机串口的通信。     

游泳竞赛信息自动采集系统

游泳竞赛信息系统已经成为大型游泳赛事系统的神经中枢,而其中的前端信息采集系统的准确可靠关系到整个游泳比赛的成败。本设计根据游泳竞赛信息采集系统的现状,采用基于单片机的理念,利用各种网络通信技术,实现游泳竞赛信息采集的自动化、网络化,完成游泳竞赛信息快速采集、可靠传输。保证精确度高、工作稳定且成本低廉。本系统重点是实现游泳计时和成绩显示以及传送成绩的功能。文章介绍了基于AT89S51的游泳竞赛信息采集显示系统设计,系统应用单片机来完成数据采集处理,通过LCD1602完成信息的显示,采用RS-232传输信息。     

电感式传感器测量转换模块的设计

电感式传感器所采用的测量转换电路输出的都是模拟信号,且都需要提供交流激磁信号,使用不方便.提出一种测量转换方法,即由单片机发出方波信号,经滤波放大后得到标准正弦波信号,用于电感式传感器激磁,传感器输出交流信号由隔离电量传感器变为直流信号后,再由单片机直接测量,测量结果以RS-232串口输出.根据该方法设计的电感式传感器测量转换模块具有电路简单、测量精度高和结果便于数字处理等特点.     

基于微机和单片机的图像浮雕控制系统

设计了一种基于微机和单片机串行通信的图像处理、传输及控制系统;实现了一幅图像在雕刻材料上的重现。系统由微机、单片机实现数据处理和控制,并通过微机的RS-232C接口和单片机的UART通用异步收发器的连接实现了串行通信。图像文件来自微机,并经软件(Windows环境下)处理编码,通过RS-232-C接口分步传给单片机。单片机接收解读后,编程、控制、驱动3台步进电机,按图像X,y坐标及各像素点灰度值完成在材料上的立体雕刻。系统实现简单,可以应用于工业、商业等领域。     

串行通信RS-232C电平转换器

介绍了三种串行通信RS-232C电平转换器:准RS-232C电平转换器、标准RS-232C电平转换器,MAX202接收发送器.     

稳压二极管测试系统的研制

本文介绍了稳压二极管测试系统硬件和软件的设计思路和实现方法。该系统是一种网络化的智能测试系统,操作简单、测试迅速准确,可同时测试多个稳压二极管的参数。     

A procedure for multimicroprocessor system testing during development

A little investigation would show clear advantages of more than one processor for many applications. From the other side, difficulties exist in prototype testing during design and development. This article describes a test strategy useful in multimicroprocessor system testing, using only one in-circuit emulator, together with test programs, which are described in detail.     

Software development and system testing techniques

Microcomputer software and development techniques are evolving rapidly. Text editors and debugging aids are becoming increasingly available, particularly on inexpensive hardware. A revolution will probably take place soon, with the appearance of complete development systems costing less than £1000.Software design methods are very much in vogue and the need for structure and documentation in microcomputer software cannot be overstressed. Which level of software to use is a problem that must be solved in the early days of system specification. The solution is often hybrid, composed of high-level code calling on lower-level assembler for fast or complex computations.System testing aids are becoming available with increased power and versatility. Multiprocessor development systems are now available with ICE (in-circuit emulation), a technique of real-time processor emulation that is receiving increased attention.This kind of support is still not cheap, but the value-for-money is improving rapidly.     

应用OLE技术开发通用型计算机辅助测验系统

介绍计算机辅助测验系统的功能和特点,重点讨论在 Ａｕｔｈｏｒｗａｒｅ应用程序中如何应用ＯＬＥ技术处理标准主观题的设计思想及其实现方法。     

Real-time simulated testing with a development system

This article describes the microprocessor aids system at the Atomic Energy Establishment, Winfrith. Facilities for developing microsystems (with, in principle, any type of microprocessor) can be provided by close-coupling them to a minicomputer. In some industries an essential adjunct to such systems should be facilities for simulating the environment of the microsystem for real-time testing and this may influence the choice of development system.     

Model based testing in incremental system development

The spiraling nature of evolutionary software development processes produces executable parts of the system at the end of each loop. It is argued that these parts should consist not only of programming language code, but of executable graphical system models. As a main benefit of the use of more abstract, yet formal, modeling languages, a method for model based test sequence generation for reactive systems on the grounds of Constraint Logic Programming as well as its implementation in the CASE tool A F is presented.     

电力系统短路实验台控制系统研究与开发

本文介绍了一种适用于电力系统短路实验的实时数据采集和控制系统,主要阐述了系统的整体设计、短定时的实现和串行通信程序的设计.     

电力系统短路实验台控制系统研究与开发

本文介绍了一种适用于电力系统短路实验的实时数据采集和控制系统,主要阐述了系统的整体设计、短定时的实现和串行通信程序的设计.     

Guaranteed strategies for escaping encirclement

This paper considers a conflict situation on the plane as follows. A fast evader E has to break out the encirclement of slow pursuers P _{j1,...,j n} = {P _j1,..., P _jn }, n ≥ 3, with a miss distance not smaller than r ≥ 0. First, we estimate the minimum guaranteed miss distance from E to a pursuer P _a , a ∈ {j ₁,..., j _n }, when the former moves along a given straight line. Then the obtained results are used to calculate the guaranteed estimates to a group of two pursuers P _b,c = {P _b , P _c }, b, c ∈ {j ₁,..., j _n }, b ≠ c, when E maneuvers by crossing the rectilinear segment P _b P _c , and the state passes to the domain of the game space where E applies a strategy under which the miss distance to any of the pursuers is not decreased. In addition, we describe an approach to the games with a group of pursuers P _{j1,... jn} , n ≥ 3, in which E seeks to break out the encirclement by passing between two pursuers P _b and P _c , entering the domain of the game space where E can increase the miss distance to all pursuers by straight motion. By comparing the guaranteed miss distances with r for all alternatives b, c ∈ {j ₁,..., j _n }, b ≠ c, and a ? {b, c}, it is possible to choose the best alternative and also to extract the histories of the game in which the designed evasion strategies guarantee a safe break out from the encirclement.