液压测试系统的软件设计

根据液压系统的测试要求,介绍系统的软件测试系统的设计,并根据测试要求设计出计算机测试系统的界面,真正实现人机交互功能。     

基于ADuC841单片机的嵌入式系统总体设计研究

可编程逻辑控制器(PLC),是一种为工业控制特别设计的专用计算机。因为它易于设置和编程,运行可预估,甚至在恶劣的生产环境下还可以保持正常工作,所以广泛应用于工业控制。作为一个嵌入式系统,其设计和开发过程分硬件和软件两部分进行。但硬件和软件的开发又是相互联系、密不可分的。在分析PLC的主要体系结构和工作原理的基础上,提出基于单片机的通用控制器的设计需求和方案,使其能在硬件和软件上都能模拟PLC工作方式。     

浅谈基于UML的实时系统开发

我们看一下挑战VoIP及其向开发商提供的应用服务.我们开发用例工具用来建模和VoIP应用的设计验证.除非它能够提供一个强于传统电话的音频质量voIP应用将不会被市场接受,然而目前对语音模块的应用分析并没有符合上述要求,我们将探讨如何改变设计和实施以满足这些要求.虽然UML其目前的规格不适合实时应用的设计,但CASE工具存在提出了用于这一目的一种UML扩展.我们将介绍Rational R0se RT和Telelogic Tau重新设计应用程序的用处以用于支持我们的需求,介绍最新UML的概念,将有助于解决我们的任务,进一步证明了重要新概念的UML2.0.     

电位差计微机控制检定系统的软件设计

本介绍运用ＩＥＥＥ－４８８８接口，联接１０８１七位半数字万用表，应用ＧＷＢＡＳＩＣ语言，制作完成可对ＵＪ３３ａ，ＵＪ３６等便携式电位差计进行检定的微机辅助检定系统。     

面向对象的柔性测量系统及其软件设计

近年来提出和迅速发展的VXI总线技术是测试领域的一场革命 ,代表着自动测试领域的发展方向。本文介绍了面向对象的柔性测量系统的内容及其结构 ,分析了系统的软件及其硬件设计方法     

一种实时监测系统的体系结构及软件设计

本文介绍了监测点多、面广、距离远、采用无线通讯方式的实时监测系统的体系结构,阐述了其软件结构和功能,讨论了系统实时性、可靠性、灵活扩充性和数据库系统的设计和实现。本文工作对新型实时监测系统的设计与实现有一定参考价值。     

软件设计模式应用初探

综述软件设计模式的基本要素,以及面向对象软件的各种设计模式,描述各种模式之间的关系,并对设计模式的正确使用做简单陈述,最后就软件模式应用作展望。     

基于虚拟仪器的飞行参数记录系统的软件设计

介绍了一套基于飞行参数记录系统硬件，用Lab VIEW和C语言设计的飞参激励器测试系统软件。该软件采用最新的虚拟仪器软件模式，使用模块化思想，建立起了飞行参数采集记录的自动化和智能化的测试系统。该系统采用数据对比的形式进行显示，具有精度高，使用方便，界面友好，系统开放，容易扩展等特点；并有着强大的交互和控制功能，能够及时准确快速的对飞参系统进行测试和维护。     

网络化校准测试系统及其软件设计技术研究

在目前的计量校准工作中，各种各样的自动测试总线系统，如：GPIB、VXI、PXI等得到了日益广泛的应用。随着科学技术的飞速发展，测试的信息量愈来愈大，要求的测试数据处理速度也愈来愈高．有的还需要多个微机甚至工作站来完成测试的控制和信息处理(即实时测控和处理)，如一些大型的     

UML时间顺序图的实时系统建模及验证

实时系统中的一点疏漏可能导致灾难性后果,故确保该类系统正确性和可靠性是至关重要的,而建模无疑是一种很好的解决办法.形式化建模方法使用具有严格数学语义对系统进行描述,但是形式化模型不够直观,形式化规格难以理解.扩展UML顺序图实现对实时系统的建模及形式化验证,并给出实例.     

嵌入式网络化变电所电能量管理系统

 电能量管理系统是变电所自动化系统的重要组成部分．提出并研究设计了嵌入式网络化电能量管理系统,
以高性能嵌入式处理器和嵌入式实时操作系统为核心进行系统设计． 系统通过以太网口或嵌入式MODEM ,基于
TCP/IP协议进行网络通信,具有高可靠性、高实时性的特点．详细论述了系统设计、硬件设计和软件设计,并给出
实际运行结果．     

实时图像的电子消旋系统

为了消除图像旋转对准确进行目标的自动识别和跟踪带来的影响,提出了一种基于FPGA的电子学消旋方法。该方法利用旋转算法将原图像反向旋转相应的角度,再用双线性插值方法进行重采样,从而得到消旋后的图像。在此基础上构建了以XC2S200-5PQ208为核心处理器的实时图像消旋系统。这种电子学的消旋方法能够克服光学消旋系统加工困难、功耗大、角度分辨率低、体积大等严重不足之处。实验结果表明,该系统能够成功地对256×256×8bit的灰度图像进行实时消旋处理,其消旋角的分辨率最小可达到3′,最大像素误差小于一个像素。     

A real-time system for power quality testing

This paper presents a real-time system that can be used for quick and reliable power quality testing. The system is based on a dual-processor architecture with a digital signal processor (DSP) interfaced to a personal computer (PC). Real-time tasks are delegated to run on the optimized hardware of the DSP board, while system-level requirements are handled by the PC. The real-time processing (RTP) kernel implemented on the DSP supports multitasking to handle tasks associated with data collection, data analysis, and interprocessor communication. The results of real-time analysis are presented in the PC through a menu-driven, graphical interface. Tests show that the system complies with IEC standards for power quality monitoring. This system offers many significant advantages. Real-time analysis of acquired data significantly reduces storage requirements. Data analysis algorithms can be modified to suit specific testing needs. Test results available in the PC can be exported to other computer analysis tools. The system is portable and holds promise as a powerful, low-cost tool for practising power quality engineers     

油品含水率多点实时监测系统的研制

提出了润滑系统油品含水率多点在线实时监测系统的实现方法,设计了基于变介电常数式电容传感器的润滑油品含水率变送器,根据高速线材厂液压循环润滑系统的特点,利用组态王软件,实现对液压系统的润滑油含水率进行多点实时监测.通过在高速线材厂液压循环系统的使用证明,该系统能够准确、快速地测出润滑油品的含水率并及时报警,从而避免了润滑失效所带来的潜在危害.     

A new system for real-time synthetic aperture ultrasonic imaging

The authors devised a way to generate in real time a cross-sectional image of an object with uniformly high resolution based on the synthetic aperture focusing technique (SAFT). A computer simulation was conducted to study the effects of essential parameters on the resulting images. An imaging system was built that produces a cross-sectional image composed of an assembly of line images of depth direction, i.e. processed A-scan images, and displays a scroll picture on a CRT (cathode ray tube) with no interruption regardless of the object size. It takes only 3 ms from the start of transmission of the ultrasonic wave to the completion of a line image reconstruction, and the framed image on a CRT is updated at the TV rate of 1/30 s. Imaging experiments were conducted using the system, and its expected performance was demonstrated.     

Large-area, real-time imaging system for surface acoustic wavedevices

A system for imaging the particle displacement envelope of vibrational (transverse) modes of surface acoustic wave (SAW) devices is described. The modes are being imaged using a schlieren method for visualizing the acoustic power flow with a beam-expanded helium-neon (HeNe) laser. The optical arrangement uses internal reflection from within the quartz substrate to achieve high-efficiency acousto-optic diffraction of the laser light. The use of a CCD camera coupled with a frame grabber and a computer with image calculator software establishes an imaging system for large-area, real-time visualization, recording, accurate measurement, and analysis of vibrational modes of SAW devices. These methods are part of an effort to determine the relationship between acceleration sensitivity and transverse variations in the acoustic-mode shape in SAW resonators. Use of the system in imaging a 98 MHz SAW device is presented as an example     

某低温系统实时故障诊断专家系统的研究与应用

介绍了某低温系统在线故障诊断专家系统,叙述了诊断系统的基本结构及故障监测、预测和故障处理。系统使用delphi开发工具,利用各运行参数之间的逻辑关系作为推理依据,运用经验知识和理论知识相结合作为故障诊断的理论依据,对整个低温系统进行状态监测和故障诊断,指导操作人员排除故障。     

A CAMAC based real-time noise analysis system for nuclear reactors

A CAMAC based real-time noise analysis system was designed for the TRIGA MARK II nuclear reactor at the Institute for Nuclear Energy, Istanbul. The input analog signals obtained from the radiation detectors are introduced to the system through CAMAC interface. The signals converted into digital form are processed by a PDP-11 computer. The fast data processing based on auto/cross power spectral density computations is carried out by means of assembly written FFT algorithms in real-time and the spectra obtained are displayed on a CAMAC driven display system as an additional monitoring device. The system has the advantage of being software programmable and controlled by a CAMAC system so that it is operated under program control for reactor surveillance, anomaly detection and diagnosis. The system can also be used for the identification of nonstationary operational characteristics of the reactor in long term by comparing the noise power spectra with the corresponding reference noise patterns prepared in advance.     

车载润滑油污染度实时检测系统设计

针对润滑油严重污染会导致汽车动力设备故障的问题,设计润滑油污染度实时检测系统。该系统采用C8051F500单片机作为主控芯片,利用光电传感器TCS3414实现润滑油污染度的实时检测。同时引入电磁塞设计,使得系统可以间接检测润滑油中金属颗粒污染度,从而评估汽车的磨损状况。试验结果表明:检测系统能够有效检测润滑油中的整体污染度以及监测汽车动力设备的磨损情况,当光源电压高于6 V时,系统几乎不受电源电压变化的影响。该检测系统具有良好的实用价值。