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基于小型操作系统RTX51-Tiny设计实现的无线终端 总被引:1,自引:0,他引:1
为了使分布在不同位置的现场控制器联系在一起,达到更广区域的监视和控制,本文介绍了一种使用小型多任务实时操作系统RTX51-Tiny开发的无线控制终端,通信模块使用了nRF401芯片,它与微控制器相连的部分只是简单的串口,此模块用来与下位机无线通信实现数据交换。本文描述了硬件部分和软件部的设计过程,给出了硬件电路图、软件程序框图、部分串口通信程序。此系统具有测点多、便于扩展、抗干扰性强等优点,并通过试验取得了良好效果,为构建高性能的实时数据平台起到了借鉴作用。 相似文献
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基于Spardan3系列FPGA芯片X-C3S5E和DM12864M显示器,设计了一种伺服控制实时显示系统。该系统通过异步串行接口RS232接收电机编码器返回的数值,在显示器上实时显示控制信息。主要包括硬件设计和软件设计;给出了FPGA与液晶显示器LCD12864的硬件接口,着重介绍了软件设计,将串口通信、数据整合、除法器、数据选择和显示器都进行了模块化,方便了调试;在模块中同时采用了状态机,使时序更加清晰。实验结果表明:该系统占用资源少,显示效率高,稳定性好,通用性好,可以满足伺服控制的实时显示的要求。 相似文献
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A handheld data acquisition (DAQ) system was designed and built for use in an undergraduate engineering course. The system is based on a PocketPC computer and a low-cost serial DAQ card. The DAQ system runs under WindowsCE, an embedded real-time operating system. The DAQ hardware is supported by a free development system and custom software that allows applications to be tested under emulation with simulated I/O before being downloaded to the DAQ hardware. Several lab experiments were developed that complement the DAQ hardware. 相似文献
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在基于单片机的步进电机控制驱动系统中,为了保证电机平稳运行,提高系统的实时调速响应性,一直是设计追求的目标。针对以上目标,该研究在硬件设计上采用专用键盘扫描与数码管驱动芯片ZLG7290和I2C总线技术,软件设计上采用三级中断优先级软件结构,使得控制系统很好地达到了设计目标。在一种蠕动泵控制驱动系统的应用中,证明系统具有调速实时性好和运行平稳的特性。该文所提出的一整套设计方法具有一定的理论和实用参考价值。 相似文献
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交通信息采集的UDP通信方法 总被引:5,自引:1,他引:5
针对道路交通控制系统中对大量数据的实时传输需求,提出了一种基于UDP(用户数据报协议)的以太网通信的实现方案,采用DSP芯片TMS320F2812作为微处理器,通过连接以太网控制器CS8900A来实现系统与以太网的接口功能.主要介绍了系统的硬件和软件设计,阐述了采用UDP协议在实时通信中的优势,并通过实验实现了相应的数据实时传输功能.结合相关道路交通理论,对道路现场进行了模拟,设计了相应的交通应用数据,并通过上位机界面实现了对交通状态的远程监控.实验结果证明该方案完全适用于该系统对于实时通信的需求. 相似文献
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This paper discusses the development of a real-time digital control system with hardware in the loop (HIL) for modeling and controls education. This environment requires software tools by MathWorks, Inc. and a C++ compiler. The hardware tools include an off-the-shelf data acquisition card and the desired hardware to be controlled. The use of a single environment for dynamic system analysis, control law development, simulation evaluation, and final implementation on an HIL system has many educational advantages as compared to multienvironment settings. This host-target real-time environment is implemented and demonstrated by controlling a nonlinear, open-loop unstable, and time varying custom-built magnetic levitation device. The values of any parameter (control law, reference trajectory) in the Simulink model can be changed dynamically on the host computer without recompiling the control code, and their effects are observed in real-time on the HIL system. This environment allows for extensive experimentation, development of linear and nonlinear controllers, and performance comparison with HIL as shown in the presented examples. The educational features of this environment are presented throughout the paper and were verified in a class setting. 相似文献
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基于矢量控制IM实时控制的dSPACE实现 总被引:3,自引:0,他引:3
dSPACE是基于Matlab/Simulink半实物仿真系统开发的软硬件工作平台,具有实时性强,可靠性高,扩充性好等优点。在分析矢量控制基本原理的基础上,利用dSPACE的快速控制原型方式和dSPACE系统的软硬件环境,在Matlab/Simulink中建立了三相感应电机(InductionMotor,简称IM)的实时控制系统;并对控制参数进行了在线调参,改善了实际性能。实验结果表明,采用dSPACE平台可以快速完成对矢量控制IM速度控制系统的研究和开发,缩短了控制系统的开发周期,获得了满意的效果。 相似文献
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介绍了如何定制一个适合变电站自动化设备中使用的嵌入式Linux系统,Linux是一个成熟的开放源码的现代操作系统,具有极好的硬件兼容性和软件可裁减性,适合应用在电力系统的变电站测控和通信等软件实时领域,一个实用的最小化Linux主要包括引导程序,初始化程序,设备文件,运行库以及在此基础上构建的用户应用程序,根据需要也可以加上适当的图形用户界面。给出了X86-PC体系下嵌入式Linux和MiniGUI Windows界面的构建过程,并对它们使用的GPL协议进行了解释。 相似文献
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《Education, IEEE Transactions on》1982,25(4):115-119
This paper summarizes the design, development, and implementation of an eight station microcomputer laboratory based on the DEC LSI-11 processor. The objectives and requirements of the facility are outlined as background for understanding the system design. Other sections are devoted to hardware, software, and courseware development for the laboratory. Hardware includes the LSI-11 processor, 16 channels of A-D input (eight channels differential), two channels of analog output, a minifloppy disk drive, a CRT terminal, and serial data links to an IBM 370 system. Software includes a custom-built monitor for the LSI-11, a cross assembler, simulator, linker, and down-line loader which run on the IBM 370, and special A-D and D-A routines. Courseware includes ten self-paced laboratory exercises, five real-time monitoring and control experiments, and a series of TV tape cassettes. Hardware plans, software listings, and class materials are available to interested readers by writing to the authors. 相似文献
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针对于传统的微机防误闭锁系统表现出实时性差,低可靠性的不足,设计并实现了一种基于双总线网络的在线式防误微机闭锁系统,介绍了系统软硬件的设计,论述了其工作原理。实践证明该系统具有较好的实时性和可靠性,同时,实现了对现场防误操作的远程控制。 相似文献
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Zupancic B. Karba R. Matko D. Atanasijevic-Kunc M. 《Education, IEEE Transactions on》1993,36(3):340-347
Educational aspects of CAD supported real time control are discussed. The historical development of the equipment and appropriate software concerning laboratory exercises in the field of real-time control is briefly described. The hardware and software equipment used in the education process at Ljubljana University is briefly described. Emphasis is given to the equipment developed: a hydraulic-thermal pilot plant, two CACSD program packages with their real-time capabilities, and a special program for real time control in addition to emphasizing their connection in a powerful educational system. Some typical exercises from undergraduate courses, e.g., some experiments on the connection of analog and digital computer, identification of the hydraulic process and its level control, as well as some exercises from a graduate course, e.g., the implementation of adaptive digital filtering in real-time are described. Some difficulties encountered when applying the theory to practical problems are discussed 相似文献
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设计了一种基于nRF905的温湿度无线监测预警系统.以AT89S51单片机为核心,结合温湿度采集模块和nRF905无线收发模块,给出了系统设计结构框图和串行通信接口等硬件设计电路,利用Visual Basic结合Access开发了上位机温湿度智能控制管理平台,通过软件用户界面显示了温湿度数据及介绍了温湿度预警控制功能,并给出了利用数据库实现温湿度数据的存储处理及智能控制的应用实例.试验结果表明,该系统能实现温湿度的实时精确监测、数据无线收发和温湿度预警等功能,在生态环境监测领域具有广泛的应用前景. 相似文献
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设计了一种基于MODBUS协议的能对多通道(24路)进行数据采集、存储与显示的实用性较高温度的数据采集系统。介绍了MODBUS协议及RS~485通讯,并给出了采集系统的工作原理及软件、硬件设计和功能实现的方法。系统主要是为了提高数据采集系统的实时性和可靠性,这种基于MODBUS的温度数据采集系统应用于发电厂,为温度数据的实时采集与控制提供了一种实用的联网技术方案,确实增加了数据采集系统的实时性和稳定性,对目前数据采集系统的发展起到了推动和促进作用。 相似文献
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针对人们对高质量生活的诉求以及现有台灯无法满足智能家居的应用需求,设计并制作了一种基于STM32实时操作系统的多功能智能台灯.本设计以意法半导体公司的CoteX-M3内核微控制器STM32为主控制器,通过搭建硬件电路以及编写相应软件程序,实现智能台灯的灯光调节、蓝牙短距离通信、人机互动,电机实时控制、传感器测室温和显示等功能,使得台灯控制方式更加方便,更加智能化.实验表明,所设计的智能台灯采用STM32对台灯系统进行多任务管理,增强了系统的稳定性,提高了系统的实时性. 相似文献