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This paper proposes a novel approach centered on multimedia internetworking for the development of Distributed Virtual Instruments (DVI). Multimedia internetworking refers to network infrastructures, protocols, models, applications and techniques being currently deployed over the Internet to support multimedia applications, e.g., videoconferencing, video-on-demand, shared workspaces. It is applied to broaden the concept of virtual instrument and enable new measurement patterns leveraging efficiency and interactivity. A DVI is a virtual instrument split into possibly multiple and independent parts, sender and receiver, which are linked by real-time continuous media and control streams. Senders and receivers are built by using open, composable and modular components based on a time sensitive actor framework and glued by multimedia middleware. A prototype is described to demonstrate the potential and the benefits of the proposed approach. 相似文献
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采用LabWindows/CVI开发的计算机通用数据采集系统EasyDQA’99可用于应变、温度、机械振动等测量。NI-DAQ的双缓冲区技术asyDAQ’99还具有常规数据采集系统所不具备的功能,如在数据采集的过程中执行实时处理,显示,写盘,等。 相似文献
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基于LabVIEW的一种新型过程控制方法及实现 总被引:7,自引:0,他引:7
基于LabVIEW开发了控制器传递函数模块,提出了一种新的过程控制方法,使传递函数形式的控制器不仅使用在仿真实验中,而且运用于工程实际。基于该方法和NI多功能卡实现了对以液位装置为例的工业被控对象的过程控制。实验结果良好,证明了该方法的可行性及有效性。 相似文献
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飞行试验实时监控中,颤振等高采样数据通常采用时间历程曲线绘制的方式进行分析与故障判断,这对数据绘制的实时性、准确性以及曲线绘制长度等都提出了较高的要求;文章在对NI PCI-6713板卡的模拟输出功能进行详细讨论和比较验证的基础上,对基于NI-DAQ的曲线绘制进行了算法研究和软件设计,实现了在监控客户端的16路高采样数据实时曲线绘制与打印;经试验验证,采用该方法绘制的高采样数据曲线准确可靠,满足监控要求,能有效保障飞行试验的正常进行. 相似文献
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