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本文介绍了一种基于LonWorks总线的智能安全防范报警节点的工作原理.硬件电路和软件实现。这种节点采用Host-Based结构.以MC68332为主处理器.以神经元芯片3150为通信协处理器.具有烟火感探测.煤气泄漏探测和防盗报警的功能。它连接到LonWorks网络上,一旦发生盗情,火灾.煤气泄漏.能立即发出警笛声.同时将警情通过LonWorks总线传递到其它LonWorks节点和监控中心。 相似文献
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李丹美 《仪表技术与传感器》2002,(9):47-48,54
介绍了一种采用ShortStack技术主从式CPU结构的LonWorks控制节点的设计,使用该技术可以谁地在现有智能仪表、控制器上增加LonWorks网络接口。 相似文献
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基于LonWorks现场总线技术,提出建立控制网络系统(CNS),对它的实现策略进行了探讨,并以散热器芯子烘焊自动线控制系统中主烘腔的温度控制为应用对象,建立了基于LonWorks节点的主烘腔温度模糊控制系统,分散的节点不仅有效地实现了温度模糊控制的功能,而且使系统整体性能得到了提高。 相似文献
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一种应用LONWORKS控制模块的现场智能节点的设计 总被引:1,自引:0,他引:1
本文首先简要地介绍了LonWorks现场总线技术以及LonWorks控制模块 ,在此基础上提出了一种LonWorks控制模块与MCS - 5 1单片机并行通信节点的组成原理及其设计与实现 相似文献
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针对住宅智能化,介绍了以LonWorks总线为核心的智能住宅系统,设计了智能节点和人机界面.智能节点主要有红外线传感器和烟感探测器,用于防盗、防火.利用LNS开发工具提供的DDE数据源,用VB开发人机管理界面.LonWorks总线技术开发周期短,通信效率和可靠性高. 相似文献
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Lon Works节点与PC串行通信的研究与设计 总被引:1,自引:0,他引:1
本文介绍了一种基于神经元芯片的LonWorks节点与EIA-232C接口的方法,设计了与PC机实现异步串行通信的LonWorks节点,给出了具体的硬件电路和软件设计方案,并指出了其在LON网络通信中的实际应用前景. 相似文献
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Hyeon-cheol YANG Yoon-sup KIM Seong-soo LEE Sang-keun OH Sung-hwa KIM Doo-won CHOI 《测试科学与仪器》2010,1(3)
Surveillance system using active tracking camera has no distance limitation of surveillance range compared to supersonic or sound sensors. However, complex motion tracking algorithm requires huge amount of computation, and it often requires expensive DSPs or embedded processors. This paper proposes a novel motion tracking unit based on different image for fast and simple motion tracking. It uses configuration factor to avoid noise and inaccuracy. It reduces the required computation significantly, so as to be implemented on Field Programmable Gate Array(FPGAs) instead of expensive Digital Signal Processing(DSPs). It also performs calculation for motion estimation in video compression, so it can be easily combined with surveillance system with video recording functionality based on video compression. The proposed motion tracking system implemented on Xilinx Vertex-4 FPGA can process 48 frames per second, and operating frequency of motion tracking unit is 100 MHz. 相似文献
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设计了一种基于ZigBee无线传感器网络(WSN)技术的绿地墒情监测节点。为了提高节点硬件的可靠性及降低传感器电路的总体功耗,创新性地采用了模块化设计,将无线射频模块和数据处理模块分离,使其通过不同接口与传感器底板连接;传感器底板可接入8路土壤湿度传感器和8路温度传感器,并具备分时开启功能,节点可以在长达3个月的时间内运行于无人监守的环境中。测试结果显示该节点实际工作状态下的平均电流为52.89 mA,睡眠时的平均电流为10μA,比同类产品节省功耗30%左右,可以用于构建监测绿地墒情的低功耗无线传感器网络。 相似文献
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产品协同设计过程建模方法的研究 总被引:2,自引:0,他引:2
协同工作关联图(MCM)和活动状态联接图(CLM)是协同工作过程建模新方法。介绍了协同工作关联图和活动状态联接图的概念、组成;针对该建模方法在工作流描述方面的不足,在原有的基础上,对MCM增加了开始、终止和多实例化活动等建模元素,对CLM增加了中断、补偿状态等建模元素;并给出了电控柴油机微粒袋滤器系统的设计过程模型实例。 相似文献
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Foreground moving object detection is an important pocess in various computer vision applicatipons such as intelligent visual sur-veillance,HCI,object-based video compression,etc.One of the most successful moving object detection algorithms is based on Adaptive Gaussian Mixture Model (AGMM).Although AGMM-based object detection shows very good performance with respect to object detection accuracy,AGMM is very complex model requiring lots of floating-point arithmetic so that it should pay for expensive computational cost.Thus,direa implementation of the AGMM-based object detec-tion for embedded DSPs without floating-point arithmetic HW support cannot satisfy the real-time processing requirement.This paper pre-sents a navel real-time implementation of adaptive Gaussian mixture model-based moving object detection algorithm for fixed-point DSPs.In the proposed implementation,in addition to changes of data types into fixed- point ones,magnification of the Gaussian distribution tech nique is introduced so that the integer and fixed-point arithmetic can be easily and consistently utilized instead of real number and floating-point arithmetic in processing of AGMM algorithm.Experimental re-sults shows that the proposed implementation have a high potential in real-time applications. 相似文献