共查询到17条相似文献,搜索用时 171 毫秒
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基于ZigBee的煤矿监控网络节点设计 总被引:3,自引:1,他引:2
针对矿用监控设备采用有线方式传输信号存在的弊端,煤矿实时监控采用基于Zigbee的无线传感器网络技术.根据无线传感器网络工作原理和节点体系架构,设计了以CC2430为核心的传感器网络节点.该节点装置能够完成瓦斯浓度监测、井下人员的实时信息采集和定位等,并详细给出了这种传感器节点的硬件设计和软件流程. 相似文献
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基于单片机井下瓦斯报警监测系统设计,采用AT89C52单片机作为核心控制模块,并带有MQ-5传感器实现实时瓦斯浓度的监测,实现自动报警功能,同时利用无线传感器nRF905发送、接收数据,有效防止和避免瓦斯燃烧或爆炸的恶性事故发生,完成了井下瓦斯浓度的无线监测。 相似文献
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瓦斯事故是威胁煤矿安全生产的主要因素,目前煤矿主要以有线监控系统为基础进行瓦斯监测。针对其布线困难、易损毁、成本高等缺点,文章提出了一种基于VxWorks的应急无线瓦斯浓度采集系统,用于对井下瓦斯浓度等环境参数远程采集,为井下救援提供有力数据保障。该系统包含采集前端和接收设备,实际使用中,使用特定布放装置进行采集前端的定点布放,采集前端采集环境参数信息,通过ZigBee网络传输至接收终端进行分析、显示与存储。文章重点介绍了该采集系统工作原理及采集前端的硬件组成和软件实现。实验表明,在模拟环境中,采用本方案可以有效可靠地完成无线数据实时采集任务。 相似文献
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从人员安全的角度出发,通过使用传感器对矿井温湿度、瓦斯气体浓度以及矿工位置的实时监测,并利用成熟的无线传感网络通信技术和工业无线通信设备,构成煤矿综合监测系统,实现对煤矿井下作业的安全保证。 相似文献
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针对矿井中安全监控设备使用有线方式传榆信号存在的弊端,分析了在井下环境中采用ZigBee无线网络技术的可行性,介绍一种以CC2530无线单片机为ZigBee网络核心单元的矿井瓦斯浓度监测系统,详述其设计原理和实现方法,并给出网络节点的软硬件设计方案.该系统实时监测矿井各处瓦斯浓度,实时收集并传输数据.测试结果表明,该系统实时性高,功耗低,实现了在无线环境下对矿井中瓦斯浓度的有效监测. 相似文献
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基于博弈论的井下监测网QoS路由算法研究 总被引:1,自引:0,他引:1
构建煤矿井下无线视频监控系统可有效弥补有线监控系统的不足,以无线多媒体传感器为网络节点设计了煤矿井下无线视频监控系统,针对传感器存在潜在的自私性特点,引入博弈理论思想,建立一种无线多媒体传感器网络QOS路由的博弈模型,并将其融入到路由协议中,提出了一种博弈路由协议,仿真实验表明能够有效均衡节点能量消耗,克服传感器自私性... 相似文献
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随着我国经济的快速发展,由室内环境问题而引起的人口健康问题越来越突出,已经引起广大人民群众的广泛关注。本文提出一种基于ZigBee的无线传感器网络在室内环境监测方案,对系统的软硬件进行了研究与设计。以CC2430芯片为无线节点的检测与信息处理核心,与现代传感器模块相结合,构成无线传感器网络终端检测子节点;采用RS232标准的方式与中心节点进行信息通讯,使现场循环检测数据能实时传送给中央监控计算机,实现室内环境的实时监测。结果表明,系统功能维护容易、扩展方便、布网灵活、施工成本低,为室内环境现代化管理奠定了基础。 相似文献
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In this paper, multicarrier code division multiple access (MC-CDMA) modulation is adapted to constitute wireless sensors to improve the monitoring performance of wireless sensor networks (WSNs) for underground coal mine. A subcarrier phase compensation algorithm based on selective mapping (SLM) is proposed to reduce the relatively high PAPR of MC-CDMA signal. To further improve the monitoring performance of the underground MC-CDMA WSNs, a joint cross-layer transmission with time–frequency coded cooperation hybrid automatic repeat request (HARQ) is also proposed. The proposed cross-layer transmission combines time–frequency coded cooperation of physical layer with HARQ of media access control (MAC) layer. In the proposed transmission, the cooperative sensor utilizes time–frequency coded cooperation method to retransmit the monitoring information of source sensor at each retransmission time to obtain the coding gain and spatial diversity gain. Simulation results show that the proposed joint cross-layer transmission for underground coal mine MC-CDMA WSNs based on SLM phase compensation has significantly reduced the PAPR of MC-CDMA signal and improved the monitor performance of the coal mine MC-CDMA WSNs. 相似文献
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Debugging in distributed environments, such as wireless sensor networks (WSNs), which consist of sensor nodes with limited resources, is an iterative and occasionally laborious process for programmers. In sensor networks, it is not easy to find unintended bugs that arise during development and deployment, and that are due to a lack of visibility into the nodes and a dearth of effective debugging tools. Most sensor network debugging tools are not provided with effective facilities such as real‐time tracing, remote debugging, or a GUI environment. In this paper, we present a hybrid debugging framework (HDF) that works on WSNs. This framework supports query‐based monitoring and real‐time tracing on sensor nodes. The monitoring supports commands to manage/control the deployed nodes, and provides new debug commands. To do so, we devised a debugging device called a Docking Debug‐Box (D2‐Box), and two program agents. In addition, we provide a scalable node monitor to enable all deployed nodes for viewing. To transmit and collect their data or information reliably, all nodes are connected using a scalable node monitor applied through the Internet. Therefore, the suggested framework in theory does not increase the network traffic for debugging on WSNs, and the traffic complexity is nearly O(1). 相似文献
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CC1010芯片在无线传感器网络节点设计中的应用 总被引:10,自引:2,他引:8
无线传感器网络,可以在一些特殊的场合实现信号的采集、处理和发送.在简要介绍无线传感器网络节点结构的基础上,对Chipcon公司开发的CC1010射频芯片的功能特点进行了研究,结合其工作原理与应用电路,阐述了它在无线传感器网络节点硬件设计中的应用. 相似文献