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针对有线组网方式布线复杂、维护困难的问题,提出了一种基于ZigBee无线组网技术和嵌入式Web服务器,对家庭环境进行远程监控的实现方法。采用温湿度传感器DHT11实现温湿度的采集,烟雾传感器MQ2监测厨房烟雾浓度是否超标,人体红外感应模块实现家庭安防。并且通过红外技术控制空调和加湿器或热水器的打开或关闭.从而实现对温度和湿度的调节,对热水器的远程控制。实验结果表明,该系统体积小、功耗低、运行稳定,具有一定的实际意义。 相似文献
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Linoh A. Magagula H. Anthony Chan Olabisi E. Falowo 《Wireless Communications and Mobile Computing》2012,12(16):1414-1428
Next generation wireless networks (NGWN) will be an integration of heterogeneous wireless access networks that will interwork over an IP‐based infrastructure. This all‐IP vision has led to the development of handover mechanisms to support seamless mobility for active network services among the different interworking wireless networks in order to ensure network access ubiquity in NGWN. These handover mechanisms need to ensure that mobile devices continue to receive ongoing communication without any noticeable disruption during handover events among the heterogeneous networks. This paper gives a qualitative and quantitative review of current handover approaches of IP mobility management protocols for NGWN with an objective to introduce a new way of further optimizing the handover performance. In particular, the paper focuses on handover approaches of mobile IPv6 (MIPv6) based mobility management protocols. Thus, the need, benefits, and limitations of these handover approaches are explored. Thereafter, dynamic handover coordination is introduced as a new viable solution that exploits the benefits and mitigates the limitations of these handover approaches hence improving handover performance in terms of handover delay, packet loss, and signaling overhead. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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以一种火箭弹红外成像导引头位标器为研究对象,利用ANSYS建立了位标器的有限元分析模型并分析了位标器机械结构部分的可靠性,首先模拟了导引头位标器在极限温度下-10℃和50℃的热力分析,然后对位标器进行了模态分析并得到了几种固有频率,最后根据位标器的冲击要求进行了冲击响应分析,计算结果表明导引头的机械结构的可靠性满足精度要求. 相似文献
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为了能实现家用无线防盗的目的,设计了一种基于Zigbee技术和红外探测技术的家用无线防盗报警系统。系统总体主要由传感器节点模块、协调器节点模块和报警模块构成。选用CC2430作为主控芯片,对硬件系统中的传感器节点模块、协调器节点模块和报警模块进行了设计,并给出了协调器模块和传感器模块的程序流程图。试验结果表明,系统运行稳定可靠,安装方便,功耗低,具有较高实用价值。 相似文献
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基于Z—Stack的无线温湿度采集系统 总被引:2,自引:0,他引:2
针对现有的有线温湿度采集系统,存在系统布线复杂、维护困难、成本高等问题,提出一种基于Z-Stack的无线温湿度采集系统设计方法。设计采用CC2430射频芯片及SHTll数字温湿度传感器,在ZigBee协议栈的基础上进行开发。阐述了系统的原理,节点的硬件设计和软件设计。实验表明,该系统能够稳定可靠的实现温湿度数据的采集。 相似文献
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