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对目前路边停车场需要人工值守的缺点,提出一种采用地磁、地锁、LoRa和NB-IoT多种技术结合的无人值守云系统.全面阐述了系统方案,设备选型,系统框架,通讯方案,难点功能等内容.采用LoRa和NB-IoT相结合的通讯方案解决了类似系统单独用一种通讯方案时存在信号不畅、功耗较高和通讯费用高的问题.基于地磁和地锁的创新设计... 相似文献
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《工程（英文）》2017,3(4):460-466
Under intense environmental pressure, the global energy sector is promoting the integration of renewable energy into interconnected energy systems. The demand-side management (DSM) of energy systems has drawn considerable industrial and academic attention in attempts to form new flexibilities to respond to variations in renewable energy inputs to the system. However, many DSM concepts are still in the experimental demonstration phase. One of the obstacles to DSM usage is that the current information infrastructure was mainly designed for centralized systems, and does not meet DSM requirements. To overcome this barrier, this paper proposes a novel information infrastructure named the Internet of Energy Things (IoET) in order to make DSM practicable by basing it on the latest wireless communication technology: the low-power wide-area network (LPWAN). The primary advantage of LPWAN over general packet radio service (GPRS) and area Internet of Things (IoT) is its wide-area coverage, which comes with minimum power consumption and maintenance costs. Against this background, this paper briefly reviews the representative LPWAN technologies of narrow-band Internet of Things (NB-IoT) and Long Range (LoRa) technology, and compares them with GPRS and area IoT technology. Next, a wireless-to-cloud architecture is proposed for the IoET, based on the main technical features of LPWAN. Finally, this paper looks forward to the potential of IoET in various DSM application scenarios. 相似文献
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产销差高、运营成本高是供水企业最大的痛点,为此供水企业早就开始使用智能水表的探索。本文首先梳理了智能水表的发展之路,从有线到无线,从短距离通信到长距离通信,从非运营商网络到运营商网络,比较得出目前的NB-IoT技术是理想的技术,然后设计基于NB-IoT的智能水表的网络架构、智能水表的工作方式,最后分析了基于NB-IoT的智能水表的的优势。 相似文献
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This paper presents a novel distributed data analytic architecture, and corresponding algorithms that apply to infrastructure anomaly detection. The proposed method mainly focuses on smart water networks, demonstrating that the highest possible sensor rate analytic performs at on-edge nodes without requiring the whole date to send back to the server. This approach saves communication costs and lengthens the lifetime of the battery-powered nodes. A complex set of tasks is developed on a single-core Intel Curie processor, Arduino101 and the raw sensor data is compressed using a customized Lempel–Ziv compression algorithm tailored to resource-constrained embedded systems. The compression rate figures are then analyzed but only the compressed data which is associated with the anomalous condition is sent back to the server by means of a LoRa platform. The developed system is evaluated experimentally and the results verify the high resource utilization. 相似文献
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为实现采煤机滚筒智能调高与远程控制记忆截割煤等功能,需获取采煤机精确姿态信息。设计一种基于LoRa技术通信的采煤机姿态感知系统。考虑井下工作条件恶劣、通信干扰因素多等特点,该系统采用抗振倾角传感器精确获取采煤机姿态信息,利用LoRa技术并结合滤波算法来提高系统的通信距离,实现采煤机滚筒智能调高和记忆截割煤的远程控制。通过在黄陵1#煤矿井下进行实际测试,结果表明,该系统在井下恶劣环境中获取的采煤机姿态信息精确,传输距离可达140 m,可以满足工作面远程控制需求。 相似文献
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文章结合北京新机场高速公路照明工程实例,阐述了常规照明控制系统的现状,分析了基于新兴的LoRa物联网技术智能照明控制方案的系统原理和系统构成、系统在高速公路智能照明控制领域的应用以及系统应用能达到的节能和管理效益的提升效果,并对系统的扩展应用前景做了研究分析. 相似文献
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本文基于现在发展迅猛的LoRa及物联网技术,提出了一种基于LoRa协议的智能中波台站物联网监控系统设计方案.该方案以LoRa网络实现系统感知层设计,基于简单的星型组网架构,构建低功耗广域网智能中波台站物联网监控系统,实现对中波台站内外环境相关数据采集及相关设备的远程控制. 相似文献
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为解决野外火场救援消防员定位安全问题,提出一种基于远距离无线电(LoRa) 技术的森林消防协同定位算法。针对 野外救援存在的非视距(NLOS) 问题,提出一种修正协方差矩阵的扩展卡尔曼滤波协同定位算法,利用LoRa协同网络内部移 动节点之间的测距信息辅助定位,建立系统方程并根据当前时刻的状态滤波值二次更新误差协方差修正偏离误差;其次提出 改进的动态中值滤波算法,采用动态窗口筛选处理定位扰动数据,二次优化定位轨迹曲线。仿真实验结果表明,所提算法极 大地协同了整个网络资源,在室外多NLOS, 通信质量差的环境下定位精度可达0.49 m, 为森林消防安全解救提供了一种可 靠的解决方案。 相似文献