共查询到20条相似文献，搜索用时 374 毫秒
1.
本文提出基于无线传感器网络技术的煤矿安全监测系统,阐述了无线传感器网络体系设计及节点的硬件和软件设计,选择了基于IEEE802.15.4标准的ZigBee技术作为无线传感器网络的通信方案,充分利用无线传感器网络的优点,实现对井下各种环境及生产参数全方位、实时监测,尽可能地减少煤矿安全生产隐患,更好的为安全生产服务。 相似文献
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为推动红色旅游,急需对原中央苏区革命遗址进行保护。提出一种部分节点移动的无线传感器网络,构建一个对革命遗址有效保护的环境监测自动化系统,给出了系统的总体结构。在路由通信方面采用贪婪地理路由协议进行路由选择,对网络拓扑变化有较好的自适应性,实现了无线传感器网络能量高效的自适应信标交换和负载均衡贪婪转发策略。仿真实验表明,该网络减少了数据分组的丢失,缓解了在高业务量情况下的拥塞程度,具有较高的实用价值和应用前景。 相似文献
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将UWB精确定位功能和TOA/AOA混和定位技术相结合,应用于无线传感器网络簇内节点定位中,为无线传感器网络分簇路由协议提供可靠的位置服务。仿真结果表明,其UWB定位精确度较高,适合簇内节点的相对定位。 相似文献
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《Journal of The Franklin Institute》2017,354(11):4457-4480
Due to the hopeful application of gathering information from unreachable position, wireless sensor network creates an immense challenge for data routing to maximize the communication with more energy efficiency. In order to design the energy efficient routing, the optimization based clustering protocols are more preferred in wireless sensor network. In this paper, we have proposed competent optimization based algorithm called Fractional lion (FLION) clustering algorithm for creating the energy efficient routing path. Here, the proposed clustering algorithm is used to increase the energy and lifetime of the network nodes by selecting the rapid cluster head. In addition, we have proposed multi-objective FLION clustering algorithm to develop the new fitness function based on the five objectives like intra-cluster distance, inter-cluster distance, cluster head energy, normal nodes energy and delay. Here, the proposed fitness function is used to find the rapid cluster centroid for an efficient routing path. Finally, the performance of the proposed clustering algorithm is compared with the existing clustering algorithms such as low energy adaptive clustering hierarchy (LEACH), particle swarm optimization (PSO), artificial bee colony (ABC) and Fractional ABC clustering algorithm. The results proved that the lifetime of the wireless sensor nodes is maximized by the proposed FLION based multi-objective clustering algorithm as compared with existing protocols. 相似文献
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本文提出了基于ZigBee技术的面向农作物的无线传感器网络监测系统的设计方案,其中硬件子系统包括四大部分：处理器模块、无线通信模块、传感器模块和电源模块;软件子系统涉及开发平台Tiny0S系统、CC2420驱动设计、串口和内网通信程序设计和传感器数据采集模块设计。系统具有良好的灵活性、可维护性和可扩展性,同时系统模块化、开放式的结构使系统具有良好的可移植性。 相似文献
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本文在研究传统的DV-Hop3D算法基础上提出了一种新无线传感器网络定位算法。新算法在算法的第一阶段设置了跳数阈值参数以减小通信开销,并且在算法的第二阶段用可选择的平均跳距代替固定的平均跳距来计算未知节点到锚节点的距离,最后用Matlab7.1进行了仿真。仿真结果表明,该改进算法可明显提高节点定位精度,并且能有效降低网络通信量。 相似文献
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针对偏远地区水情数据远程监测的实际需求,文章进行了基于zigbee协议和CDMA通信技术的远程数据采集传输系统的设计开发。以支持zigbee协议的芯片CC2530来构建传感器节点和中心节点,以CDMA无线通信模块构建能与internet进行数据传输的网关。传感器节点采用星型拓扑结构组成无线传感网络后,采集数据传给中心节点,再通过ARM处理器驱动CDMA模块实现数据的远程传输。该监测系统低功耗、易组网、易安装,适合大区域的远程无线实时监测。 相似文献
8.
在无线传感器网络中,由于传感器节点的电池不能更换.因此要想办法节省节点的能量以延长无线传感器网络的寿命.高效率的数据融合方式将来自多传感器节点的数据进行综合处理,得出更为准确完整的信息,从而有效地节省了网络资源. 相似文献
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在分析无线通信协议的基础上,对医疗呼叫系统中节点的软硬件两个部分进行设计和研究,系统主要包括处理器模块（选用TMS320VC5402芯片）、音频采样模块（选用TLV320AIC23芯片）、ZigBee无线通信模块（选用CC2430芯片）3个模块。 相似文献
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《Journal of The Franklin Institute》2023,360(7):5211-5241
Radio tomographic imaging (RTI) has wide applications in the detection and tracking of objects that do not require any sensor to be attached to the object. Consequently, it leads to device-free localization (DFL). RTI uses received signal strength (RSS) at different sensor nodes for imaging purposes. The attenuation maps, known as spatial loss fields (SLFs), measure the power loss at each pixel in the wireless sensor network (WSN) of interest. These SLFs help us to detect obstacles and aid in the imaging of objects. The centralized RTI system requires the information of all sensor nodes available at the fusion centre (FC), which in turn increases the communication overhead. Furthermore, the failure of links may lead to improper imaging in the RTI system. Hence, a distributed approach for the RTI system resolves such problems. In this paper, a consensus-based distributed strategy is used for distributed estimation of the SLF. The major contribution of this work is to propose a fully decentralized RTI system by using a consensus-based alternating direction method of multipliers (ADMM) algorithm to alleviate the practical issues with centralized and distributed incremental strategies. We proposed distributed consensus ADMM (DCADMM-RTI) and distributed sparse consensus ADMM (DSCADMM-RTI) for the RTI system to properly localize targets in a distributed fashion. Furthermore, the effect of quantization noise is verified by using the distributed consensus algorithms while sharing the quantized data among the neighbourhoods. 相似文献
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Francis E.H. Tay D.G. Guo L. Xu M.N. Nyan K.L. Yap 《Journal of The Franklin Institute》2009,346(6):531-542
This paper proposes a remote vital signs monitoring system, which integrates wireless body area network (WBAN) and personal digital assistant (PDA) phone technology. Four different physiological signs, e.g., ECG, SpO2, temperature and blood pressure, can be continuously acquired or derived from two wireless sensor nodes—ECG sensor and integrated SpO2/temperature sensor. Once sentinel events happened or the request to real-time display vital signs is confirmed, all physiological signs and critical indices will be immediately transmitted to patient's PDA phone through Bluetooth and further relayed to doctor's PDA phone through global system for mobile communication (GSM) technology. A prototype of such system has been successfully developed and implemented, which will offer high standard of healthcare with a major reduction in cost for our society. 相似文献
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混沌粒子群算法在WSN覆盖优化中的应用 总被引：1，自引：0，他引：1
研究WSN覆盖优化方面的问题,提高无线传感网络通讯效率。针对无线传感网络节点分布不均匀或者节点失效时,WSN覆盖区域会出现重叠或者指定区域没有被覆盖,造成无线传感网络通讯效率下降的问题,提出了利用一种混沌粒子群算法,根据无线传感网络相关参数和条件建立数学模型,利用优化处理方式对其进行优化,提高了通讯效率。实验证明,利用混沌粒子群算法进行WSN覆盖优化,可以提高无线传感网络优化效率,取得了令人满意的效果。 相似文献
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介绍了基于GPS技术的车辆监控系统原理,讨论了系统中软件架构的设计原则和实现思路。车辆监控系统由车辆调度中心、无线通信网络和车载设备组成。软件架构设计包括架构的选型和相关技术的运用,并详细讨论了通信平台的设计。 相似文献
15.
贺嘉含 《科技成果管理与研究》2009,(8):66-68
全球定位系统（GPS）提供全球覆盖、全天候、免费的标准授时／导航定位服务,使GPS系统不仅能很好地应用于消防车辆的指挥调度,而且还能将车辆的状态信息（如待命、出动、收队、返回、修理、加油、外出训练等）通过现代化的无线通信手段传送到指挥中心及相应的消防站,完成消防车辆管理、火灾现场的了解,以及火灾的扑救指挥工作。 相似文献
16.
Lu Jiang Liping Yan Yuanqing Xia Qiao Guo Mengyin Fu Li Li 《Journal of The Franklin Institute》2019,356(17):10315-10334
In this paper, the event-triggered distributed multi-sensor data fusion algorithm is presented for wireless sensor networks (WSNs) based on a new event-triggered strategy. The threshold of the event is set according to the chi-square distribution that is constructed by the difference of the measurement of the current time and the measurement of the last sampled moment. When the event-triggered decision variable value is larger than the threshold, the event is triggered and the observation is sampled for state estimation. In designing the dynamic event-triggered strategy, we relate the threshold with the quantity in the chi-square distribution table. Therefore, compared to the existed event-triggered algorithms, this novel event-triggered strategy can give the specific sampling/communication rate directly and intuitively. In addition, for the presented distributed fusion in wireless sensor networks, only the measurements in the neighborhood (i.e., the neighbor nodes and the neighbor’s neighbor nodes) of the fusion center are fused so that it can obtain the optimal state estimation under limited energy consumption. A numerical example is used to illustrate the effectiveness of the presented algorithm. 相似文献
17.
《Journal of The Franklin Institute》2023,360(4):3407-3435
In this paper, we study a distributed state estimation problem for Markov jump systems (MJS) over sensor networks, in which each sensor node connects with each other through wireless networks with communication delays. We assume that each sensor node maintains a buffer to store delayed data transmitted from neighbor nodes. A distributed multiple model filter is designed by using the interacting multiple model methods (IMM) and a recursive delays compensation method. In order to ensure the stability, two stability conditions are derived for boundedness of estimation errors and boundedness of error covariance. Finally, the effectiveness of the proposed methods is illustrated by simulations and experiments of maneuvering target tracking. 相似文献
18.
江苏省广播电视总台新建广播融媒体直播车,集成音视频系统,并运用无线自组网、4G传输及卫星“动中通”等通信技术组成稳定可靠的传输系统,实现可移动的融媒体直播。 相似文献
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Cooperative traffic systems renew much research interest with the rapid development of communication technologies. This paper considers a finite number of vehicles moving in a single lane from a mesoscale perspective and explores the spectral properties of such a cooperative system, in particular how the communication range and the coupling weights influence the eigenvalues of the global disturbance transition matrix (DTM), i.e., disturbance modes of the traffic system. Dynamics of these vehicles are described by a modified coupled-map car-following model under periodic boundaries with inter-vehicle communications. From a state-space approach, a system DTM is established from a global view and a closed-form solution of its eigenvalues is derived. Linear stability conditions are subsequently obtained. It is found that the eigenvalue distribution of system DTM is essentially dominated by the communication range and the coupling weights, but nearly independent of the system size. By analyzing the magnitudes of the dominant poles, the synchronization of the traffic system is enhanced if the weights of the vehicles within the communication range are more evenly distributed or the communication range is increased. Particularly, it is shown that the optimal communication network tends to be a mean-field network w.r.t. global synchronization, indicating that a communication network emphasizing uniform importance among vehicles within each vehicle’s communication range is helpful for improving the synchronizability. Finally, numerical simulations verify the results. 相似文献