共查询到20条相似文献,搜索用时 906 毫秒
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基于ZigBee和WLAN的智能家居监控系统的设计 总被引:4,自引:0,他引:4
综合zigBee无线传感器网络和无线局域网(WLAN),设计了集多传感、分布式处理和事件触发监视于一体的具有双层网络结构的智能家居多媒体监控系统.ZigBee网络由标量传感节点和多媒体传感节点(网关)基于IEEE 802.15.4/ZigBee协议构建.负责采集标量数据上传到WLAN或执行来自上层的指令.多媒体传感节点基于WLAN连接到远程监控中心形成远程视频监控网络,将ZigBee网络上汇聚来的传感数据、报警信号和压缩视音频流等多媒体数据发送到监控中心及用户.利用此系统,为用户提供家居环境参数监测、报警、事件触发或持续的远程家居监控功能. 相似文献
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针对蓝色经济区水产养殖粗放式管理现状,设计了新型水产养殖物联网监控系统。该系统的传感器节点负责水质数据采集功能,并通过Zigbee无线传感器网络将数据发送给汇聚节点,汇聚节点通过GPRS模块接入Internet网络,将数据传送至远程监控中心。同时监控中心设置的各项参数通过Internet和汇聚节点传到采用PIC单片机的控制节点,实现水质的自动控制。监测中心软件采用C++ Builder开发,为用户提供形象直观的实时数据监测平台。经过在日照市某水产养殖基地的试用,系统性能满足水产养殖水质监控的应用要求。 相似文献
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为解决目前矿井水源类型识别人工采样、劳动强度大,数据分析周期长等问题,本文构建了基于无线传感网络的矿井水质在线监测系统,该系统由传感器节点、协调器节点和地面监控主机构成。传感器节点采用Atmega128处理器实时采集矿井水温度、PH值和电导率信息,通过无线通信模块CC2530直接发送给协调器节点,协调器节点通过串口将数据上传给地面监控主机。节点软件以IAR为开发环境,采用单片机C语言开发实现数据处理和传输。监测软件以C#程序开发直观的实时数据监控平台。通过现场测试表明,系统运行稳定,可靠性高。 相似文献
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本系统旨在实现偏远地区的农业生长无人化管理。本系统由3部分组成,带有网关的无线传感网络、3G路由器和远端监控中心。由于偏远地区网络基础设施落后,无线传感网络收集的农作物生长的环境参数,不方便以有线网络的方式传输到监控中心。于是本系统采取了3G远程监控的方式,借助运营商的3G网络,实现无线传感网络和远程监控中心的双向通信。 相似文献
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为实现低成本远程图像监控,文章设计了一套基于ZigBee和GPRS技术的远程图像采集传输系统.以CC2430为节点控制摄像头采集图像数据,本地通信时,图像数据通过ZigBee协调器直接和服务器通信;远程通信时,协调器将处理好的数据通过GPRS技术传到监控中心以实现图像数据的保存、读取和显示等目的.ZigBee无线传感网络节点间采用网状网络的自组网方式,通过修改协议栈的缓冲机制和改变串口波特率提高数据的传输效率.实验结果表明该系统能够很好地实现本地和远程静态图像的采集与快速传输,具有广泛的应用前景. 相似文献
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基于Zigbee技术的无线环境监测系统正因为其自组织、能耗低、可靠性高、设备复杂度低等特点在实时监测技术中显得越来越重要,它能有效改善传统的环境监测模式的不足.对基于Zigbee技术的无线环境监测节点进行研究,设计了系统结构和硬件电路,并给出了部分软件代码.由终端节点采集并处理温度、湿度、烟雾和RSSI(接收信号强度)值等多参数,然后通过Zigbee网络经由协调器传输到上位机进行实时监测,并且能够进行节点的测距及长期的数据分析,在无线环境监测领域具有极高的实用价值. 相似文献
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《Proceedings of the IEEE. Institute of Electrical and Electronics Engineers》1984,72(10):1276-1289
The seismic method in petroleum exploration is an echo-location technique to detect interfaces between the subsurface sedimentary layers of the earth. The received seismic reflection record (field trace), in general, may be modeled as a linear time-varying (LTV) system. However, in order to make the problem tractable, we do not deal with the entire field trace as a single unit, but instead subdivide it into time gates. For any time gate on the trace, there is a corresponding vertical section of rock layers within the earth, such that the primary (direct) reflections from these layers all arrive within the gate. Each interface between layers is characterized by a local (or Fresnel) reflection coefficient, which physically must be less than unity in magnitude. Under the hypothesis that the vertical earth section has small reflection coefficients, then within the corresponding time gate the LTV model of the seismic field trace reduces to a linear time-invariant (LTI) system. This LTI system, known as the convolutional model of the seismic trace, says that the field trace is the convolution of a seismic wavelet with the reflection coefficient series. If, in addition, the reflection coefficient series is white, then all the spectral shape of the trace within the gate can be attributed to the seismic wavelet. Thus the inverse wavelet can be computed as the prediction error operator (for unit prediction distance) by the method of least squares. The convolution of this inverse wavelet with the field trace yields the desired reflection coefficients. This statistical pulse compression method, known as predictive deconvolution with unit prediction distance, is also called spike deconvolution. Alternatively, predictive deconvolution with greater prediction distance can be used, and it is known as gapped deconvolution. Other pulse compression methods used in seismic processing are signature deconvolution, wavelet processing, and minimum entropy deconvolution. 相似文献
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Experimental performance of soil monitoring system using IoT technique for automatic drip irrigation
Ravi Kant Jain Arpita Mukherjee Pratap Karmakar Aishwarya Banerjee Husan Akbarov Shavkat Hasanov 《International Journal of Communication Systems》2023,36(18):e5617
This paper proposes an IoT-enabled soil monitoring system using wireless sensor network for automatic irrigation in agricultural applications, especially for lemongrass plants, where an automated control system is required for irrigation applications. This can solve the problem of the water crisis, which is faced by the farmers during the cultivation of the crop in the field. This controls the water supply in the irrigation process using an IoT communication system. A system architecture for soil monitoring and controlling irrigation using IoT technique is designed where the different sensors and actuators like humidity, soil moisture, temperature, pump, and so forth are connected with a node microcontrol unit and message queuing telemetry transport (MQTT) protocol for enhancing communication capabilities. This wireless sensor network gives feedback to the system. This provides automation by the on/off pump system during drip irrigation. The sensor data are displayed on a PC or mobile phone through wireless communication and an IoT cloud platform. An experimental testing setup is developed and the experimental performance of a soil monitoring system using IoT technique for automatic drip irrigation has been carried out and soil moisture data are also stored in a cloud server for analytics. The performance shows that the MQTT protocol sends data within 48 s to the IoT cloud so that the data can be acquired in a faster manner. This shows that this kind of soil monitoring system is suitable for automatic drip irrigation, which enhances the farming process and overcomes the water crises in the agricultural system by reducing the wastage of water. 相似文献
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介绍了基于单片机C8051F021管理的某机载雷达电源监控系统,采用嵌入式微机内总线控制,实时监控分布式并联供电电源的工作状态。通过具有双串行口的CPU,分别实现与上位机和多个监控分机之间的通信,并作为一个分节点,加入到雷达内总线控制系统,实现机载雷达对电源系统的控制和监测,有利于提高系统的可使用性和可靠性。 相似文献
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Webster William J. Miller Warner H. Whitley Raymond Allenby Richard J. Dennison R. Tindal 《Geoscience and Remote Sensing, IEEE Transactions on》1981,(2):91-94
Because of the high data-rate requirements, a practical system capable of collecting seismic information in the field and relaying it, via satellite, to a central collection point is not yet available. A seismic signal processor has been developed and tested for use with the NOAA/ GOES satellite data collection system. Performance tests on recorded, as well as real time, short period signals indicate that the event recognition technique used is nearly perfect in its rejection of environmental noise and other non-seismic signals and that, with the use of solid state buffer memories, data can be acquired in many swarm situations. The design of a complete field data collection platform is discussed based on the prototype evaluation. 相似文献
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设计并实现了基于无线传感器网络技术的模块化和低功耗的麦冬多元环境数据监测与自动灌溉系统,提出了传感器节点功能与电源相互独立的模块化节点硬件方案,构建了多维度的麦冬田间环境数据监测无线传感器网络以及针对麦冬的灌溉决策模型。系统将采集的麦冬农田环境数据(土壤湿度、地表温度等)结合气象台的温度、湿度以及降雨量等气象数据作为灌溉模型的输入量,进行灌溉决策分析,实现了对麦冬生长环境参数的精确监测和自动灌溉控制。通过在麦冬大田的实际测试结果表明,系统各项功能运行稳定可靠,适用于大中型中药材种植的田间环境连续监测与灌溉控制。 相似文献
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提出了一种可动态配置 IP 跨网段的数据链网络监视管理系统的设计与实现方法, 该系统应用层采用 B/S 与 C/S 的混合架构,网络层通过软件定义网络(SDN)集群实现数据链网内成员间的跨网段交互的动态可配置。系统功能涉及平台身份控制、方案管理、跨网段参数控制、 多网段内节点状态监视等技术。所设计方法的应用结果表明,该系统可以为数据链网络提供可靠的监视与管理服务,任意节点间路由关系动态可配置,提高数据链各节点的灵活性,满足项目应用要求。 相似文献