共查询到19条相似文献,搜索用时 59 毫秒
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中海油负责中国海上油气勘探、开发与生产业务,是危险性较高的海上作业。信息化建设则为生产提供了必要的保障。现如今,海上平台通过卫星、微波、海底光缆逐渐构建出大型宽带网络,为用户提供互联网访问、语音电话等多种数据通信业务。但是服务于海上平台的船只,由于空间较小,船只改造困难,安装卫星通信设备困难,且卫星通信价格昂贵。至今为止,都没有直接接入地面网络,而船只与平台只能依靠高频电话进行通讯,效率较低。为了保障油田顺利生产,建设信息化传播系统是非常重要的措施,通过无线自组网,实现内部信息共享,加强部门协作能力,建立高效链条结构,使企业管理成本得到有效控制。 相似文献
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无线自组网是一种临时性的自治系统,ZigBee就是基于无线自组网的一种新兴无线网络技术,其广泛应用于我们的日常生活中,下面我们主要从ZigBee技术在LED照明方面的应用进行论述,LED路灯就是应用了ZigBee技术,与传统的路灯照明相比,应用了ZigBee技术的LED路灯更节省布线,从而降低了成本。 相似文献
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无线自组网的无中心、多跳、快速移动、拓扑结构高度动态变化以及无线信道等诸多特点,使其应用越来越广泛。但是,同时也面临着巨大的安全隐含,传统的安全机制不再适合于它,极大地阻碍了自组网的应用,特别是在关系到信息安全的应用领域。本文在对无线自组网的相关技术、特点以及安全研究现状的总结和分析基础上,探讨了无线自组网的安全机制中的有关问题。 相似文献
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能源中心计量数据采集系统邹通敏,马武,李志宏(冶金工业部自动化研究院北京100071)1前言对于一般大中型企业来说,为了提高产品质量、降低消耗、适应集约经营的市场竞争需要,有必要对原有的计量检测设备、现场数据的采集手段、计量数据的分析管理等传统的方法... 相似文献
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本文介绍了一种基于Zigbee技术的无线自组网能源计量数据采集系统,该系统由数据采集模块和通信模块组成。该系统采用C8051F060单片机作为数据采集终端的主控芯片,16位ADC作为(4~20)mA、(0~5)V模拟信号的数据采集器,精度可达万分之一;同时该系统具有RS-232、RS-485等多种数字式接口,满足各式能源计量仪表的接入要求;采用Zigbee无线通信模块作为数据传输终端,无需布线、组网便捷、数据传输稳定可靠。 相似文献
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针对南钢能源计量测点的具体分布情况,选择合理的数据采集方式,确保能源计量数据及时准确的传输到能源管理系统中,为能源监测、能源统计分析、能源利用提供可靠依据。 相似文献
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In recent years, with the rapid development of the Internet and wireless communication technology, wireless Ad hoc networks have received more attention. Due to the limited transmission range and energy of nodes in Ad hoc networks, it is important to establish a reliable and energy-balanced transmission path in Ad hoc networks. This paper proposes an energy-based dynamic routing protocol based on the existing AODV routing protocol, which has the following two aspects of improvement: (1) In the route discovery process, a node selects a suitable route from the minimum energy consumption route and the energy-balanced route designed in this paper according to a “Mark” bit that representing remaining energy of a node. (2) Based on (1), a route interruption update strategy was proposed to restart the route discovery process when node energy was used excessively. Simulation results demonstrate that compared with AODV and other existing routing protocols, proposed algorithm can reduce network energy consumption and balance node energy, thus extending the network lifetime. 相似文献
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一种新的基于移动预测的MANET路由协议 总被引:7,自引:0,他引:7
移动自组网是一种由一系列可以自由移动的节点主机聚集而成的一个临时性动态网络。它没有固定基站,也没有作为控制管理中心的节点主机,由于其拓扑的动态性,其路由协议与其他传统网络有很大的区别。为了能更有效地移动自组网中实现数据的传送,本文提出了一种基于移动预测下的MANET路由协议,该协议综合考虑了传输路径的延时和稳定性,选择在延时限制下平均拥有最稳特性的传输路径,模拟结果表明,这种方法比基于移动预测量稳路径路由协议的传输时延要短,传送成功概率要高,而控制开销却相关不大。 相似文献
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基于ZigBee的井下安全监控系统无线漫游网络 总被引:1,自引:0,他引:1
提出一种基于ZigBee通讯技术的煤矿瓦斯浓度监测的井下无线通信网络,该网络中无线通信节点模块呈树状结构分布,实现井上监控室到井下主巷道和分巷道工作面之间的通信,实时检测多个采煤工作面瓦斯浓度状况.该网络还可实现人员定位功能,矿工的矿帽上安装一个带有固定编号的无线通讯模块,将矿帽编号发送至附近无线通信节点,无线通信节点将该节点编号及矿帽编号通过网络一起发送至井上监控室,通过检测矿帽编号及无线节点的编号即可判断该矿工的位置. 相似文献
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Fei Li Jiayan Zhang Edward Szczerbicki Jiaqi Song Ruxiang Li Renhong Diao 《计算机、材料和连续体(英文)》2020,65(1):653-681
The increasing use of the Internet with vehicles has made travel more convenient. However, hackers can attack intelligent vehicles through various technical loopholes, resulting in a range of security issues. Due to these security issues, the safety protection technology of the in-vehicle system has become a focus of research. Using the advanced autoencoder network and recurrent neural network in deep learning, we investigated the intrusion detection system based on the in-vehicle system. We combined two algorithms to realize the efficient learning of the vehicle’s boundary behavior and the detection of intrusive behavior. In order to verify the accuracy and efficiency of the proposed model, it was evaluated using real vehicle data. The experimental results show that the combination of the two technologies can effectively and accurately identify abnormal boundary behavior. The parameters of the model are self-iteratively updated using the time-based back propagation algorithm. We verified that the model proposed in this study can reach a nearly 96% accurate detection rate. 相似文献
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Ajmal Khan Mubashir Mukhtar Farman Ullah Muhammad Bilal Kyung-Sup Kwak 《计算机、材料和连续体(英文)》2021,69(2):1725-1746
In post disaster scenarios such as war zones floods and earthquakes, the cellular communication infrastructure can be lost or severely damaged. In such emergency situations, remaining in contact with other rescue response teams in order to provide inputs for both headquarters and disaster survivors becomes very necessary. Therefore, in this research work, a design, implementation and evaluation of energy aware rapidly deployable system named EA-RDSP is proposed. The proposed research work assists the early rescue workers and victims to transmit their location information towards the remotely located servers. In EA-RDSP, two algorithms are proposed i.e., Hop count Assignment (HCA) algorithm and Maximum Neighbor Selection (MNS) algorithm. The EA-RDSP contains three types of nodes; the client node sends information about casualty in the disaster area to the server, the relay nodes transmit this information from client node to server nodes via multi-hop transmission, the server node receives messages sent by client node to alert rescue teams. The EAM-RDSP contains three types of nodes; the client node sends information about casualty in the disaster area to the server, the relay nodes transmit this information from client node to server nodes via multi-hop transmission, the server node receives messages sent by client node to alert rescue teams. The proposed EA-RDSP scheme is simulated using NS-2 simulator and its performance is compared with existing scheme in terms of end-to-end delay, message delivery ratio, network overhead and energy consumption. 相似文献
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