Review of fiber Bragg grating sensor technology

The current status of the fiber Bragg grating (FBG) sensor technology was reviewed. Owing to their salient advantages, including immunity to electromagnetic interference, lightweight, compact size, high sensitivity,large operation bandwidth, and ideal multiplexing capability, FBG sensors have attracted considerable interest in the past three decades. Among these sensing physical quantities, temperature and strain are the most widely investigated ones. In this paper, the sensing principle of FBG sensors was briefly introduced first. Then, we reviewed the status of research and applications of FBG sensors. As very important for industrial applications,multiplexing and networking of FBG sensors had been introduced briefly. Moreover, as a key technology, the wavelength interrogation methods were also reviewed carefully. Finally, we analyzed the problems encountered in engineering applications and gave a general review on the development of interrogation methods of FBG sensor.     

基于IEC 61850的智能变电站无线温度监测系统

在分析变电站温度监测的功能需求的基础上,设计了一种新型的基于IEC 61850的智能变电站无线温度监测系统,系统在完成对变电站关键设备的运行温度进行全自动的实时监测的同时,也消除了已有类似监测系统获取信息的局部性、分散性和孤立性。并着重讨论了其中的ZigBee无线组网技术与系统的IEC61850信息建模。系统已在变电站现场成功运行,验证了系统设计的合理性与有效性。     

基于PRIME标准的低压电力线载波通信组网方案

在阐述低压配电网电力线载波通信网络拓扑和特征的基础上,结合PRIME标准中媒体访问控制(MAC)层的帧结构、类型,深入归纳、分析和总结了PRIME标准中的电力线载波通信组网初始化算法、网络维护与重构算法。通过采用电力线载波芯片ST7590T,应用PRIME标准协议,在某一厂区搭建96节点的现场测试环境,实例分析该组网方案的初始化和网络重构过程,并针对现场可能出现的状况,验证了该组网方案的灵活性、抗毁性和现场可应用性。     

Design and implementation of a reconfigurable test-bed for real-time security measurements in VoIP systems

Voice over Internet Protocol (VoIP) systems have to face a great number of security threats, which are basically connected to the underlying Internet Protocol (IP) infrastructure. Along with relevant economic losses and malfunction for the VoIP system itself, external attacks exploiting a security hole could also bring to a major security failure for the interconnected Public-Switched Telephone Network (PSTN), usually regarded as a reliable and secure domain. This is the reason why before connecting a private VoIP network to the carrier infrastructure, a great number of tests have to be carried out, to verify the security robustness of the VoIP network to common attacks.     

基于总线的多功能电力仪表组网技术研究

针对多功能电力仪表通信接口与规约的多样性,本文研究了基于总线的多功能电力仪表组网技术。在实验室环境下采用总线技术对电厂与变电站厂(站)用电系统常见的多功能电力仪表进行了组网,开发了一个集成各种规约与接口的数据处理平台,并对系统的数据采集、通信等性能予以试验验证。结果显示,该系统实现了厂站电气监控系统的主要功能,性能可靠。本文研究成果可以在实际的现场工程应用中加以推广,有助于提高变电站、电厂等厂矿企业电气系统的协调控制和运行管理水平。     

智能配、用电网通信技术及组网方案

通信信息平台是智能电网的重要支持系统,配、用电通信网一直以来缺乏适用的通信解决方案,成为制约智能电网在配、用电侧应用的瓶颈。分析了智能配、用电通信网的特点及业务发展需求,对无源光网络（passive optical network, PON）、全球微波接入互操作（world interoperability for microwave access,WiMAX）和电力线载波（power line carrier, PLC）等适用通信技术进行了分析,并对其在配、用电通信网中的应用进行了经济技术比较,最后提出了智能配、用电通信网的系统架构和组网技术方案。     

青藏直流联网工程通信光纤选型分析

在OPGW光通信工程中,光纤的选择十分慎重.文章通过详细阐述光纤选型的意义和常见光纤以及新型超低损耗光纤的结构、特点等,并结合青海-西藏±400 kV直流联网工程配套OPGW光通信工程中的光缆运行环境、中继段长度等因素,在工程中部分采用新型的超低损耗光纤,是国内工程中首次使用超低损耗光纤.     

用于电力塔远程监控的无线传感器网络装置

设计一种了解电力塔实时情况的远程监控装置,通信时运用无线传感器网络技术并结合ZigBee中的算法协议进行分析以求达到节能高效并最终延长设备使用生命周期的目标.结合电力塔分布的实际情况在通信过程中运用了一种新型的通信路由算法,即线性通信组网方式;信息传输时考虑到实际的节能要求,采用了分布式功率控制的方法.     

大高差多热源供热管网回水压力低的解决方案

某大高差、多热源环状供热管网水力计算中,个别地形较高的调峰热源厂回水压力过低。针对这一问题,提出两种解决方案：一是提高基本热源定压点压力,二是在水力交汇点基本热源一侧的回水干管上设置调节阀。     

物联网技术在现代建筑行业中的应用

阐述了物联网技术的基本概念及发展历程,介绍了物联网技术的网络架构,并在此基础上讨论了物联网技术在现代建筑行业的应用模式和发展前景,为城市的信息化起到推动作用。