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关键词： structural health monitoring   wireless smart sensor network   cable-stayed bridge   deployment   evaluation  

摘要： Structural health monitoring (SHM) of civil infrastructure using wireless smart sensor networks (WSSNs) has received significant public attention in recent years. The benefits of WSSNs are that they are low-cost, easy to install, and provide effective data management via on-board computation. This paper reports on the deployment and evaluation of a state-of-the-art WSSN on the new Jindo Bridge, a cable-stayed bridge in South Korea with a 344-m main span and two 70-m side spans. The central components of the WSSN deployment are the Imote2 smart sensor platforms, a custom-designed multimetric sensor boards, base stations, and software provided by the Illinois Structural Health Monitoring Project (ISHMP) Services Toolsuite. In total, 70 sensor nodes and two base stations have been deployed to monitor the bridge using an autonomous SHM application with excessive wind and vibration triggering the system to initiate monitoring. Additionally, the performance of the system is evaluated in terms of hardware durability, software stability, power consumption and energy harvesting capabilities. The Jindo Bridge SHM system constitutes the largest deployment of wireless smart sensors for civil infrastructure monitoring to date. This deployment demonstrates the strong potential of WSSNs for monitoring of large scale civil infrastructure.

关键词： PHOTONICS   OPTICAL communications   FIBER optics  

摘要： The article reports on developments of the three-year photonic skins for optical sensing (PHOSFOS) project funded by the European Commission for 2.5 million euros. It notes that the project has now perfected its fiber-production methods and are now set for medical applications. It adds that lead researcher Francis Berghmans has revealed that the fiber-sensor technology is thin-skinned but has strong mechanical properties.

关键词： INFRARED detectors   STRATEGIC planning   MILITARY supplies  

摘要： The article reports on the move of FLIR Systems to launch a pair of uncooled infrared sensors called Recon M monocular systems in the U.S. It indicates that the infrared sensors are capable of giving lowcost, lightweight, high-performance sensor to soldiers, sailors, airmen, marines, coast guardsmen and law enforcement. Moreover, it stresses that the development of the handheld sensors is part of FLIR's strategy that aims to develop soldier solutions.

关键词： G-protein-coupled receptors (GPCRs)   cell-based assays   flow cytometry   imaging   reporter gene assays  

摘要： Ligand-dependent receptor internalization is a feature of numerous signaling systems. In this article, the authors describe a new kind of live-cell biosensor of receptor internalization that takes advantage of fluorogen-activating protein (FAP) technology. Recombinant genes that express the human beta2 adrenergic receptor (beta 2AR) with FAP domains at their extracellular N-termini were transduced into mammalian cells. Exposure of the cells to membrane-impermeant fluorogens led to a strong fluorescent signal from the cell surface. Agonist-dependent translocation of the receptor from the surface to the cell interior was readily observed and quantified by fluorescence microscopy or flow cytometry in a homogeneous format without wash or separation steps. The approach described here is generalizable to other receptors and cell surface proteins and is adaptable to a variety of fluorescence-based high-throughput screening platforms. (Journal of Biomolecular Screening 2010: 703-709)

关键词： 在线监测系统   输电线路   线路状态   塌陷区   传感器技术   状态监测系统   铁塔结构   导线张力  

摘要： 本项目采用传感器技术和现代通信技术开发输电线路状态监测系统，对塌陷区杆塔倾斜进行在线安全监测，系统综合考虑了铁塔结构、导线柔性及塌陷区环境参数，建立输电线路综合分析模型及参数变化趋势分析模型，通过对线路关键部位杆塔上安装的传感器对导线张力、铁塔塌陷位移倾角、绝缘子串偏角等的在线监测，

关键词： 传感器   传感器技术   无线传感网络  

摘要： 传感器(Sensor)技术是现代信息技术的三大核心技术之一,现被列为二十一世纪尖端科学的重要组成部分。传感器是感知被测对象的人工器官。目前,它正在由简单的传感器系统向集成化、智能化、知识化的复杂传感器系统方向发展。本论述针对传感器及其技术的发展现状做了重点论述,并对现代传感器及其技术的发展趋势做出了科学的判断。

关键词： 投资机会   互联网   高度重视   医药产业   投资人   传感器技术   新兴产业   实际应用   应用解决方案   产业发展  

摘要： 物联网(The Internet of Things)的概念近来很火,二级市场上和其沾得上边儿的公司连日飘红,大有2000年时互联网之势。其概念存在已久,庄家如此的厚爱,是简单股市炒作,还是背后真有什麽原因?它代表了哪些产业?其中是否有投资机会?这些恐怕是我们投资人最关心的问题。从"两会"上传递出来的信息显示,战略性新兴产业发展正面临巨大的机会。战略性新兴产业发展规划正在起草,预计五六月份正式出台,包括新能源、新材料、节能环保、生物技术、物联网等相关新兴行业。物联网作为战略性新兴产业,受到了政府的高度重视,近期无论从标准制定还是产业应用上都在快速推进。我国的物联网发展与世界基本同步,而且有自主产权的TD-SCDMA为基础的3G/4G移动通讯技术也为其提供了可能,我们有机会参与制定标准。2010年4月8日在北京举行的"下一代互联网与物联网高峰论坛",正式发布了《物联网产业发展研究(2010)》报告:物联网产业链由应用解决方案、传感感知、传输通信、运算处理四大关键环节构成。可见我国政府层已下定决心,物联网新兴产业的大网已经撇开,而且物联网的产业量预计比互联网大30倍,投资者必须做好准备。

关键词： 化学分析   荧光探针   自组装膜   传感器技术  

摘要： 荧光分析是一种重要的的光谱化学分析方法，而比率荧光信号由于引入自动校准功能提高了检测的准确度使其优于单一荧光强度响应信号，可实现高精量检测。比率传感一个突出优点就是通过强度比值的变化提高动态响应的范围，建立起内标从而极大的削弱环境因素的干扰。本研究将自组装技术和“内标”式荧光探针检测方法结合起来，建立了基于“内标”式双荧光自组装膜的新型荧光传感与分子界面识别方法，极大地提高了荧光定量分析的准确度和灵敏度。本文主要研究内容如下：\n ⑴研究聚苯乙烯磺酸钠（PSS）诱导吖啶橙（AO）形成激基缔合物，以及浓度、溶剂、pH、温度、电解质等因素对激基缔合物形成的影响。对各种阳离子染料和阴离子聚电解质（PSS，PAA，PVS）的不同作用机理做了初步的总结，为吖啶橙双荧光自组装膜的构建做前期工作。\n ⑵以吖啶橙单体为荧光探针，量子点CdTe为荧光内标，在硅烷化石英表面分别组装量子点CdTe和吖啶橙，利用层层组装技术构建了Quartz/APES/CdTe/CS/PSS/AO自组装多层膜。所构建的自组装膜双荧光强度比I1/I2（I1为AO的荧光强度，I2为量子点CdTe的荧光强度）不随检测电压的波动和传感器的狭缝比等微环境变化而变化，有效的降低了环境因素对实验结果的影响，提高了荧光分析的准确性。\n ⑶基于由同一个荧光团产生的参比和识别信号对外界环境具有相同的敏感度，利用激基缔合物原理构建了以吖啶橙激基缔合物（AOE）为内标，吖啶橙单体（AOM）为荧光探针的Quartz/APES/PSS/AOE/PSS/AOM“内标”式双荧光自组装膜传感器。该膜的双重荧光强度比值IM/IE与Cu2+浓度呈良好的线性关系，定量检测下限（3SD/k）为15.8nmol/L。

关键词： 休斯公司   流量计   贝克   传感器技术   网络功能   潜水泵   井下  

摘要： 贝克休斯公司已开发出一种多相流量计，它结合了井下传感器技术与经网络功能，可实时估计潜水泵系统从井底抽取液流的流量，且费用低廉。

关键词： 光纤传感器   变压器   多参数   在线监测  

摘要： 应用光纤传感器对运行状态变压器参数进行实时的信号采集,经数字信号处理后实现电力系统变压器的在线实时监测,实现了变压器的无人值守,提高了变压器安全运行监测水平。