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关键词： Fire gas detection   Gas propagation   Gas sensors   GasFET   Metal oxide sensors   Electrochemical cells   Low-power  

摘要： The physical mechanisms of spreading of smoke and gas during a fire event must not be necessarily the same. Due to the heat smoke particles are more likely transported by convection with a minor contribution of diffusion effects whereas gas is transported by both convection and presumably with a higher fraction of diffusion. In order to investigate these differences we selected a variety of gas sensors and placed them at different positions in a fire test room. Gas sensitive field effect transistor (GasFET)-arrays, metal oxide sensors (MOS) and electrochemical cells (ECs) were used for gas measurements in test fire scenarios. Beside the investigation of the performance of the sensor elements itself, we additionally focused our investigations on the propagation behavior of different aerosol and gas components of standardized (EN54) test fires in time and space. We mounted different gas sensors on PCBs which were setup into different vertical "multi-sensor" chains representing a measurement grid in space. The metal oxide sensors showed the fastest response whereas the GasFET-array was responding slower but shows advantages with respect to low-power consumption and pattern recognition capabilities. The EC carbon monoxide sensor has a good selectivity but a high price comparing to semiconductors. We observed that smoke aerosols mainly stay beneath the ceiling whereas the fire related gases also are transported in regions below the ceiling and near to the floor. As a very surprising and promising result we observed that gases also diffuse through heat layers which may occur during fires right below the ceiling and which smoke particles are not able to pass through and thus are not able to enter into the detector to reach the optical measurement chamber. In our case CO reached the gas sensors over 4 min earlier before any smoke could be detected by optical smoke detectors. (C) 2011 Elsevier B.V. All rights reserved,

关键词： early warning system   intelligent water supply   Mach Zehnder Interferometry (MZI) principle   optical sensor   refractive index   smart grid  

摘要： For safe supply of drinking water, water quality needs to be monitored online in real time. The consequence of inadequate monitoring can result in substantial health risks, and economic and reputational damages. Therefore, Vitens N.V., the largest drinking water company of the Netherlands, set a goal to explore and invest in the development of intelligent water supply. In order to do this Vitens N.V. has set up a demonstration network for online water quality monitoring, the Vitens Innovation Playground (VIP). With the recent innovative developments in the field of online sensoring Vitens kicked off, in 2011, its first major online sensoring program by implementing a sensor grid based on EventLab systems from Optiqua Technologies Pte Ltd in the distribution network. EventLab utilizes bulk refractive index as a generic parameter for continuous real time monitoring of changes in water quality. Key characteristics of this innovative optical sensor technology, high sensitivity generic sensors at low cost, make it ideal for deployment as an early warning system. This paper describes different components of the system, the technological challenges that were overcome, and presents performance data and conclusions from deployment of Optiqua's EventLab systems in the VIP.

摘要： The workshop "Cancer care: new detector and sensor technologies and their potential impact", organised jointly by the Science and Technology Facilities Council (STFC) and the British Institute of Radiology, brought together representatives from the cancer community (clinicians, medical physicists, National Health Service representatives and general practitioners with an interest in cancer) and STFC-supported scientists involved in basic research in physics and technology. The workshop aimed to raise awareness of the cancer challenge, share knowledge and identify novel solutions in the area of detectors and sensors to addressing the cancer challenge. A further aim of this workshop was to commence discussion on the formation of new multidisciplinary community networks. The workshop identified the synergies between the two communities and the potential for developing new collaborative ideas and projects.

关键词： 传感器技术   微控制器   双模式   智能清洁护理床  

摘要： 针对当前清洁护理床智能化程度不高,处理需要人工干预的问题,通过引入传感器技术,利用微控制器对清洁护理床运行过程进行自动控制,提出了一种新的基于传感器技术的双模式智能清洁护理床模型,提高了护理床的智能性和可靠性。

关键词： 传感器技术   森林防火   多跳技术  

摘要： 将现有的传感器技术和无线Adhoc多跳技术相结合,建立一个价格低廉、性能稳定,更换电池或电力设备即可重新复用的火灾预警系统。文章对此进行了研究。

关键词： 激光威胁告警系统   传感器技术   分类与应用  

摘要： 随着激光技术科研水平的发展,越来越多的激光武器被研制出来,并且在适用在局部战争中,发挥的作用显著。对此,世界各国军事科研机构在日益严重的激光威胁下,相继开展对激光威胁告警系统的研制工作。而传感器技术,作为激光威胁告警系统中的核心技术,也随着科研力度的加深而逐步升级。本文中,笔者将就该告警系统中的传感器技术的分类与应用进行简要阐述。

关键词： 氧传感器   氧气浓度   原理   特性  

摘要： 氧传感器广泛应用在工业、科研及国防领域,用于测量环境中的氧气浓度。针对不同的测量环境,氧传感器的测量原理、性能及其适用的范围也各不相同。文章对不同原理的各种氧传感器进行了介绍,对比分析了不同原理氧传感器具有的特性以及发展技术现状,以便根据不同的需要及使用环境选择合适的氧传感器。

关键词： 无线传感器网络   宏观   传感器技术   物联网   资金支持   发展资金   组网技术   工信部  

摘要： 【项目】 两部委公布物联网资金支持项目 11月6日,工信部联合财政部公布2012年物联网发展资金拟支持项目。工信部2012年物联网专项扶持的项目更加细化,支持的项目除了传统医疗、工业、物流、交通等大领域外,还有无线传感器网络自组网技术研发、微型和智能传感器技术研发、

关键词： 制药工业   世界   传感器技术   无菌生产   固体制剂   专家讨论   制剂生产   设备闲置  

摘要： 由世界制药工业的一些专家讨论了他们对固体制剂和无菌生产的见解。1在过去10年中固体制剂生产最重要的进展Natoli公司的凯特勒说：新的配方技术的发展，使难溶性的分子成为用于患者的有效的治疗剂是重大的进步。FinnBrit公司的摩顿说：已经有一些新的进展，如清洗的改进，它允许当切换到另一种产品时，更短的转换时间，以及用于制粒，混合，压实的传感器技术的发展。然而，传统的批量加工是非常低效的，因为设备闲置时间较长。而最重要的进步是开始应用连续的生产方法。

关键词： 薄膜   钯铬   氢气传感器  

摘要： 文中介绍了采用Pd-Cr合金作为氢敏材料,利用MEMS加工技术制备薄膜型氢气传感器。测试了传感器对0～4%浓度范围氢气的敏感特性,结果显示,传感器对0～4%氢气浓度具有良好的线性输出特性,并表现出较高的响应灵敏度和较好的响应重复性。