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关键词： 无线传感器网络   网络技术   现代信息技术   传感器技术   计算机技术   电系统设计   信息采集   信息处理  

摘要： 本期专题是无线传感器网络。 现代信息技术的三大基础是信息采集（即传感器技术）、信息传输（通信技术）和信息处理（计算机技术），传感器属于信息技术的前沿尖端产品，尤其是无线传感器网络技术。本期在“专家评述”栏目安排了海尔集团陈艳丽工程师撰写的《物联网宽带PLC家电系统设计实现方案》，文中解决了应用中碰到的同相干扰、跨相耦合、自动组网等方面的问题，扩大了产品的应用范围，希大家关注．

关键词： 农业机械传感器节点应用  

摘要： 综述传感器技术构成等方面的特点,重点介绍传感器的发展现状。传感器技术与农业机械自动化技术等相结合,有助于优化农业,发现和处理农业机械存在的潜在问题,促进农业机械的自动化发展进程,降低能耗,节省人力资源。并分析了传感器技术在未来农业机械中的发展趋势。

关键词： 新书介绍   纯电动汽车   驱动系统   控制技术   功率变换技术   速度闭环控制   驱动电动机   传感器技术  

摘要： 《电动汽车的驱动与控制》本书比较全面地介绍了电动汽车驱动系统控制技术的现状,阐述了电动汽车驱动系统的基本结构、工作原理、驱动电动机技术、功率变换技术、传感器技术及相关的建模与仿真技术。针对纯电动汽车的驱动系统进行建模,对电动汽车驱动系统的速度闭环控制的稳定性问题和控制策略进行了深入研究。根据两款电动轿车驱动系统的主要参数,

关键词： Biological stress parameters   decision making   sensors   trader  

摘要： The role of the global economy is fundamentally important to our daily lives. The stock markets reflect the state of the economy on a daily basis. Traders are the workers within the stock markets who deal with numbers, statistics, company analysis, news, and many other factors that influence the economy in real time. However, while making significant decisions within their workplace, traders must also deal with their own emotions. In fact, traders have one of the most stressful professional occupations. This survey merges current knowledge about stress effects and sensor technology by reviewing, comparing, and highlighting relevant existing research and commercial products that are available on the market. This assessment is made in order to establish how sensor technology can support traders to avoid poor decision making during the trading process. The purpose of this paper is: 1) to review the studies about the impact of stress on the decision-making process and on biological stress parameters that are applied in sensor design;2) to compare different ways to measure stress by using sensors that are currently available in the market according to basic biometric principles under trading context;and 3) to suggest new directions in the use of sensor technology in stock markets.

关键词： Welding robot   Pulsed GTAW   Three-dimension seam   Real-time tracking   Visual sensor   Arc sensor  

摘要： Aiming at the shortcomings of teaching-playback robot that can't track the three-dimensional welding seam in real time during GTAW process, this paper designed a set of composite sensor system for tracking the three-dimensional welding seam based on visual sensor and arc sensor technology, which can effectively acquire three-dimensional welding seam information, such as clear images of seam and pool and stable arc voltage signals. The characteristic values of weld image and arc voltage signals were accurately extracted by using proper processing algorithm, and the experiments have been done to verify the precision of processing algorithms. The results demonstrate that the error is very small, which is accurate enough to meet the requirements of the subsequent real-time tracking and controlling during the welding robot GTAW process.

关键词： pest detection   trap monitoring   image processing   image sensors   low power devices  

摘要： Monitoring pest insect populations is currently a key issue in agriculture and forestry protection. At the farm level, human operators typically must perform periodical surveys of the traps disseminated through the field. This is a labor-, time-and cost-consuming activity, in particular for large plantations or large forestry areas, so it would be of great advantage to have an affordable system capable of doing this task automatically in an accurate and a more efficient way. This paper proposes an autonomous monitoring system based on a low-cost image sensor that it is able to capture and send images of the trap contents to a remote control station with the periodicity demanded by the trapping application. Our autonomous monitoring system will be able to cover large areas with very low energy consumption. This issue would be the main key point in our study;since the operational live of the overall monitoring system should be extended to months of continuous operation without any kind of maintenance (i.e., battery replacement). The images delivered by image sensors would be time-stamped and processed in the control station to get the number of individuals found at each trap. All the information would be conveniently stored at the control station, and accessible via Internet by means of available network services at control station (WiFi, WiMax, 3G/4G, etc.).

关键词： Bridge   Fatigue   Hybrid simulation   Sensor   Structural testing   Structural health monitoring  

摘要： An increasing number of online structural health monitoring systems have been implemented on bridges, which are often comprised of a variety of local sensing and nondestructive evaluation (NDE) devices. However, before any new type of sensor and NDE technology, such as ultrasonic surface wave sensors, can be deployed for field implementation, they first need to be validated and characterized under realistic loads and environmental conditions in a controlled laboratory setting. This paper demonstrates the use of a hybrid testing setup to create a characterization testbed for more realistic evaluation of NDE and sensor technologies. A prototype bridge structure based on the Yellow Mill Pond Bridge in Connecticut was selected to demonstrate the features and issues of a hybrid simulation testbed for sensor characterization, such as flexibility in traffic load representation, and large-scale specimens even with small testing equipment. Using this prototype bridge structure, a series of hybrid simulation tests using real variable-amplitude traffic loading were performed on a 0.6-scale steel flange plate specimen with a welded cover plate. Features of this hybrid simulation testbed are discussed, including the complexity of the virtual model (e.g., the dynamic mass effects and damping of the structure) and stability issues that can develop in the test. Finally, the ability of the hybrid testing platform to evaluate sensor performance under varying environmental conditions was demonstrated for elevated temperatures. Although a strain gauge was used to demonstrate the technology, the sensor testbed can be used for general characterization of other types of NDE devices and sensors. DOI: 10.1061/(ASCE)BE.1943-5592.0000360. (C) 2012 American Society of Civil Engineers.

关键词： 传感器技术   案例教学   实践教学  

摘要： 《传感器技术》课程是自动控制、电子信息等专业的一门重要的专业基础课程。针对三本院校学生的水平,结合本课程特点,对教学内容和教学方法进行了深入的研究与分析。采用案例式教学法,增加实践环节,有利于调动学生的积极性,提高学生职业技能和创新能力,教学效果也得到了改善。

关键词： 传感器产业   物联网   传感器技术   传感器节点   现代信息技术   技术组成   计算机技术   现代科技  

摘要： 2传感器技术对物联网发展的意义2.1传感器的背景传感器技术作为现代科技的前沿技术,同计算机技术与通信技术组成现代信息技术的三大基础,也为当今物联网的发展铺平了道路,传感器更是物联网在工业领域应用的关键。（1）传感器。根据GB/T7665—2005＂传感器通用术语＂国家标准,传感器的定义为：能感受规定的被测量,并按照一定规律转换成可用信号的器件或装置。通常由敏感元件和转换元件组成。（2）传感器节点。传感器节点通常由3部分组成：传统意义上的传感器、微处理器、网络接口。根据不同要求,这3部分可采用不同芯片的组合,也可以是单片式的。

关键词： 传感器技术   电子设计竞赛   教学改革  

摘要： 随着全国大学生电子设计竞赛的广泛开展,引起学校对培养创新型人才的高度重视,加大教学投入,加强教学建设,教师积极进行"传感器技术"课堂教学内容、实验教学内容和教学方法改革,编写实用型教材;学生积极参与创新实验和创新活动。这些促进了教学改革向纵深发展。