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关键词： Smart school   Systems, Security   RFID   GSM   GPS   Activity tracking   Smart bags   Smart school bus   Surveillance camera   Sensor technology   Cybersecurity  

摘要： The education system is one of the mechanisms and aspiration to build the society and contribute to human capital, well-being, and wealth. Security and privacy concerns in the educational organization is always significant due to various violent and terrorist activities. Technologies have been adopted for smart learning systems to improve the learning experience whereas security has been neglected inside or outside the institutions. The new integrated technologies have been adopted by using smart monitoring and sensing devices. The main objective of this paper is to analyze the Internet of Things (IoT) solutions specially designed for schools to provide smart and secure systems for educational settings. This paper also proposes a Secure system for the Internet of Schools Things (S-IoST) for smart schools based on a new advanced communication system integrated with 5 G cellular systems, sensing technologies, intelligent transportation systems, and IoT networks. The proposed system provides a more secure alert mechanism and facilitates the users at school and during mobility to the school or home. The proposed system evaluates in terms of data delivery, time, and response alert parameters.

关键词： UHF RFID   Graphene film   High conductivity   Mechanical stability  

摘要： Ultra-high frequency (UHF) radio frequency identification (RFID) tags with an antenna made of a highly flexible graphene assembly film (GAF) is presented. The superb electrical conductivity (similar to 1.6 x 10(6) S m(-1)) of the GAF results in the tag to reach reading range of similar to 12 m, which is comparable to that of the commercially available metallic counterparts. The performance of the GAF-based RFID tags under mechanical bending and stretching is experimentally evaluated, which demonstrates excellent mechanical stability of the GAF tag than that of metallic tags. Additionally, substrate stability tests are also conducted. The GAF-based UHF RFID tags can thus lead to numerous applications in information exchange, tracking and tracing as well as the Internet of Things (IoT). (C) 2021 Elsevier Ltd. All rights reserved.

关键词： Library inventory   RFID wand   RFID read rate   Tag location   Tag position   Book thickness   Book position   Kernel smoothing  

摘要： Purpose Low read rates are a general problem in library inventories. The purpose of this study is to examine the factors that contribute to the success of library inventory by means of a radio-frequency identification (RFID) inventory taker. The factors investigated were tag position, tag orientation, book thickness, tag density (related to thickness of a sequence of books) and position on the shelf. Design/methodology/approach A total of 210 books were placed in eight random permutations on three fixed book shelves. For each configuration, the RFID tags were read forty times. The resulting data were analysed by means of a generalized linear model, relating the combined contribution of tag position, tag orientation, book thickness and position on the bookshelf to the read rate. Findings The tags positioned directly next to the spine were always read, but those near the opening of the book (far from the spine and inventory reader) were not always read. Considering only books with tags near the opening, tag orientation and position on the shelf appeared not to be related to the read rate, while book thickness, thickness over three books and spine tag density appeared to have a small positive contribution to the read rate. Practical implications Low read rates during a library inventory can be prevented by placing the tags near the book spine - the other book specific factors (listed in the previous paragraph) are of little influence. When not scanned during a first sweep, repeated scanning can increase the read rate with 0.15. Originality/value This paper is one of the first to analyse the influence of tag location and book specific factors on the read rate of RFID tags in library books. The experimental approach sets an example for future work.

关键词： Radio-frequency identification (RFID)   Smart sewer networks   Passive UHF-RFID sensors   High-throughput monitoring   Sewer blockages   Surface flow rate  

摘要： Sanitary and stormwater sewers are buried assets that play important roles in the prevention of dis-eases and the reduction of health risks for our societies. Due to their hidden nature, these assets are not frequently assessed and maintained to optimal conditions. The lack of maintenance can cause sewer blockages and overflows that result in the release of pathogens into the environment. For cities, monitor -ing sewer conditions on a large-scale can be costly, time-consuming, and labor-intensive if using current low-throughput technologies, such as dye testing or closed-circuit television. Alternatively, smart sensor systems can provide low-cost, high-throughput, and automatic data-driven features for real-time moni-toring applications. In this study, we developed ultrahigh-frequency radio-frequency identification (UHF RFID)-based sensors that are flushable and suitable for sanitary and stormwater pipes quick surveys. 3D printed RFID sensors were designed to float at the water-air interface and minimize the water inter-ference to RF signal communications. The optimal detection range was also determined to support the design and installation of the reader in various utility holes. Field trials demonstrated that the UHF RFID system is a low-cost, high-throughput, and robust solution for monitoring blockage, illicit-connection, and water flow in sewer networks. (c) 2021 Elsevier Ltd. All rights reserved.

关键词： Carrier leakage   UHF RFID   carrier suppression   antenna feeder  

摘要： The carrier leakage is the key factor that limits the performance of ultra-high frequency radio identification (UHF RFID) reader in high-power transmission mode. The relationship between phase noise suppression and path delay of the carrier leakage is discussed in this work. It is indicated that the suppression degree of the carrier leakage varies periodically with the carrier's transmission path delay. A novel suppression method of the carrier leakage by adjusting antenna feeder's length is proposed. The experimental results are provided to verify the feasibility and correctness of the method.

关键词： RFID   WSN   嵌入式   冷链运输监控系统  

摘要： 目前,人们的生活购物方式发生了巨大的变化,越来越多的线下需求开始被线上需求所取代。该项目设计了一个基于STM32的生鲜冷链快递运输监测控制系统,该系统能够实现对不同保温箱的独立控制,可同时输送不同的保温介质和温度,为不同产品小批量运输提供了新型保鲜运输方式。该系统可应用在快递行业中,弥补现今快递行业在中长途运输中无法运输小批量、多种类的生鲜食品的缺点。

关键词： RFID技术   空调   混流生产  

摘要： RFID技术应用于空调混流生产线,将硬件采集设备分布安装于线体各个岗位,实时采集混流空调产品的生产过程信息,提升线体生产柔性。对于种类繁多的客户化空调,零部件物料、操作工艺、设备参数等均有差异,通过建立完整的生产过程基础数据库,应用RFID系统实现混流机型快速转机切换,提升混流生产线工作效率。RFID软件平台与MES、ERP等系统互联,实现系统集成,有效提升混流生产线信息管控水平,确保公司产品质量。

关键词： 有源RFID模组   近场通信   低频唤醒   接收电路   双模式通信   点对点通信   广播通信  

摘要： 为解决电力系统设备运行及存储过程中因数量庞大、分布不定等特点引起的失管、失控以及无线监管设备的待机功耗问题,文中将近场通信与低频唤醒技术相结合,提出了一种既可以近场通信方式点对点通信、又可以广播方式批量通信的低功耗有源RFID模组设计,并在软件上使用AT指令进行封装以提高其易用性。通过对比模组应用前后电流消耗,结合应用实例证明了该模组的实用性与可行性。

关键词： 物联网   RFID   资产管理   定位系统  

摘要： 目前,随着物联网和互联网技术的飞速发展,物联网和互联网相结合的技术在各种工作和生活领域中得到广泛的应用。资产智能化管理系统综合运用射频识别(Radio Frequency Identification,RFID)技术和北斗定位技术,对需要管理的资产进行集中并智能化的管理。对于固定资产使用RFID标签进行每一件资产的编号,系统对资产进行统一的入库、出库和维护管理操作。对于流动性的资产需要配合加装北斗系统和RFID标签进行管理,系统不仅会监控流动性资产的基本信息还需要监控实时的位置信息。另外,为了便于用户进行智能化的资产管理,采用B/S结构搭建一套Web系统提供可视化的界面操作,用户可以通过对前端的界面进行功能操作来达到灵活管理资产的目的。为保证系统数据安全,系统还需要拥有数据实时存储功能,以确保资产数据完整。