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关键词： 物联网   安全机制   射频识别  

摘要： 文章阐述物联网射频识别技术安全机制研究的意义,分析射频识别技术的安全问题,提出物联网射频识别技术安全机制保护策略。

关键词： RFID   STC89C52   步进电机   自动分拣  

摘要： 针对图书分拣工作耗费大量人力且较容易出错的问题,设计一款小型自动图书分拣装置。装置以条形码扫描枪识别图书信息,利用单片机、步进电机、直流减速电机和光电传感器相互配合,实现在没有人工参与的情况下,完成对图书的自动分拣,提高图书分拣效率,降低分拣出错率,减少图书馆人力投入。

关键词： 射频识别技术   物联网   网络接入   全球定位系统   激光扫描器   红外感应器   智慧机场   Internet  

摘要： 1物联网的定义与层级物联网(The Internet of Things,简称IoT)是指通过信息传感器、射频识别技术、全球定位系统、红外感应器、激光扫描器等各种装置与技术,实时采集任何需要监控、连接、互动的物体或过程,采集其声、光、热、电、力学、化学、生物、位置等各种需要的信息,通过各类可能的网络接入,实现物与物、物与人的泛在连接,实现对物品和过程的智能化感知、识别和管理。

关键词： RFID标签   数字化转型   ISO/IEC   电子纸   读写器   零售行业   通信标准   更换电池  

摘要： 凸版印刷株式会社开发了无需更换电池或充电等维护工作的免电池可视化RFID(无线射频识别)标签“Near cross■D2.9”,2020年8月底开始向制造、流通及零售行业提供。“Near cross■D 2.9”属于高频段RFID,可与多用于生产现场的通信标准ISO/IEC 15693兼容,因此可在现有的读写器上进行阅读和改写。

关键词： 物联网   土壤样品库   射频识别   气动传输   智能存取  

摘要： 为满足国家土壤样品制备与流转中心(华北分中心)及北京市土壤样品库的流转与存储需求,采用了一种基于物联网的智能土壤样品库建设方案。通过射频识别、气动传输、智能存取、信息关联与信息管理系统等技术手段,除可满足国家土壤环境监测样品制备、流转和质量控制的基本需求外,实现了对暂存土壤样品和长期保存土壤样品的智能化、自动化、信息化和规范化保存。该样品库的建设实践为环境样品的智能化、自动化和信息化存储提供了全新的方案,其设计思路可为各部门土壤等环境样品库的建设和管理提供借鉴。

关键词： Device-free localization   radio tomographic imaging (RTI)   scanning circle link analysis   random forest classifier  

摘要： RFID, a key enabling technology of Internet of Things (IoT), has a broad development prospect in the device-free localization (DFL). The RFID-based radio tomographic imaging (RTI) method has received great attention from scholars, owing to its properties of good real-time performance, low computational complexity, high localization accuracy. However, RTI suffers from the influence of multipath and noise, which results in the artifacts and false targets appearing in the imaging result and, in turn, decreases the positioning performance significantly, especially when there are multiple targets. Therefore, how to recognize the locations and number of true targets from the imaging result becomes an urgent problem in multi-target positioning. To solve this problem, we propose a novel scanning circle link analysis (SCLA-RTI) method to eliminate false targets and locate real targets in UHF RFID scenario. First, scanning circle method is introduced to detect the line-of-sight (LOS) links through the detecting region of the local maximum pixel in the imaging result. After feature analysis and selection of the RSS change of links, the random forest classifier is used to determine the location and number of real targets. Experiments demonstrate that SCLA-RTI method has superior performance in an indoor environment, which can accurately identify true and false targets and obtain high localization accuracy.

关键词： RFID技术   高校   图书馆管理   应用  

摘要： 高校图书馆为教师教学以及科研工作进行奠定了重要的基础,也为学生提供了学习场所,它的重要性不言而喻。文章主要分析了RFID技术它的使用优势,针对现有的功能模板,充分挖掘RFID技术在高校图书馆中的应用途径,针对RFID技术在今后图书馆管理中更好的发展给予方向。

关键词： Horizontal cut imaging   material identification   multipath suppression   phase and RSS measurements   RFID  

摘要： Material identification and target imaging play an important role in many applications. This paper introduces TagScan, a system that can identify the material type and image the horizontal cut of a target simultaneously with cheap commodity Radio-Frequency IDentification (RFID) devices. The key intuition is that different materials and/or target sizes cause different amounts of phase and RSS (Received Signal Strength) changes, when radio frequency (RF) signal penetrates through the target. Multiple challenges need to be addressed before we can turn the idea into a functional system, including (i) indoor environments exhibit rich multipath which breaks the linear relationship between the phase change and the propagation distance inside a target;(ii) without knowing either material type or target size, trying to obtain these two information simultaneously is challenging;and (iii) stitching pieces of the propagation distances inside a target for an image estimate is non-trivial. We propose solutions to all the challenges and evaluate the system's performance in three different environments. TagScan is able to achieve higher than 94 percent material identification accuracies for 10 liquids and differentiates even very similar objects such as Coke and Pepsi. TagScan can accurately estimate the horizontal cut images of more than one target behind a wall.

关键词： 射频识别(RFID)   天线小型化   定向辐射   环形天线  

摘要： 设计一种应用于超高频射频识别(UHF RFID)阅读器的小型化定向性环形天线.天线由分别印制于两层介质板上的辐射贴片和接地面组成,辐射贴片为弯折的环形结构,两个矩形寄生单元放在环形内部通过探针短接到地,接地板内部开一圆环形槽.天线总体尺寸为0.275λg×0.275λg×0.05λg(λg为中心频率915 MHz对应的波长).实测结果表明,S 11≤-10 dB的阻抗带宽为10.2%(890~986 MHz),增益为4.4 dBi.该天线在接地面仅略大于辐射贴片情况下实现了较好的定向性,结构简单,尺寸小,适合应用于特定环境RFID系统中.

关键词： 物联网   RFID   UWB   综合监测   LoRa  

摘要： 阐述RFID、UWB、Lora、电力传感器、无线传感网、人工智能、边缘计算等技术手段的应用,全面接入电缆、通道、六防监测、运检实况监测信息,实现电缆综合监测、采集、传输标准化,构建电缆设备物联网,从而实现设备立体感知、通道全景监控、数据云边处理、状态辅助预判、安全智能管控、运检效益提升。