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关键词： 室内 5G 分布   DAS   故障维护   RFID 技术  

摘要： 近年来,随着新一代移动网络通信技术的飞速发展,移动数据流量极速增长。根据场景模型分析,有 70% 以上的通信业务发生在室内,室内信号质量的优劣将直接决定业务的发展。文章分析了室内分布系统的维护现状及管理痛点,在此基础上,提出了基于 RFID 技术的智慧室分解决方案,通过读取安装在室分天线上的电子标签,实现了对整个室分链路的质量评估及监控,解决了无法及时发现无源室分天馈系统故障与上报的问题,缩减了故障排查时间,提升了用户感知、室分系统运行维护价值和工程建设价值,便于资产化管理。

关键词： 港口   自动化轨道吊   RFID系统   集卡车号  

摘要： 为实现全自动化轨道吊在装卸集装箱时能够自动识别装卸区域的集卡车号,采用无线射频识别技术来实现该功能。轨道吊的RFID系统由标签卡片、天线、阅读器和工控机等组成。安装在轨道吊横梁上的RFID读卡器通过天线和馈线读取装卸区域内的集卡标签信息,并将信息传至轨道吊电气房内的工控机进行识别和解码,再与轨道吊上的PLC系统实现信息交换验证后确认集卡作业指令,实现了轨道吊全自动化识别集卡车号作业的功能。RFID全自动识别集卡车号技术在轨道吊上的应用,提高了集装箱码头集卡作业的准确性和效率。

关键词： RFID技术   RFID系统安全隐患   安全方案  

摘要： 随着物联网的成熟发展,无线射频识别技术(Radio Frequency Identification, RFID)在物联网相关技术中扮演着至关重要的角色。在万物互联的时代,对RFID技术的应用日益广泛,针对该技术的研究也逐渐受到学者们的广泛关注。然而RFID技术在系统应用的过程中,仍面临了种类繁多的安全隐患,因此,本文对RFID技术面临的安全隐患进行了概述与分析,对未来RFID技术的发展有着重要意义。首先,本文总结了应对RFID技术各类隐患的RFID技术安全方案,主要分为物理安全方案和密码学相关方案。其次,分析了现有结合了密码学相关方案的RFID技术的认证协议。最后,对RFID技术的应用前景与发展趋势进行了总结展望。

关键词： 射频识别(RFID)   Wi-Fi   Flask   考勤  

摘要： 考勤是学校的重要教学活动之一,传统考勤方式存在效率低、信息管理不方便等问题。针对上述问题,基于射频识别(Radio Frequency Identification,RFID)和Wi-Fi技术研究与设计了一款服务器/客户机(Client/Server,C/S)结构的高效考勤系统。客户端通过RFID模块采集学生的校园一卡通卡号,并通过Wi-Fi模块将信息传输到服务器端。服务器端基于Windows系统,采用跨平台性良好的Python语言,通过Socket通信技术接收学生校园一卡通卡号实现考勤的同时,使用Flask Web框架结合数据库技术,实现考勤信息的可视化管理。设计系统界面友好,操作简易。

关键词： 射频识别   钻具管理系统   信息采集   环形阵列天线  

摘要： 为了提高钻具管理的信息化水平,研究了基于RFID技术的钻具信息采集管理系统。选择适用于钻杆的超高频RFID标签作为信息载体,采用有限元方法分析了标签安装孔对钻杆强度的影响;以超高频RFID读取技术为基础,构建了环形阵列天线结构的信息采集硬件系统,天线阵列发出的读写信号能够全向覆盖钻杆;采用.NET技术构建远程信息管理系统,实现了钻具信息采集、存储的远程无人值守;环形阵列天线及读写器安装在钻井平台下方,起下钻作业时钻杆穿过环形阵列天线,即使不知道RFID标签埋入位置也能采集到钻杆信息,通过Web端即可管理钻杆信息。试验结果表明,在RFID芯片位置未知的情况下,钻杆以0~2.00 m/s的速度运动时,系统能准确无遗漏地采集钻杆信息。基于超高频RFID技术的钻杆管理系统的研制,为石油钻具管理信息化提供了有效途径。

关键词： RFID   土壤盐分   新型农业   传感器  

摘要： 设计和分析一种用于土壤水分和盐度检测的廉价新型RFID传感器。在UHF上设计的RFID波段,可以很容易调整到核心芯片。同时还模拟不同湿度和盐度水平的土壤理论模型,用自制的样机测量沙质土壤中水分和盐度的变化。模拟结果和实测结果均在非盐水条件下显示,传感器共振频率随含水率变化而变化。如果土壤含盐,共振振幅随着盐度的增加而降低,并表现出与含水量无关,没有频率变化。

关键词： 精细饲喂   STM32   RFID   数据库   上位机  

摘要： 将物联网技术应用到传统养猪场,设计了养猪场群体精细饲喂控制系统。在猪场内布置节点对环境的温湿度、氨气浓度、排泄池水位、生猪体温等信息进行采集,并由STM32处理器作出处理。利用RFID、自动称重传感和温度传感等技术对生猪的采食次数、时间、采食量、日增质量、料肉比进行测定,采集到的信息保存到数据库中。对数据进行记录和统计,可以形成猪日生长性能报告。使用VS2017开发了上位机,养殖人员既可以查询信息,查看猪场监控视频,也能够在上位机端进行操控,遇特殊情况可以启动报警。经测试,系统工作稳定,对于提高生猪养殖的科学化、自动化水平具有重要意义。

关键词： RFID   Chipless   Printability   Sensors   Radar cross-section (RCS)  

摘要： This paper presents a printable 30-bit Chipless RFID tag that offers a better-read range. The tag structure consists of two different triangular patches arranged in a fan-shaped assembly enabling the tag suitable for a higher read range. The proposed tag is analyzed for several substrates, i.e., Taconic (TLX-8), Rogers RT/Duroid (R) (5880), PET, and Kapton (R) HN;so that tag can be used in different environmental conditions. The tag is optimized on Dupont Kapton (R) HN along with silver nanoparticle ink as a radiator. The 55.3 x 55.3 mm2 tag is designed to operate in a frequency band of 2.63-9.22 GHz. Silver nanoparticle-based ink is used for the easy printability of the tag. Along with the enhanced read range feature, the Kapton (R) HN-based tag exhibits the humidity sensing feature and can be the best choice for low-cost item tagging.

关键词： RFID   Authentication   Healthcare   Security   Anonymity   Untraceability  

摘要： Over some past decades, the data related to traditional medical privacy and many other similar cases are at serious risk of disclosure by a third party or an adversary. The risk of personal medical privacy data leakage by some insurance companies can disrupt the healthy environment of medical health industries as well as compromise the privacy of individuals. With the rapid evolution of Machine-to-Machine and Device-to-Device communication making our lives convenient, there has been an tremendous growth in the utilization of numerous Internet of Things (IoT) applications such as smart infrastructure, smart e-healthcare, smart cities, smart grid, smart governance, smart education, and many others. Nowadays, Radio Frequency IDentification (RFID)-enabled system is getting popular for privacy protection in healthcare systems, where RFID tags play a vital role in healthcare. Although, an adversary may tamper with the information of an RFID tag, compromise privacy along with increase forgery cases. To solve such issues, we propose an RFID-enabled authentication protocol for IoT healthcare environment based on a vector space approach to guarantee security in the healthcare system. We present a formal security analysis for the validation of our proposed protocol using BAN inference rules. The security analysis has been done to meet various security requirements such as tag location privacy, untraceability of the RFID tags, and tag anonymity. The performance security demonstrates that our protocol performs better in terms of computation and communication cost on comparing with other existing protocols.

关键词： Metal-mountable antenna   planar patch antenna   tuning method   ultrahigh-frequency (UHF) tag antenna  

摘要： A single-layer patch antenna, which is constructed using two complementarily placed C-shaped patches, has been proposed for designing a metal-mountable tag with a wide range of frequency tuning capability. The two patches are closely coupled for generating sufficient antenna reactance, which is in turn employed as a tuning mechanism. With only the employment of this tuning mechanism, the tag's resonant frequency can be successfully tuned over a broad range covering 920 MHz-1.18 GHz without using any other external lumped components, shorting stubs, or vias. Good read performance is sustainable as the tuning can be performed without changing the antenna structure much. A transmission line model has also been constructed for the design and characterization processes. The proposed tag is compact (0.154 lambda x 0.154 lambda x 0.010 lambda), and it can be read from similar to 9 m with 3.28 W effective isotropic radiated power (EIRP).