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关键词： RFID 无源测温系统   特殊环境   抗干扰设计   性能验证   电磁干扰  

摘要： 在工业生产、医疗、科研这些领域,特殊环境里对温度精确监测的需求不断增长。RFID无源测温系统因无需外接电源、易于部署等特点,成为特殊场景测温的不错之选。但特殊环境存在强电磁干扰、高温、高湿度等复杂状况,限制了系统稳定运行和测量精准度。文章基于此情形,深入开展特殊环境下RFID无源测温系统的抗干扰设计研究,从硬件、软件多个层面提出创新策略。通过严谨的性能验证实验,旨在证实所设计系统在特殊环境中的抗干扰能力与测温性能有明显提升,为该系统广泛应用奠定技术基础。

关键词： Sensors   Humidity   Intelligent sensors   Radiofrequency identification   Resonant frequency   Chipless RFID   Permittivity   Humidity measurement   Testing   Semiconductor device measurement   Artificial intelligence (AI)   auto identification and data capture (AIDC)   chipless radio frequency identification (CRFID)   industrial Internet of Things (Ilott)   internet of everything (IoE)   radio frequency identification (RFID) tag   relative humidity (RH) sensing   ultra-high frequency (UHF)   wireless sensor network (WSN)  

摘要： Design and development of a novel smart chipless humidity sensor tag has been proposed. A key approach introduced in this article for the first time is to utilize ground plane chipless radio frequency identification (RFID) tags for effective data communication having an incremental radar cross section (RCS) with 50% tag's footprint reduction. We opted for this approach to provide high performance in real-time identification tags with increased RCS values for stable threshold-level detection. We have composed a novel compact tag that can encode 18 bits in a $14\times 12.5$ mm footprint. The data is represented using 18 individual binary digits (0 or 1 s) generated via 18 resonators and slots on the top electrode layer of the tag. This study identifies an innovative solution to offset the decrease in RCS magnitude. The most significant finding from the experiments is the correlation between the ground plane and RCS parameters. The proposed tags are designed, fabricated, tested, and evaluated via experimentation. This research finds viable innovative alternatives to compensate for the loss of RCS magnitude as the most striking result emerged from the experiments in the relation between the ground plane and RCS parameters. The expected accurate measured results make the wireless smart tag as the ideal solution for humidity sensing applications. The proposed RFID sensor tag is designed for large-scale applications, utilizing an RFID reader and supporting multiple tags within the system.

关键词： 超高频射频识别   应急车辆   公交车辆   优先通行  

摘要： 针对城市交通拥堵导致应急及公交车辆通行效率低下的问题,文章提出一种基于超高频射频识别技术的优先通行解决方案。通过建立专用车辆识别系统,在确保安全的前提下实现信号灯优先控制。仿真结果表明,该方法能显著提升应急车辆和公交车辆的通行效率,同时有效降低优先通行过程中的安全隐患。

关键词： Harmonic analysis   Power harmonic filters   Sensors   Radar   Transponders   Schottky diodes   Frequency modulation   Backscatter   Target tracking   Radar tracking  

摘要： This paper provides a comprehensive analysis of recent advancements and ongoing challenges in passive harmonic RFID systems that take advantage of nonlinear operation to enable tracking, sensing, and monitoring in environments where conventional RFID systems fail. The study begins with a detailed review of the literature that highlights key trends and developments in harmonic RFID technology. Then it focusses on chipless harmonic RFID tags that are cost-effective, require no power supply, and operate through nonlinear backscattering, emphasising the main design challenges and limitations. The work further explores methodologies for enabling identification and data transmission in these systems, covering techniques used in tags designed for detection and tracking applications, as well as those meant to function as sensors. Finally, the paper suggests future research directions, emphasising the need for innovations in hybrid system designs, signal processing, and standardisation to improve the scalability and reliability of harmonic RFID systems.

关键词： 核电物资   RFID   自动盘点  

摘要： 核电物资具有库存种类多、库存量大的特点,传统的物资盘点方式占用大量人力,存在盘点效率低、盘点误差大的缺点。本文基于核电物资自动、精准盘点功能建设实际情况,介绍了自动盘点的技术选择、技术方案设计及实施、建设成果等。

关键词： 工业物联网   生产线   故障预测   RFID   传感器   机器学习  

摘要： 随着物联网技术的迅速发展,工业物联网(IIoT)将成为未来工业发展的新趋势。在此背景下,研究了基于传感器和射频识别(RFID)技术的半导体生产线设备故障预测方法。首先,使用RFID射频识别系统收集生产线上各个设备的温度、压力等参数;然后,通过机器学习算法构建故障预测模型,对设备运行状态进行分析和预测,从而为生产线管理者提供准确的设备运行状况,以便其及时有效地采取维护措施,确保生产安全、高效地进行。实验结果表明,该方法能够实现对生产线故障的精准预测,并且具有较高的准确性和稳定性。此外,该方法还可扩展到其他需要实时监测设备运行状态的场景中。

关键词： 防汛抗旱   集中储备   装备管理   智能化管理   RFID   物资管理  

摘要： 防汛抗旱集中储备装备物资管理工作是防汛抗旱的重要基础和保障,目前这一领域的智能化管理系统比较缺乏。针对目前区县防汛抗旱集中储备装备物资智能化管理的现状和存在的问题,基于物联网、RFID等技术设计了区县级防汛抗旱集中储备装备物资智能化管理系统。该系统包含装备物资统计查询、物资监控、物资盘点、供应链管理、物资管理、标签初始化、数据可视化等功能。其中数据可视化功能尤为突出,不仅能够利用RFID技术自动查找并定位标签,还实现了声光报警标签的集成应用,同时支持仓储数据的获取、仓库安防监控、门禁管理和重要物资跟踪。这一功能模块是防洪保安抗旱减灾体系的重要组成部分。该系统能够为实现指挥决策科学化、应急处置规范化、防汛抢险专业化提供有力的防汛物资储备支撑与保障。

关键词： Dual frequency resonant RFID   Gas sensor   Formaldehyde   Ammonia   Indoor air  

摘要： A dual-frequency passive radio frequency identification (RFID) gas sensor based on zinc oxide (ZnO)/molybdenum disulfide (MoS2)/tungsten trioxide (WO3)/reduced graphene (rGO) is proposed for indoor detection of formaldehyde and ammonia concentrations. The antenna model is designed on the antenna simulation software, and then, the antenna is made by the engraving mechanism. Nano-sensitive materials are prepared by the hydrothermal method to characterize the materials, and then, different combinations of materials are coated on both sides of the antenna to produce gas-sensitive sensors. The experimental results show that one frequency point of the sensor works in the range of formaldehyde concentration of 0.08-1.14 ppm, amplitude variation is 17.11 dB, linearity R2 = 0.97. The sensor operates at another frequency in the ammonia concentration range of 5-100 ppm, the amplitude changes to 12.7 dB, and the linearity R2 = 0.99. Compared with the previous gas sensors, the sensor has wide measuring range, high sensitivity, good selectivity, is lightweight and portable, and provides high anti-interference ability.

关键词： Radio frequency identification (RFID)  

摘要： In this paper, a novel ultra high frequency (UHF) radio-frequency identification (RFID) near-field reader antenna is proposed. Based on an edge-coupled spiral composite right/left-handed transmission line (ES-CRLH-TL), the antenna aims to address the misreading of tightly-placed adjacent tags in roll-to-roll fabrication, which is a common challenge for RFID printers during the customization process of RFID tags. The proposed ES-CRLH cell can concentrate and enhance the tangential electric field EY (the direction of primary polarization) by incorporating interdigital capacitors and edge-spiral line structures, while the series cell achieves a uniform longitudinal distribution. The traveling wave transmission line facilitated by the CRLH structure ensures that the reflection coefficient S11 remains below −15 dB across the entire UHF frequency band (860-960 MHz). The feasibility of the proposed design is verified through simulation and measurement of a 5-cell series antenna. The antenna can effectively discriminate tags that are in close proximity, requiring a minimum activation power for the tag of less than 0 dBm and a separation of only 5 mm between adjacent tags. The proposed antenna exhibits high coupling efficiency and spatial selectivity, rendering it suitable for printer applications with tags in worldwide bands. © 2025 Wiley Periodicals LLC.

关键词： Data carriers   Real-time monitoring   NFC   RFID   Smart packaging   Tracking technologies   QR codes  

摘要： Smart packaging represents a cutting-edge approach, incorporating various data carriers such as RFID (Radio-frequency identification), NFC (Near Field Communication), QR (Quick Response) codes, barcodes, Data Matrix codes, and Bluetooth beacons to enhance packaging functionality and interactivity. These data carriers facilitate real-time tracking, monitoring, and communication between products and stakeholders across the logistics and supply chain. Smart packaging ensures product authenticity, extends shelf life, and improves consumer engagement by integrating smart sensors and wireless communication technologies. This review examines the types of data carriers used in smart packaging, highlighting their applications, benefits, challenges, and emerging trends shaping intelligent packaging systems' future. The integration of these technologies improves logistics and inventory management, enhances consumer safety, and promotes sustainability efforts.