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关键词： Corrosion monitoring   RFID sensors   prestressed concrete bridge   cables  

摘要： This article investigates the RFID technology for corrosion monitoring of prestressed concrete structures. Common corrosion detection methods are time-consuming and expensive, leading to challenges in early detection, especially in inaccessible areas. RFID technology offers advantages such as wireless operation, small size, and easy integration. The present paper aims at applying RFID corrosion sensors to the monitoring of steel strands used in prestressed bridges. As it will be shown, corrosion of both steel strands and sensitive parts of sensors is governed by localized corrosion. When the depth of pits become higher than 150 m on the steel strands, an alert is triggered by sensors. With this alert, maintenance actions can be planned. The paper also validates the radio-frequency communication with sensors embedded within a High-Density Polyethylene (HDPE) sheath through in-situ testing. It is proved that embedded sensors in HDPE sheath can be manually interrogated by operators during inspections with a reading distance of 25 cm or more, depending on the location of the sensors with respect to strands. These findings highlight the interest of the method and contributes to the advancement of corrosion monitoring strategies for prestressed bridges, enabling improved maintenance practices and extended durability.

关键词： Liquids   Sensors   Monitoring   Accuracy   Integrated circuits   Real-time systems   Antennas   RFID tags   Impedance   Containers   Liquid level monitoring   multidimensional matrix topological mapping reconstruction (MMTMR) algorithm   radio frequency identification (RFID)   real time   received signal strength indicator (RSSI) and phase  

摘要： This article presents a novel liquid level monitoring system based on passive ultrahigh-frequency (UHF) radio frequency identification (RFID) technology, which is designed to provide low-cost, real-time monitoring. The system uses a novel RFID tag: the front side is used as a sensing tag for liquid level detection, and the back side is used as a reference tag for environmental sensing. Compared to the traditional dual-tag system, this system uses the same two tags, simplifying the design and reducing costs. To improve the measurement accuracy and stability, a multidimensional matrix topological mapping reconstruction (MMTMR) algorithm is proposed, which integrates multiple data dimensions, including collection time, frequency points, experimental conditions, characteristic parameters (the received signal strength indicator (RSSI) and phase of the two tags), liquid level, and number of repetitions, to establish a reliable correlation between the liquid level and the collected data. Experimental results under quantitative, random, and dynamic conditions show that the system is highly adaptable to environmental changes, with a relative error of less than 8.95% and a relative standard deviation (RSD) of less than 3.26%. Compared to the state of the art, the system reduces measurement errors by 4.39%, solving the problems of existing RFID sensors and providing a practical, reliable, and cost-effective solution for various applications.

关键词： visually impaired assistive system   indoor path finding   RFID   unmanned ground vehicle  

摘要： This paper proposes a solution for guiding visually impaired people to reach predefined locations marked with preregistered passive ultra-high-frequency RFID tags inside public buildings (e.g., secretary's offices and information desks). Our approach employs an unmanned ground vehicle guidance system that assists customers in following predefined routes. The solution also includes a methodology for recording the best routes between all possible locations that may be visited. When reaching the destination, the system will read the tag, extract all the associated information from a database, and translate it into an audio format played into the user's headphones. The system includes functionalities such as recording and playback of prerecorded routes, voice commands, and audio instructions. By describing the software and hardware architecture of the proposed guiding systems prototype, we show how combining ultra-high-frequency RFID technology with unmanned ground vehicle guiding systems equipped with ultrasonic, grayscale, hall sensors, and voice interfaces allows the development of accessible, low-cost guiding systems with increased functionalities. Moreover, we compare and analyze two different modes of route recording based on line following and manual recording, obtaining a performance regarding route playback with deviations under 10% for several basic scenarios.

关键词： 系统管理   机场弱电智能化系统   BIM技术   RFID技术   机场管理   机场弱电  

摘要： 在机场弱电智能化系统中的各网络设备带来巨大的流量负载，在航班集中起降时段，受到网络连接不稳定，提高了信息在获取与传输过程中的损失率。为了缓解这一问题，本研究探讨了BIM与RFID技术在机场弱电智能化系统管理中的应用。首先，采用三维扫描设备获取点云数据，经过三维匹配及梯度加权处理后，建立机场弱电智能化系统BIM模型，使得系统中的信息具有准确的载体，避免信息在转换或传达过程中的损失；然后，根据RFID读写器的基准信号强度等参数，确定RFID标签的部署方案，使系统中的各个元素均能够被精准定位，降低因网络传输不稳定而导致的位置信息丢失的风险；最后，结合读写的标签信息，计算出每个标签对应的距离定位信息，并将该信息集成到BIM模型中，减少信息损失，以此实现机场弱电智能化系统的管理。实验结果显示：该方法在机场弱电智能化系统的实际管理工作中，表现出了更优的管理效果，信息损失率较低，满足了机场弱电智能化系统的应用管理需求。

关键词： array configurations   chipless radio frequency identification (RFID)   detectability   detection performance   radar cross section (RCS)  

摘要： The accurate detection and reliable performance of chipless radio frequency identification (RFID) tags and sensors present significant challenges due to their inherently low radar cross section (RCS) and pronounced mutual coupling effects. These limitations adversely influence the quality (Q) factor and overall detectability, complicating the optimisation of chipless RFID systems for practical applications. This study investigates the performance characteristics and trade-offs among RCS, Q-factor, and detectability in Pi-shaped array configurations of chipless RFID tags. A comprehensive analysis of various array configurations is conducted, supplemented by a link budget evaluation to elucidate how different array structures impact system performance. The simulation results reveal that planar arrays outperform linear arrays in both RCS and Q-factor, highlighting essential trade-offs between tag identification range and angular coverage, which are influenced by array size and electromagnetic coupling. The findings emphasise optimising resonance quality and scattering efficiency to tailor chipless RFID systems for specific application requirements. This research provides valuable insights into the design and operation of chipless RFID arrays, contributing to their advancement in practical applications.

关键词： 核电档案   单标签RFID   分类管理   优化策略  

摘要： 文章针对核电档案管理的复杂性和安全性需求,探讨了基于单标签RFID技术的分类管理优化路径。通过分析核电档案管理在技术实施、管理及安全保障方面存在的痛点,提出以下优化策略:运用标签绑定技术提升分类精准度,通过多维细化完善分级管理体系,借助流程再造提高管理效能以及构建权限管控强化安全保障。研究结果表明,单标签RFID技术的应用能够显著提升核电档案分类的自动化水平和精确性,改进分级管理体系,支持档案全生命周期的动态更新与高效管理,有效降低信息泄露风险。在提升管理效率和安全性的同时,本研究为核电档案智能化管理提供了技术实现方案,彰显了信息化技术在高敏感领域档案管理中的重要价值。

关键词： 数字孪生技术   电力设备   RFID传感器   数据可靠性  

摘要： 基于环境干扰、传感器故障、数据传输错误等原因,电力设备RFID传感器数据可能存在噪声、漂移或失真,无法确保传感器数据的可靠性。为此,提出了基于数字孪生技术的电力设备RFID传感器数据可靠性分析方法。通过分析RFID传感器的热传导路径以及接触电阻,构建传感器孪生模型,实现对传感器内部温度场的分析。在此基础上,从时间和空间两个维度选取传感器数据可靠性分析指标,结合数字孪生模型输出数据的置信度,对数据可靠度进行计算。实验结果表明,本方法对传感器数据的可靠性评估期望误差值较低,能够有效提高电力设备RFID传感器数据可靠性分析精度。

关键词： RFID   智慧室分   信号覆盖   建设方案  

摘要： 智慧室分是中国移动研究院推出的一种创新的室内分布系统解决方案,它结合了现代通信技术和智能硬件技术,能提供更加智能和高效的室内网络服务。近年来,移动通信网络技术快速发展,移动通信用户需求不断变化,室内移动通信业务量增长很快,基于射频识别(RFID)和蓝牙信标(BLE)技术的智慧室分系统(SmartDAS)则成为了解决建筑室内信号覆盖和提供室内分布建设的重要工具。文中分析了智慧室分的主要功能和应用,对室分建设和室内信号覆盖中遇到的一些技术问题进行了探讨,并提供了解决方案。

关键词： 煤矿机电设备   射频识别(RFID)技术   运行监测   系统设计  

摘要： 针对煤矿设备管理中存在的监测问题,旨在探究射频识别(RFID)技术在煤矿机电设备运行监测领域的运用。设计一套基于RFID技术的运行监测系统,该系统利用RFID技术实时获取设备数据,全面且高效地监控煤矿机电设备的运行状态。实际应用表明:该系统显著提升了设备的使用效率和安全性,有效降低了设备故障率,进而增强了煤矿的整体生产效率。基于RFID的煤矿机电设备运行监测系统在确保煤矿安全生产和提升运营效率上表现出突出优势,具有广泛的应用潜力。

关键词： 保温杯垫   附件装配   S7-1500 PLC   RFID   ABB机器人   控制与调试  

摘要： 以保温杯垫智能生产线的附件装配站设备为控制对象,选用西门子S7-1500系列PLC为核心控制器,通过Profinet协议实现现场设备与上层PLC控制系统进行数据交换和通信;开发完成了附件装配站的PLC程序与上位触摸屏的操作界面,并进行了三个月的现场设备测试运行与调试。测试结果表明,该控制系统具有操作简便、运行稳定等优势,大大提高了企业生产效率。具有较高的市场推广应用价值。