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关键词： RFID   Composite laminates   Damage   C -scan   Acoustic emission   DIC  

摘要： RFID (Radio Frequency Identification) is commonly used to monitor goods along the supply chain. The feasibility of the application of a RFID tag to monitor CFRP components was demonstrated in a previous work by some of the authors. This work is aimed at evaluating how the integration of a RFID tag inside a CFRP laminate affects the quasi -static strength and the failure mode. Finite element modelling is used to design a specimen with an embedded tag, that may be representative of the tensile state of stress in a larger laminate. Tensile testing is performed both up to failure and by interrupting tests at different load levels in order to inspect the specimen by C -scan. Acoustic Emission (AE) and Digital Image Correlation (DIC) are used as additional non-destructive monitoring techniques. Some interrupted tests were selected to extract micrographic sections that illustrate damage development in the laminate. The extensive destructive and non-destructive characterization allowed to quantify the effect of embedding a RFID tag in the laminate in terms of strength decrease and failure mode.

关键词： ANNs   RFID   Passive UHF RFID tags   RN16   RSSI  

摘要： Radio frequency identification (RFID) technology has been widely used in applications such as access control, inventory management, spatial positioning, and object identification. Accurate tag estimation is one of the major challenges in RFID reader systems particularly in areas where large tag populations are to be identified such as shopping carts, warehouse inventory monitoring, and small ruminant farms. This paper proposes a new tag estimation technique employing artificial neural networks (ANNs) and signal strength to read large tag populations. The technique estimates the number of tags through the signal strength of the backscatter channel for efficient implementation of dynamic framed slotted Aloha (DFSA) protocol by analyzing the RN16 and the received signal strength indicator (RSSI). The ANN model is trained using the signal strength of various tag populations and can identify the number of tags with minimal errors. The proposed technique does not require any modification in the tags and is implemented as a minimal software script to be added to the tag estimation module of the reader. The proposed signal strength-ANN model is able to estimate the accurate number of tags thereby improving the performance of the employed DFSA model.

关键词： IVF laboratory   Safety   RFID tag   Workflow-based management   Real-time information entry  

摘要： BackgroundDual-person inspection in IVF laboratories cannot fully avoid mix-ups or embryo transfer errors, and data transcription or entry is time-consuming and redundant, often leading to delays in completing medical *** study introduced a workflow-based RFID tag witnessing and real-time information entry platform for addressing these challenges. To assess its potential in reducing mix-ups, we conducted a simulation experiment in semen preparation to analyze its error correction rate. Additionally, we evaluated its impact on work efficiency, specifically in operation and data entry. Furthermore, we compared the cycle costs between paper labels and RFID tags. Finally, we retrospectively analyzed clinical outcomes of 20,424 oocyte retrieval cycles and 15,785 frozen embryo transfer cycles, which were divided into paper label and RFID tag *** study revealed that comparing to paper labels, RFID tag witnessing corrected 100% of tag errors, didn't affect gamete/embryo operations, and notably shorten the time of entering data, but the cycle cost of RFID tags was significantly higher. However, no significant differences were observed in fertilization, embryo quality, blastocyst rates, clinical pregnancy, and live birth rates between two *** tag witnessing doesn't negatively impact gamete/embryo operation, embryo quality and pregnancy outcomes, but it potentially reduces the risk of mix-ups or errors. Despite highly increased cost, integrating RFID tag witnessing with real-time information entry can remarkably decrease the data entry time, substantially improving the work efficiency. This workflow-based management platform also enhances operational safety, ensures medical informational integrity, and boosts embryologist's confidence.

关键词： Sustainability goals   Customer Satisfaction   Internet of Things (IoT)   NFC   RFID  

摘要： In the Industry 4.0 (I4.0) era, emerging technologies positively affect sustainability both internally within the industry and externally at the global level. Sustainable productive systems are expected to be with the best indicators levels through using emerging technologies in the I4.0. This study aims to investigate the effect of emerging technologies in the I4.0 on the sustainability pillars through an analysis of a case study conducted at King Saud University about a Smart Yogurt Filling System. In this system, the most critical emerging technologies, such as Internet of Things (IoT), 3D printing, Near field communication technology (NFC), and Node-RED, were applied. A unique framework for the study was developed. The study demonstrated both successful implementation of sustainability goals and the challenges encountered during the process. According to the current study, I4.0 emerging technologies enhance customer satisfaction, reduce time and effort, error rates, and minimize many other types of waste, enabling the presentation of custom products to customers. They also reduce human intervention to its minimal necessities, improve ergonomics, and connect valuable cyber-physical objects for seamless collaboration across the value chain.

关键词： 射频识别   无源物联网   识别距离  

摘要： 超高频RFID技术是采用反向散射实现信号传输的无源物联网技术。在超高频RFID系统工程方案设计中最主要的问题是如何选择设备及核定设备安装位置,涉及到识别距离的计算。本文首先从系统工作原理出发,推导出识别距离的计算公式,梳理超高频RFID系统中识别距离的影响因素,计算主要系统参数对识别距离的影响。通过分析发现,提高发射功率、天线增益、读写器灵敏度等参数指标能提高系统识别距离,而标签灵敏度的提高能增大正向识别距离,但会导致反向识别距离减小。本文的分析结果对无源物联网工程方案设计具有现实指导意义。

关键词： 无线射频识别技术   定位   单片机   数据库  

摘要： 随着信息技术的不断进步和医疗设备日益智能化,无线射频识别技术(RFID)已在医疗设备管理中发挥着重要作用。RFID技术以其高效、精确和实时的特性,实现优化医疗设备管理流程,提高设备管理工作效率的目的。该研究基于此技术设计了1种医疗设备定位系统,包括硬件1套、软件2个,可实现对设备所在区域的实时定位和查询功能。

关键词： 结构健康监测   标签阵列   金属表面裂纹监测   射频识别  

摘要： 针对金属表面裂纹的多特征监测问题,提出了一种基于射频识别(Radio Frequency Identification, RFID)技术的裂纹多特征监测方法。首先,设计了一种RFID标签阵列,通过裂纹影响标签反射信号的相位特征来感知裂纹特征。然后,设计了一种基于几何法的裂纹粗定位算法,利用粗定位结果结合指纹法进行细粒度定位,计算得到裂纹的方向、位置和宽度。最后,通过在不同标签阵列密度以及指纹密度的情况下进行仿真,并进行真实实验来验证该算法的有效性和准确性。仿真及实验结果表明,与传统RFID指纹法相比,所提方法能有效降低裂纹多特征监测误差。

关键词： RFID   射频读卡器   在线升级   密钥   .map文件  

摘要： 通过研究医疗检测设备仪器中用于体外诊断样本数据追踪功能的RFID读卡器在读样本标签数据时出现读卡失败的情况,对在线射频读卡器硬件组成和软件系统程序逻辑设计,以及读卡器和标签中的密钥存储位置和交互验证过程进行分析,同时对实际读写卡过程中的软件操作方式及读卡器和标签的应答模式进行总结,通过对比编辑器产生的.map文件,查询并验证导致存储区域密钥常量发生修改的根本原因。结果表明,在程序跳转过程中,由于引导程序中定时器中断向量未及时关闭,导致变化的中断运行变量将系统密钥内存常量进行修改,出现密钥验证失败导致读卡数据失败的问题,通过及时关相应中断的方法,解决读卡数据失败的问题,保证诊断检测设备数据追踪的稳定运行。

关键词： RFID温度标签   变电站   装配式线缆槽盒   特征提取   温度监控方法  

摘要： 由于红外测温仪和温度传感器在采集温度数据时会出现偏差,且监控方法能耗较高。对此,提出基于RFID温度标签的变电站装配式线缆槽盒温度监控方法。设计一种RFID温度标签,采集变电站装配式线缆槽盒温度数据,并实施数据清理以及数据变换预处理。结合关联维提取预处理好的温度数据特征。通过计算异常指数,判断变电站装配式线缆槽盒温度异常状态。结果表明:与基于红外测温仪的监控方法和基于温度传感器的监控方法相比,所研究的方法采集数据与真实数据的拟合度更高,达到0.9852,说明采集数据更为准确,该方法更能维持长时间的监控工作。

关键词： 智能网联汽车   电子标识   射频识别   测试方法  

摘要： 随着智能网联技术的发展,智能网联汽车电子标识技术可突破原有交通信息采集技术的瓶颈,实现对车辆信息实时监控和管理。目前,智能网联汽车面临准入工作,亟需一套针对智能网联汽车电子标识的测试方法。本文基于射频识别试验方法,提出针对智能网联车牌电子标识的测试方法,给出智能网联汽车电子标识的5个指标的试验方法,并通过实车测试手段,验证了方法的有效性和合理性,且测试结果均满足。