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关键词： 射频识别(RFID)   定位技术   优化算法   改进的鲸鱼优化算法(IWOA)   信号接收强度(RSSI)   参考标签   自适应度  

摘要： 为解决露天煤矿电缆智能化管理中的射频识别(RFID)定位问题,提出一种基于改进的鲸鱼优化算法(IWOA)优化RFID定位精确度的方法。首先,采用RFID技术定位电子标签的位置,并进行信息读取;然后,利用接收信号接收强度(RSSI)值计算出阅读器与标签之间的测量距离;最后,通过改进的鲸鱼算法优化距离误差,以迭代寻优选取的位置坐标误差值反应系统的定位精度。结果表明:利用IWOA优化后的系统平均定位误差为0.0241 m,与传统LANDMARC、差分进化(DE-RFID)、鲸鱼优化(WOA-RFID)定位方法相比平均误差更小,定位精度提高到97.8%,能够更加精准地确定电子标签的位置。

关键词： RFID技术应用   仓库RFID设备定位   精细化仓库管理   降本增效   节能减排  

摘要： 为适应高质量发展和节能减排的要求,企业越来越注重仓库管理精细化和精准化,进一步提出了对仓库中的叉车作业设备及人员的精细化管理需求,从而为货物在库流转提供更优化的路线方案规划。目前市场上常用的方法是在仓库内安装UWB定位读取设备,通过读取UWB定位标签来解决室内设备和人员的定位。但这种技术方案不仅成本高,而且施工复杂。通过大量的调查研究和试验,本文研究提出应用RFID技术的仓库设备定位解决方案。采取软件和硬件相结合,在满足仓库叉车设备定位需求的同时,整体建设方案的费用仅是市场UWB设备定位方案十分之一,有效实现了降本增效碳减排效果,同时,该方案具有施工简单,有非常强的应用推广价值。

关键词： 射频识别   Walsh同步正交码   碰撞树协议   并行识别   防碰撞  

摘要： 针对大规模标签场景下,改进碰撞树(ICT)算法中碰撞时隙较多且有多个碰撞位时无法并行识别多标签的问题,提出一种基于Walsh码的RFID并行识别碰撞树(PICT)算法。PICT算法引入Walsh同步正交码与碰撞树协议相结合,对ICT算法中发生多位碰撞时的标签使用Walsh码进行扩频,具有唯一Walsh码的标签通过不同的子信道与阅读器通信,实现多标签并行识别。理论与实验分析表明,PICT算法相比同类算法所需系统总时隙数更少,并且具有更高的系统识别率,适合大规模标签的快速识别。

关键词： 光伏电池片   RFID   信息追溯  

摘要： 针对现有光伏电池片生产中存在的数据信息采集量大、采集不方便、分析工作量大等难题,开发基于RFID技术的光伏电池片生产追溯系统。通过在电池片载体花篮上安装RFID芯片及在加工设备上安装RFID读写器,追溯电池片生产工序工位信息;通过检测模块实时检测电池片缺损并生成虚拟ID,写入RFID芯片,实现单片电池片生产数据的追踪和分析。研发出一套光伏电池片生产数据采集与运用系统,涵盖光伏电池片从物料到成品、检测、打包、入库等全过程管理环节,并与各车间的生产设备、控制系统及检测系统全面对接;系统具备大数据可视化分析和辅助决策功能,可自动完成生产数据的统计与分析,实现完整的数据链管理。目前该系统已运用于江苏多个光伏电池片生产企业,系统运行稳定。相较于传统的数据记录方式更直观、形象、便捷,优良的可读性也便于公司把握整体的生产进度,优化生产体系,创造更高效益,推动了企业智能化发展。

关键词： 图书馆   取阅系统   RFID技术  

摘要： 随着信息技术的不断发展,图书馆的取阅系统也在不断更新和改进。采用C/S架构,包含PC客户端和手持终端系统两套软件,通过利用RFID技术,图书馆可以实现个性化服务、阅读推广辅助等功能,提高服务质量和读者满意度。本文旨在探讨RFID技术在图书馆取阅系统中的应用与实现,希望能够为图书馆的现代化建设和读者的阅读体验做出一定的贡献。

关键词： 门禁系统   指纹识别   RFID   物联网技术  

摘要： 为了提高高校实验室、宿舍等场所的安全管理水平和对进出人员进行分类管理,设计开发了一种基于物联网技术的多功能门禁控制器,其提供三种解锁方式:指纹解锁、RFID卡解锁和密码解锁,三种方式解锁相关数据均通过STC89C52单片机进行分析和处理,进而判决是否解锁门禁。经测试,指纹解锁效果稳定,RFID刷卡效果灵敏,密码解锁完全正常,整体上符合预期效果,且具有较好的应用价值和意义。

关键词： 地质档案   资料管理   RFID  

摘要： 地质资料是地质工作的成果,是一种重要的基础性、公益性资料信息。传统的地质档案管理效率低下,福建省地质矿产勘查开发局资料室开发设计的基于RFID技术智能化库房管理系统,网络及硬件布设覆盖档案库房,实现档案实体智能化管理。

关键词： Microstrip antennas  

摘要： It has been observed that the polarized microstrip antenna is always an important factor for wireless communication applications. One of such antennas is very much useful for UHF trans-receiver for 4G / 5G technology and RFID applications. This paper proposes the simulation design of diagonally symmetric slotted polarized microstrip antenna at GSM frequency band especially in the range of 865 – 868 MHz. The simulated design was also fabricated. Two types of microstrip antennas were designed in which two diagonally symmetric squares and plus sign shapes were separately slotted from the each square microstrip antenna. The result so obtained from the designed antennas, provides the desired specifications which are useful for UHF wireless applications. The results from both the antennas show that the diagonally symmetric slotted shape not only provides the circular polarization but also provides better gain ranging between 4.45 dB to 4.6 dB, better return loss, axial ratio and VSWR. The specifications so mentioned perfectly match the guidelines of countries like India and most European Union countries. All the results obtained from the simulated and fabricated slotted shaped antennas were also compared in the present paper. © 2023, National Taiwan University of Science and Technology. All rights reserved.

关键词： Quality of Data (QoD)   Internet of Things (IoT)   RFID   WSN   Taxonomy   trustworthiness   outlier   anomaly   confusion matrix   QoD assurance technique  

摘要： The Internet of Things (IoT) data is the main component for finding the basis that allows decisions to be made intelligently and enables other services to be explored and used. Data originates from smart things that have the capabilities to connect and share data enormously with other things in the IoT ecosystem. However, the level of intelligence obtained and the type of services provided, all depend on whether the data is trusted or not. High-quality data is the most trusted;, it can be used to extract meaningful insights from an event and can also be used to provide good services to humans. Therefore, decisions based on high-quality and trusted data could be good, whereas those based on low-quality or untrusted data are not only bad but could also have severe consequences. The term Quality of Data (QoD) is used to represent data trustworthiness and is used throughout this paper. To the best of our knowledge, this work is the first to coin the term QoD. The problems that hinder QoD are identified and discussed. One if it is an outlier, it is a major feature of the data that degrades its overall quality. Several machine-learning techniques that detect outliers have been studied and presented, with few data-cleaning techniques. This paper aims to present the elements necessary to ensure QoD by presenting the overview of the IoT state-of-the-art. Then, data quality, data in IoT, and outliers are studied, and some quality assurance techniques that maintain data quality is presented. A comprehensive taxonomy is shown to provide state-of-the-art data in IoT. Open issues and future directions were suggested at the end of the paper.

关键词： Localization   mobile robot   radio frequency identification (RFID)   retail  

摘要： In this article, we propose an RFID-based simultaneous localization and mapping (RF-SLAM) method that allows us, for the first time, to estimate the robot's position and the tags' 3D position in the warehouse environment simultaneously without any reference tags and external sensors, using only COTS RFID device. RF-SLAM is designed to transform the RFID measurement into the relative tag position constraint and use a corresponding graph based model to solve the SLAM problem. Specifically, a multiantenna-based relative localization method using phase measurement and odometer data in a short time is proposed as the front end. The back end is a novel graph model based on the relative tags position constraint and odometer constraint. Experiments in different types of warehouses show the localization accuracy of robot and tags' 3D position is about 5 cm and 10 cm, respectively. The experimental results in a more challenging and actual environment are still competitive.