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关键词： RFID technology   logistics   adaptive taboo search algorithm   nearest neighbor algorithm   scheduling  

摘要： With the rapid growth of e-commerce, logistics companies face challenges in efficient routing and scheduling to meet dynamic delivery demands. This paper proposes a novel logistics scheduling model to optimize vehicle routing using Radio Frequency Identification (RFID) technology. A vehicle scheduling model is developed. The random customer demand and service time are solved using an adaptive taboo search algorithm combined with a nearest neighbor algorithm. Comparative experiments demonstrate the performance of the improved method in completing tasks and reducing queueing time compared to other methods. A case study of route optimization for a logistics company shows the model can recommend optimized routes that reduce total transportation cost by over 25% compared to using RFID alone. The results highlight the potential of the proposed technique to enhance logistics efficiency. Limitations and

关键词： Indoor positioning   radio frequency identification (RFID) position measurements   RFID moving antenna   RFID phased-based localization   RFID tag localization  

摘要： In this article we present a method for ultrahigh-frequency (UHF)-radio frequency identification (RFID) tag localization via phase measurements gathered during a circular trajectory of the reader antenna, that is, ORBITER. The localization is pursued by exploiting both the minimum and the variability of the unwrapped phase curve via appropriate mathematical operators. We investigate the sensitivity of the method, by highlighting the conditions for its applicability and the proper choice of the measurement parameters. For the experimental validation, we use a 3-D Cartesian portal for antenna motion along circular trajectories, that allows us to assess the performance and reliability of the method in a controlled environment. Results show that the proposed method achieves good accuracy and robustness in localizing UHF-RFID passive tags. The method finds applications in both indoor and outdoor scenarios.

关键词： Fall detection   Doppler shift   Radiofrequency identification   Older adults   Receivers   Sensors   Passive RFID tags   RFID   passive tag   fall detection  

摘要： As the global population ages, the prevalence of elderly individuals living independently has risen. As one of the main threats to the health of the elderly, falling seriously reduces the happiness of the elderly and imposes a burden on the medical system. Therefore, the exploration of automatic fall detection systems is crucial. However, proposed fall detection systems exhibit varying degrees of shortcomings. In this paper, we propose a new fall detection method utilizing Doppler shift with RFID passive tags. The motion of the passive tag induces a Doppler shift in the reflected signal. This method is the first to use Doppler frequency shift for fall detection in RFID. Additionally, a velocity-position iteration algorithm is applied to ascertain the tag's position and velocity over time. The combination of velocity and position for fall detection yields higher accuracy compared to individual parameters. The proposed method demonstrates the capability to differentiate between sudden and soft falls, aiding medical professionals in identifying the cause of a user's fall. The experimental results demonstrate that the system achieves an accuracy rate of 91.7% in detecting sudden falls, and this accuracy remains at 86.8% even after incorporating soft falls into the analysis. Consequently, the proposed method proves to be an effective and reliable approach for fall detection.

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

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. © 2024 The Authors

关键词： PLC控制   RFID识别   羊舍门控   自动化管理  

摘要： 智能化养殖管理系统对提高羊舍管理效率、保障羊只安全和降低人工成本效果显著,在养殖场日益被使用。为便于照顾重点羊只,养殖场往往将其关入单独子圈内。但人工日常驱赶独立子圈内的重点出入羊只时,往往会引起羊只的应激反应,其原因在于人工开关总圈和子圈门会惊吓到羊只。为此,本文采用PLC与RFID识别模块结合,设计一种能自动识别羊的身份,并控制总圈分栏门和子圈单间门自动开闭的控制系统,实现羊只自行精准归栏目的,提升羊舍管理的智能化水平。主要研究内容如下: (1)羊舍总圈分栏门和子圈单间门的机电结构设计 通过对传统养殖管理模式的分析,明确了智能羊舍门控系统的机械设计需求,使用三维制图软件(Solidworks)绘制出机构的前分门,子圈电动门和羊舍通道。对其中前分门所涉及的气缸,电磁阀,节流阀和红外传感器等元器件进行选型及羊舍单间电动门中的电机和驱动器进行选型。并对前分门机构在羊只撞击下的情况进行有限元分析。 (2)控制系统硬件设计与模块配置 在硬件设计方面,系统由PLC控制器、RFID识别模块、门控装置、传感器模块和触摸屏操作界面等组成。首先,基于西门子S7-200 SMART PLC作为核心控制单元,通过PLC与RFID模块的结合,系统能够实时接收和处理羊只身份信息,自动控制门的开关。其次,气缸和电机控制前分栏门和单间门的开关,系统通过触摸屏提供实时监控与操作界面,提升了用户体验。 (3)控制系统程序设计 控制系统通过PLC编程实现羊只识别与门控操作。RFID模块在羊只接近时实时读取羊只耳标信息,并将数据传输至PLC,PLC根据读取的羊只身份信息判断目标子圈门,依次控制前分栏门和子圈门的开启与关闭。 (4)整机样机试制与验证 开发了智能羊舍门控系统的原型机,并对其进行了功能验证和性能测试。通过与传统手工管理方式的对比,验证了智能羊舍门控系统在提高管理效率、降低人工成本、保障羊只安全等方面的优势。测试表明,平均响应时间为1.5秒,满足了设计要求的2秒以内的响应时间。然而,在高峰使用时段,当多只羊同时进入识别区域时,响应时间有轻微的增加,最长达到2.2秒。系统在羊只识别精度、门控反应时间等方面均优于传统方式,满足现代养殖管理的需求。

关键词： 无芯片   RFID   手势识别   谐振结构   天线  

摘要： 手势识别是一种利用简单手势实现人机交互的技术,在虚拟现实、医疗诊断等场景中应用广泛。近年来无芯片RFID手势识别传感器以其低成本、可穿戴性以及能对目标物体进行实时监测等优势得到了人们的普遍关注。因此设计一种能独立监测手指状态的传感器,具有重要的应用价值。 本论文研究了一种对手指不同关节弯曲情况进行独立监测的传感器,对其工作原理和设计方法进行了介绍。通过对其编码单元(谐振结构)及通信单元(收发天线)的有效设计实现了手势识别。主要工作内容如下: (1)仿真了一款用于识别三指六关节的分截模型谐振结构,其由一根主传输线和三个分别位于不同手指上的分截的短截线谐振单元构成,分截间隙设计在手指一二关节连接处。谐振结构尺寸为73×71.8×1.2mm3,工作频段为3-6GHZ,六个谐振频率与手指关节弯曲情况相关,通过判断谐振频点的出现与否实现对手指关节共27个状态的识别。 (2)设计了一款用于识别两指四关节的组合模型谐振结构,该谐振结构由一根主传输线和位于两根手指的四个短截线谐振单元构成,介质板为棉布,导电材料为铜箔。谐振结构整体尺寸为74.5×65×1.2mm3,工作频段为3-4GHz,四个短截线的谐振点分别为3.11GHz、3.355GHz、3.619GHz和3.965GHz。通过控制每根手指上两根短截线的长度以及与主传输线的间隙,完成对每根手指两关节四个状态的识别,并通过实验验证了其状态组合。 (3)设计了一对用于实测验证的共面波导超宽带缝隙天线。天线介质层为棉布,导电材料为铜箔,整体尺寸为82×80×1.1mm3,工作频段覆盖3-4GHz,具有全向辐射特性,最大增益可以达到6dBi左右,符合设计需求。 (4)设计了一对匹配谐振结构的微带超宽带单极子天线。天线为六边形贴片,介质层为棉布,导电材料为铜箔,整体尺寸为55×46×1.2mm3,工作频段覆盖3-4GHz,具有全向辐射特性,最大增益可以达到3dBi左右,达到设计预期。

关键词： 预制梁场   信息化管理   智慧工厂   射频识别  

摘要： 随着装配式桥梁的广泛应用,预制梁板作为关键组成部分,其需求呈现显著增长态势。鉴于预制拼装技术在提高工程质量、缩短建设周期及减轻环境影响等方面的显著优势,以及传统人工管理模式在应对高效生产和精细化管理挑战中的不足,本研究提出了预制梁场信息化管理系统的设计与实现。 本研究基于精益建造和信息化管理理论展开,融合了物联网与无线射频识别技术,旨在推动预制梁场管理的数字化转型与升级。基于对预制梁场核心业务需求和存在问题的分析,本研究设计了包含12个功能模块的预制梁场信息化管理系统架构。通过设定明确的系统目标、构建稳健的核心架构,择优选择系统开发模式,本研究成功地将理论设计转化为实际功能。此外,通过整合多种智能化设备,系统实现了预制梁生产线的智能化与信息化集成。 本研究开发的预制梁场信息化管理系统具有多维度、高效协同的特点,集成了现场监控、PC端、移动端APP及预制梁生产线的智能设备,形成了一个高效协同的设备终端网络。该系统不仅实现了预制梁制造过程的可视化、透明化、智能化管理,还显著提升了生产效率,降低了人工成本,为预制梁场提供了全方位、高效能的信息化解决方案。 综上所述,本研究设计的预制梁场信息化管理系统不仅满足了当前预制梁场管理的迫切需求,也为装配式桥梁建设工程领域提供了一种可借鉴的信息化管理模式,具有广泛的应用前景和深远的社会意义。

关键词： Internet of things  

摘要： An autonomous parking system is the essential innovation for stress free car parking in smart cities. The efficient use of resources is a key goal of smart cities, and their integration with technology has improved productivity and dependability for urban infrastructure. In this paper, an efficient automated parking system integrating Internet of Things (IoT) and radio frequency identification (RFID) technologies is proposed. The proposed system is integrated with IoT in which the consumers can book the parking spots before arriving to the destination—drastically reducing the time taken by the consumers in searching for the parking slot. The proposed system effectively saves time for the consumers and also significantly provides solutions for all the parking-related issues faced by the management of flats, theaters, malls, hospitals, etc. In management perspective, this system will provide better use of their resources and reduce the amount of labor needed to maintain these parking lots. The automated parking system overcomes the important issue of jamming near the gates of parking spots by improving the check-in and check-out process of vehicles. The RFID tags given to the drivers reduce the time for vehicle identification as it is done automatically. The proposed system avoids long queues at the gates, unnecessary traffic jams near the gates, reduces the waiting time, and ensures security by allowing only the registered users identified through RFID tags. Thus, the proposed system will be a sophisticated system for the consumers, drivers, and a boon to mall owners and management. © 2024 by Begell House, Inc.

关键词： 物流   管理信息系统   射频识别   企业物流管理   数据分析  

摘要： 近年来,随着物流行业的迅速发展,企业对物流信息管理系统的需求也越来越高。RFID技术作为一种先进的物流管理工具,被广泛应用于企业的物流管理过程中。X企业自2016年开始推进物流管理信息系统的开发和应用,基本满足各个货站的货物处理流程的单货信息管理,但是由于X企业的市场扩张和企业发展较快,现有的物流管理信息系统不能降低人工录入的差错率和货物在运输过程中的全程跟踪记录,在发生或人为差错造成的丢失和错运的紧急情况时无法紧急处理和确定责任人。为彻底改变目前物流运输中存在的管理问题,X企业与SW公司合作成立信息科技部进行基于RFID技术的物流信息管理系统的开发与应用。该系统要求可以在外网条件下使用,做到应用功能完善、数据资源共享、用户使用方便、维护成本降低等。以提升企业物流信息管理效率。通过对RFID技术在企业物流管理中的应用进行探讨,并结合优化企业物流信息管理系统的研究,提出了一系列提升企业物流信息管理效率的措施。同时,本文还将重点探讨RFID技术在企业物流信息管理中的作用。通过本研究的结论,将为X企业物流信息管理系统的优化提供一定的参考和借鉴。 本文以X公司的物流管理现状为切入点,深入剖析了其库存管理、配送及发货流程,实现了这些环节的实时、精准和可视化分析。特别关注了运输管理和配送管理的挑战。文中详细论述了如何选择适宜的电子标签读写设备,并提出了控制系统与管理体系的一般构想。随后,以RFID技术为关键,我们设计并实施了一套创新的企业物流管理系统,该系统重塑了企业的运营流程,有效地应对了当前面临的难题。 综上所述,基于RFID技术的企业物流信息管理系统在优化企业物流信息管理方面具有重要的意义。它能够提高物流信息的透明度和准确性,实现物流过程的实时监控和问题的及时处理,同时还能够实现物流流程的自动化和智能化,提高物流运作的效率和质量。因此,进一步研究和优化基于RFID技术的企业物流信息管理系统具有重要的实践价值和应用前景。