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关键词： 仓库管理   RFID   系统设计  

摘要： 企业发展过程中生产规模不断扩大,仓储物资的种类也越来越多,各种物资频繁出库增加了仓库管理作业的复杂性,传统的仓库管理系统多采用人工采集数据的方式,不仅效率低下,而且错误率更高,已经远远无法满足实际的仓库管理需求。RFID作为一种非接触式的自动识别技术,其能够自动采集仓库作业各个环节的数据,不仅能够提高数据采集的准确性及效率,而且能够实现仓库物资的统一管理,合理控制库存,提高仓库管理的效果及效率。文章就针对RFID技术在仓库管理中的具体应用进行探讨。

关键词： Internet of things  

摘要： In large-scale Internet of Things (IoT) applications, tags are attached to items, and users use a radiofrequency identification (RFID) reader to quickly identify tags and obtain the corresponding item information. Since multiple tags share the same channel to communicate with the reader, when they respond simultaneously, tag collision will occur, and the reader cannot successfully obtain the information from the tag. To cope with the tag collision problem, ultrahigh frequency (UHF) RFID standard EPC G1 Gen2 specifies an anticollision protocol to identify a large number of RFID tags in an efficient way. The Q-algorithm has attracted much more attention as the efficiency of an EPC C1 Gen2-based RFID system can be significantly improved by only a slight adjustment to the algorithm. In this paper, we propose a novel Q-algorithm for RFID tag identification, namely, HTEQ, which optimizes the time efficiency of an EPC C1 Gen2-based RFID system to the utmost limit. Extensive simulations verify that our proposed HTEQ is exceptionally expeditious compared to other algorithms, which promises it to be competitive in large-scale IoT environments.

关键词： Classification (of information)  

摘要： Millions of RFID tags are pervasively used all around the globe to inexpensively identify a wide variety of everyday-use objects. One of the key issues of RFID is that tags cannot use energy-hungry cryptography, and thus can be easily cloned. For this reason, radio fingerprinting (RFP) is a compelling approach that leverages the unique imperfections in the tag's wireless circuitry to achieve large-scale RFID clone detection. Recent work, however, has unveiled that time-varying channel conditions can significantly decrease the accuracy of the RFP process. Prior art in RFID identification does not consider this critical aspect, and instead focuses on custom-tailored feature extraction techniques and data collection with static channel conditions. For this reason, we propose the first large-scale investigation into RFP of RFID tags with dynamic channel conditions. Specifically, we perform a massive data collection campaign on a testbed composed by 200 off-the-shelf identical RFID tags and a software-defined radio (SDR) tag reader. We collect data with different tag-reader distances in an over-the-air configuration. To emulate implanted RFID tags, we also collect data with two different kinds of porcine meat inserted between the tag and the reader. We use this rich dataset to train and test several convolutional neural network (CNN)-based classifiers in a variety of channel conditions. Our investigation reveals that training and testing on different channel conditions drastically degrades the classifier's accuracy. For this reason, we propose a novel training framework based on federated machine learning (FML) and data augmentation (DAG) to boost the accuracy. Extensive experimental results indicate that (i) our FML approach improves accuracy by up to 48%;(ii) our DAG approach improves the FML performance by up to 19% and the single-dataset performance by 31%. To the best of our knowledge, this is the first paper experimentally demonstrating the efficacy of FML and DAG

关键词： Radio frequency identification (RFID)  

摘要： This paper presents a block-chain enabled inkjet-printed ultrahigh frequency radiofrequency identification (UHF RFID) system for the supply chain management, traceability and authentication of hard to tag bottled consumer products containing fluids such as water, oil, juice, and wine. In this context, we propose a novel low-cost, compact inkjet-printed UHF RFID tag antenna design for liquid bottles, with 2.5 m read range improvement over existing designs along with robust performance on different liquid bottle products. The tag antenna is based on a nested slot-based configuration that achieves good impedance matching around high permittivity surfaces. The tag was designed and optimized using the characteristic mode analysis. Moreover, the proposed RFID tag was commercially tested for tagging and billing of liquid bottle products in a conveyer belt and smart refrigerator for automatic billing applications. With the help of block-chain based product tracking and a mobile application, we demonstrate a real-time, secure and smart supply chain process in which items can be monitored using the proposed RFID technology. We believe the standalone system presented in this paper can be deployed to create smart contracts that benefit both the suppliers and consumers through the development of trust. Furthermore, the proposed system will paves the way towards authentic and contact-less delivery of food, drinks and medicine in recent Corona virus pandemic. © 2021, CC BY.

关键词： Anti-collision   Performance   Reader-to-reader collisions   RFID   Simulated annealing   Tag-to-tag collisions  

摘要： Radio Frequency IDentification (RFID) is one of the prominent wireless technologies for implementing a complete smart environment and is preferred over magnetic tapes, bar codes and smart cards due to its low cost and high speed. RFID networks provide identification, location tracking and record management and consist of tags, readers and backend storage devices. In these networks, it is very common to see tag-to-tag or reader-to-reader collisions. For avoiding these collisions and hence to improve the overall system performance many probabilistic and deterministic anti-collision protocols have been proposed, but the majority of these protocols were found to be inefficient in channel distribution. In this work, based on simulation annealing, a novel and efficient reader-to-reader and tag-to-tag anti-collision protocol is proposed by uniformly distributing the available channels among different readers, which reduces reader-to-reader collisions to zero. For a better performance tag state parameters have been preferred over fixed scheduling. Improvement of tag identification ratio from 1% to 12.5%, successful interrogation cycles by up to 25% for a maximum of 1000 readers and reduction in the number of cycles required for interrogation by a minimum of 13.3% and a maximum of 25.5% and reader-to-reader collisions up to 24% for 100 K tags make the proposed protocol much suited to a heavily loaded network. Compared to other contemporary protocols performance gain in the range of 2% to 30% has been observed for the total number of sent/received packets, delay, number of collisions, idle cycles and time cycles.

关键词： RFID   智慧养老   物联网   定位  

摘要： 针对老龄化浪潮下养老面临的老人走失、意外等场景下的位置定位需求,本设计基于有源RFID技术,采用B/S架构设计一种智慧养老定位系统.系统基于有源RFID非接触式自动识别技术,实现对事先设走的阅读器区域范围内人员的精确定位,而且拥有人员管理、设备管理等功能。

关键词： 冷链物流   温度监控系统   RFID技术   温度标签  

摘要： 近年来,我国经济发展迅速,人们生活水平有了很大提高,人们对低温药品、食品需求量剧增。但是传统的温度检测仪存在着体积庞大、成本过高、依靠人力记录数据等问题。针对该问题,本文设计了一种基于RFID的温度监控系统,结构简单,重量轻、体积小、功耗低,对实际温度进行有效监控。

关键词： 物联网   实物档案   RFID技术  

摘要： 作为世界信息技术发展的新进展,物联网技术的运用能为档案管理开辟新的广阔空间。本文以华南理工大学实物档案管理为例,从多个方面设想物联网技术运用于实物档案管理所带来的全新变化,明确物联网技术给档案馆所带来的应用前景,也为智慧档案馆建设与发展提供参考。

关键词： RFID技术   自动充电   谐振变换器   信息交互   车载设备   无人值守   地面设备   补偿型  

摘要： 本文基于双侧LCC补偿型谐振变换器电路拓扑结构,对无线充电系统技术原理进行分析说明,结合无线充电系统实际应用场景,通过RFID技术进行车辆身份识别,同时利用Wifi技术进行地面设备和车载设备的充电信息交互,实现了一种电动汽车无人值守自动充电系统。