教学课程资源库 更多>>

关键词： Chipless RFID   RCS   convolutional encoding   viterbi decoding   FDSS  

摘要： In the present study, a passive 'arch shape' spiral resonator-based chipless Radio Frequency Identification (RFID) tag is proposed having 8-bit of data capacity. The 8-bit tag is based on the frequency domain spectral signature method and its backscattered radar cross section (RCS) is analysed with the help of the bi-static method of measurement. The operating range of the tag varies from 2 to 6 GHz, achieving the industrial scientific and medical (ISM) band and ultra-wide band of frequencies. The 8-bit data generated from the tag should be transmitted with proper encryption and decryption along with an adequate error correction method. In this regard, a novel approach is proposed, in which the backscattered RCS is processed to achieve the bits in a coded form with the reduction of bit error. Here, the convolutional coding techniques have been adopted to process and encode the backscattered signal. This encoding method is frequency-domain coding, based on the sequence of the RCS of the proposed tag. The proposed encoding technique is based on the trellis diagram, in which some combination of the sequence is shuffled to produce a new sequence. To decode the encoded signal, the Viterbi algorithm is proposed. The bit transformation is validated by calculating the bit-error graph and using a comparison table.

关键词： Authentication   chipless RFID tags   data fore-cast   data fore-cast   encoding scheme   high encoding capacity   high encoding capacity   robustness   robustness   machine learning   machine learning   machine learning  

摘要： This article presents a robust, high-capacity chipless encoding solution based on mapping resonance frequencies to Euclidean space. We introduce, for the first time, a methodology that exploits a usually undesired phenomenon, i.e., mutual coupling, as a method to improve the encoding capacity of chipless RFID tags. A deep analysis of the proposed method's capability to mitigate fabrication tolerance and measurement uncertainties is performed. To address the computational challenges of the decoding phase, we employ machine learning to predict resonant frequencies of noncalibrated tags. With a tolerance of 50 MHz, a forecast accuracy of 97.6% within a 25 MHz error margin, and 100% within a 40 MHz error margin is achieved. A reliable space encoding efficiency of 22.5 bits/cm(2 )and spectrum encoding efficiency of 2.1 bits/GHz are achieved. As a proof of concept, we designed tags using periodically arranged, middle-notched planar dipole resonators, chosen for their fabrication-tolerant characteristics, enhanced radar cross section (RCS) level and back-shielding properties.

关键词： RFID   电力物联网   认证   国密算法   BAN逻辑  

摘要： 随着电力物联网技术的快速发展， 建设能源互联网具有重大意义。电力物联终端设备的识别认证是保障能源互联网安全稳定运行的基础。为实现海量电力终端设备信息高效采集与安全认证，本文提出一种面向电力物联网的RFID认证方案，该方案利用RFID技术，基于国密SM3和SM4算法设计，既实现了阅读器与电力设备之间的相互认证，也保障了电力通信数据的传输安全，降低了设备标签的计算复杂度。安全性分析表明，该方案满足不可追踪性、抗重放攻击、抗去同步攻击、抗拒绝服务攻击等安全特性，BAN逻辑分析进一步表明该方案满足相互认证性。性能分析表明，该方案在标签计算量、存储量、通信量及数据库搜索效率方面具有较好的性能优势。

关键词： Cost reduction  

摘要： This paper presents EDURFID, an automated school attendance control system based on RFID technology designed for rural educational institutions in Peru. The system integrates open-source hardware (Raspberry Pi 5, Arduino UNO R3) with RC522 RFID modules operating at 13.56 MHz, implementing a web architecture developed in Python Django. The system demonstrates 100 % precision in RFID readings with 0.03-second response time, achieving 94 % cost reduction compared to commercial solutions. Validation at Túpac Amaru Secondary Educational Institution showed successful automation of attendance processes, saving 50 daily minutes of administrative time while providing real-time reporting capabilities. © 2025, CC BY.

关键词： Wireless communication   Antenna measurements   Shape   Libraries   Multimedia communication   Antennas   Radiofrequency identification  

摘要： RFID system is one of the key technology to bring efficiency to library services such as the automatic rental of book and return. In this paper, we evaluate the performance of table type RFID reader. Furthermore, when RFID reader is on the metallic plate (which affected the performance of RFID), we investigate the relation between the reading rate and the distance between metallic plate and RFID reader. From the experiments, it is clearly shown that communication area decreases and becomes near the center of reader's antenna as the distance between the tag and the reader increases. The influence of the metallic plate to the reader depends on the gap between the metallic plate and the reader.

关键词： RFID   Blockchain technology   B2B Steel industry circular supply chain management  

摘要： Circular supply chain management is expected to shift the steel sector from a conventional economic paradigm to a more fruitful circular economy. Furthermore, tracing reusable and recyclable metals across the steel industry's supply chain necessitates multi-stakeholders' involvement. Radio frequency identification (RFID) may assist in the governance of the complexity of circular steel supply chain management (CSSCM), strengthening the steel industry's transparency as well as efficiency. The following research develops a decentralized and service-oriented RFID-enabled blockchain-integrated conceptual framework that incorporates a circular steel supply chain strategy for the B2B steel sector to achieve this goal. Industrial methods, inventory management, and resource utilization are examined in this study. The findings show that RFID-enabled blockchain technology enhanced firm's capacity to share real-time knowledge with CSSCM stake-holders and aid organizations in the B2B steel sector in understanding the aspects that influence the steel sector's overall performance. Management must need to understand the value of associated technologies to deliver CSSCM and make choices faster. The implications of adopting RFID-enabled blockchain technology to serve the circular economy are discussed from theoretical, practical, and social perspectives.

关键词： Training   Reviews   Prototypes   User interfaces   Probability   Software   Assisted living   Reliability   Usability   Radiofrequency identification  

摘要： Technology assisted living is a practical solution to the increasing demands for access to healthcare services in an era of aging populations and dwindling supply of professional healthcare workers. Radio Frequency Identification (RFID) technology with complementary sensors is widely considered as a very promising approach to realizing the vision of technology assisted living. At the core of any assisted living systems is the important function of human activity inference, which is what enables such systems to be intelligently perceptive and responsive to the humans under their care. In this paper, we review the current state-of-the-art in activity inference for RFID-based assisted living applications, and present our ongoing work on an assisted living prototype for ‘goal training’ or brain rehabilitation of patients with cognitive impairment in their home environments, with a discussion on the potential design issues involved.

关键词： RFID 无源技术   高压开关柜   温度监测   电力设备   智能化监测  

摘要： 高压开关柜作为电力系统核心设备,其运转温度对电力系统稳定性与安全性影响重大。本文借由RFID无源技术,展开高压开关柜温度监测设计探究。通过剖析RFID无源技术原理以及在温度监测范畴的应用长处,阐述监测系统硬件架构与软件设计详情。硬件上,打造温度采集模块、RFID标签及读写器;软件里,搭建数据处理和传输算法。该监测系统能够实时、精确监测高压开关柜温度,及时察觉潜在故障风险,为电力系统安全平稳运行给予技术保障,助力电力设备智能化监测发展。

关键词： 物联网   射频识别   智能停车场   数据库系统  

摘要： 在物联网的支持下,智慧停车系统正在逐渐改变传统的停车场运作方式,提高停车场的利用率。本研究采用物联网的射频识别技术、计算机局域网络技术、语音提示技术、短程微波通信技术、图像数字处理技术以及自动化控制等技术,实时采集数据并进行管理,精确地显现车位闲置情况,迅速查找车位。同时,该系统还可以有效地减少人为的介入,从而提高停车效率,节约运行费用。此外,本研究从停车效率、运营效率以及停车场成本等方面深入分析基于物联网的智能停车解决方案对停车场利用率的影响。通过智慧停车场的推行,旨在提高停车场的收益,缓解城市的交通拥挤,提高城市的运行效率。