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关键词： RFID技术   生鲜猪肉仓储   仓储管理  

摘要： 传统生产过程中,对物品的监测通常需以人工方式完成。这存在物品吞吐量过大的问题,会造成某些意外状况。用射频识别(RFID)方法为物联网和生鲜猪肉仓储建立感知系统,利用云端服务与各类智能终端对数据信息进行高效传输。为所有堆垛机上设置了RFID标签,通过多点定位的方法测试堆垛机方位。进行生鲜猪肉存储时,通过系统记忆和标识功能记录存储位置信息并实施可视化监管。本文就此进行了探究。

关键词： Metamaterials  

摘要： A high temperature sensor based on a metamaterial is proposed as a chipless radio frequency identification sensor tag that can measure temperature wirelessly. The metamaterial, based on a double circular split ring resonator (SRR), is highly frequency selective and has negative permittivity. The double circular SRR is fabricated on the alumina ceramic substrate, which acted as the temperature sensing material. The permittivity of the material varies with the temperature parameter, resulting in a shift of backscattered resonant frequency of the sensor tag. Simulations verify the feasibility of this sensor tag in the microwave band under electromagnetic stimuli. When the temperature increases from 200 to 1000 ?, the resonant frequency monotone decreases from 6.64 to 6.26 GHz with an average sensitivity of 0.475 MHz/?. The sensor tag has features such as high temperature, being wireless, passive, of comparatively low-cost, and miniature, with diversified application potential, allowing it to compete with other sophisticated temperature devices in terms of performance.

关键词： Radiofrequency identification   Costs   Clothing   Internet of Things   Consumer electronics   Production   Business  

摘要： Fast fashion is a clothing sales model. With people's demand for rapid updates on clothing, the fast-fashion clothing industry has emerged and developed rapidly. It has been widely operated in developing and developed countries and has been widely recognized by consumers. In order to analyze the current situation of Chinese fast-fashion industry and the differences with foreign brands, this article applies radio frequency identification (RFID) technology to the entire process of fast-fashion apparel business management. In terms of experimental methods, this study uses a combination of qualitative and quantitative methods, questionnaire surveys, and comparative analysis, and introduces the relevant theories of the clothing industry. In the experimental design, the three aspects of operating cost, implementation cost, and profitability in enterprise management are designed. The analysis part selected several major fast-fashion brands, such as Zara, Uniqlo, GAP, and Hstyle, for comparative analysis, business management analysis, product update cycle analysis, driving factor analysis, and consumer choice analysis, and other parts of the complexity analysis. With the abovementioned analysis, it concludes that consumer recognition of Chinese fast-growing fashion products is only 62%, while recognition and stability of foreign brands has reached more than 70%. In terms of consumer choice, consumers in different countries should be targeted. In this article, we carry out data collection, use RFID technology, take targeted strategic measures, and strive to realize the reform of Chinese fast-fashion clothing industry. We also provide reference for fast-fashion brands to implement RFID technology.

关键词： RFID   NFC   无线射频取电技术   电子纸   智能锁  

摘要： 由于传统供电方式无法满足社会可持续发展需求,以及物联网应用灵活且低成本部署的需求,NFC无线射频取电技术成为一种有效的解决方案。介绍了NFC无线射频取电技术,分析其天线设计、输入功率和输出电压、能量转换效率、灵敏度及兼容性等技术指标,阐述其在NFC智能锁及电子纸显示的两种典型应用场景,对其在电子纸应用方面从技术和市场两方面做了展望,为业界在NFC无线射频取电技术及其应用领域的研究提供参考。

关键词： RFID tags   Mobile computing   Servers   Motion detection   Hardware   Logistics   Antenna measurements   Human-RFID interaction   reflector polarization model   RFID system  

摘要： UHF RFID technology has become increasingly popular in stores, since it can quickly read a large number of RFID tags from afar. The deployed RFID infrastructure, however, does not directly benefit smartphone users in stores, mainly because smartphones cannot read UHF RFID tags or fetch relevant information. This article aims to bridge the gap and allow users to 'read' UHF RFID tags using their smartphones, without any hardware modification to either deployed RFID systems or smartphone hardware. To 'read' an interested tag, a user makes a predefined smartphone gesture in front of an interested tag. The smartphone gesture causes changes in 1) RFID measurement data captured by RFID infrastructure, and 2) motion sensor data captured by the user's smartphone. By matching the two data, our system (named ShakeReader) can pair the interested tag with the corresponding smartphone, thereby enabling the smartphone to indirectly 'read' the interested tag. We build a novel reflector polarization model to analyze the impact of smartphone gesture to RFID backscattered signals. We enhance the basic version of ShakeReader [7] by improving its performance in densely deployed scenarios. Experimental results show that ShakeReader can accurately pair interested tags with their corresponding smartphones with an accuracy of >96.3%.

关键词： Monitoring   Estimation   RFID tags   Mobile computing   Frequency modulation   Spectrogram   Radio frequency   Respiration monitoring   RFID   dynamic environment   multipath effect  

摘要： Respiration monitoring (RM) is crucial for tracking various health problems. Recently, RFID has been widely employed for lightweight and low-cost RM. However, existing RFID-based RM systems are designed for static environments where no people move around the monitored person. While, in practice, most environments are dynamic with people moving nearby, which introduces dynamic multipath signals and significantly distorts the respiration signal, leading to inaccurate RM. In this paper, we aim to realize accurate RFID-based RM in dynamic environments. Our observations show that multipath signals can result in a similar pattern to respiration, which leads to misdetection of apnea and inaccurate respiration rate estimation. To address this issue, we first measure the respiration anomaly in the signal spectrogram to detect apnea. Second, we successfully remove the multipath effect for respiration rate estimation inspired by the intrinsic features of human respiration. Specifically, compared with people's moving pattern, respiration pattern is regular and periodic. By transforming a normal respiration cycle into a matched filter, real respiration cycles can be extracted from the noisy RFID signal, which can be applied to estimate the respiration rate via peak detection scheme. The experiments show that our system achieves the average error of 4.2% and 0:51 bpm for apnea detection and respiration rate estimation in dynamic environments, respectively.

关键词： 价值流分析   装配式建筑   BIM+RFID   预制构件   全过程管理  

摘要： 基于国内外研究现状,阐述了预制构件全过程管理的概念及各阶段任务。运用价值流分析法重构预制构件全过程管理的信息流,优化预制构件的价值流程。探讨BIM和RFID技术集成应用于预制构件全过程管理,提出预制构件全过程管理的改进建议,以期提高利益相关方构件管理的高效协同,促进装配式建筑高质量发展。

关键词： 装配式建筑   BIM技术   RFID技术   成本管控  

摘要： 为加快推进我国新型建筑工业化,推动城乡建设绿色高质量发展,我国正全力推动装配式建筑落地应用,但装配式建筑成本过高仍然是制约其发展的重要因素之一。通过对装配式建筑全过程成本分析,确定装配式建筑成本控制重难点,将BIM技术与RFID技术相结合从装配式建筑预制构件设计、生产、运输仓储、施工安装这四个阶段分别进行应用分析以实现成本管控。

关键词： 射频识别   二维码   电机端盖   FINS协议   HTTP协议  

摘要： 针对新能源汽车生产线对电机数量的需求越来越多,电机端盖尺寸的测量精度要求越来越高,为了提高操作人员对生产的电机端盖准确验证效率,利用物联网相关技术设计了一种电机端盖尺寸检测系统。采用光栅位移传感器实现电机端盖尺寸的高精度测量,运用二维码标识端盖,射频识别卡进行操作人员权限管理。工控机通过工业以太网与测量仪器和MES服务器连接,分别使用FINS协议和HTTP协议进行数据交互。检测系统已应用于某产线,试运行结果表明系统操作方便,运行稳定,可扩展性强,显著提高了生产效率。

关键词： Coprocessor   design   key-authentication   wireless sensor nodes   RFID   ECDH   FPGA  

摘要： We have proposed a flexible coprocessor key-authentication architecture for 80/112-bit security-related applications over GF(2m)field by employing Elliptic-curve Diffie Hellman(ECDH)*** flexibility,a serial input/output interface is used to load/produce secret,public,and shared keys ***,to reduce the hardware resources and to achieve a reasonable time for cryptographic computations,we have proposed a finite field digit-serial multiplier architecture using combined shift and accumulate ***,two finite-statemachine controllers are used to perform efficient control *** proposed coprocessor architecture over GF(2^(163))and GF(2^(233))is programmed using Verilog and then implemented on Xilinx Virtex-7 FPGA(field-programmable-gate-array)*** GF(2^(163))and GF(2^(233)),the proposed flexible coprocessor use 1351 and 1789 slices,the achieved clock frequency is 250 and 235MHz,time for one public key computation is 40.50 and 79.20μs and time for one shared key generation is 81.00 and 158.40μ***,the consumed power over GF(2^(163))and GF(2^(233))is 0.91 and 1.37mW,*** proposed coprocessor architecture outperforms state-of-the-art ECDH designs in terms of hardware resources.