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摘要： One of the critical steps in the post-production of paddy rice is to be stored in conditions that need to be controlled, especially the moisture content (MC) of the grains. The ability to determine and control moisture is a very important aspect of maintaining grain quality. This study aims to detect the MC of rice grain using UHF RFID technology. In this paper, three experiments have been carried out to detect the MC of rice in full rice grain-filled containers involving two conditions: with metal and without metal containers. The samples used consist of four 2 kg bags with MC levels of 11.875%, 16%, 20%, and 24%. The Received Signal Strength Indicator (RSSI) values were measured using a UHF handheld reader with two RFID tags to predict the MC. The results show an increasing RSSI pattern as the MC increases.

关键词： RFID技术   高校图书馆   方式方法  

摘要： 高校图书馆管理是高校多元化、智能化、现代化发展的重要组成部分。在高校图书馆管理工作中,引入RFID技术,不仅有助于当代高校图书馆管理智能生态化构建,推动高校图书馆的科学发展,更重要的是还能提升图书馆管理效益,增强图书馆的管理综合水平。本文就 RFID技术在高校图书馆管理中的价值与意义进行了阐述,希望能够促进当代高校建设的科学化发展。

标准号: WB/T 1121-2022

摘要： 本文件规定了射频识别技术在仓储管理中应用的总体要求、系统架构、系统功能、射频识别设备要求、射频识别设备安装要求、射频标签数据存储与信息标识、仓储作业应用要求。本文件适用于射频识别技术在仓储管理中的应用。

关键词： Sensors   Textiles   Radiofrequency identification   Impedance   Antenna measurements   Yarn   Integrated circuit modeling   Antenna sensor   electro-textile   bending angles   conductive yarn   compression sensor   equivalent circuit   interface   received signal strength indicator (RSSI)   respiration   Ultra High Frequency (UHF)   RFID  

摘要： Electro-textile Ultra High Frequency (UHF, 865-868 MHz) Radio Frequency Identification (RFID) devices have great potential to be explored as sensors due to the features of fabric materials. In this work, an electro-textile UHF-RFID compression sensor base on T-match structure with a corresponding interface are developed and evaluated for two application scenarios. For accurate textile UHF-RFID antenna design and maximize the read range, the impedance of the electro-textile based on snap buttons is modelled and characterized an a measured read range of 5.22m is experimentally obtained. If the distance of the RFID reader and RFID sensor remain constant at 1 m. The experimental results show that RSSI range change from -42 dBm to -58 dBm as a quadratic function in terms of the knee angle bending and from -45 dBm to -40 dBm during expiration and inspiration phase when the sensor is located on the chest, which validated the usefulness of the proposed sensor.

关键词： Interdigitated capacitor   passive LC tag   lactate sensor   dielectric constant   solvatochromism   oscillator  

摘要： A passive radio frequency-identification-based inductor-capacitor (LC) lactate sensory system with a specific dye-containing interdigitated capacitor (IDC) in which the sensing signal is amplified by the solvatochromic effect is proposed. When a lactate solution contacts the IDC of the LC lactate sensor, the capacitance of the IDC changes, changing the resonance frequency of the sensor. This changes the oscillation frequency of the Colpitts oscillator in the readout circuit. By analyzing the frequency changes, the concentration of the lactate solution can be measured quickly and accurately over a wide range. To our knowledge, the proposed device is the first passive, battery-free LC lactate sensor that uses solvatochromic dye-containing IDC sensing elements to detect lactate solution concentrations. Four solvatochromic dyes were tested and incorporated into a polymer as the lactate-sensitive membranes of the IDCs. The proposed LC sensor tag offers excellent sensitivity and linearity over a wide lactate concentration range of about 10 mu M to 1 M. The response and recovery times of our LC sensory system were significantly shorter than those of previously reported lactate sensors. Our results are useful for the development of reliable wearable devices capable of real-time lactate detection at a low cost.

关键词： RFID technology   Food industry   Entrepreneurial orientation   Green supply chain   Closed-loop supply chain   Mathematical model  

摘要： Purpose - Environmental awareness is increasing among people in developing countries. In this regard, companies should consider ecological goals in addition to financial goals. Since the food industry is recognised as one of the largest emitters of CO2, profit and ecological objectives are optimised in radio-frequency identification (RFID) based closed-loop supply chain in the food industry in this paper. Design/methodology/approach - Based on the literature, companies with a green entrepreneurial orientation (GEO) can turn ecological problems into opportunities using their proactiveness. In this regard, a new mixed-integer non-linear mathematical model is presented for optimising a new multi-product RFID-based closed-loop supply chain with a GEO in the food industry. The case study in this paper is Ofogh-e Kourosh company which is located in Iran. The GAMS software is used to code this model. Findings - The optimum number of new products and materials flow was found among the closed-loop supply chain entities. Some factors as price, quality and warranty of products were considered, and the number of reopening of facilities if needed was set. The optimum node for RFID installation was found. Originality/value - The paper presents a multi-objective mathematical model for optimising a multi-product RFID-based closed-loop supply chain with a GEO in the food industry. In addition, this paper gives insights into how can model this type of supply chain considering ecological and financial attributes.

关键词： Radio frequency identification (RFID)  

摘要： Recently, person identification has been a prerequisite in many applications of the Internet of Things. As a new biometric identification technology, gait recognition has a wide application prospect with the advantages of long-distance recognition and difficulty to forge. However, the existing gait recognition methods have some problems, such as complex algorithm calculation, high user participation, and large equipment overhead. In this paper, we propose RF-Gait, a method that identifies a person through unobtrusive gait perception with COTS RFID. The key insight is that wireless signal fluctuation can be exploited to distinguish each person's unique gait behavior. To this end, we first collect and preprocess the gait-induced data composed of multiple RFID tags. Furthermore, multivariate variational mode decomposition is utilized to extract the intrinsic features in the spatial multichannels cooperatively. By developing a support vector machine model, we identify a person via the intrinsic walking pattern. Finally, extensive experiments show that our method can identify a person with an average accuracy of 96.3% from a group of twenty persons in a complex indoor environment.

关键词： Decision trees  

摘要： The utility of chipless RFID technology for the identification of 8 materials (7 plastic types and glass) in the recycling chain is examined. We first demonstrate how the frequency response of 8 Circular Ring Resonators (CRR), designed to operate in the 1.5 - 6 GHz band, are used to encode 8 unique material IDs. Tagged items are then inserted one a time in front of a chipless RFID reader and speed and accuracy of material identification is determined. We demonstrate the ability to correctly identify material type with over 90% accuracy while being 3-16X faster than other methods reported in the literature. Techniques to further improve detection speed at the cost of accuracy are then presented. Finally, future directions of exploration are also discussed. © 2022, CC BY-NC-SA.

关键词： RFID   NFC   二维码   宠物犬管理   动物芯片  

摘要： 为了加强犬只识别定位管理,南宁市开展了内置注射芯片、外置犬牌等管理措施,同时开展了基于管理制度的技术支撑研究,如RFID动物芯片低频读卡器、NFC犬牌识读应用、二维码识别小程序等,关联犬只管理数据库,研究构建“互联网+物联网+宠物犬只管理”一体化的警务管理体系,为群众提供了宠物犬跟踪识别管理等应用服务,为警方延伸犬只识别检查提供了更便捷的移动管理途径。

关键词： STM32   RFID   质量优化   回归算法   ZigBee   局域网协议  

摘要： 针对现有果园人力成本高、果实质量难以保障、节水困难、智能化程度低的问题,设计了一套低成本、低功耗、监测果园环境、优化果实品质的现代化智能滴灌系统。首先基于ZigBee无线通信技术,将传感器采集的果园土壤温湿度、光照、大气温湿度等数据组网传入数据库;再基于RFID射频技术,跟踪果实检测流程,将检测仪器获取的果实品质信息存入数据库并与原有信息匹配。上位机监控园区状态,管理滴灌方式,调用回归算法对上述数据进行分析,生成对滴灌量、水肥比例等指标的分析报告。该设计优化了灌溉模式,为提高果实的产量、糖分、外观品质提供了合理建议。