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关键词： Couplings   Capacitance   Wastewater   Sensors   Permittivity   Monitoring   Dielectrics   Cole-Cole model   LM algorithm   mixed rules   radio frequency identification (RFID)   tag coupling  

摘要： As a crucial part in sewage, high-salt wastewater contains abundant corrosive components and heavy metal elements, which makes it difficult for invasive monitoring. Therefore, based on coupling radio frequency identification (RFID) tags, this article proposes a noninvasive monitoring method for concentration of inorganic salt in sewage. In this method, the Cole-Cole model and slit cylindrical capacitance (SCC) model are combined to explore the relationship between capacitance of RFID and concentration of inorganic salt in sewage pipeline. A new efficient Levenberg-Marquardt (NELM) algorithm is used for regression between relative permittivity and concentration of inorganic salt categorically. Then, measurement data are processed under modified relative permittivity mixing rule of electrolyte and solvent. Finally, the concentration of each component in the multicomponent inorganic salt wastewater is obtained. Experimental results show that the maximal relative error (MRE) and average relative error (ARE) of single inorganic salt solution are 1.1% and 0.5%, while mixed solution are 2.6% and 1.89%. Such results indicate significant improvement compared with previous works. Great potential of RFID in working sewage monitoring is sufficiently confirmed.

摘要： Nowadays, a self-testing service system has emerged and is slowly becoming famous all over the globe. The main goal of a self-paid service system is to reduce staff costs while speeding up customer satisfaction. However, according to several studies, a self-help program promotes theft, resulting in significant business losses. As a result, the purpose of this study is to apply radio frequency identification technology (RFID) to self-testing systems to address the growing problem of theft caused by the introduction of self-testing services in supermarkets. It was determined that this study used a systematic sample and sent a survey to every second customer who left the supermarket until the results of the 100-customer survey were collected. Applying the latest RFID technology to a payment system can help a large store avoid further losses. RFID tags and RFID readers are used to use this RFID technology, which is similar to standard bar code functions but is much safer to reduce theft. In addition, this article investigates how RFID is used to help reduce payment waiting times, as it can scan the entire inventory in just a few seconds, making it ideal for loading, unloading, and simplifying the process.

关键词： 射频识别   反向散射网络   速率自适应   信号频移  

摘要： 近年来对于反向散射网络的关注度日益提升。在反向散射网络中反向散射节点如射频识别(RFID)标签等可吸收环境中的电磁波作为能量进行通信，并且可以在环境内大规模部署，使得其可在复杂环境中进行通信。然而，由于多径效应和信道衰落的存在，信息传输速率的选择不当会导致系统吞吐量下降。因此，根据环境及标签自身变化进行速率自适应是提升系统吞吐量的必要手段。但近年来速率自适应研究过程中存在触发器时效性不高和速率选择方案普适性较差等问题。针对以上问题本文提出了基于频移的速率自适应方法RAFS。RAFS中首先基于频移波动性设计了触发器。并在商用阅读器上实现了该触发器。在此基础上设计了基于两个数据包时间差的速率切换方案。根据实验结果，本算法在标签静止、运动的情况下系统吞吐量均有不同程度的提升，动态环境下更为明显。总体来说，系统总体吞吐量相较于只使用FM0编码提高了约15%。

摘要： Conventional warehouse management systems, which are based on 2D barcodes, require each unit of goods to be checked. Recording all the items’ information is a time-consuming process; yet some of the agricultural products stored in AgroHUB Banten have a short lifespan and need to be recorded quickly before they are distributed to another area. Therefore, storing the goods for a long time could cause them to spoil. This paper proposes an RFID-based warehouse management system to reduce the time needed to record goods, especially perishable agricultural products. The design of the system includes inbound, outbound, and process management in the warehouse. The system is expected to enhance the working efficiency of the warehouse, reducing operating costs and improving customer satisfaction.

关键词： 射频识别   信息交换   坐标定位   计算节点   物联网技术   红外感应器   布置图   深化设计  

摘要： 技术内容钢结构深化设计是以施工图、计算书及其相关资料为依据,依托专业深化设计软件平台,建立三维实体模型,计算节点坐标定位调整值,并生成结构安装布置图、零构件图、报表清单等的一个全过程。钢结构深化设计与BIM结合,实现了模型信息化共享,由传统的“放样出图”延伸到施工全过程。物联网技术是通过射频识别、红外感应器等信息传感设备,按约定的协议,将物品与互联网相连接,进行信息交换和通讯,以实现智能化识别、定位、追踪、监控和管理的一种网络技术。在钢结构施工过程中应用物联网技术,改善了施工数据的采集、传递、存储、分析、使用等环节,将人员、材料、机器、产品等与施工管理、决策建立更为密切的关系,并可进一步将信息与BIM模型进行关联,提高施工效率、产品质量和企业创新能力,提升产品制造和企业的信息化管理水平。

关键词： 语音识别   智能粮仓   粮情追踪   环境监测   无线组网  

摘要： 针对传统粮仓的监管问题,设计一种基于语音识别与RFID技术的智慧粮仓系统,通过结合ASRM08-B语音模块、RFID技术、无线传感器网络、以太网通信技术实现。该系统由粮情监测、安防系统、智能联动和云平台构成。ZigBee终端节点通过传感器采集粮仓环境数据,通过无线方式传送给ZigBee协调器,并使用以太网作为主干网进行数据传输,最后传输到云平台和手机APP进行数据存储、处理和呈现,此外,可以通过语音模块或者手机APP直接与粮仓中设备联动,为粮仓管理系统设计提供了新思路。

关键词： 无线通信   RFID   ZigBee   物联网   智慧农场  

摘要： 国内信息化牧场用于精准养殖的设备长期由Afikim公司垄断,同时自建数据库互不兼容的问题将会产生数据孤岛,国内牧场的养殖受制于人且成本高昂,在国际上综合竞争力不高。本文针对牧场养殖中的监测设备,设计了包含RFID芯片、计步器和ZigBee通信模块的电子耳标,可用于奶牛身份识别、运动监测及数据上传。其中,RFID芯片的设计基于GJB7377.1协议,计步传感器采用水银开关并采用亿百特E180-ZG120A EFR32作为ZigBee终端设备实现无线通信。综合之下,单个自主设计的可穿戴监测设备的成本远低于采购Afikim设备的成本,并且基于统一标准搭建数据平台,可以有效打破数据孤岛问题,大大降低国内牧场对于国外技术的依赖。

关键词： 信息矿灯   精确定位   恒流驱动   UWB   RFID  

摘要： 设计一种低功耗多模定位的信息矿灯,通过多模射频技术的融合及射频调度方法,可满足矿方实现从区域定位向超宽带精确定位无缝过渡升级;采用PA功率放大器、LNA低噪声放大器优化UWB射频技术的传输距离及测距准确性,以解决井下位置服务系统的基站容量及经济费用;同时,可升级设计实现了差异化定制使用需求,能更好地为煤矿提供井下位置信息服务。

关键词： 应用标准   RFID   合格血液储存库   管理模型  

摘要： 应用标准是标准中的小众类别,有过此类标准编制经验的人员较少,因而有必要对应用标准编制有关课题进行研讨。本文以《血站合格血液储存库射频识别(RFID)技术应用规范》为例,讨论了应用标准编写时应当关注的问题、编制步骤、核心技术要素、经验总结等,对有关单位开展技术应用规范类标准的编写具有重要的参考意义。

关键词： 射频识别   概述   港口   应用  

摘要： 介绍了射频识别的发展史,论述了射频识别在国际上和在我国的应用,分析了射频识别在港口行业中的应用,进而提出展望。