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关键词： RFID   室内定位   卡尔曼滤波  

摘要： 本文主要使用RFID技术确定物体在空间中的位置坐标,设计了一种STM32作为主控芯片,步进电机作为运动装置,RFID模块及天线作为通信装置的室内定位装置。可以较为精确得解算出贴有RFID标签的物体得位置信息。

关键词： 安防   陪伴   ROS   SLAM   RFID   人脸识别  

摘要： 本文针对居家安防及老人陪伴等问题,设计了一种运行ROS(Robot Operating System)的居家安防机器人,其以x86处理器为主处理器,STM32F103C8T6微控制器为辅控制器。提供自动巡逻、语音交互、访客识别、物品搜索等功能,自动规划路径基于SLAM算法,多传感器融合。提供有特异性人脸识别来鉴别来访人员;自动巡逻;语音交互,方便下达命令及日常对话;搭载高频RFID天线,提供语音查找物品功能。其可以较为有效的增加居家安防等级,并为老人提供日常陪伴。

关键词： RFID   药品供应链   可追溯性  

摘要： RFID技术应用的主要目的是为了提高药品供应链的管理质量,并且此项应用也加强了药品流程的监管力度,使其更加具备安全性,并且长期处于稳定状态内,不断为我国各大医院提供稳定供应需求,不断满足医院要求。此项应用也为药品供应链提出了一个较为系统性的供应方案,解决了管理工作中出现的各类问题,并且完善了整个药品供应链,逐步为其提供了具有针对性的解决措施。基于此本文对RFID的药品供应链中可追溯性进行分析,并且深入研究了RFID技术的优势,尤其是在管理流程中,后期针对我国目前市场情况和整体规模进行了展望。

关键词： Sensors   Antennas   Impedance   Wearable sensors   Wireless communication   Dipole antennas   Wireless sensor networks   Battery less   e-textile   RFID   wearable sensor  

摘要： Wearable sensors demand flexible and concealable devices that can be seamlessly integrated with apparels and clothes. E-textile sensors and devices, built from specially functionalized fibers and yarns and constructed with embroidery and woven processes, provide an ideal solution for different wearable applications. In this article, we propose a textile-based, embroidered passive strain and displacement sensor functioned as a UHF RFID antenna that can be aesthetically integrated with garment fabrics. The antenna structure consists of a dipole arm and a coupling loop mounted with an RFID chip. The displacement between the loop and dipole arm will alter the impedance of the antenna and consequently modulate the backscattered signals from the RFID chip to the reader. The sensor is passive, i.e., no battery is needed on the sensor and the sensing information can be wirelessly retrieved by the reader from a few meters away. The structure is sensitive to strains and displacement caused by body movement. Our experiments demonstrate different applications for this sensor, i.e., when the sensor is embroidered on different locations on human body, such as breast, knees, and elbows, it can be used as a respiration monitor, gesture indicator, etc. to conveniently track and log various forms of body movements.

关键词： Anti-collision algorithm   RFID system   Tag identification   Tag reading   Vehicle localization  

摘要： With the development of radio frequency identification (RFID) technology, RFID systems on roads (RSR) have recently been put forward to localize not only manned vehicles but also autonomous vehicles. In such an RFID-based localization infrastructure, passive RFID tags with road-related information are deployed on road surfaces, and any vehicle equipped with an RFID reader can interrogate the tags to obtain its locations. However, like traditional RFID systems, reader collisions could occur when many vehicles (readers) continuously move in and out of a tag's reading range, significantly degrading tag reading performance. Although many anti-collision algorithms have been devised to improve tag reading efficiency, none can be applied in highly mobile and dynamic road environments. In this paper, we propose an adaptive mobile tag reading algorithm, which can effectively reduce reader collisions and improve tag reading efficiency for reliable vehicle localization under various traffic scenarios. Extensive simulation and experiment have verified the feasibility and the effectiveness of our proposed scheme. Particularly, the field tests demonstrate that, with moderate vehicle density and sparsely deployed tags, our proposed algorithm can satisfy the tag reading requirements specified by the upper-layer localization system with a probability as high as 0.976.

关键词： Information management  

摘要： Based on the in-depth study of two technologies, wireless sensor network, and RFID technology, this paper proposes a corresponding solution to the urgent storage positioning problem and the safety of goods in transit in the logistics supply chain process. And on this basis, it broadens the whole logistics process of warehousing and distribution and designs a framework of intelligent logistics supply chain management system with wireless sensor network and RFID technology to realize the management process of logistics main business. For the problems of complicated hardware wiring, the excessive number of positioning nodes and low effective coverage rate of traditional RFID-based positioning methods in large-scale warehousing environment, the integrated RFID and wireless sensor network fusion technology constructs a new movable anchor node, divides the nodes in the traditional positioning process into fixed anchors and mobile anchors, proposes a secondary positioning method, improves positioning accuracy and effective coverage rate, and provides a new positioning method for large-scale storage environment. For the transportation of goods in transit, especially precious and dangerous goods, a six-axis acceleration sensor-based method for detecting the behavioral attitude of goods in transit is proposed. Time window slicing of cargo motion data stream is performed to reduce data processing and based on the statistical features of a large amount of experimental data, and feature vectors and classifiers are analyzed and designed to achieve behavioral attitude classification of goods in transit. The experiment proves that this method has high recognition accuracy and has certain practical application value. Finally, the whole storage and distribution logistics process is integrated, the framework of intelligent logistics supply chain management system combining WSN and RFID is built based on wireless sensor network software and hardware platform, and the detailed design of

关键词： RFID技术   电力工程物资   仓储管理  

摘要： 随着电网的快速发展,电压等级越来越高,电力基础建设步入高效阶段。在电力工程施工过程中,电力物资、施工装备和工器具所需数量庞大、种类繁杂,作为电力工程建设的基础环节,电力工程物资的调度情况严重影响着工程的进度。针对电力工程物资、施工装备和工器具的现场仓储问题,基于RFID技术的快速扫描、无屏障阅读等特点,并结合传统仓储管理的文字、出入库台账记录,实现施工现场物资仓储管理的精细化、系统化和信息化,优化现有管理模式,方便材料员对电力工程物资进行监管,提高管理水平和调度效率。

关键词： Monitoring   Radiofrequency identification   Sensors   Wireless sensor networks   Wireless fidelity   Biomedical monitoring   Doppler radar   RFID   vital signs   Internet of Things   respiration monitoring  

摘要： In health assessment and disease prevention, vital signs such as breathing rate, heartbeat rate, blood pressure and posturography play a critical role. Not only the elderly, but also young people need to pay attention to vital signs monitoring because more and more young people die of sudden diseases, such as sudden death and myocardial infarction. Traditional vital signs monitoring methods are invasive and inconvenient to use, especially for the elderly because these methods usually require users to wear some dedicated sensors. In recent years, some non-invasive vital signs monitoring methods based on wireless sensing have been proposed. Usually, these methods need the user to remain still. When the user walks around, these methods cannot work well. One of the challenges of mobile people breathing monitoring is that the small body chest displacement caused by breathing is disturbed by people's walking. In this paper, we propose RF-RES, which is an accurate continuous breathing monitoring method based on RFID technology and uses a pair of tags to eliminate the influence of the user's body movement. We merge the data of the tag pairs to eliminate the influence of the user's entire body movement and propose an algorithm based on doppler frequency shift to track the user's displacement during exercise. We conduct practical experiments to evaluate the performance with Impinj R420 and passive tags. The results show that RF-RES achieves accurate respiratory rate monitoring when estimating the respiratory rate of different users, with an average error of 0.54 BPM.

关键词： 射频识别技术   RFID   定位  

摘要： 针对传统室内定位中RSSI不稳定、室内定位精度低问题,本文采用链路稳定性高的收包率(PRR),抗干扰能力强。本文提出了一种新型的定位模型,用收包率确定的几何圆环重叠来限制划分定位区域,建立位置指纹识别库,每个位置指纹都能唯一映射到一块定位区域;并且通过布置参考标签用KNN算法进一步精确定位,找到物体。聚类划分收包率区域允许室内多径效应导致的收包率波动,增加了模型的鲁棒性,KNN算法采用邻近参考标签确定目标标签具体位置,进一步提高模型的准确性。

关键词： 射频识别   标签   标签天线   抗金属   滚动型  

摘要： 射频识别(RFID)技术在工业探测领域的应用不断深入,对RFID标签在多金属环境中的读取性能提出了更高的要求,本文提出一种可以在金属表面任意滚动的高效率RFID标签天线。所设计的滚动型标签天线是由倒F天线(IFA)进化而成,天线采用了呈柱状布局的4个辐射臂,其中一组相对的两臂通过馈电面与同轴线芯线相连,另一组相对两臂与同轴线外导体相连,一开槽的矩形辅助面置于四个辐射臂中心。标签天线体积为11.3 mm×11.3 mm×77.5 mm,在金属平面上各种状态滚动时中心频率变化范围为897~932 MHz,|S_(11)|≤-10 dB的带宽范围为3.5~8 MHz,天线辐射效率达到70%。该无源标签天线具有可以在金属背景环境中任意滚动、小型化、高效率等优势,无源标签天线与温度传感器芯片相连,可用于工业物联网复杂环境温度探测。