教学课程资源库 更多>>

关键词： Chipless RFID tag   Equivalent circuit model   Miniaturization   Radar cross-section (RCS)   Radio-frequency identification (RFID)   Surface current distribution  

摘要： An 8-bit chipless radio-frequency identification (RFID) tag with a compact structure is proposed in this paper. Designing a RFID tag with a compact size is highly demanded in RFID technology. The original RFID tag is composed of 8 octagonal rings. In order to minimize its dimensions, the tag is divided in two equal parts. One part is completely omitted with its substrate. A grounded wall is placed in front of the remaining part to compensate the effects of the removed part and generate an image of it. Comparing a radar cross-section (RCS) of the compact and normal structure implies that by minimizing the tag, the RCS response of the structure is approximately similar with that of the normal tag. An equivalent circuit model for the RFID tag is presented, which shows a reasonable agreement with its full-wave result. The presented tag exhibits an RCS of sigma = -26 dBsm from 2 to 7 GHz with an overall size of 15 x 30 mm(2). Through using the aforementioned method, a 50% reduction in the overall area of the structure is observed.

关键词： 射频识别(RFID)技术   电力工程   数据优化   回溯识别  

摘要： 针对电力工程的质量问题,研究了基于射频识别(Radio Frequency Identification,RFID)技术的监理人员需求回溯模型。利用RFID技术对监理人员的需求进行数据采集,并利用多传感器数据融合技术,提高数据的可靠性,降低冗余数据;利用特征融合的方式,结合利用贝叶斯决策算法和相关性函数,实现工程质量的针对性管控。通过仿真数据验证,以施工电缆为例,通过数据样本空间的修正,可以顺利实现工程质量问题的回溯效果,准确率超过95%,证明本模型的有效性。

关键词： RFID   资产管理   专利申请  

摘要： 近年来,RFID技术高速发展且应用于社会多个领域,本文以RFID技术应用在资产管理中的专利申请数据信息作为分析样本,并针对上述专利文献的国内申请发展趋势、主要申请人分布、专利技术情况、知识产权运营等方面进行统计分析,整体上了解RFID技术在资产管理中的发展历程,为科研人员继续研发相关技术以及相关企业在提高专利转化率方面提供参考。

关键词： 物联网技术   智慧物流   物流管理   RFID技术  

摘要： 在当前社会背景下,物联网技术高速发展,已经渗透到生产和生活的方方面面中,也带动了传统物流行业的智慧化转型。文章简要阐述物联网的概念和关键技术,分析了物联网技术在物流主要环节的应用现状,并在此基础上构建基于物联网技术的智慧物流体系架构,提出了可行的智慧物流发展策略,旨在推动物联网背景下物流行业的智慧化转型。

关键词： 物联网   STM32   RFID   人流量   蓝牙   Android  

摘要： 针对体育馆各区域难以实施监测和场馆管理人员工作量大等问题,提出一种基于物联网的体育馆人流量监测系统设计方案。系统以STM32F103RCT6芯片为核心,采用RFID技术采集体育馆人流量数据;利用蓝牙技术,以无线传输方式将数据传到手机APP,便于场馆工作人员实时掌握数据。实验表明:手机APP可实时查看场馆人流量,读取卡的状态和余额,根据需要对射频卡进行充值,满足场馆管理与服务的需求。

关键词： 超高频   射频识别   标签天线   抗金属   滚动型   高效率  

摘要： 提出一种滚动型抗金属超高频RFID标签天线。标签天线为正八边形柱状结构,四个天线辐射臂设计在正八边形的拐角处,其中一组相邻两臂通过馈电面与同轴线内导体相连,另一组相邻两臂通过接地面与同轴线外导体相连,标签天线芯片连接于同轴线的另一端。标签天线体积为76 mm×13 mm×13 mm。在金属面上滚动至各种放置状态时,天线中心频率变化范围为900~923 MHz,|S11|≤-10 dB的带宽为9~14 MHz,天线辐射效率均超过80%。该标签天线具有可以在金属背景环境中任意面滚动以及小型化、高效率等优势,适用于复杂工业物联网环境的RFID系统中。

关键词： Recycling   Plastics   RFID tags   Costs   Metals   Glass   Random forests   Automated material identification   chipless radio frequency identification (RFID)   circular ring resonators (CRRs)   random forest classification   recycling chain  

摘要： The utility of chipless radio frequency identification (RFID) technology for the identification of eight materials (seven plastic types and glass) in the recycling chain is examined. We first demonstrate how the frequency response of eight circular ring resonators (CRRs), designed to operate in the 1.5-6-GHz band, is used to encode eight unique material IDs. Tagged items are inserted one at a time in front of a chipless RFID reader and the speed and accuracy of material identification, based on the ability to decode the tag's frequency response, is determined. We demonstrate the ability to correctly identify the material type using a random forest classifier with up to 93% accuracy while being 3-16x faster than other methods reported in the literature. A technique to further improve the detection speed, taking measurements with lower resolution, at the cost of accuracy is then presented. Finally, future directions of exploration are discussed.

关键词： RFID技术   智能快递柜   身份识别   WMS  

摘要： 校外CN自提式快递点取货时间集中、取货效率低、设施设备落后、排队现象严重、人员服务较差,无法满足师生的需求。文章研究分析了CN自提点的发展现状以及存在的问题,结合RFID技术、智能快递柜、身份识别系统、WMS仓储管理系统等并优化了站内布局,从而形成一个新的自提式快递点取货方案,提高取件效率,满足师生需求。

关键词： Substrates   Sensors   Ink   Costs   Packaging   Printing   RFID tags   Chipless radio frequency identification (RFID)   metasurfaces   packaging industry   software defined radio (SDR)  

摘要： Increasing competitiveness, as well as levels of sustainability, are some of the main challenges that the packaging sector is facing. The introduction of information and communication technologies provides new functionalities, such as traceability within logistic processes. In this context, radio frequency identification (RFID) technologies can play a key role but can also pose hurdles, owing to increased cost, as well as difficulties in relation with recycling and complying with product circularity. In this sense chipless RFID opens new possibilities, by avoiding the use of information coded chips, reducing costs in material and placement, as well by improving recyclability. In this work, a frequency-based chipless RFID solution is presented, in which 2-D geometrical patterns printed with conductive ink, resembling transmitive or reflective metasurfaces, are designed and integrated within paper-based substrates. An in-house reader system is implemented based on conventional software-defined radio (SDR) platforms in the 0-6 GHz and in the 0-12 GHz range, in which received signal postprocessing is performed to increase reader sensitivity, without the need for using vector network analyzer (VNA) equipment. Moreover, in order to reduce material waste, an automatic fault detection system based on artificial vision coupled to a robot arm is designed and tested. Different prototypes in paper substrates, as well as in reference printed circuit boards, have been fabricated and measured, showing good agreement. The proposed solution provides a feasible chipless RFID system with a portable low-cost reader, which can be embedded in paper/cardboard materials in packaging applications.