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关键词： Sensors   Antennas   Impedance   Antenna measurements   RFID tags   Semiconductor device measurement   UHF measurements   Differential measurement technique   sensors   setup-independent radio-frequency identification (RFID) sensing technique   ultrahigh frequency RFID (UHF RFID) technology  

摘要： Ultrahigh frequency radio-frequency identification (UHF RFID) technology using transducer-integrated antennas provides a cost-effective option for sensing. A novel setup-independent UHF RFID sensing system that can overcome challenges caused by the measurement setup with a priori unknown mutual distance and orientation between the tag and the read/write device (RWD) is proposed. The concept is based on using off-the-shelf radio-frequency identification (RFID) chips having self-tuning capability, which maximizes power transfer coefficient between RFID chip and RFID antenna. An ON-OFF differential (OOD) measurement is implemented to provide setup-independent sensing. The OOD parameters form a 3-D vector that can support more sensing states than prior art using single-dimensional information. Power transfer efficiency (PTE) and tag sensor efficiency (TSE) are defined, where PTE is the minimal power transfer coefficient in all sensing states and TSE is the minimal pairwise Euclidean distance of the OOD parameters. The RFID antenna layout is optimized by optimizing PTE and TSE simultaneously so as to offer sensing robustness without sacrificing communication performance in all sensing states. A water filling-level sensor has been designed and evaluated. Theoretical predications are favorably compared with experimental results under different measurement setups, having different relative distances and orientations between the tag and RWD.

关键词： RFID技术   卸车实况   开发软件   自动跟踪  

摘要： 模拟运输大宗原料的火车车组进入目的地卸车区域的卸车实况,将车皮料种信息动态展示,当卸料车皮存在混料、空车时及时报警,以指导岗位工生产操作,卸车结束自动将原料归入对应库区统计。采用RFID技术识别车号,开发软件判断车组行驶方向,并通过MQTT服务器发布车号信息,再结合柳钢MES系统完整数据流实现目的。成功研发、应用系统,实现对烧结厂大宗原料进场全流程数字化自动跟踪。该系统投用后,能显著降低劳动强度,提升生产效率和管理水平,具有良好的社会效益和经济效益。

关键词： STM32   激光雷达   路径规划   语音问答   RFID  

摘要： 项目是基于STM32单片机的一款智能多功能护理车。护理车主要针对医院运输作业需求,能够实现自主路径规划、运输医疗用品、温湿度检测、语音问答等功能。通过护理车自主运输可有效节省运输成本,同时减少运输过程中被感染的风险。

关键词： 智能物流   托盘   RFID   技术  

摘要： 托盘是物流运输仓储中最基本单元化工具。“十四五”时期,构建智能物流托盘系统是物流数字化升级的重要任务,是移动智能化的重要载体和高效供应链协同的重要平台。使用新型材料模压制造的绿色可循环使用托盘,预留了RFID芯片安置盒,并结合RFID、5G以及物联网技术,通过智能终端和操作系统对托盘进行数字“赋能”。在今后的应用中,智能物流托盘将从单一RFID标签到多功能标签,从单一物流体系到多链体系,实现托盘的序列化、智能化和数字化。

关键词： 手持机   工具管理   RFID   WiFi   数据交互   Android  

摘要： 针对现有车间工具使用存放不合理所导致的工具缺失或丢失问题,文中分析了RFID技术的原理和应用特点,提出一种基于RFID和WiFi的车间工具管理手持机的系统设计方案。该手持机基于Android平台开发,同一WiFi下利用JDBC技术访问智能工具柜的远程数据库并进行数据交互,实现了用户登录管理和缺失工具的指定查找功能。经测试,该系统能有效地提高车间工具的使用效率,减少工具的丢失,具有良好的实用价值。

关键词： Gain enhancement   miniaturized antennas   radio frequency identification (RFID)   wireless power transfer (WPT)  

摘要： A composite approach is proposed to design a miniaturized dual-polarized antenna with high gain for wireless power transfer and radio frequency identification. The compact antenna has a small ground plane and a low profile. It consists of a patterned driven patch, an air substrate, a slotted ground, and feeding and parasitic patches. The current distribution on it is elaborately tailored to fulfill miniaturization and gain enhancement simultaneously. The multipolar analysis method is applied to guide and clarify the design process. The overall antenna size can be reduced to 0.3 lambda(0) x 0.3 lambda(0) x 0.015 lambda(0), whereas the gain still reaches 5.6 dBi, implying an effective-to-physical aperture ratio of 3. Moreover, the input matching, port isolation, and cross-polarization suppression are also discussed. The proximity coupling approach and structural symmetry are utilized for performance improvement.

关键词： Dispensing Conformity   Error Detection   Hospital Management Systems   Medicines Dispensing Errors   Passive RFID   Patient Safety   Radiofrequency Identification   Similarity  

摘要： Errors from dispensing medicines, as part of medication errors, can have deadly consequences. Notwithstanding the occasional incidental reports, the impact of such errors remains significant given the high amount of medicines distributed daily. Here, the authors case studied the medication dispensing errors and the resulting impact on patient safety vis-a-vis a medico-surgical emergency department of a local university hospital center. The approach comprises two parts: first, an estimation of medication dispensing error rates;and second, a suggested passive radio frequency identification based solution aimed to reduce such incidents. The benefits of the adapted novel solution relative to the commonly used systems will be highlighted. They conclude with an overview of the study results and provides insights on how attending to this key challenge of medication dispensing errors will further enhance future health informatics practices and research.

关键词： Games and Simulations   Operations Management   Supply Chain Management   and Technology and Innovation  

摘要： The increasingly complex retail environment faces many inventory management challenges. Automatic identification and data capture (AIDC) technologies have been applied by retailers to address these challenges, with mixed levels of success. This article presents a classroom simulation of a retail environment in which students utilize a bar code scanner and a radio frequency identification (RFID) reader to manage inventory for the simulated retailer. From the simulation, students gain hands-on experience with these technologies, learn about the advantages and disadvantages of the technologies, and discuss additional cutting-edge AIDC technology.

关键词： Acoustic navigation   Angle of arrival   Bluetooth   FM   GPS   Indoor localization   Inertial navigation system   Infrared   Received signal strength   RFID   Time of arrival   Ultrasonic navigation   Wi-fi   Zigbee  

摘要： This paper introduces a review article on indoor localization techniques and technologies. The paper starts with current localization systems and summarizes comparisons between these systems in terms of accuracy, cost, advantages, and disadvantages. Also, the paper presents different detection techniques and compare them in terms of accuracy and cost. Finally, localization methods and algorithms, including angle of arrival (AOA), time of arrival (TOA), and recived signal strength (RSS) are introduced. The study contains concepts, requirements, and specifications for each category of methods presents pros and cons for investigated methods, and conducts comparisons between them.

关键词： coaxial   IoT   LCX   leaky‐   wave antenna   resonator  

摘要： An antenna cable for enhancing and adjusting radio coverage is proposed. The presented solution is applied to the UHF RFID range of 866 MHz. With this leaky-wave antenna cable, radio coverage can be efficient and customizable. A 10 x 100 mm resonator patch is attached on an opening on the cable's outer conductor to improve its radiating properties. The effect of its displacement is studied through simulations and measurements. The alignment affects both resonance frequency and signal strength. One resonator increases the radiated power by 2 dB (37%), multipliable by adding resonators. However, alignment accuracy of millimeters is needed in many cases. The greatest effect in both operating frequency and transmission loss magnitude comes from lifting the resonator from the cable's surface, averagely being 7.6% and 8.6% per mm in measured operating frequency and linear magnitude of S-21, respectively. Smallest changes are observed when moving the resonator along the cable, being 0.8% and 0.7% per mm, respectively.