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关键词： Internet of things  

摘要： Based on the fusion of wireless sensor modules and UHF RFID readers, this paper develops a UHF RFID reading and writing system based on wireless sensing technology and designs a communication interface circuit that integrates wireless sensing and RFID technology. The financial supervision mechanism of the Internet of Things compatible with these two technologies improves the communication distance limitation of the RFID system and improves the flexibility of the RFID reading and writing system. Secondly, in view of the security issues of WSN small and medium data distribution, this paper proposes a lightweight small data supply chain financial supervision program. The solution adopts two-way authentication technology based on the improvement of the Internet of Things supply chain, the negotiation of the Internet of Things supply chain, and a lightweight encryption algorithm, which realizes the secure communication between ordinary nodes and gateway nodes, and can more effectively solve the problem of small and medium data distribution in WSN to resist the deficiencies of the financial supervision mechanism;compared with existing solutions of the same magnitude, it has higher security and efficiency. Experimental simulation shows that an important problem in the converged network is the imbalance of node energy consumption. In order to reduce the negative impact of the imbalance of energy consumption on the network, this article compares the two for direct transmission protocol and minimum energy multihop routing protocol. From the perspective of supply chain process performance, based on the proposed technical impact framework, it analyzes how companies actually carry out ID application work, making the research from general to individual, from theory to practice. The network energy consumption calculation method under this protocol improves an improved network architecture model that increases the communication scale. The test results show that the technical impact

关键词： 射频识别技术   手术室仪器设备   生命周期   设备管理  

摘要： 目的 探讨射频识别(radio frequency identification,RFID)技术在手术室仪器设备全生命周期管理中的应用研究情况.方法 从手术室仪器设备全生命周期管理角度出发,在设备前期购置、中期使用、后期监管三个方面,系统阐述了当前RFID技术在手术室仪器设备管理中的应用现状,并分析了当下RFID技术应用在手术室仪器设备管理领域发展的特点及趋势.结果 RFID技术在手术室设备管理中的应用带来设备管理的全面革新,大大提升设备静态管理效率,弥补动态管理不足,健全完善全生命周期管理体系.结论 运用RFID技术进行仪器设备全生命周期管理,提升购置管理水平,提高使用效率,增强监管效用,为建设信息化医院构建基础.

关键词： 资产盘点   智能   RFID技术   GPS技术  

摘要： 本文围绕云南电网有限责任公司资产盘点的现状,结合RFID、GPS技术构建智能盘点实施应用方案.

关键词： RFID network planning   Asset tracking   Directional antennas   Multi-antenna readers   Whale optimization algorithm   Simulated annealing  

摘要： Radio frequency identification (RFID) systems have been widely used for the inventory management and asset tracking in hospital industry. Although the total cost of an RFID system relies mostly on the number of readers, existing RFID network planning (RNP) techniques focused on single-port readers. This paper introduces a swarm intelligence RFID network planning model with multi-antenna readers (named RNP-MAR) to efficiently track medical assets in hospital environments. Our motivation is to utilize multi-port RFID readers, in order to minimize the total cost of the RFID network, and simultaneously maximizing the network coverage. To achieve this purpose, we consider three reader types with one, two, and four antenna ports. Moreover, different antenna models with different coverage characteristics are utilized to be allocated on the different ports of RFID readers. The aim of the RNP-MAR is not only to determine the optimal placements of the RFID readers in the hospital plan, but also to design the multi-antenna readers and their antennas. To efficiently solve the RNP-MAR model, a combined global-local linear-nonlinear metaheuristic based on whale optimization algorithm and simulated annealing (named WOA-SA) is presented. The multi-objective function of the WOA-SA is to maximize the network coverage, while minimizing the total cost, interference, collision, and power consumption. Simulation results show that the proposed method provides 39.57% saving (on average) in the total cost of the RFID network through efficiently utilizing multi-antenna RFID readers.

关键词： Progress monitoring   Resource tracking   Data fusion   Sensor-based technologies   Field test   RFID  

摘要： Purpose The purpose of this study is to monitor the progress of construction activities in an automated way by using sensor-based technologies for tracking multiple resources that are used in building construction. Design/methodology/approach An automated on-site progress monitoring approach was proposed and a proof-of-concept prototype was developed, followed by a field experimentation study at a high-rise building construction site. The developed approach was used to integrate sensor data collected from multiple resources used in different steps of an activity. It incorporated the domain-specific heuristics that were related to the site layout conditions and method of activity. Findings The prototype estimated the overall progress with 95% accuracy. More accurate and up-to-date progress measurement was achieved compared to the manual approach, and the need for visual inspections and manual data collection from the field was eliminated. Overall, the field experiments demonstrated that low-cost implementation is possible, if readily available or embedded sensors on equipment are used. Originality/value Previous studies either monitored one particular piece of equipment or the developed approaches were only applicable to limited activity types. This study demonstrated that it is technically feasible to determine progress at the site by fusing sensor data that are collected from multiple resources during the construction of building superstructure. The rule-based reasoning algorithms, which were developed based on a typical work practice of cranes and hoists, can be adapted to other activities that involve transferring bulk materials and use cranes and/or hoists for material handling.

关键词： Graphene  

摘要： Many researchers claim that graphene, a specially studied carbon allotrope, has a single layer of atoms organized in a two-dimensional honeycomb lattice. Because of its exceptional electronic and mechanical properties, it has a significant job to perform in redefining future technologies. Although graphene has made a major breakthrough to be considered for a wide area of applications, most of the interesting properties of graphene are still at the early stage of research. Graphene dependent attenuators and single and multi-frequency constructible antennas are designed employing the tunability of graphene. As the name indicates, the form of RF technology that uses electromagnetic fields for automatic identification purposes of tags attached to objects is termed as radio frequency identification (RFID). For years, the use of pricy raw materials and intricate fabrication processes in metal coating and metal based conductive inks in printed electronics kept the involved cost very high. So, it is inevitable to replace the existing fabrication process with cheaper materials and simpler techniques. Researchers assert that printed graphene has the potential to be a competent alternative for RFID applications.

关键词： Antenna sensor   Radio frequency identification (RFID)   Sensing system   Coupling effect   Crack detection  

摘要： Purpose The skin and skeleton of aircraft are connected by adhesives or rivets to bear and transfer aerodynamic load. It is easy for crack and fracture damage to occur under the action of cyclic load, thus reducing aircraft bearing capacity/integrity and causing serious security risks. Therefore, it is particularly important that passive wireless radio frequency identification (RFID) sensors be used for the health monitoring of aircraft skin in its whole life cycle. This paper aims to investigate the influence of miniaturization on the coupling effect between RFID tag sensors. Design/methodology/approach Two groups of crack sensing systems based on RFID tags were designed. Gain and mutual impedance of sensor tags were analyzed via mode analysis. The reliability of crack detection of both sensing systems was compared using a preset experimental scheme. Findings Miniaturized antennas can reduce edge influence and the coupling effect. Gain and mutual impedance decrease with the increase in distance between dual tags. Backscatter power shows a decreasing trend and threshold power to activate tags in reader antenna increases. Results show that the miniaturization of size is more suitable for the application of multiple sensors. Originality/value By comparing two groups of sensing systems, the consistency of crack detection sensitivity is better when small tags are placed in parallel, which provides a theoretical basis for the application of small, passive and densely distributed crack sensors in the future.

关键词： EPCglobal   RFID   agent-based simulation   supply chain   network partitioning  

摘要： The goal of this study is to introduce a new design approach of the EPCglobal network considering activities of actors in a supply chain via agent-based simulation (ABS). The EPCglobal network provides track and trace services of shipments for internal and external subscribers, based on electronic product code (EPC) data generated from radio frequency identification (RFID) tags. To maintain dependable mean response time and service failure of the network, the proposed approach consists of two modules: (1) ABS module with AnyLogic (R) simulation software involving transactions between actors (manufacturers, distributors, and retailers) and (2) Network partitioning module to find appropriate structure of the network based on responses given by the ABS module. Demonstration of the proposed approach will be conducted with data of an automotive supply chain in Republic of Korea. This preventive maintenance approach will help engineers avoid over-investment on implementation of the network for their efficient supply chain management.

关键词： 无人机   盘库作业   射频识别   三维环境航迹规划   差分进化算法   生命周期群搜索算法  

摘要： 盘库作业是各工业企业进销存系统中的重要环节,针对目前人工盘库工作效率低、容易出错等缺点,近年来出现了无人机搭载高精度便携式射频识别阅读器进行库存盘点的技术。其中,航迹规划是需要解决的关键问题。为减少能耗并提高盘库效率,以能效比最低以及时效比最小为目标来构造目标函数,建立了相应的无人机航迹规划数学模型,提出一种基于生命周期群搜索的混合差分进化算法。利用某烟草工业企业原辅物料仓库的实际环境数据进行物理建模,进一步利用所提出的智能优化算法进行仿真实验。最后,在相同的环境下,与其他3种前沿航迹规划算法进行对比,结果表明利用所提算法规划出的路径更能有效地提高无人机盘点效率。