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关键词： 3D printing   RFID   Liquid antenna   Sensor   Bio-sensing   Essential oil  

摘要： This paper presents a novel 3D-printable polymer-based liquid antenna for radio frequency identification (RFID) in the ultrahigh-frequency (UHF) band. Fused deposition modelling, the most widespread and inexpensive 3D printing technique, is used for printing a substrate including polypropylene (PP) and acrylonitrile butadiene styrene (ABS). An ALN-9762-WRW type RFID tag containing a meander metal antenna is modified and printed with microfluidic channels in the substrate. As an ionic liquid, a saltwater dilution is injected into the microfluidic channels designed via a computer-aided design program. A fabricated hybrid liquid antenna is tested using a 200mW UHF RFID reader with the ISO 18000-6C EPC Gen2 protocol. The sensitivity to liquid antenna radiation is measured at distances of 20–900 mm by varying saltwater dilution’s salinity and conductivity between 0 and 12000 ppm and 0-20000μS, respectively. Besides saltwater, an essential oil, peppermint oil (C 62 H 108 O 7 ), is also used for liquid antenna. The absorption, refraction, reflection, and scattering characteristics of the polymer substratum are explored in the estimation method. The essential oil produces a buffer area in the 3D layers, which can change the polarization of the antenna. The designed and fabricated 3D-printed hybrid liquid antenna can be utilized in embedded systems suitable for chemical or biological sensing within perpetual systems such as blood or oil circuits.

关键词： 射频无线通信   RFID   控制柜  

摘要： 本文设计的这款基于RFID的控制柜降温除湿系统,主要包括主模块通过搭载不同传感器完成对控制柜内部温度、湿度参数采集,通过无线通信模块上传到控制中心实现远程通信,采集中按键功能对控制柜内部阈值进行设定,控制器会将实时采集到的参数与设定阈值进行比较,检验是否超过设定阈值,如果超过设定阈值则报警,如在设定范围内则为通过。从模块主要是对主模块采集到的温湿度数据进行接收显示。

关键词： RFID原理及应用   教学实践   课程融合   教育云  

摘要： 为解决当前《RFID原理及应用》课程教学中存在的问题,提升教学质量,对当前的教学实践进行反思与总结。结合职教云、微课等新出现的一些支撑信息化教学改革的新手段新方法,采取转变传统单一的课上教师教,学生被动学,课后学生简单完成作业的教学模式。深入分析目前学生学习与吸收新知识方式的多样性特点,采用多课程深度融合,多教学途径并用的策略对课程教学的形式、内容及评估进行必要改革,以此促进学生学习的积极性,提高教学质量。

关键词： RFID   pin tumbler lock   breakthrough resistance  

摘要： At present, modern technologies are increasingly coming to the fore, including the area of entry security. Electronic access control systems that use RFID to identify people have become popular. However, as the name suggests, electricity is needed to operate them. There may be a power failure problem, causing the system to malfunction and entry is not allowed. Therefore, classic pin tumbler locks are used as a backup for electrical systems. Therefore, it is important to keep in mind the correct choice of pin tumbler locks, as these can be easily overcome, unlike the electronic access control system with RFID. The article deals with foreign research aimed at overcoming the electronic access control system with RFID and completed tests at the Faculty of Security Engineering aimed at overcoming pin tumbler locks.

关键词： RFID   book inventory   deep neural network   1D barcode   2D barcode  

摘要： In view of the disadvantages of the existing popular RFID (Radio Frequency Identification) book inventory in the industry, such as expensive equipment, low accuracy, and high business threshold, this paper proposes a deep neural network-based inventory framework. By loading different deep neural network algorithm modules, the proposed framework is able to complete target detection of 1D/2D barcodes in photos or video streams. Faster R-CNN is used for 2D barcode and SSD-ResNet for 1D barcode. Then the target barcode and the coordinates of the barcode are intercepted, the books are sorted by the barcode coordinates, and the values are obtained through the barcode recognition to realize the book inventory. Through inventory test on 1D/2D barcode book, the accuracy and recall rate of the framework reached above 99%, with precision rate close to 100%. Compared with RFID inventory, the proposed deep neural network based inventory method is more accurate and precise, and increased the processing speed by around 35%.

关键词： BIM+RFID   装配式构件   生产管理  

摘要： 近年来,建筑业转型升级日益加剧,对装配式构件生产企业而言,传统的采用人工进行数据采集、处理、分析的方式早已不能满足企业发展的需求,传统的生产管理方式的弊端日益明显,急需对其进行改革。本文通过分析装配式构件生产管理中存在的一些问题,提出了基于BIM+RFID技术的装配式构件生产管理平台框架,力图通过现有的信息技术改善传统生产管理方式的不足,为装配式构件生产企业信息化、现代化管理提供参考意见。

关键词： 智能化   RFID   车牌标签   车辆管理   天线设计   挡风玻璃   电子车牌  

摘要： 在目前的RFID汽车管理的应用中,其管理方案基本都是在前挡风玻璃上粘贴一个RFID标签。然而随着现在带有加热丝挡风玻璃的普及,这种安装方式已经不能覆盖所有车型,标签安装在部分汽车上之后根本读不到。基于这种现状,给出了一种新型的天线设计方案,依靠汽车车牌这一交管部门必管控的部件,研发一种不拆卸车牌即可安装的新型RFID标签,可以解决标签因汽车差异化而导致的标签读不到、读距参差不齐的问题,极大地方便交管部门管理和监督社会车辆。

关键词： RFID   轨道交通   无人驾驶   精准停车   制动辅助  

摘要： 为了解决轨道交通无人驾驶技术的精准停车问题,采用RFID技术对轨道上的车辆进行高精度定位,并提出一种适用于轨道交通无人驾驶车辆精准停车的分级减速制动方案和轨道交通无人驾驶车辆精准停车制动辅助系统。该系统为车身智能控制系统提供用于精准停车的减速制动辅助信息,大大降低了轨道交通无人驾驶实现精准停车的难度。

关键词： RFID   物联网   载体管理   HF/UHF   移动通信   数据采集  

摘要： 为了解决当前大量重要载体在人工管理中的局限性,实现对载体内、外场流转过程的全生命周期管理,提出一种基于HF/UHF双频段无源RFID技术的载体管理系统设计方案。文中对系统硬件组成、软件设计以及载体流转中的典型应用过程进行了分析。过程模拟分析表明,该系统可有效提升在各种场景下对重要载体的技术管理能力,保证载体管理的安全性以及实效性。

关键词： 走行部   射频识别   螺栓   防松脱   管理软件开发  

摘要： 动车组走行部的安全是动车组运行安全的重中之重,针对动车组列车在运用中存在的走行部螺栓松脱隐患,螺栓的紧固防松至关重要,安全责任重大。采用更加先进的“技防”手段来提升检测效率,从防松脱预警角度出发,结合RFID(Radio Frequency Identification)技术,通过信息化、系统化等措施,达到动车组走行部关键部件螺栓防松脱预警的目的,满足国家关于信息系统安全方面的有关政策要求,切合铁路信息安全系统建设要求及特点。整个系统融入敏捷软件开发思想,采用面向框架的应用平台开发模式,做到了应用系统体系结构的复用。经过实车检测试验,运行效果良好,可以将本系统作为通用预警方案推广应用。