RFID技术在汽车生产线上的应用现状

介绍了RFID的基本原理,总结了RFID技术在汽车生产中的应用成果,并结合汽车焊接生产线、涂装生产线和总装生产线上的实际应用环境,阐述了应用RFID技术实现汽车生产线的实时数据采集和质量监控的可行性和先进性,以及RFID技术在汽车生产线上应用存在的问题和应对措施.     

基于现场总线的RFID生产线集成控制系统

提出基于现场总线的无线射频识别技术(RFID)与生产线控制系统的集成架构,分析了该架构中RFID数据采集单元的功能组成,开发了具有CAN总线接口的RFID数据采集单元,建立了一个基于CAN总线的RFID生产线集成控制实验系统。与现有的RFID在生产线上的应用相比,该系统结构简单,RFID标签所承载的信息更加丰富,信息交互更为直接、快捷,具有更高的可靠性和实时性。     

基于RFID技术的数字化生产线研究

现代制造业面向订单,具有多品种小批量的特点,这就要求企业能够及时根据订单调整生产,按时完成订单。数字化生产线可以满足现代制造过程的这一特点。扼要论述了在数字化生产线上应用RFID技术的必要性,简要阐明了RFID技术和数字化生产线,并给出了RFID阅读器的实现。以冰箱生产过程为例,具体论述了整个系统的总体设计方案,生产线上的连接及系统的数据处理方式。     

汽车制造生产线上RFID应用模式研究

从企业管理和生产环节两方面对无线射频识别(RFID)的应用需求进行分析,研究RFID在汽车制造生产线上的应用模式,构造一个基于RFID的汽车制造生产线垂直分布式应用模型体系框架,给出各功能模块的实现流程。应用结果证明,该模型可以解决生产过程中存在的信息采集数据缺失和遗漏、人工操作效率低下等问题,满足汽车制造生产线数据信息采集的实时性和准确性要求。     

RFID数据传输与安全

RFID技术已经在集装箱管理、生产线调度、食品追踪追溯等一些领域取得成功应用,并引起广泛关注,这是由RFID的技术特性决定的,但同时,RFID的技术特性在数据传输速率、成本与安全方面却存在着难以调和的怪圈。     

基于RFID技术的服装生产过程管理系统设计

针对现阶段服装企业在生产过程中的生产信息多样化以及生产数据反馈不及时的问题,设计了一种基于RFID技术的服装生产过程管理系统.通过对服装生产过程的分析,搭建了由 RFID数据采集端、人机交互程序和云服务器数据库组成的系统总体结构,并介绍了服装生产线上 RFID读卡器的具体布点.采用 RFID与嵌入式技术,完成了 RFID数据采集端的软硬件设计,并使用 MySQL构建关系数据库系统,同时完成数据信息建模和人机交互程序的设计.     

面向生产线的RFID系统设计及通信特性分析

设计一种面向生产线的无线射频识别(RFID)系统框架,在分析基于电子产品编码协议的RFID系统通信过程的基础上,进行RFID系统框架的总体仿真和通信特性分析。利用Simulink中S函数实现了编、解码模块和基带码元功能模块,并采用16-QAM调制方式,在Rician衰减(伦琴衰减)和加性高斯白噪声的自动化生产线环境中,得到信噪比和误码率的关系。仿真结果表明所建立的系统框架可行,提高了数据传输速率,增强了数据传输的可靠性,为科学合理地设计RFID系统提供了参考。     

基于RFID的生产线物料监控系统的设计与应用*

介绍了近年兴起的射频识别（RFID）技术的特点,并给出了一个实际加工生产线RFID的应用案例;说明了生产线物料监控系统的总体软、硬件架构体系;最后介绍了RFID智能操作终端。     

基于RFID的生产线物料监控系统的设计与应用

介绍了近年兴起的射频识别（RFID）技术的特点,并给出了一个实际加工生产线RFID的应用案例;说明了生产线物料监控系统的总体软、硬件架构体系;最后介绍了RFID智能操作终端。     

RFID产品识别及信息处理在汽车离合器装配生产线中的应用

汽车离合器生产装配过程中,每道工序的装配结果及每项测试信息对产品质量控制都非常重要。经过对射频识别RFID的功能、特征及应用研究,将RFID技术应用到汽车离合器装配生产线中,实现了在生产过程中进行数据的采集、存储、交互。同时,又可以对离合器产品型号进行识别,装配到哪一步工序进行识别和自动记录,从而实现汽车离合器产品防错和装配工序防漏。为汽车离合器装配生产线的数据传输形式提供了解决方案,生产线的自动化程度得到很大提高。     

Enabling ubiquitous sensing with RFID

Radio frequency identification has attracted considerable press attention in recent years, and for good reasons: RFID not only replaces traditional barcode technology, it also provides additional features and removes boundaries that limited the use of previous alternatives. Printed bar codes are typically read by a laser-based optical scanner that requires a direct line-of-sight to detect and extract information. With RFID, however, a scanner can read the encoded information even when the tag is concealed for either aesthetic or security reasons. In the future, RFID tags will likely be used as environmental sensors on an unprecedented scale.     

RFID-enabled automation in support of factory integration

In recognition of the need for more effective and efficient factory system integration solutions, this paper improves the method proposed in our previous work, focusing on new mechanisms to bridge the gap between shop floor automation and factory information systems. As one of the mainstream identification technologies, radio frequency identification (RFID) technology makes possible all products uniquely identifiable across factories. By taking advantage of data capacity stored in an RFID tag, critical manufacturing information on a product can be locally stored with the product. RFID technology provides a means for a product to rapidly retrieve its needed information as it advances through shop floors. A corresponding framework to enable the instant delivery of pertinent data and information on a uniquely identifiable job/product at point-of-need across factories is proposed. A small-scale manufacturing application is presented to show how the proposed approach can be implemented on the shop floor.     

基于MSP430的无源RFID考勤系统

随着信息技术的发展,智能化的考勤系统已经成为现代化企业架构的必备设施.设计了一种基于MSP430单片机和TRF7960射频芯片的读卡器,实现了对支持ISO14443A协议无源电子标签的查询和防碰撞算法,读卡距离约8cm,最多允许2张卡片同时读卡.读卡器具有性能稳定、功耗低等特点,结合服务器端系统中间件和Web应用软件的开发,实现了一套考勤系统的完整解决方案.     

一种基于物联网的多天线RFID纱锭定位系统

针对纺纱厂需要对大量纱锭筒管的位置信息采集的需求,在纱厂引入RFID技术。典型的RFID阅读器只有一根天线,一次只能读一个电子标签。为了实现一个RFID阅读器一个工作周期能够读取多个电子标签,设计了一种多天线RFID阅读器。描述了此种多天线RFID阅读器的硬件组成与软件构成,同时对多天线RFID阅读器的线圈数目、阅读距离与切换时间之间的关系进行了探索。为解决RFID系统对数据传输的需求,根据中间件思想构建了基于Web Services技术的接口,介绍了其具体实现的模型,为企业内部间、不同企业之间的信息提供了一个松耦合的系统集成方案。     

RFID移动容迟传感网

RFID移动容迟传感网利用射频识别与认证技术对目标对象进行标记,从而便于扫描和读取,然后通过无线传感网协同地感知、采集和处理监测区域中被监测对象的信息.通过将这RFID和无线传感网这两种技术有效组合、优势互补将极大拓宽它们的应用领域.     

Gesture recognition using RFID technology

We propose a gesture recognition technique based on RFID: cheap and unintrusive passive RFID tags can be easily attached to or interweaved into user clothes, which are then read by RFID antennas. These readings can be used to recognize hand gestures, which enable interaction with applications in an RFID-enabled environment. For instance, it allows people to interact with large displays in public collaboration spaces without the need to carry a dedicated device. We propose the use of multiple hypothesis tracking and the use of subtag count information to track the motion patterns of passive RFID tags. To the best of our knowledge, this work is the first on motion pattern tracking using passive RFID tags. Despite the reading uncertainties inherent in passive RFID technology, our experiments show that the proposed gesture recognition technique has an accuracy of up to 93%.     

The impact of false-negative reads on the performance of RFID-based shelf inventory control policies

Effective retail in-store logistics are paramount to provide high product availability at minimal operating costs. Despite various efforts by retailers to lower out-of-stock rates on retail shelves, product availability remains insufficient thereby significantly degrading a store's performance. Currently, retailers consider the introduction of Radio Frequency Identification (RFID) to improve the efficiency of replenishment processes in stores. However, the possibilities of RFID are ultimately limited by the physical characteristics of RF communications. Tag detuning and the absorption of radio waves by the tag's environment may lead to so-called ‘false-negative' reads, i.e., RFID tags in range being undetected by the reader device. Retailers ignoring the impact of false-negatives on the performance of RFID-based inventory control systems run the risk of overestimating the benefits to be expected from RFID. We develop an inventory control policy based on shelf stock information generated by RFID, which specifically accounts for inaccuracies associated with false-negative reads. The mathematical model is optimized for operating costs and compared to a basic periodic review strategy in a numerical study. The results indicate that the impact of false-negatives on cost remains modest for medium to high read rates. However, the system performance is sensitive to a number of exogenous parameters that must be considered when evaluating the practical use of RFID.     

珍贵书籍智能检索管理系统

为了实现珍贵图书的智能检索与管理,提出了一个基于无线射频识别技术(RFID)的解决方案。无线识别技术是通过非接触的方式,有效得读取标签相关信息的一个技术。其拥有体积小,识别距离远,安全性高,信息量大等特点。本文针对智能图书检索管理,设计了RFID读写器,能够高效读取图书中所贴标签的信息,并且能够快速检索计算机内相关数据的信息。同时,在此给出了射频识别系统读写器的软硬件设计与流程以及计算机中界面设计与数据库之间的程序设计流程。     

Privacy debate centers on radio frequency identification

The emergence of radio frequency identification (RFID) has brought with it a plethora of privacy concerns and experts are questioning whether the hoopla surrounding RFID is justified. Using RFID should trigger the same privacy concerns as other commonly used technology such as credit cards, cell phones, and the Internet. RFID's potential to revolutionize the retail industry by maximizing suppliers' ability to control inventory and reduce theft is widely recognized. In fact, some technology forecasters predict that RFID tags will eventually replace bar codes on almost all product packaging. The privacy debate centers around RFID tags themselves, which function like tiny radios, wirelessly transmitting information to network receivers. If RFID tags were to remain active even after consumers complete their purchases and exit stores, their wireless technology would let the stores track consumers' movement and behavior; or so goes the argument.     

物联网技术之RFID识别

RFID是目前应用于物联网的一项新兴通信技术,可通过无线电信号识别产品电子标签内的EPC码来识别特定目标,而无需识别系统与特定目标之间建立机械或光学接触,它的应用给物联网行业带来了革命性的变化,极大地节省了管理成本,提高了管理效率。文章重点对RFID的工作原理、安全性、现状及发展趋势进行了阐述。