4,376 research outputs found

    On Improving Automation by Integrating RFID in the Traceability Management of the Agri-Food Sector

    Get PDF
    Traceability is a key factor for the agri-food sector. RFID technology, widely adopted for supply chain management, can be used effectively for the traceability management. In this paper, a framework for the evaluation of a traceability system for the agri-food industry is presented and the automation level in an RFID-based traceability system is analyzed and compared with respect to traditional ones. Internal and external traceability are both considered and formalized, in order to classify different environments, according to their automation level. Traceability systems used in a sample sector are experimentally analyzed, showing that by using RFID technology, agri-food enterprises increase their automation level and also their efficiency, in a sustainable wa

    Feasibility Study of RFID Technology for Construction Load Tracking

    Get PDF
    INE/AUTC 10.0

    Benefits of connecting rfid and lean principles in health care

    Get PDF
    The performance management process in health care is far behind compared to the manufacturing and service industries. Although nowadays the health care organizations are able to deal with a greater rank diseases, their cost, quality and delivery has essentially not improved significantly, and the difference with the other industries even seems to have increased. As opposed to this situation health care has a tremendous opportunity to deploy lean principles to reduce internal/external costs, improve patient safety, increase profits, reduce litigation and decrease the dependence on Government and Insurance. The application of these principles is being facilitated by the use of the new technologies. A new technology allowing personnel to constantly "see" what's happening with regards to patients schedule, backlog, workflow, inventory levels, resource utilization, quality, etc., is Radio Frequency Identification (RFID). The aim of this paper is to analyse the benefits that can be derived from the joint use of lean principles and RFID technology in health care

    Wisent: Robust Downstream Communication and Storage for Computational RFIDs

    Full text link
    Computational RFID (CRFID) devices are emerging platforms that can enable perennial computation and sensing by eliminating the need for batteries. Although much research has been devoted to improving upstream (CRFID to RFID reader) communication rates, the opposite direction has so far been neglected, presumably due to the difficulty of guaranteeing fast and error-free transfer amidst frequent power interruptions of CRFID. With growing interest in the market where CRFIDs are forever-embedded in many structures, it is necessary for this void to be filled. Therefore, we propose Wisent-a robust downstream communication protocol for CRFIDs that operates on top of the legacy UHF RFID communication protocol: EPC C1G2. The novelty of Wisent is its ability to adaptively change the frame length sent by the reader, based on the length throttling mechanism, to minimize the transfer times at varying channel conditions. We present an implementation of Wisent for the WISP 5 and an off-the-shelf RFID reader. Our experiments show that Wisent allows transfer up to 16 times faster than a baseline, non-adaptive shortest frame case, i.e. single word length, at sub-meter distance. As a case study, we show how Wisent enables wireless CRFID reprogramming, demonstrating the world's first wirelessly reprogrammable (software defined) CRFID.Comment: Accepted for Publication to IEEE INFOCOM 201

    BENEFITS OF CONNECTING RFID AND LEAN PRINCIPLES IN HEALTH CARE

    Get PDF
    The performance management process in health care is far behind compared to the manufacturing and service industries. Although nowadays the health care organizations are able to deal with a greater rank diseases, their cost, quality and delivery has essentially not improved significantly, and the difference with the other industries even seems to have increased. As opposed to this situation health care has a tremendous opportunity to deploy lean principles to reduce internal/external costs, improve patient safety, increase profits, reduce litigation and decrease the dependence on Government and Insurance. The application of these principles is being facilitated by the use of the new technologies. A new technology allowing personnel to constantly "see" what’s happening with regards to patients schedule, backlog, workflow, inventory levels, resource utilization, quality, etc., is Radio Frequency Identification (RFID). The aim of this paper is to analyse the benefits that can be derived from the joint use of lean principles and RFID technology in health care.

    Spatial Identification Methods and Systems for RFID Tags

    Get PDF
    DisertačnĂ­ prĂĄce je zaměƙena na metody a systĂ©my pro měƙenĂ­ vzdĂĄlenosti a lokalizaci RFID tagĆŻ pracujĂ­cĂ­ch v pĂĄsmu UHF. Úvod je věnovĂĄn popisu současnĂ©ho stavu vědeckĂ©ho poznĂĄnĂ­ v oblasti RFID prostorovĂ© identifikace a stručnĂ©mu shrnutĂ­ problematiky modelovĂĄnĂ­ a nĂĄvrhu prototypĆŻ těchto systĂ©mĆŻ. Po specifikaci cĂ­lĆŻ disertace pokračuje prĂĄce popisem teorie modelovĂĄnĂ­ degenerovanĂ©ho kanĂĄlu pro RFID komunikaci. Detailně jsou rozebrĂĄny metody měƙenĂ­ vzdĂĄlenosti a odhadu směru pƙíchodu signĂĄlu zaloĆŸenĂ© na zpracovĂĄnĂ­ fĂĄzovĂ© informace. Pro Ășčely lokalizace je navrĆŸeno několik scĂ©náƙƯ rozmĂ­stěnĂ­ antĂ©n. Modely degenerovanĂ©ho kanĂĄlu jsou simulovĂĄny v systĂ©mu MATLAB. VĂœznamnĂĄ část tĂ©to prĂĄce je věnovĂĄna konceptu softwarově definovanĂ©ho rĂĄdia (SDR) a specifikĆŻm jeho adaptace na UHF RFID, kterĂĄ vyuĆŸitĂ­ bÄ›ĆŸnĂœch SDR systĂ©mĆŻ značně omezujĂ­. DiskutovĂĄna je zejmĂ©na problematika prĆŻniku nosnĂ© vysĂ­lače do pƙijĂ­macĂ­ cesty a poĆŸadavky na signĂĄl lokĂĄlnĂ­ho oscilĂĄtoru pouĆŸĂ­vanĂœ pro směơovĂĄnĂ­. PrezentovĂĄny jsou tƙi vyvinutĂ© prototypy: experimentĂĄlnĂ­ dotazovač EXIN-1, měƙicĂ­ systĂ©m zaloĆŸenĂœ na platformě Ettus USRP a antĂ©nnĂ­ pƙepĂ­nacĂ­ matice pro emulaci SIMO systĂ©mu. ZĂĄvěrečnĂĄ část je zaměƙena na testovĂĄnĂ­ a zhodnocenĂ­ popisovanĂœch lokalizačnĂ­ch technik, zaloĆŸenĂœch na měƙenĂ­ komplexnĂ­ pƙenosovĂ© funkce RFID kanĂĄlu. Popisuje ĂșzkopĂĄsmovĂ©/ĆĄirokopĂĄsmovĂ© měƙenĂ­ vzdĂĄlenosti a metody odhadu směru signĂĄlu. Oba navrĆŸenĂ© scĂ©náƙe rozmĂ­stěnĂ­ antĂ©n jsou v zĂĄvěru ověƙeny lokalizačnĂ­m měƙenĂ­m v reĂĄlnĂœch podmĂ­nkĂĄch.The doctoral thesis is focused on methods and systems for ranging and localization of RFID tags operating in the UHF band. It begins with a description of the state of the art in the field of RFID positioning with short extension to the area of modeling and prototyping of such systems. After a brief specification of dissertation objectives, the thesis overviews the theory of degenerate channel modeling for RFID communication. Details are given about phase-based ranging and direction of arrival finding methods. Several antenna placement scenarios are proposed for localization purposes. The degenerate channel models are simulated in MATLAB. A significant part of the thesis is devoted to software defined radio (SDR) concept and its adaptation for UHF RFID operation, as it has its specialties which make the usage of standard SDR test equipment very disputable. Transmit carrier leakage into receiver path and requirements on local oscillator signals for mixing are discussed. The development of three experimental prototypes is also presented there: experimental interrogator EXIN-1, measurement system based on Ettus USRP platform, and antenna switching matrix for an emulation of SIMO system. The final part is focused on testing and evaluation of described positioning techniques based on complex backscatter channel transfer function measurement. Both narrowband/wideband ranging and direction of arrival methods are validated. Finally, both proposed antenna placement scenarios are evaluated with real-world measurements.

    A New RSSI-based Centroid Localization Algorithm by Use of Virtual Reference Tags

    Get PDF
    A good design of node location is critical for efficient and effective wireless communications. This paper presents an improved algorithm, in order to solve the low localization accuracy caused by traditional centroid algorithm. The improved algorithm combined with VIRE system and traditional centroid algorithm. The VIRE algorithm is introduced and the signal propagation model is utilized to construct virtual reference tags in the location area. Simulation shows that this further developed algorithm has further improved the accuracy of positioning up to 35.12% compared to the traditional centroid algorithm. It is concluded that this algorithm can further improve the locating accuracy in comparison with the original centroid algorithm
    • 

    corecore