Search results for "RFID"

RFID Chemical Sensor: Toward the RFID Lab-on-tag

2014

Wireless Battery-free Sensors: IC-Based and SAW-Based Sensing Technology

2014

Constrained-Design of Passive UHF RFID Sensor Antennas

2013

Passive UHF RFID tags may be used, beside labeling, to remotely observe the physical/chemical change of the tagged object, through modulation of their impedance and gain, thus acting as sensor antennas. The design of this new class of devices can be mastered by fully understanding the relationship between communication and sensing with the purpose to balance the maximization of the dynamic range of the response with the stability of the read distance. A new kind of communication/sensing nomogram permits to display both behaviors in a unitary way and to predict their physical limits, as well as to formalize a multi-parameter general-purpose optimization methodology. The procedure is demonstr…

Optimization of multichip RFID tag antenna with genetic algorithm and method of moments

2013

A specific procedure is implemented for the optimization of passive part of multichip RFID tag antenna, based on the performance parameter in terms of newly developed concepts. Examples are given and significant improvements have been observed comparing with previous results, which verifies the approach.

Experimental characterization of the RFID STENTag for passive vascular monitoring

2012

The possibility to monitor biological process in evolution and in particular the state of implanted devices such as vascular stent, has been recently proposed as one of the most challenging and fascinating application of the RFID passive technology. However, several issues are still in question and need to be analyzed in order to evaluate the real medical and sensing effectiveness of the proposed implantable radio sensor. The aim of this work is to experimentally evaluate the robustness of the RFID platform, its accuracy and its reproducibility as well as the effectiveness of the proposed sensing approach in term of human variability and pathology evolution.

NIGHT-Care: A Passive RFID System for Remote Monitoring and Control of Overnight Living Environment

2014

AbstractAn Ambient Intelligence platform, NIGHTCare, for remote monitoring and control of overnight living environment is here proposed. The platform, entirely based on RFID passive technology is able to recognize nocturnal behaviors and activities, generates automatic alarms in case of anomalous or pathological events and support diagnostics. The results of a complete test in real scenario are presented, together with a numerical assessment of electromagnetic safety issues.

Elektroniskās darba laika uzskaites sistēma, izmantojot NFC lasītājus un kontrolierus

2018

Atbilstoši likuma grozījumiem likumā “Par nodokļiem un nodevām” nepieciešams izstrādāt elektronisko darba laika uzskaites sistēmu kura izpilda visas likuma grozījumā minētās prasības. Likuma grozījumi paredz, ka jebkurā būvobjektā, kura kopējā pasūtījuma summa pārsniedz 1 miljonu eiro, Elektroniskās darba laika uzskaites sistēma ir obligāta prasība, pretējā gadījumā valsts ieņēmumu dienests uzņēmumam piemēro naudas sodu. Bakalaura darba teorētiskās daļas ietvaros tika izpētītas dažādas RFID tehnoloģijas, kā arī precīzāk apskatīta NFC tehnoloģija, kura ir izmantota būvobjekta datu savākšanas kastes izstrādāšanā, kā arī izstrādāts risinājums Android viedtālruņiem, kura pamatā tiek izmantos NF…

Kyberturvallisuus esineiden internetissä yksilön näkökulmasta

2016

Tämä tutkielma käsittelee esineiden internetiä, kyberturvallisuutta, sekä miten nämä kaksi toimivat yhdessä. Tutkimuskysymyksinä ovat millaisia kybertur-vallisuusriskejä yksilö voi kohdata esineiden internetin palveluissa, sekä miten näiltä riskeiltä voitaisiin suojautua. Esineiden internet on verkko, joka yhdistää miljoonia laitteita yhteen ja antaa niille mahdollisuuden kommunikoida kes-kenään. Sen tarkoitus on tehdä langattomista ja automatisoiduista toiminnoista arkipäivää ja laajamittaista, ulottuen kodin laitteista terveydenhuoltoon ja jopa elintarvikkeisiin. Ennen kuin esineiden internetin palvelut ja laitteet voivat saavuttaa laajamittaisen ja kokonaisvaltaisen tilan, on ratkaistava…

Human body sensing: A pervasive approach by implanted RFID tags

2011

Starting from the physical evidence that passive RFID systems may be used as self-sensing devices, the feasibility of human monitoring by means of implanted tags is here investigated. The key parameters to master with the purpose to enhance the sensitivity of the implanted radiosensor have been theoretically analyzed and numerically applied to a specific medical problem, i.e. the continuous monitoring of liver cancer evolution. Preliminary experimental results with simplified phantoms corroborate the analysis.

Passive UHF RFID antennas for sensing applications: Principles, methods, and classifcations

2013

UHF passive radio-frequency identification technology is rapidly evolving from simple labeling of things to wireless pervasive sensing. A remarkable number of scientific papers demonstrate that objects in principle can have their physical properties be remotely tracked and monitored all along their life cycle. The key background is a new paradigm of antenna design that merges together the conventional communication issues with more-specific requirements about sensitivity to time-varying boundary conditions. This paper presents a unified review of the state of the art of the tag-as-sensor problem. Particular care is taken to formalize the measurement indicators and the communication and sens…