Search results for "Sensor"
showing 10 items of 4594 documents
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…
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.
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…
Internet of Things – Emergence of standards
2012
Poikolainen, Janne Internet of Things – Emergence of standards Jyväskylä: University of Jyväskylä, 2012, 34 p. Information System Science, Bachelor's Thesis Supervisor: Mazhelis, Oleksiy Internet of Things is a paradigm referring to the pervasive presence of networked things and objects that are able to interact and cooperate with each other. This paradigm also suggests that in the future these objects also produce large amounts of data to the internet and other network applications. Predictions say that the amount of data produced by things proceeds human produced data in the near future. These visions are grounded in the assumption that the advances in microelectronics, communications and…
Pervasive body sensing: Implanted RFID tags for vascular monitoring
2010
Beside the common logistic usages of the Radio Frequency Identification (RFID) technology, one of the most innovative and promising applications is the possibility to process the backscattering signals to detect additional information about the target, such as its state and its evolution, without any specific embedded sensor or local power supply. The rationale of this idea lies in the clear dependence of the tag's input impedance and reflectivity on the physical and geometrical features of a real target. When the object where the tag is attached on undergoes some changes along with the time, the tag's electrical features also change and these variations can be remotely detected by the read…
La progettazione di interventi per una mobilità sostenibile in ambito urbano
2014
Lo scopo di questo studio è stato quello di proporre un modo diverso di intendere le ZTL (Zone a Traffico Limitato), sia dal punto di vista della loro pianificazione sia dal punto di vista tecnologico e gestionale. Si intende puntare a risultati concreti e innovativi, ricercando strumenti, processi e soluzioni per il miglioramento della pianificazione, organizzazione e gestione delle ZTL. In particolare, si affronta il tema del road pricing e del parking pricing e di come questi strumenti si possono integrare all’interno del sistema trasportistico già esistente. A fronte di questi temi si vuole proporre un modello di pricing innovativo, sia dal punto di vista tecnologico sia metodologico, c…
Esineiden internetin hyödyt yksilölle turvallisuuden näkökulmasta
2017
Tässä tutkielmassa esitellään esineiden internetin hyötyjä yksilölle turvallisuuden näkökulmasta. Aihe on tärkeä, sillä esineiden internet on nopeasti ja jatkuvalla tahdilla kasvava ilmiö, joka tulee väistämättä vaikuttamaan huomattavasti nykyiseen ja tulevaan yhteiskuntaan. Kehittyvien teknologioiden ansiosta lähitulevaisuudessa lähes jokainen esine voidaan yhdistää internetiin, mikä mahdollistaa valtavan potentiaalin esineiden internetin hyödyntämiselle. Tutkielmassa keskitytään esineiden internetin mahdollistamiin yksilön turvallisuushyötyihin. Tutkimuskysymyksenä on mitä eri turvallisuushyötyjä yksilö saa esineiden internetistä ja miten ne parantavat yksilön turvallisuutta. Tutkielmassa…