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The authors answer two basic questions considered in the paper. Taking into account up-to-date progress in the electronic technology, is it possible to create an autonomous battery-free sensor with RFID interface, in which power energy is harvested from outer sources available in the application environment? And what would be the best technology for manufacturing the test circuit of designed sensor...
W artykule przedstawiono propozycję wykorzystania techniki obliczeń ewolucyjnych na potrzeby optymalizacji procesu alokacji i szeregowania zadań obliczeniowych w heterogenicznych systemach wieloprocesorowych. W pierwszej części artykułu zamieszczono wprowadzenie w problematykę szeregowania zadań w komputerowych systemach czasu rzeczywistego. W szczególności omówiono zasady leżące u podstaw funkcjonowania...
Gas-analyzing systems based on gas sensors, commonly referred to as electronic noses, are the systems which enable the recognition of volatile compounds in their working environment and provide the online results of analysis. The most commonly used type of sensors in such systems is semiconductor gas sensors. They are considered to be the most reliable in the long-term applications (more than 1 year),...
Bezpieczeństwo dzisiejszych systemów kryptograficznych jest ściśle związane z generacją pewnych nieprzewidywalnych wartości. Zastosowanie układu generatora kluczy w systemach radiolokacyjnych umożliwia realizację algorytmów kryptograficznych, zapewniających wysoki poziom bezpieczeństwa kryptograficznego. W artykule tym został przedstawiony układ generatora wartości losowych, bazującego na teorii nieliniowych...
The results of research conducting the determination of efficiency of energy harvesting from electromagnetic field generated by RFID reader antenna operating in UHF frequency band have been presented in this paper. In order to analyze distribution of electric field strength based on mathematic dependencies, calculation procedures have been elaborated in MathCad program. Established numerical procedures...
W artykule zaprezentowano projekt osobistego systemu do monitorowania mechaniki ruchów oraz rozkładu nacisku podeszwowej części stopy. Układ pozwala na rejestrację danych w warunkach rzeczywistych w czasie dynamicznych obciążeń, podczas chodu i biegu. W skład systemu wchodzi układ akwizycji oraz elastyczna wkładka sensoryczna. Głównymi elementami Układu akwizycji są mikrokontroler z rdzeniem ARM Cortex...
In the paper an experimental optimization of laser cutting process parameters was presented. In this experimental studies the DuPont Kapton and Mylar foils with a thickness of 125 μm were used. Materials were cut by a Laser Trotec Finemarker Hybrid Strong system with different process parameters, such as laser type, lens type, power, speed, frequency and correction. The elaborated set of cutting parameters...
The main aim of conducted research was determination of real-world parameters responsible for energetic properties of the selected inputoutput circuits in microprocessor systems with declared low power consumption and used in non-conventional applications as energy harvesting modules of RFID and telecommunication systems. In such critical conditions (as regards amount of energy for semi-passive RFID...
The paper focuses on design and fabrication of the automatic system for characterization of thermoelectric parameters of planar and multilayer structures, which can served as thermoelectric microgenerators. The generated thermoelectric force (output voltage), internal resistance as well as cold and hot junctions’ temperature are measured and further can be analyzed as a function of temperature and/or...
The Electronic Innovation Cluster was founded in 2011 as a result of the already existing economic relations between Center of Technological Electronics and Interconnection Techniques from the Politehnica University of Bucharest and several SMEs from the Bucharest-Ilfov region of Romania. Following the cluster concept of triple helix introduced by Prof. Michael Porter, ELINCLUS has now 48 members,...
The problems connected with generation of higher harmonics by supply circuits in compact lighting sources have been presented in this paper. The results of laboratory tests of the selected fluorescent lamps from three different manufacturers have been included. The measured light sources were supply by stable programmed NetWave source from EMTest. It allowed to characterize each fluorescent lamp taking...
In this paper we present the system for characterization the electromagnetic microgenerators fabricated in Low Temperature Co-fired Ceramics (LTCC) technology as well as fabrication and electrical properties of such microgenerators. Electromagnetic microgenerators include planar multilayer multipole coils, and a multipole permanent magnet. In our experiment the coils with 6, 8,10 and 12 layers and...
Despite a variety of antenna solutions that are used in the RFID technique, new designs are still developed along with the tremendous progress in the electronic material science. Due to low costs of production and small dimensions of final equipment, the microstrip antennas are frequently utilized for read/write devices that operate in the UHF band. The development of microstrip technology has been...
The description of comparative study realization of commercially available supercapacitors, which belong to the same series, has been presented in this paper. The fundamental parameters of a simple equivalent model have been pointed out and the dispersion of all family parameters has been defined. The theoretical principles of used method, the construction of test bench and methodology of carrying...
W artykule przedstawiono badania materiałów magnetycznych tj. αFe, Fe8N i Fe4N. W pracy zawarto wyniki badań dwóch serii. Pierwsza dotyczyła próbek o zawartości azotu niższej od maksymalnej rozpuszczalności, tj. N<0,1%wag., druga zaś obejmowała próbki o zawartości wyższej od maksymalnej rozpuszczalności, tj. N>0,1%wag.
A luminescent lamp was constructed and tested. Phosphor excited by electrons is the a source of light. The source of electrons is field emission cathode. The cathode is covered with nickel-carbon film containing carbon nanotubes that enhance electron emission from the cathode. Results of luminance measurements are presented. Luminance is high enough for lighting application of the lamp. Luminance...
In the paper there is presented an application designed to perform the simulation of dynamic RFID system. The application takes into account many aspects of operation of RFID system in dynamic conditions, i.e. when during of identification process tags move in relation to the reader. The algorithm of application is based strictly on numerical values of parameters given in the EPC Gen2 protocol. There...
In this paper the problem of ink spreading on various substrates was presented. The ink was dropped by the piezoelectric industrial SE-128 AA printhead using techniques typical for inkjet technology. For the investigation two various conductive inks were used. Materials were printed on various substrates by the PixDro LP 50 system. The investigation concerns physical properties of substrates and technological...
Actually many types of communication protocols are used in the multiple communication systems. Part of them works as specific solutions developed by producers. Rest evolves on the basis of acts, such as ISO18000 - “RFID for item management; Air interface”, ISO18000 - “Proximity integrated circuit card” and ISO15693 - “Identification cards; Contactless integrated circuit(s) cards; Vicinity cards”....
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