Pasquale Arpaia, Fabrizio Clemente, Mario Rapone, Carmine Romanucci
A research project on the measurement of emission factors in critical driving conditions arising from a cooperation among University of Sannio, Istituto Motori of CNR, and some companies of Italian Regione Campania is started. In particular, in this paper, a procedure of automatic feature extraction and data classification of vehicle driving sequences by means of Wavelet analysis and Cultural Algorithms is proposed. The procedure improves the lack of sensitivity of the state-of-the-art statistical methods to variations of vehicles instantaneous kinematic parameters (e.g. speed, acceleration)...
XVIII IMEKO World Congress
· TC4
· 2006
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Jan Hlavácek, Karel Draxler, Radek Procházka
This paper deals with composite error determination of current transformers (CT) for purpose of nonharmonic periodic current measurements. The experiment was performed for typical nonharmonic periodic waveforms that occur in power grids with frequency 50 Hz. The area of measurements was extended also for higher fundamental frequency values.
XVIII IMEKO World Congress
· TC4
· 2006
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Sergey V. Muravyov, Valery N. Borikov, Stanislav A. Kaysanov
This paper presents both hardware and software of system for measurement of welding process electric parameters. The distinctive feature of the system is its application for control of the process of high-quality contact micro-welding of critical destination products which is characterized by the pulse current in the range from 100 A to 20kA and by the pulse duration from a few to hundreds of milliseconds. The system is portable and consists of the measuring coaxial shunt, oscillograph and computer with a software. Structure and main principles of constructing the system components are...
XVIII IMEKO World Congress
· TC4
· 2006
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Celso Fabricio de Melo, Ricardo Luiz Araújo, Leonardo Morozowski Ardjomand Nilton S. Ramos Quoirin, Minoru Ikeda, Alexandre Albarello Costa
This paper describes the construction of a Helmholtz coil to be used as a magnetic field generator during the calibration of magnetic field sensors. A magnetic field meter was calibrated using the coil to test its efficiency. The obtained results were then compared to the meter’s calibration sheet.
XVIII IMEKO World Congress
· TC4
· 2006
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Pietro Vincenzo Barbaro, Antonio Cataliotti, Valentina Cosentino, Salvatore Nuccio
The reactive energy meters used in electric distribution networks are based on a conventional definition of reactive energy (or power) for sinusoidal voltages and currents, containing only the fundamental frequency component. As a consequence, the performances of reactive energy meters in the presence of harmonic distortion are not tested and their accuracy specifications can be very different from the nominal ones, that are evaluated in sinusoidal conditions. In this paper the authors present a comparative study of the performances of different reactive energy meters, both electromechanical...
XVIII IMEKO World Congress
· TC4
· 2006
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Nico Deblauwe, Valentin Enescu, Leo Van Biesen
This paper presents a mobile measurement setup, VUBmeas , which is based on open source software and commercially available mobile phones. The system design, both from a hardware and software point of view and the possibilities will be looked at. Two examples of applications are given to show its broad usability: one more in the field of positioning, the original field of research it was developed for.
XVIII IMEKO World Congress
· TC4
· 2006
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Jerzy Nabielec, Jacek Nalepa
The paper presents the application of a differential algorithm for the “blind correction” method with respect to measuring systems where both: the measured signal and parameters of the measuring channels are varying with the same fundamental frequency. The influence of the measuring channels’ parameters on the effectiveness of correction was investigated for the polyharmonic case, using the simulation methods.
XVIII IMEKO World Congress
· TC4
· 2006
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Stanislaw Moskowicz
In the proposed design of a ring-core sensor, three windings, namely the exciting, the sensing and the compensating ones are applied directly on a special ringcore. The core is also wrapped with an additional winding that controls the so-called virtual air-gap. The virtual air-gap enables the sensor sensitivity to be adjusted in wide range. In the paper the design and test results of the proposed sensor are presented.
XVIII IMEKO World Congress
· TC4
· 2006
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V. Pop, P.P.L. Regtien, H.J. Bergveld, P.H.L. Notten, J.H.G. Op het Veld
Lithium-ion (Li-ion) is the most commonly used battery chemistry in portable applications nowadays. Accurate State-of-Charge (SoC) and remaining run-time (tr) calculation for portable devices is important for the user convenience and to prolong the lifetime of batteries. A new SoC algorithm for Li-ion batteries that combines adaptivity with direct measurement and book-keeping systems has been developed and implemented in a real-time evaluation system. In this paper the error sources in the real-time SoC evaluation system with possible calibration solutions are described. The goal of the SoC...
XVIII IMEKO World Congress
· TC4
· 2006
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Branislav Skladan, Peter Fuchs
The developed calibration software for the automated calibration process of digital sampling electricity meters is described. In present, two types of electricity meters, PEM 6711 (Precise Electricity Meter) and single phase electricity meter based on mixed-signal processor TI MSP430FE427 can undergo a fully automated calibration process. Calibration laboratory with the electronic calibration station EKS 05-3, used to calibrate electricity meters, is also described and its function is explained.
XVIII IMEKO World Congress
· TC4
· 2006
· Download