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B. D’Apice, C.Landi, A.Pelvio, N.Rignano
A Multi-DSP Based instrument for Real-Time Energy and PQ Measurements

The evaluation of electrical energy flows is at the base of all operations connected to the commercial transactions in energy market. Typically, the measurement apparatuses are made and characterized to work in ideal sinusoidal conditions. But, with increasing diffusion of power electronic devices, the typical characteristics of power network are far from sinusoidal ones. With the aim to link the cost of energy to the level of power quality, it is necessary to determine the energy but also the indexes which characterize the power quality. In this paper the design and implementation of a multi processor measuring instrument based on multiple digital signal processors (DSPs) is discussed. This system can embody a number of special signal processor and analog I/O modules, specifically designed to obtain the flexibility and scalability to meet the needs of real-time measurement applications and low cost. After a prototype description, a part of analysis algorithm is reported. The paper is completed by preliminary results of metrological characterization.

R. Ciobanu, S. Hanganu, S. Aradoaei
Evaluation of cable paper performance, by use of space charge measurements

Focused on the analysis of space charge evolution in papers for DC cables insulation, the article tries to identify some parameters derived from PEA measurements, able to characterize accurately the space-charge associated phenomena under certain poling conditions, in order to be further correlated with charge mobility and, eventually, with the physical/chemical structure consequent to the manufacturing process of the insulating material.

Leopoldo Angrisani, Aniello Napolitano, Michele Vadursi
Capacity Measurement in Communication Networks

The capacity of the communication network is a key metric for both network planning and management, and performance assessment of applications that take advantage of the network. Several tools for capacity measurement are present in literature, which provide satisfying results when used in wired networks. On the contrary, they provide inaccurate results on wireless networks. The paper presents a refined study of processing times at each protocol layer, which suggests that capacity estimates provided by the existing tools are affected by a systematic error. A suitable measurement methodology and a related testbed are proposed to experimentally validate the theoretical results. The experimental outcomes demonstrate the validity of the study, and permit to explain why existing tools are inaccurate on wireless links.

Leopoldo Angrisani, Luigi Battaglia, Aniello Napolitano, Rosario Schiano Lo Moriello
Web Portal for Measurement Applications based on GRID Services

The paper presents a Web Portal for measurement application based on GRID Service as an innovative solution to provide researchers with a “collection” of measurement algorithms characterized by huge computational burden. In its current version, the portal allows the execution of two different algorithms (i.e. estimation of spectral density power and instantaneous frequency). Other functionalities will successively be added to the portal, thus offering the opportunity of providing a complete set of algorithms and method for measurement signal processing.

Pasquale Arpaia, Giovanni Meccariello, Mario Rapone, Antonio Zanesco
Quantum-Inspired Evolutionary Classification of Driving Sequences in Vehicle Emission Factor Measurement

A heuristic procedure of classification, the quantum-inspired classifier (QIC), exploiting search space exploration and resource exploitation of quantum computing on a software basis is proposed. The application to the problem of speed sequence classification for vehicle emission factor determination based on drive styles is shown. Experimental results are discussed by showing the QIC capability of converging better and faster than classical evolutionary algorithms.

Cristian-Gyozo Haba, Liviu Breniuc, Valeriu David
e-Learning System for Temperature and Humidity Sensors and Distributed Measurement

In our paper we present an e-learning system that students can use for learning different topics related to temperature and humidity sensors. The system consists of three different temperature sensors and a temperature/humidity sensor, all controlled with the aid of a development board based on the PICmicro 18F452 microcontroller. Students can have access to the system over the Internet using a set of web based interfaces to the sensors. Using this system student can learn: the use of integrated temperature sensors, software implementation of different communication protocols (I²C, 1-wire, CMOSens), distributed measurement systems based on these sensors, microcontroller based instrumentation, data logging and web control of measurement systems.

Codrin Donciu, Marinel Temneanu, Alina Samoila
New Prototype Architecture for Vision Automated Inspection

the project proposes to accomplish a new system architecture of real-time video inspection of textile materials, which should ensure a fault tracking-down, rate of over 99%, in the presence of disturbing elements from the industrial environment. The inspection procedure stipulates that the system should learn the correct model of the textile material, so that it is able to notice the deviations that might appear during its inspection. The model changes are analyzed with the help of many detection algorithms to separate real flaws from normal variations, accepted in the material. After the detection, follows the localization of the flaw, settling the coordinates, its size and recording it in the flaw library. This is a work-in-progress that has to be finished in august 2008.

Dorin Lucache, Alecsandru Simion, Leonard Livadaru
Method to determine the internal angle of a synchronous machine for establishment of the experimental torque-angle characteristic

The paper describes the experimental determination of the internal angle of a permanent- magnet synchronous electrical machine with axial air gap, using the results of the usual measurements of voltages, currents and torque in transient load operation. The particular propriety of the used test- bench is pointed out, as well the necessary improvements to reduce the method limitations.

M. Felizardo, R.C. Martins, T.A. Girard
Spatial identification of nucleations in Superheated Droplet Detectors

We present a new method for the identification of bubble nucleation in superheated droplet detectors. This is accomplished through some elaborate signal processing techniques applied to the acoustical recording of the nucleation events. These include the application of wavelets, chirp-z transform and pulse shape identification procedures to locate temporally and validate the nucleation together with back-propagation algorithms for spatial localization. Experimental results are given for the spatial localization at different temperatures and pressures.

Leopoldo Angrisani, Mauro D’Arco, Annalisa Liccardo, Rosario Schiano Lo Moriello
An innovative low-cost device for electricity metering services

The paper presents a prototype of cost-effective device mandated to identify, classify and measuring typical disturbances characterizing the quality of power supply systems. In particular, variations from the nominal root-mean-square value of the voltage signal, referred to as sag, interruption and swell, are taken into account. Moreover, specific functionalities implemented on the prototype offer the possibility of measuring the apparent and active absorbed by a connected load, as well as verifying voltage spectral purity by mean of the evaluation of a traditional total harmonic distortion index.

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