L. Cocco, P.Gazzola, S.Rapuano, L. Rossi
F1 car is a very critical system in terms of temperature, shock and vibrations. For this reason, usually, automotive standards are no adequate for motor-sport electronic applications. Further peculiarity of F1 automobiles is the periodic change of vehicle dynamic setting. Vibration monitoring techniques are being used by F1 teams mainly to spot mechanical imbalances and, consequently, to define a car’s set up. In the competitive race context, also it is mandatory to improve the electronic components reliability, to optimize their maintenance time, to control the quality of their...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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Luca De Vito, Sergio Rapuano, Maurizio Villanacci
This paper presents an instrument for the automatic classification of the common impairments on Quadrature Amplitude Modulation (QAM) signals. The instrument is intended to help telecommunication service providers to guarantee Quality of Service (QoS) to their customers. Starting from an already developed method based on the processing of the constellation diagram image, the paper presents both significant improvements in the method and the realization of a prototype of impairment classifier, based on a multi-DSP hardware architecture. Experimental results of the validation phase of the...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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Pier Andrea Traverso, Gaetano Pasini, Antonio Raffo, Domenico Mirri
The behaviour of both stand-alone ADCs and entire A/D acquisition channels under time-varying input excitations exhibits non-idealities which are peculiar to the dynamic operation and can not be described by the characteristics of the static response. In addition, even the common dynamic parameters suggested by the current standards usually fail to separately qualify the purely-dynamic non-linearities from all other perturbation effects on the system response. In this paper, the features of the Discrete-Time Convolution Model are discussed by pointing out the properties of the general...
Carlo Michelassi, Giacomo Monaci
Driven by the needs of highly competitive markets, the performance requirements of today’s production systems are becoming increasingly demanding. High availability is one of the key requirements for new machines and industrial plants. The objective of the present study is the assessment of the availability of a Gas Re-injection Plant used for the production of oil and gas in the Kashagan field (Kazakhstan). In order to assess the availability performance of this complex system, a broad set of studies has been carried out to gather accurate information at the level of detail considered...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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S. Nuccio, C. Spataro, G. Tinè
In previous works, we analysed the behaviour of data acquisition board based measurement instruments when they are subjected to the electromagnetic disturbances prescribed in the IEC-61326 Standard. The study has shown that the effects of both radiated and conducted emissions alter the performances of this instrumentation when not-shielded configurations are used; in fact, in these cases, the parameters which characterise a data acquisition board can reveal an appreciable degradation. On the contrary, even the heaviest disturbances cause a negligible impact if the good practices of shielding...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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S. Nuccio, C. Spataro
Choosing the right analog-to-digital converter for a stated measurement application and for a stated target uncertainty is not an easy task. In fact, each time the prospective purchaser browses among the manufacturer specifications, he finds different sets of parameters which qualify the product; moreover, the same figure of merit is often defined and measured in ambiguous way. One of the main reasons which has caused this situation is the coexistent of various Standards concerning the characterization of the analog-to-digital converters. The choice of the converter becomes more difficult...
Drago Cmuk, Tarik Mutapcic, Mladen Borsic
Practical work in the laboratory using real instruments is a strong emphasis for theoretical knowledge but also a powerful drawback for distance learning in universities. The paper describes development of a remote laboratory for mobile devices. Given the detailed analysis of potential benefits coming from the deployment of such a system, the author analyzed the technologies suitable for its realization. Multi-tier platform has been developed to support Mobile learning and experimentation. For visualization and control of experiments a thin-client paradigm based on DHTML has been developed....
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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Doris Bao, Luca De Vito, Sergio Rapuano
The paper proposes a metrological analysis for selecting the test signals to be used with a method for the automatic classification of impairments in VoIP telecommunication systems. The method is able to identify the VoIP network impairments which decrease voice quality, by analyzing the power of a test signal during the call. Test signals, considered in this work, comprise speech-like signals, non- speech-like deterministic signals and non- speech-like stochastic signals, taken either from standard specifications or from literature papers on voice quality assessment. In order to evaluate...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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Marek Niedostatkiewicz, Grzegorz Lentka
The electrical modelling of technical and biological objects has become very popular, as it allows diagnosis of their state with tools and methods designed for electrical circuits. To identify equivalent circuit parameters, usually conventional impedance spectroscopy methods are used, despite their drawbacks – long measurement time and high numerical complexity. An alternative identification method is based on the bilinear transformation of impedance function. Not only it accelerates the measurement, but also it simplifies the calculations, as the relations between measured impedance and...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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M. Ceccarelli, D. Grimaldi, F. Lamonaca, A. Speranza
This paper reports a novel method for Nucleus and Micro Nucleuses segmentation. These biological structures are very handy to biologists for relieving structural chromosome aberration. The adopted method consists into a pipeline of advanced computer vision algorithms same of them specifically tailored for the current segmentation problem. Starting from the knowledge of approximate size and shape of Micro Nucleuses it is possible to efficiently segment all the image features by computer vision approach.
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
· Download