Maria Giovanna Durante, Luigi Di Sarno, Stefania Sica, George Mylonakis, Colin A. Taylor, Armando Lucio Simonelli
The geotechnical systems are often studied analysing the response of scaled models in 1-g or n-g devices. A crucial aspect in these kind of models is the capability to read the real response of the system using different instrumentations. In this paper are described the main devices used for the interpretation of the dynamic response of a scaled geotechnical model tested at the Bristol Laboratory for Advanced Dynamics Engineering (BLADE) of the University of Bristol, UK, within the framework of the Seismic Engineering Research Infrastructures for European Synergies (SERIES), funded by the...
TC4 Symposium 2014
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Ausilio Ernesto, Zimmaro Paolo
In the detection and monitoring of a landslide a large number of variables should be taken into account. Several techniques and approaches should be used to fully understand the phenomenon in order to facilitate landslide stabilization design especially for complex cases. In this paper the case history of the Gimigliano landslide (Southern Italy) is investigated taking advantage of a combinedtechnique approach based on conventional geotechnical measurements used together with modern technologies such as electromagnetic sensing techniques and electrical resistivity tomography. The application...
TC4 Symposium 2014
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Michael Löffler, Ruben Piepgras, Alexander Sutor, Reinhard Lerch
This contribution proposes a method to measure the magnetization of ferromagnetic thin-film samples subjected to mechanical stress. We present our Vector Vibrating Sample Magnetometer and two fixtures that enable the adjustable bending of the ferromagnetic samples during the magnetization measurement. The bending, in turn, results in internal stresses. According to the magnetoelastic effect, the magnetization of ferromagnetic materials depends on internal mechanical stress. Results of two Fe49 Co49 V2 samples are shown which prove the applicability of the proposed method.
TC4 Symposium 2014
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Enrico Ricciardi, Giovanni Ausanio, Vincenzo Iannotti, Vittorio Pasquino, Luciano Lanotte
New experimental results on the capability of innovative elasto-magnetic composites to produce high attenuation of the relative oscillation between two bodies with different rigidities, as well as to elude the resonance effects, are reported. A simple, but very efficient, model of the innovative attenuator working principle, including the determinant role of magnetic force change with vibration, is proposed and its agreement with experimental features is explained. Peculiar potentialities for optimal application of the innovative composite elasto-magnetic attenuators are outlined.
TC4 Symposium 2014
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Daniel M. Toma, Joaquin del Rio, Montserrat Carbonell-Ventura, Ferran Bernet Piquet, Jaume Miquel Masalles
Underwater wireless sensing systems are envisioned for stand-alone applications and as an addition to cabled observatory systems such as the OBSEA marine observatory. Therefore, this work presents a solution on how to generate power for marine wireless sensors using underwater motion energy. In this pare it is described a prototype based on a Bristol cylinder which can generate electrical voltage using piezoelectric bimorphs. Collecting water motion energy using piezoelectric energy harvesting is particularly difficult due to the mismatch between the low frequency of water kinetics and the...
TC4 Symposium 2014
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Mirko Brando, Antonio Cataliotti, Cesare Caramazza, Valentina Cosentino, Giuseppina Ciulla, Dario Di Cara, Davide Gambino, Felice Vesco, Giuseppe Marsala, Antonella Ragusa, Giovanni Tinè
A PC-based instrument has been developed for the monitoring and control of a concentrated photovoltaic and thermal (CPVT) power plant. The instrument allows acquiring both electrical and thermal quantities. Moreover it implements the solar tracking algorithm used to optimize the power production.
TC4 Symposium 2014
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Dominique Fortuné, Daniela Istrate, François Ziadé, Isabelle Blanc
Wideband current transducers with a voltage output are often used to measure AC currents at frequencies up to 1 MHz. The ratio of output voltage to primary current as a function of frequency is the calibration result of these transducers. A traceable method to measure 1 A alternating current at frequencies of 100 kHz and 1 MHz is reported in this paper. The ratio of the wideband current transducer is obtained with expanded uncertainties of 1.3 % for 1 A, 100 kHz and of 2.0 % for 1 A, 1 MHz.
TC4 Symposium 2014
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Goran Petrović, Roman Malarić, Ivana Kardum
Voltage flickers are one of the most important parameters of power quality. It deserves a special attention because people sense it directly through visible light flicker. The IEC 61000-4-15 gives the guidelines and specifications for the development of devices for measuring voltage flicker. In this paper all the building blocks of such model are described in detail. With the help of the simulation algorithm using the software package Matlab Simulink a Flickermeter was created and compared with commercial device.
TC4 Symposium 2014
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Yuri Grigorievich Kononov, Mikhail Aleksandrovich Ospishchev, Vyacheslav Yuryevich Rudnev
The article describes one of the solutions for improving the accuracy of synchronized measurement for electrical grids using sigma-delta ADC measuring systems. Key problems and their solutions are analyzed. A description is given for the developed algorithm and its implementation in FPGA on National Instruments cRIO platform. The voltage and current measurements were conducted on the NI 9225 and NI 9227 modules respectively. Synchronization is provided by the PPS signal, which is generated by a S.E.A. 9472 GPS receiver module. The essence of the proposed method consists of clocking the NI...
TC4 Symposium 2014
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Attilio Di Nisio, Mario Savino, Maurizio Spadavecchia
This paper deals with the large-scale use of monitoring systems which permits both an accurate check on the kilowatt-hour cost along the day and a more effective reward policy in favor of the users who produce energy in higher demand time slots. The development of modern supervisory control systems is necessary to manage the unpredictable nature of green energy power production. Moreover the suppliers of electricity, natural gas and water are able to provide more efficient and reliable tailor-made services through the widespread adoption of ICTs by consumers and industries. However the...
TC4 Symposium 2014
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