Francesco Lamonaca, Domenico Luca Carnì, Domenico Grimaldi
The Measurement Instruments (MIs) connected by Hardware Interface (HI) to the node of the Distributed Measurement System (DMS) can coordinate their operations by synchronized trigger signals sent from the HIs to MIs. In the research it is taken into consideration the case that the HIs cannot be connected to DMS and, then, the MIs are standalone. With this aim a new architecture of HI is proposed for the synchronous triggering of the MI. The proposed architecture avoids the random effects of concurrency of the software processes running on PC, and reduces the random causes of delay to detect...
TC4 Symposium 2014
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Bernhard Baumgartner, Christian Riesch, Manfred Rudigier
This paper presents a general introduction to the Precision Time Protocol (PTP), defined in the IEEE 1588-2008 standard [1] and its novelties in comparison to existing time synchronization and distribution concepts so far used in the electric power industry. Subsequently the paper provides an overview on the so-called power profile according to IEEE C37.238-2011 [2] which has been defined for integrating PTP time synchronisation into modern power systems applications. The next section of the paper focuses on implementation and transition scenarios in power utilities including infrastructural...
TC4 Symposium 2014
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Domenico Capriglione, Luigi Ferrigno, Antonio Del Giudice, Giorgio Graditi, Vincenzo Paciello, Antonio Pietrosanto
Smart metering wireless sensor networks need to refer to a common time scale for several reasons. As examples: (i) in power quality, some measures at different nodes of the network are senseless if not synchronized; (ii) in security, in case of lack of synch, a replay attack could result successful; (iii) in billing, different times of the day can be charged differently. Generally, the synchronization can be reached in many ways, in this paper the authors make a comparison between different synchronization techniques considering a communication protocol specifically designed for measures...
TC4 Symposium 2014
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Gabriele Oliva, Roberto Setola, Marios Polycarpou
In this paper we provide a distributed way to transform the network topology underlying a set of agents embedded in a bi-dimensional space into a planar graph, and specifically into a Gabriel graph. Moreover, a distributed algorithm based on synchronized consensus methodologies is provided in order to gather some useful pieces of meta-information (number of faces, average size of the faces, size of the boundary, etc.) and to let each node in the Gabriel graph identify its “role" (i.e., node that links two subgraphs, node on a branch ending with a leaf, node belonging to a face, etc.). The...
TC4 Symposium 2014
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Anatoliy Platonov, Konrad Jędrzejewski
The paper presents the results of studies on the performance of flash analog-to-digital converters (ADC) and adaptive cyclic ADC (AC ADC), their information characteristics and probability of saturation. Currently, these parameters are not used as the performance criteria in A/D conversion theory and applications, and their introduction would extend possibilities of designing both ADCs and utilizing them systems. There is also presented original approach to the improvement of ADCs performance under additional condition guaranteeing that probability of their saturation does not exceed a given...
TC4 Symposium 2014
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Balázs Renczes, István Kollár
In this paper sine fitting algorithms are investigated for the purpose of ADC testing. The aim is to decide whether the minimum of the cost function (CF) has been reached. For this, two different types of algorithms, the conventional Levenberg-Marquardt and the genetic-type Differential Evolution methods are investigated in order to compare their optima. It is shown that due to roundoff errors the bottom of the cost function is fairly uneven for conventional number representations for the Maximum Likelihood method, hence the minimum can only be determined with decreased precision. Finally, a...
TC4 Symposium 2014
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Pasquale Arpaia, Carlo Baccigalupi, Miguel Cerqueira Bastos, Michele Martino
A 15MS/s, 10 ppm repeatable acquisition system to characterize 3 μs rise-time trapezoidal voltage pulses is proposed. The system is based mainly on a low-noise, 5MHz bandwidth analog front-end. In this paper, the requirements, the concept and physical design are illustrated. Simulation results aimed at assessing the circuit performance are presented. An experimental case study on the characterization of a pulsed power supply for the klystrons modulators of the Compact Linear Collider (CLIC) under study at CERN is reported. In particular, the experimental metrological characterization of the...
TC4 Symposium 2014
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Vilmos Pálfi, István Kollár
The sinewave histogram test is a commonly used method to characterize nonlinear behavior of A/D converters. Accurate test results require wise choice of the test settings and signal parameters. However, standard methods do not support the recognition of bad parameter settings. In addition, those may provide inaccurate results even when the signal settings are optimal for the histogram test. This paper presents a software which helps handling above problems and deficiencies to guarantee the quality of the test results.
TC4 Symposium 2014
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Tamás Virosztek, István Kollár
Several test methods are available to examine static and dynamic properties of analog-todigital converters (ADCs). The most robust and straightforward ones are codified in international standards released by the IEEE, or by the IEC. These methods have been improved based on ideas proposed in scientific papers published in the field of ADC testing. However, there are algorithms and test techniques that are not yet standardized, but could be very useful to achieve more information concerning the device under test. These are predominantly amendments of the standard methods, elaborated to...
TC4 Symposium 2014
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Ernesto Cascone, Giovanni Biondi
The paper describes the results of an almost two-year long monitoring period of the field performance of the foundation soils of two tanks founded on a clay soil deposit improved using the technique of preloading and vertical drains. During the preloading period settlements were monitored measuring the vertical displacements of settlement platforms by topographic survey. During the hydraulic leakage tests of the tanks their settlements were measured using a level probe along a flexible pipe placed in a shallow excavation under each tank. The measurement results are discussed showing their...
TC4 Symposium 2014
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