L. Carretta, G. Giorgi, R. Napolitano, C. Narduzzi, M. Stellini
Introduction or upgrades of digital Power Line Carrier (PLC) communications equipment often require a new assessment of relevant power line features. This paper outlines an effective approach for measurement of the most important parameters in a PLC channel, which exploits advances in digital oscilloscope technology and software post-processing of acquired test data. Experimental results obtained on a 132 kV distribution line are presented to support the theoretical discussion.
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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Emil Vremera, Luciano Brunetti, Luca Oberto, Marco Sellone
In the paper there are described different algorithms that are possible to be used in the microcalorimeter-based measurements for realizing the broadband high frequency power standards. Besides the equal time-intervals alternating algorithms, able to achieve the effective efficiency of the transfer power standards, it is presented a novel algorithm, based on keeping constant the limits of the microcalorimeter output quantity. The new method should be used for measuring the high frequency losses in magnetic amorphous wires.
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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Daniel Belega, Dominique Dallet, David Slepička
In this paper the influence of quantization noise on the amplitude estimation of a sine wave by energy-based method is investigated. A condition for the number of acquired samples is derived to ensure that the absolute amplitude error due to the quantization noise is smaller than a desired value with a high confidence level. Based on this condition some important conclusions are drawn. Carried out simulation confirms the validity of the derived condition.
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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Giuseppe La Paglia, Gian Carlo Bosco, Marco Lanzillotti, Luca Callegaro
Top-class multifunction instruments (multimeters and calibrators) implement in their firmware adjustment procedures requiring a minimal set of adjustment standards. The small set of standards' values provided have effects on the (usually very broad) ranges of values and frequencies which the instrument can measure. How errors and uncertainties in the adjustment of specific points affect measurements in such broad ranges has been experimentally investigated in top-class multimeters and calibrators; most interesting results have been observed in the ‘ac voltage’ function; a number of examples...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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Richard Fertell
Real-life example of laboratory automation of data collection, device calibration, measurement uncertainty calculations & certificates for Liquid Mass Flow and Volumetric Flow Rate. Wet suits are not required to evaluate and compare coriolis mass flow meters and turbine volumetric flow meters in re-circulating systems and weigh standards. The effects of time, temperature, density, viscosity, air-buoyancy, flow stability, EMI and others can be startling; who knew? An off-the-shelf liquid recirculating system with data collection is evaluated with transfer standards for liquid flow rate and...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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Koichi Funada, Mituo Nagao, Susumu Sakano
The paper presents hardware and software architecture of the developed multi-finger hand robot using tactile sensors. The hand has three identical fingers. The fingers can detect hard and soft physical information by the tactile sensors using phase shift method. The soft and hard objects can be grasped and held easily by detecting slipping properties between the fingers and object. The development of dexterous robot hand is a very challenging endeavor. Many robot researchers has pursued the dexterous robot hands. Many robot hands have been developed over the past. These robot hands make it...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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Luca Callegaro, Vincenzo D’Elia, Fabrizio Manta
A setup for the measurement of linearity of precision ac voltmeters in the audio frequency range is described. The setup is based on an inductive voltage divider (IVD) as linearity standard. Since the IVD is calibrated under no-load conditions, the setup is provided with a compensation of the loading current absorbed by the voltmeter. The compensation is automated and based on a commercial lock-in amplifier. As examples, measurements of the linearity of two top-class ac voltmeter (a J. Fluke 5790A and a Datron Wavetek 4920) are reported.
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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Luciano Bruno Faruolo, M.T., Marina Rodrigues Brochado, D.Sc, Adriana da Cunha Rocha, D.Sc
The load transported by road vehicles is subject of concern for the traffic authorities worldwide. The weight excess in vehicles has a direct impact on society, because of the detrimental effect on roads life time. The damaged roads lead to a higher number of accidents and deaths, damage vehicles and cause delays on trips. The technology for the identification of the force exerted by a vehicle on the road is the main factor for controlling the road usage. Measuring instruments have been installed along the roads to monitor the vehicles load and to check the associated parameters established...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
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Fabio Leccese
A simplified architecture of subranging pure linear folding ADC is proposed. The device is based on the folding idea to eliminate the DAC, the summing node and the amplifier, fundamental elements of the classical architecture, replacing them by means of an analogical signal preprocessing parallel structure named “channels”. The presented circuit in addition to the advantage of a reduction of total conversion time than a classical subranging ADC, so approaching ADC flashes, is very simple and easy to build. An accurate simulation of the single channels and of the whole structure validate the...
A.Fort, C. Lotti, M. Mugnaini, R.Palombari, S. Rocchi, V.Vignoli
In this work the authors propose the development and the characterization of two NO 2 amperometric detection systems, based on two different solid state electrochemical sensors. Both sensors have a Nickel Oxide counter electrode, a Graphite working electrode, and Nafion as protonic conductor. The first detection system exploits a two-electrode sensor that presents satisfactory sensitivity to NO 2 , a very low cross-response to interfering gases (CO, O 2 ), a short response time, and that requires a simple front-end electronics. Nevertheless, the usage of this sensor is limited to the...
Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
· TC4
· 2008
· Download