I. Lima, H. Alves, R. T. Lopes
Dimensional microtomography metrology is a new approach in the petroleum and gas industry. Petrophysical characterization can be achieved by quantitative properties, such as porosity, which is one of the main parameter for the knowledge of reservoir potential. For example, the microporosity is a major factor of control water saturation in oil and gas reservoir. The smaller the pixel size the better the spatial resolution of the system, which leads to the investigation of the micropore network. The goal of this work is to investigate the impact of different pixel sizes on the characterization...
TC10 Workshop 2013
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I. Lima, D. de Oliveira, E. V. Moreira, L. C. Chad, M. Ponciano, R. Manão, R. T. Lopes
The reliable of inspection and measurements in a non-destructive way is quite important in industrial area, mainly when it is related to quality control of weld joints. Ultrasound and Radiography can be used in order to check weld integrity. However they just can often be identified by visual inspection. 3D x-ray microtomography permits a real time quantitative investigation all over the micro architectural of the sample with a very good spatial resolution (micro order). The porosity parameter can be very important because it is related to the properties of alloy interconnects, such as...
TC10 Workshop 2013
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A. Lopes Ribeiro, H. M. Geirinhas Ramos, Dário Pasadas, Tiago Rocha
This paper presents a remote field eddy current probe that includes a giant magneto-resistance (GMR) as magnetic sensor in order to detect longitudinal and circumferential defects in stainless steel tubes. The high sensibility of the GMR sensor in a large frequency range (0 Hz – 1 MHz) allows us to consider that it can be a good candidate to analyze several defects in tubing by a remote field testing method. Experimental data were acquired by a measurement system to verify the sensibility of the GMR in defect detection and to create a new probe. In this work, simulations were also made in...
TC10 Workshop 2013
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Helena G. Ramos, Tiago Rocha, Jakub Král, Dário Pasadas, Artur L. Ribeiro
Eddy current testing (ECT) is a non destructive technique that can be used in the measurement of conductive material thickness. In this work ECT and a machine learning algorithm (support vector machine - SVM) are used to classify the thicknesses of three different types of conductive plates. Eddy currents are induced by imposing a voltage step in an excitation coil, while a giant magnetoresistor (GMR) magnetic sensor measures the transitory magnetic field intensity in the sample vicinity. An experimental validation procedure, including machine training with linear and exponential kernels and...
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P. Chiquet, P. Masson, J. Postel-Pellerin, R. Laffont, G. Micolau, F. Lalande, A. Regnier
A new experimental setup used to perform non-destructive measurement of electrical quantities on semiconductor devices is described in this paper. The particular case of tunneling current measurement in n-type metal-oxide-semiconductor (MOS) capacitors, whose dielectrics play a crucial role in non-volatile memories, has been investigated. When the gates of such devices are polarized with a sufficient bias voltage while the other terminals are grounded, tunnel conduction of electrons through the thin oxide layer is allowed. Typical tunneling current measurements obtained with this advanced...
TC10 Workshop 2013
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Ljupco Arsov, Marija Cundeva-Blajer, Iljas Iljazi, Ivana Arsova
The paper deals with power quality in the industry. A virtual instrument-power meter and power quality analyser is described. The instrument enables complete monitoring of all the powers and power quality parameters, as well as simultaneous measurements of voltages and currents and application for Motor Current Signature Analysis (MCSA) and technical diagnostics. The results of measurements of different industrial plants are shown and their influence on the power quality is evaluated and discussed. The complete and continual measurements of the powers and power quality characteristics give...
TC10 Workshop 2013
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Francesco Bertocci, Ada Fort, Marco Mugnaini, Santina Rocchi, Luay Shahin, Valerio Vignoli
A measurement system designed for characterizing resistive metal oxide sensors based on novel materials is described. The system can simultaneously test up to 8 sensors. It exploits an ad hoc structure based on an alumina substrate equipped with electrodes, a heater and an accurate temperature sensor, on which the material under study can be easily deposited by screen printing, spin coating or dip coating. The system allows for studying the sensor behavior by accurately setting the operating conditions in terms of environment composition, gas flow, humidity and temperature. The system is...
TC10 Workshop 2013
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Ileana Bodini, Matteo Lancini, Simone Pasinetti, David Vetturi
Traffic calming devices on urban streets, such as elevated pedestrian crossings, speed bumps and roundabouts, are increasingly used, therefore bus passengers on-board comfort assessment is an actual problem. In order to measure vibrational on-board comfort for public transport standing passengers related to traffic calming, an acquisition system called ASGCM (Autonomous System for Geo-referenced Comfort Measurements) has been developed, taking as a reference the European regulations on rail transports. Thanks to ASGCM, each measurement of vibration, on-ground velocity and acceleration is...
TC10 Workshop 2013
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Michele Scagliarini
Multivariate measurement systems analysis is usually performed designing suitable gauge R&R experiments ignoring available data generated by the measurement system while used for inspection or process control. This work proposes an approach that, using the data that are routinely available from the regular activity of the instrument, offers the possibility of assessing multivariate measurement systems without the necessity of performing a multivariate gauge study. It can be carried out more frequently than a multivariate gauge R&R experiment, since can be implemented at almost no additional...
TC10 Workshop 2013
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M. Numan Durakbasa, Anil Akdogan, A. Serdar Vanli, Asli Günay
Cutting tool geometry including tool edge radius is not only important for determination of tool lifetime but also have a direct effect on workpiece surface characteristics. This geornetry is created in manufacturing phase and changes occur in machining processes. In this regard, to indicate it precisely in different scales has vital importance. Most of the existing studies have focused on manufacturing parameters such as cutting speed, feed rate, depth of cut, tool geometry, and various coatings, to indicate effects of surface roughness of the machined part in two-dimensional. Limited...
TC10 Workshop 2013
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