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Christian Eugène, Michaël Demeyere
TEACHING THE CORRECT USE OF BASIC MEASURING INSTRUMENTS IN A NONLINEAR CONTEXT: A TRAINING SESSION ON A FLUORESCENT TUBE

In the frame of a basic course on electrical measurements, a training session teaching the correct use of measuring instruments is presented. The context is that of a fluorescent tube, a non-linear device allowing interesting mathematical developments and measuring observations. In this session, the students are asked to evaluate the pertinence of dimming the lamp in terms of luminous efficiency and pollution of the mains.

Slobodan Škundric, Dragan Kovacevic, Dragana Naumovic-Vukovic
THE ROLE AND IMPORTANCE OF SOFTWARE APPLICATION IN INSTRUMENT TRANSFORMERS ACCURACY TESTING

The application of modern electronic solutions and microprocessor technologies has significantly improved measuring methods and devices for instrument transformers accuracy testing. PC hardware and software application options in this filed of measuring techniques significantly increase reliability, efficiency and accuracy. This paper presents the role and importance of software application in instrument transformer accuracy testing that have been developed by the Electrical Engineering Institute “Nikola Tesla”.

Georgios Kouzas, Eleftherios Kayafas, Vassili Loumos
WEB SIMILARITY MEASUREMENTS USING ANT – BASED SEARCH ALGORITHM

In this paper, a web search algorithm is proposed, which aims to enhance the amount of the relevant information in respect to a user’s query. The proposed algorithm is based on the Ant Colony Optimization algorithm (ACO), employing in parallel document similarity issues from the field of information retrieval. Ant Colony Optimization algorithms were inspired through the observation of ant colonies. In our approach, ants are used as agents through Internet, which are capable of collecting information in each node they visit and generate routing paths through the web. The term similarity is used to describe documents with contiguous content.

Piotr Bilski, Wieslaw Winiecki
VIRTUAL REAL-TIME INSTRUMENTATION USING ETS CONFIGURATION

The paper presents the technique of Virtual Instrument design to obtain Real-Time mode. Application of the ETS approach to configure Real-Time instrument is presented and its requirements pointed out. Design of the virtual spectrum analyzer using the ETS technique is described. Detailed analysis of the designed instrument, considering ability to work in Real-Time mode, is conducted. The comparison between the ETS solution and formerly examined, traditional, approach is performed. Conclusions about the abilities of ETS RT virtual instruments and their practical applications are presented.

Andrzej Podgórski, Slawomir Górski, Andrzej Miekina
SOFTWARE FOR ADVANCED USB CONTROLLER TO BE APPLIED IN MEASUREMENT INSTRUMENTATION

The application of an advanced USB controller in measurement instrumentation is proposed. That solution enables the direct connection of any mass memory to a measuring device in order to enhance its functionality. The corresponding software is briefly described and the results of its testing are presented.

R. Anchini, G. Di Leo, C. Liguori, A. Paolillo
NEW MEASUREMENT TECHNIQUES FOR THE ON LINE DIMENSION CHARACTERIZATION OF AUTOMOTIVE RUBBER PROFILES

A vision-based measurement system for the online inspection of automotive rubber profiles is described. The system determines a 3-D reconstruction of the rubber profile section and performs dimensional measurements. After a brief description of the whole measurement system, the main novelties are pointed out: the simple calibration procedure and the flexible tools allowing users to specify the dimensional measurements regardless of the type of the profile to be inspected.

F. Adamo, F. Attivissimo, L. Fabbiano, M. Savino
IMPROVEMENTS OF SEISMIC SENSOR DESIGN FOR SOIL MOISTURE MEASUREMENT

The main aim of the work is finding a general mathematical model to estimate the moisture content in the soil using seismic waves propagation, when the composition of the media is unknown. Usinf the new mathematical model here presented, the authors are developing a prototype of the sensor that will be able to measure the moisture of the soil usinf both compressional and shear waves velocity measurement.

Jerzy Nabielec
A “BLIND” CORRECTION OF DYNAMIC ERROR OF A NONSTATIONARY FIRST ORDER TRANSDUCER FOR THE PERIODIC CASE – SIMULATION INVESTIGATION

The paper presents an extension of the “blind correction” method with respect to nonstationary transducers of the first order. An analytical description of the measuring channels’ dynamics is presented for the case where both: the measured signal and the measuring channels’ parameters are varying with same fundamental frequency. The influence of the measuring system parameters on the correction accuracy was investigated using the simulation methods.

Emil Vremera, Cristian Fosalau, Luciano Brunetti
DESIGN REQUIREMENTS FOR SENSORS BASED ON AMORPHOUS WIRES RESULTING FROM MEASUREMENTS AND SIMULATION

Amorphous wires are attractive components for sensor and micro-sensor realization. The negative factors that affect the behaviors of these sensor types must be however highlighted and compensated throughout adequate tools. The characteristics of the sensing element can be carried-out starting from the measurement results. A model of a magneto-impedance sensing element is obtained and used for a PSPICE simulation next step. The paper presents the results obtained at radio-frequency, at once with the mathematical modeling of the sensitive part. In addition, there are also the requirements which must be fulfilled in the design of this kind of sensors.

Zbigniew Moron
CONSIDERATIONS ON THE ACCURACY OF MEASUREMENTS OF ELECTRICAL CONDUCTIVITY OF LIQUIDS

The purpose of this paper is the presentation of new requirements created by contemporary applications of electrolytic conductivity measurements, the main factors limiting accuracy of such measurements and also discussion of the means enabling minimization of effects caused by these factors. Recently observed demand for accurate microscale conductivity measurements, mainly in biomedical engineering, involves new features required from the conductivity sensors and co-operating electronics: miniaturization, robustness, low price (mass produced, disposable devices). Consequently, a new approach in designing such instrumentation is required.

Page 851 of 912 Results 8501 - 8510 of 9113