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Petr Cesak, Jaroslav Roztocil
Client-server based education tool for measurement applications

This paper describes an application called server emulator. It is one part of the system for remote measurement. The system is based on the server-client communication structure over the Internet.

Beata Palczynska, Ludwik Spiralski, Jacek Wyszkowski
Measuring system of low frequency electromagnetic field on board of ships

The way of measurement of low frequency electromagnetic field intensity is presented. Computer measurement system is described, which can be used for RMS value isotropic measurement and recording of electric and magnetic components of electromagnetic field time waveforms. Later the off-line time-frequency analysis of the recorded signals can be done. Selected results of measurements made onboard Gdynia Maritime University research-training vessel are performed.

Vladimír Smotlacha, Petr Tyml, Jan Cermák
Calibration of Time Stamp Authorities

The time stamp service is a network time service providing time stamp to a specific byte sequence sent to a time stamp authority/ appliance (TSA). The accuracy of the provided time stamp shall be specified by the TSA and should be calibrated. This paper discusses methods for calibration of TSA using a calibration computer and taking into account the impact of the network. The methods have been tested on an experimental TSA placed in different distances from the calibration computer and in different networks.

A.S. Fiorillo, C. Fosalau, G. Scarfone, C. Damian
A Remote Web System for Testing PVDF Sensors

In this article we describe the remote driving, via Internet, of the ultrasound sensor that can work in two different ways, for locating and sizing isolated scatterers and for ultrasonic ranging by real-time digital phase measurements. The sensor is located in the laboratory of Electrical Measurements of the Technical University of Iasi, Romania, while the remote control is located in the BioMechatronics Laboratory of the University of Magna Græcia at Catanzaro, Italy.

Karel Draxler, Renata Styblikova
Checks on a Toroidal Compensated Current Comparator with Additional Circuits

Methods for checking the sensitivity of a toroidal compensated current comparator and its inherent errors and auxiliary circuits are described in this paper. Results of the measurements are also given in graphical form.

Wim Foubert, Patrick Boets, Leo Van Biesen
The effects of in-home wiring for VDSL transmission

In this paper, it is shown how the downstream en upstream capacity of a VDSL connection will be affected if the in-home splitter is not installed according to the client installation instructions. The established data rate will be investigated for several real-life in-home cabling topologies.

Aimé Lay-Ekuakille, Giuseppe Vendramin, Amerigo Trotta
Sensor Control Unit Design for a Photoacoustic Indoor Multi-Gas Monitor

Anesthetic gaseous components are necessary to be evaluated in hospital facilities, especially in surgical pavilions. Exposure to anesthetic gases in the health sector, whether in the operating room, recovery room, or in the context of outpatient clinics, may entail a health risk for the personnel exposed. Although health care workers are exposed to much lower anesthetic concentrations than the patients, this exposure often extends over many years. Personnel often indicate fatigue and headaches, especially when occupational hygiene conditions are inadequate. The decisive factors as concerns, the adverse health effects of exposure to anesthetic gases, are mainly the type of gases used, the length of exposure, and the gas concentrations. This paper aims to describe an attempt (successful) to design a sensor control unit in order to improve photoacoustic instrumentation.

Luka Ferkovic, Damir Ilic
Dependence of mutual inductance of a precise Rogowski coil on the primary conductor position

A Rogowski coil is well-known current-to-voltage transducer, and in order to use it for the high-accuracy measurement of AC current (at power supply frequency) all influencing quantities and their contribution should be recognized and analyzed. Therefore, in this paper the analysis of the partial influence due to the position of the primary conductor relatively to the secondary coil, with the nonhomogeneous density of secondary turns, is analyzed. The measured deviation of the mutual inductance in this case showed very good agreement with the theoretical prediction, which is promising toward the expected application of such sensor.

Gheorghe Todoran, Rodica Holonec
Cubic Spline Virtual Instruments Associated To Symbolic Transmittance Of Circuit

This paper develops the synthesis of some elementary cubic spline virtual instruments associated to the symbolic transmittance of circuits. The implementation of these virtual instruments is based on the power of LabVIEW programming language to develop modular applications. The method has a pronounced educational purpose and can be used in electric and electronic circuits time analysis. The general symbolic transmittance of such circuits is expressed like a linear combination of elementary symbolic transmittances. An elementary first or second order differential equation is associated to an elementary symbolic transmittance. The solutions of this equation are given by a third order spline approximates and the algorithms lead to the synthesis of inferior order spline virtual instruments. Using a cascade connection of such elementary virtual instruments, a high order virtual instrument associated to the general symbolic transmittance is obtained. Finally, the circuit response can be determined.

Gabriel Gasparesc, Ciprian Dughir
Algorithm For Signal Reconstruction After Dynamic Compression In A Power Quality Monitoring System

This paper describe an adaptive algorithm for signals companding in the field of power quality monitoring systems, where the amplitude of signals disturbated with electromagnetic disturbances which affect the power supply quality can be very high, in last decades has increase the interest for ensure power quality and electromagnetic compatibility.

Page 805 of 936 Results 8041 - 8050 of 9356