IMEKO Event Proceedings

Page 853 of 866 Results 8521 - 8530 of 8655

Bogdan A. Galwas, Remigiusz J. Rak
VIRTUAL LABORATORY - A FUTURE PART OF THE NEW WEB-BASED MODEL OF UNDERGRADUATE ENGINEERING STUDIES DEVELOPED BY WARSAW UNIVERSITY OF TECHNOLOGY

The article gives a review of reasons for developing and adopting a new web-based model of studies by Warsaw University of Technology. That is followed by a description of the Internet and multimedia - based educational model, known as SPrINT. The article presents also a structure of the four-year engineering studies offered by Electrical Engineering Faculty, Faculty of Electronics and Information Technology and Faculty of Mechatronics for given specialization. Then follows a description of the structure and tools of the electronic books. One of the subjects common for all students of the three Faculties is Virtual Laboratory. Virtual Instruments, as well as networked and distributed measurement systems, are the natural tools, which can be used in a modern didactic process for creating virtual laboratories.

Marius Brinzila, Cristian Fosalau, Codrin Donciu, Mihai Cretu
Virtual Library Included in LabVIEW Environment for a New DAS with Data Transfer by LPT

In this work a data acquisition board (DAQB) with data transfer by parallel port LPT and the associated virtual library included into LabVIEW software are presented. The DAQB developed around a National Semiconductor LM 12458 device, have the capability to perform tasks that diminish the host processor work and is capable to communicate with the host computer by using a set of drivers associated. Highly integrated device circuit that has into it the most components of the board, facility in data handling, good metrological performance and a very low cost are the benefits of the proposed system. The novelty of the system consists in the drivers associated that assure the flexibility and the portability of the system and in the fact that you can plug-in the DAQB to the running host computer externally.

Valery A. Granovsky
VIRTUAL MEASUREMENT INSTRUMENTS: TRACEABILITY FUNDAMENTALS AND METHODS

The problems of metrological ensuring virtual measuring instruments (VMI) are discussed. The VMI classification is proposed. The principles of measuring instrument legalization are formulated as a base for the problem solving. As the basic problems, structural identification of VMI, and unauthorised access, and VMI calibration and standardization are pinpointed. It is shown that complete calibration is foreground for VMI similar as to usual measuring instruments, without necessity to certify, separately, measurement software.

Tomasz Bednarz
Virtual Open-Air Museum of Wrecks in the Gulf of Gdansk. 3D digitalization of underwater archaeological sites

In 2015, National Maritime Museum in Gdansk (NMM) have launched the "Virtual Open-Air Museum of Wrecks in the Gulf of Gdansk". This website presents photogrammetric 3D models of wrecks from the Gulf of Gdansk created in the NMM since 2013. Museum have developed an effective system aimed at compilation of records of underwater objects which has made it possible to create the 3D models featured on the website. Apart from their aesthetic qualities, the featured 3D models of wrecks constitute careful copies of the objects and make it possible to create sections, projections and animation of any kind. The website now contains thirteen 3D models of wrecks with their descriptions, photo and video documentation. By the end of 2018, NMM is planning to post on the website www.wsw.nmm.pl eight more wrecks from the Gulf of Gdansk and more wrecks in the next years.

C. Damian, C. Zet, I. Enculescu, R. Spohr
Virtual Potentiostat

In recent years, nanowires have attracted considerable attention because of their expected extraordinary physical properties and large number of possible applications in research and technology. There are different techniques to get nanowires, like electrodeposition from aqueous solutions or growth from vapors, each one characterized by special conditions and limitations. The electrodeposition process asks for a potentiostat This article presents such a device realized around a PC with data acquisition board allowing the remote control and data recording over long time periods.

B. Fock
VIRTUAL POWER SOURCES

For the calibration of power meters, it is preferred to use virtual sources that supply voltage and current at their outputs with high accuracy and in a manner that the phase angle between the two electric quantities can be set to the desired value. Due to the direct calibration procedure, these sources are required to be stable and accurate as well. As a transformer is included in the voltage- and current amplification circuits, the inherent nonlinearity of transformers and the handling of problems due to the effect of diffuse parameters (stability, accuracy and distortion) become of great importance. The high accuracy requirements reawakened the mathematical- and physical models that describe the operation of transformers as a function of frequency, with various diffuse parameters also taken into account. In the implementation the dependence of various diffuse quantities (inductance, capacitance) and the iron losses on the signal level raises difficulties; in fact, these result in the alteration of the corner points in the transfer function as well as undesirable accentuation.

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.

C. Donciu, M. Cretu, I. Prisecaru, M. Temneanu
VIRTUAL STAND FOR TESTING STEPPING MOTORS USED AS INCREMENTAL ENCODER

In the present paper, prototype architecture for a virtual stand for stepping motors converted as rotary encoder study is illustrated.

Ondrej Šubrt, Miloslav Kubar, Pravoslav Martinek, Jirí Jakovenko
VIRTUAL TESTING METHOD FOR STATIC ADC NON-LINEARITY – RSD CYCLIC A/D CONVERTER CASE

One of the recent approaches to test A/D converter performance is the so-called Servo-Loop Method. This method is aimed at the non-linearity extraction of static ADC transfer curve. In this paper, we prove an advanced Servo-Loop version focusing on behavioral and transistorlevel example of the Residual Signed Digit (RSD) cyclic A/D converter design. The background of the considered Servo-Loop version was proposed. In this paper, we establish a Virtual Testing Environment (VTE) built on Verilog-A implementation of the Servo-Loop unit fully integrated into Cadence design environment. Powerful capabilities of the proposed VTE were successfully confirmed by a large set of behavioral and transistor-level simulations in Spectre.

Olli Aumala
Virtual Tools for Education

This introduction to the Virtual Workshop presents the scope and recalls some related papers presented in the latest IMEKO World Congress in 2000. Links to relevant documents and files are also included. They are operative during the Workshop, some of them even later on.

Page 853 of 866 Results 8521 - 8530 of 8655