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prof. Ing. Vladimír Haasz, CSc.

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F0-Lab - the simple tool for laboratory experiments in measurement and instrumentation

  • DOI: 10.1117/12.2530621
  • Odkaz: https://doi.org/10.1117/12.2530621
  • Pracoviště: Katedra měření
  • Anotace:
    Platform F0-Lab including LEO (Little Embedded Oscilloscope) was designed and developed to substitute a professional set of instruments in experiments concerning electronics, measurement, and instrumentation. It is based on a microcontroller, which includes the sufficiently fast ADC. It enables to realize (in connection with PC) a simple DC voltmeter, a digitizing oscilloscope, a waveform recorder, and a PWM signal generator. The microcontroller can be placed in a solderless breadboard where the student realizes experimental circuits. The PC controls this virtual instrument, displaying results and supplying the power of the entire set using USB. F0-Lab is successfully used for three years and more than 300 various implementations have been already realized.

How to Support Interest in Engineering in Secondary Education

  • DOI: 10.1117/12.2528379
  • Odkaz: https://doi.org/10.1117/12.2528379
  • Pracoviště: Katedra měření
  • Anotace:
    Two activities, how to increase interest in the study of electrical engineering and electronics, are described in the paper: workshops for teachers and participation in the Embedded Technology Club for students. Workshops for teachers acquaint them with the utilization of IT in a laboratory education, to make it more attractive and so to increase the interest of students to study natural sciences or engineering. The educational low-cost laboratory system and its applications in laboratories are presented during the workshop. The Embedded Technology Club (ETC) is a club intended as for students of secondary schools, who has an interest in electronics, as for other persons interested in this area. The business is focused both on education in the fundamentals of up-to-date design, development, and programming of electronic devices and solving some more simple projects concerning instrumentation. Activities are designed so that also students of secondary schools, who have no experience with electronics, but only basic knowledge in physics, can take part in. The priority is to have the interest to learn new things and to get hands-on experience.

Preparatory Course “Practical Electronics” Focused on Measurement and Instrumentation

  • DOI: 10.1117/12.2528387
  • Odkaz: https://doi.org/10.1117/12.2528387
  • Pracoviště: Katedra měření
  • Anotace:
    The one-week intensive preparatory course “Practical Electronics” focused on measurement and instrumentation, which is designed especially for school-leavers of secondary schools (high schools in the USA), is described in the article. In many cases students, who are coming at the CTU in Prague, Faculty of Electrical Engineering, have only a vague idea of electronics despite they use electronic devices every day. The course is organized before the 1st semester and only basic secondary education in physics is supposed. It is divided between a theoretical part and a laboratory work. Each day starts with two hours lecture, where the actual laboratory work is explained. The following activities run in laboratories. A set of necessary components, solderless breadboard, connecting wires, and a low-cost multimeter are prepared for each student. While the 1st day is devoted to the connection of the simplest electric circuits and voltage measurements using a low-cost multimeter, the 2nd day starts with connecting of the virtual measuring instrument (VI) based on a microcontroller, which includes a simple DC voltmeter, a digitizing oscilloscope, and a pulse generator. It is used in tasks solved in the following part of the course.

Elektrická měření - Přístroje a metody

  • Pracoviště: Katedra měření
  • Anotace:
    Stejně jako původní vydání knihy Elektrická měření – přístroje a metody z roku 2003 i toto shrnuje informace týkající se oblasti elektrických a magnetických měření na úrovni absolventa inženýrského studia elektrotechnických oborů. Vzhledem k prudkému rozvoji elektroniky a číslicové techniky však byla náplň většiny kapitol značně modernizována popř. rozšířena a část věnovaná analogovým přístrojům naopak významně zredukována. V publikaci jsou vysvětleny základní principy používané v současné době pro měření elektrických popř. magnetických veličin a principy nejčastěji používaných metod pro měření ostatních fyzikálních veličin s mezipřevodem na elektrický signál. Jsou popsány též běžně používané měřicí přístroje a principy jejich činnosti, s čímž samozřejmě souvisí i jejich vlastnosti. Vzhledem k tomu, že jejich základním blokem jsou analogově-číslicové popř. číslicově-analogové převodníky, je samostatná kapitola věnována i digitalizaci signálu. Problematika určování nejistot měření je klíčovým parametrem při řízení a kontrole kvality výroby. Nejistotám měření je proto věnována nejen celá 1. kapitola, ale odhad nejistot je také zmíněn i v kapitolách věnovaným metodám měření aktivních elektrických veličina parametrů pasivních součástek.

Progress in Study Programs at CTU – Faculty of Electrical Engineering 16 Years after the Bologna Declaration

  • Pracoviště: Katedra měření
  • Anotace:
    Main changes in study programs at the Czech Technical University in Prague (CTU) based on the Bologna declaration were completed more than 10 years ago. The bachelor and master degree studies were strictly separated, and new separate study plans had to be worked out. It brought both advantages and disadvantages, and later it resulted in further changes in the study programs. The paper aims to show how CTU, the Faculty of Electrical Engineering (CTU–FEE), has taken the advantage of the changes and how the disadvantages have been solved.

Changes in a basic course of electrical measurement caused by development in microelectronics

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: 2014 joint IMEKOTC1-TC7-TC13 Symposium: Measurement Science Behind Safety and Security. Madeira: IOPscience, 2015, ISSN 1742-6588. Available from: http://iopscience.iop.org/1742-6596/588/1/012010
  • Rok: 2015
  • DOI: 10.1088/1742-6596/588/1/012010
  • Odkaz: https://doi.org/10.1088/1742-6596/588/1/012010
  • Pracoviště: Katedra měření
  • Anotace:
    Changes in electrical measurement and instrumentation caused by a development in microelectronics should be reflected also in education. This trend runs more than 50 years. At present it relates especially to substitution of analogue signal processing by digital processing of sampled signal in a number of measuring instruments. The actual essential changes in the basic course of electrical measurement at the Faculty of Electrical Engineering of the Czech Technical University (CTU) in Prague corresponding to this progress in last years are presented.

PRECISE SYNCHRONISATION IN INDUSTRIAL SYSTEM USING IEEE 1588 PRECISE TIME PROTOCOL

  • Pracoviště: Katedra měření
  • Anotace:
    To increase the quality of synchronization in industrial distributed systems is a frequent demand at present. Node synchronization can be implemented in the Ethernet network using time protocols, e.g. IEEE 1588 Precise Time Protocol (PTP). However, active network components like switches and routers have negative influence on achieved accuracy of synchronization because they affect a packet delay variation in the network. To suppress this effect, special (but expensive) industrial switches, with a packet propagation delay correction, can be used. Another way using either low cost GPS receivers for synchronization of local clocks or a special timing for data transfer is described in the paper. It will allow a cheaper solution that preserves high quality of synchronization. Besides, a device for packet delay measurement (PTP tester) was designed and developed to be possible to evaluate the proposed methods.

Non-linearity Correction Based on INL(n) Approximation - Experimental Verification

  • Autoři: Suchánek, P., prof. Ing. Vladimír Haasz, CSc., Slepička, D.
  • Publikace: IDAACS 2013 - Proceedings of the 2013 IEEE 7th International Conference on Intelligent Data Acquisition and Advanced Computing Systems. Berlin: IEEE, 2013. pp. 2-5. pozn.: CD má na nálepce jiné ISBN: 978-1-4799-1427-2. ISBN 978-1-4799-1426-5.
  • Rok: 2013
  • DOI: 10.1109/IDAACS.2013.6662628
  • Odkaz: https://doi.org/10.1109/IDAACS.2013.6662628
  • Pracoviště: Katedra měření
  • Anotace:
    Correction of ADC non-linearity can improve the accuracy of AD conversion. Except other possibilities the analytical inverse function of INL(n) curve can be applied. The first achieved result was published in [1]. Further simulations took into account also additive noise, jitter in sampling, non-zero sampled signal phase and hysteretic behavior of the ADC. The result of these imulations was published in [2]. Evaluation of the method using real data of several different AD modules is introduced in this paper.

Post-Correction of ADC Non-Linearity Using Integral Non-Linearity Curve

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Slepička, D., Suchánek, P.
  • Publikace: International Journal of Computing. 2013, 12(1), 56-62. ISSN 1727-6209.
  • Rok: 2013
  • Pracoviště: Katedra měření
  • Anotace:
    The accuracy of AD conversion can be improved using the post-correction of digitizer non-linearity. In principle two methods could be applied – look-up table or an analytical inverse function of integral non-linearity curve (INL(n)). Look-up table can be easily implemented but it demands huge memory space particularly for high resolution ADCs. Inverse function offers flexible solution for parameterization (e.g. frequency dependence) but it also requires fast DSP for real-time correction. The data or coefficients for both methods are frequently determined from a histogram of acquired pure sinusoidal signal. Non-linearity curve can also be gained by another procedure demanding significantly less samples – approximation from a frequency spectrum. The correction of ADC nonlinearity by means of inverse function of INL(n) curve is analyzed in this paper and the results are presented.

Evaluation of ADC Non-linearity Correction Based on INL(n) Approximation

  • Autoři: Suchánek, P., prof. Ing. Vladimír Haasz, CSc., Slepička, D.
  • Publikace: BEC 2012 - 2012 13th Biennial Baltic Electronics Conference. Tallin: Tallin University of Technology, 2012, pp. 101-104. IEEE. ISSN 1736-3705. ISBN 978-1-4673-2773-2.
  • Rok: 2012
  • Pracoviště: Katedra měření
  • Anotace:
    Accuracy of AD conversion can be improved using correction of ADC non-linearity. An application of the analytical inverse function of INL(n) curve (except other possibilities) can be used. The application of this method is dependent on the possibility to derive the nverse function to the function approximating the INL(n) curve. The first achieved result was published in [4]. The results of further simulations, which take into account also additive noise, jitter in sampling, non-zero sampled signal phase and hysteretic behavior of the ADC, are published in this paper.

Evaluation of ADC Non-linearity Correction Based on INL(n) Approximation

  • Autoři: Suchánek, P., prof. Ing. Vladimír Haasz, CSc., Slepička, D.
  • Publikace: BEC 2012 - Proceedings of the 13th Biennial Baltic Electronics Conference. Tallinn: Tallinn Technical University, 2012. pp. 101-104. ISSN 1736-3705. ISBN 978-1467-3277-4-9.
  • Rok: 2012
  • DOI: 10.1109/BEC.2012.6376825
  • Odkaz: https://doi.org/10.1109/BEC.2012.6376825
  • Pracoviště: Katedra měření
  • Anotace:
    Accuracy of AD conversion can be improved using correction of ADC non-linearity. An application of the analytical inverse function of INL(n) curve (except other possibilities) can be used. The application of this method is dependent on the possibility to derive the inverse function to the function approximating the INL(n) curve. The first achieved result was published in [4]. The results of further simulations, which take into account also additive noise, jitter in sampling, non-zero sampled signal phase and hysteretic behavior of the ADC, are published in this paper.

Education in Measurement and Instrumentation in Continental Europe after Implementation of Bologna Declaration

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: IMEKO Symposium TC-4, TC-19 & IWADC Instrumentation for the ICT Area. Košice: Technical University of Košice, 2010, pp. 42-45. ISBN 978-1-61782-338-1.
  • Rok: 2010
  • Pracoviště: Katedra měření
  • Anotace:
    Changes in study programs at European universities based on Bologna declaration concern also the education in measurement and instrumentation (M&I). The bachelor and master stages are at the most of universities strictly separated in the new study plans, whilst only at some ones a so-called "integrated master program" arose. Study programs at a number of universities in continental Europe, where electrical engineering is taught, have been compared from the view of education in M&I. Whilst at the most of them the education in M&I is concerned to the bachelor study stage and one or two basic courses are offered, at several universities exist some additional specialized courses. Concerning master study stage, only some of the scanned universities offer separate specialization in M&I, the other universities offer some additional specialized courses only.

ADC Nonlinearity Correction Based on INL(n) Approximations

  • Autoři: Suchánek, P., prof. Ing. Vladimír Haasz, CSc., Slepička, D.
  • Publikace: IDAACS 2009 - IEEE International Workshop on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications. Como: IEEE Instrumentation and Measurement Society, 2009. p. 137-140. ISBN 978-1-4244-4881-4.
  • Rok: 2009
  • Pracoviště: Katedra měření
  • Anotace:
    nonlinearity. The correction of this imperfection can be accomplished in the output data but only if the nonlinearity is well characterized. Two methods - application of look-up table or an analytical inverse function of INL(n) curve - from other possibilities can be used for the ADC nonlinearity correction. The first results of correction using look-up table were published in [5]. The application of inverse function, which is dependent on the possibility to derive the inverse function to the function approximating the INL(n) curve, is published in the paper.

Doctoral Degree Study of Measurement and Instrumentation in the Czech Republic

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: XIX IMEKO World Congress 2009 - Fundamental and Applied Metrology. Lisbon: Instituto Superior Técnico/Instituto de Telecomunicaçoes Portugal, 2009. ISBN 978-963-88410-0-1.
  • Rok: 2009
  • Pracoviště: Katedra měření
  • Anotace:
    instrumentation in the Czech Republic is mentioned in the first part of the paper. The study is running usually as a specialization of the branch control engineering. The separate study program "Measurement and Instrumentation" is running at the Czech Technical University in Prague - Faculty of Electrical Engineering, which is described in the second part of paper in detail.

High-Quality Low-Cost Low-Frequency Filter for ADC Testing

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Slepička, D.
  • Publikace: XIX IMEKO World Congress 2009 - Fundamental and Applied Metrology. Lisbon: Instituto Superior Técnico/Instituto de Telecomunicaçoes Portugal, 2009. pp. 558-561. ISBN 978-963-88410-0-1.
  • Rok: 2009
  • Pracoviště: Katedra měření
  • Anotace:
    This paper deals with the generation of low-distortion sine wave signal by means of low-cost filter for the purpose of ADC testing at the signal frequency of 20 kHz. The design and manufacture of such a filter is proposed and the functionality of a prototype is verified on a top digitizer.

Experience of Implementation of Bologna Declaration in Engineering Branch in the Czech Republic (Including Teaching Measurement and Instrumentation)

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: 16th IMEKO TC4 International Symposium. Florence: University of Florence, Faculty of Engineering and Faculty of Economics, 2008. pp. 697-700. ISBN 978-88-903149-3-3.
  • Rok: 2008
  • Pracoviště: Katedra měření
  • Anotace:
    New study programmes corresponding to Bologna declaration started in the Czech Republic in 2002 (bachelor study stage), but in electrical engineering generally in 2003. Therefore the first run of master study stage has finished this year. The common experience from the 3 runs of the bachelor study stage concerning engineering in the Czech Republic is presented in the first part of the paper. The second part deals with structure of measurement education in the Czech Republic after implementation of Bologna Declaration and problems pertinent to it.

Experimental Verification of Different Models of the ADC Transfer Function

  • Autoři: Suchánek, P., Slepička, D., prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: 16th IMEKO TC4 International Symposium. Florence: University of Florence, Faculty of Engineering and Faculty of Economics, 2008. p. 1109-1114. ISBN 978-88-903149-3-3.
  • Rok: 2008
  • Pracoviště: Katedra měření
  • Anotace:
    The performance of current devices is mostly limited by the analogue front-end and analogue-todigital converter's (ADC) imperfections. ADC performance is not, as commonly known, ideal. One of the most important parameters is the nonlinearity, which if it is known, can be corrected in the output data. The performance of three different approximations of ADC nonlinearity (common polynomials, Chebyshev polynomials and Fourier series) and achieved results concerning accuracy of approximations, noise sensitivity and nonlinearity correction are presented in the paper.

Models of the ADC Transfer Function - Sensitivity to Noise

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Slepička, D., Suchánek, P.
  • Publikace: IMTC - International Instrumentation and Measurement Technology Conference Proceedings. Victoria: IEEE, 2008. pp. 583-587. ISSN 1091-5281. ISBN 978-1-4244-1540-3.
  • Rok: 2008
  • Pracoviště: Katedra měření
  • Anotace:
    This paper describes several approaches of modeling nonlinearities of analog to digital converters (ADC). First results of three approximations are introduced and compared - the common polynomials, Chebyshev polynomials Fourier series.

Several Approaches to ADC Transfer Function Approximation and their Application for ADC Non-Linearity Correction

  • Autoři: Suchánek, P., Slepička, D., prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: Metrology and Measurement Systems. 2008, 15(4), 501-511. ISSN 0860-8229.
  • Rok: 2008
  • Pracoviště: Katedra měření
  • Anotace:
    The performance of current electronic devices is mostly limited by analog front-end and analog-to-digital converter's (ADC) actual parameters. One of the most important parameters is ADC nonlinearity. The correction of this imperfection can be accomplished in the output data but only if the nonlinearity is well characterized. Many approaches to ADC characterization have been proposed in scientific articles in the last several years. In this paper three different approximations of ADC low-frequency non-linearity (common polynomials, Chebyshev polynomials and Fourier series) were analyzed and the practical applicability, approximation accuracy and noise sensitivity were investigated. The first results of nonlinearity correction were presented, too.

Approaches to the ADC Transfer Function Modelling

  • Autoři: Suchánek, P., prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: 12th TC4 International Workshop on ADC Modelling and Testing. Iasi: CERMI Publishing House, 2007. pp. 127-130. ISBN 978-973-667-264-4.
  • Rok: 2007
  • Pracoviště: Katedra měření
  • Anotace:
    This paper describes several approaches to model ADC nonlinearities. It mentions and describes power series approximation, Chebyshev polynomials, Bessel functions and Hammerstein block structure.

Influence of Test Signal Phase Noise on High-Resolution ADC Testing

  • Pracoviště: Katedra měření
  • Anotace:
    The testing of high-resolution ADCs based on the majority of standardized methods requires pure sine-wave test signal. The reason of the requirement for signal's purity is that measured ADC parameters are potentially influenced by test signal imperfections such as distortion and wideband noise but also its short term frequency changes (phase noise). The influence of signal distortion and noise has already been the subject of many contributions; an analysis of phase noise, its effect on test results and possibilities of its suppression or correction are the subject of this paper. The validity of phase noise analysis and of proposed methods is also demonstrated on experimental measurements.

Posteriori Frequency Spectrum Correction for Test Signal Imperfections in ADC Testing at 1 MHz - Practical Experience

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Slepička, D.
  • Publikace: 12th TC4 International Workshop on ADC Modelling and Testing. Iasi: CERMI Publishing House, 2007. pp. 68-72. ISBN 978-973-667-264-4.
  • Rok: 2007
  • Pracoviště: Katedra měření
  • Anotace:
    In the last several years, many high-resolution and high-speed ADCs have appeared on the market. Since the signal purity of commercial generators particularly at MHz frequencies has not essentially increased in the same period, the problem of how to test ADCs has rose. This fact initiated the research of alternative methods based on either the application of special signals or posteriori correction of the measured sine-wave signal. The latter method concerning a simple correction in the frequency domain was already analyzed, extended and practically applied. The application and the results of this extended method at the frequency of 1 MHz are presented in this paper.

Practical Aspects of Dynamic ADC Testing in Frequency Range 1 to 20 MHz

  • Autoři: Suchánek, P., Komárek, M., prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: BEC 2006 - 2006 International Baltic Electronics Conference. Piscataway: IEEE, 2006. pp. 167-168. ISSN 1736-3705. ISBN 1-4244-0414-2.
  • Rok: 2006
  • Pracoviště: Katedra měření
  • Anotace:
    There are two important issues that can arise during dynamic testing of digitisers - problem with impedance matching and disturbance in ground loops. The influence of correct termination of used filters is discussed in the first part of the paper. The ground-loop disturbance elimination is described in the second part of the paper. The ground-loop arose due to the fact that system devices are powered from one net supply with protective wire.

System for Testing Middle-Resolution Digitizers Using Test Signal up to 20 MHz

  • Pracoviště: Katedra měření
  • Anotace:
    In the last years, universal measurement setup for high-resolution ADC testing at the frequency of 1 MHz was designed and prototyped at the Dept. of Measurement, CTU FEE. The experience and good measurement results initiated the extension of the system frequency range up to 20 MHz. In this paper, the extended measurement setup is introduced in two versions: low-cost version enabling the testing of 11-13 bit ADCs and high-quality version for the evaluation of even 20 bit ADCs.

Testing of Middle-resolution Digitisers at Input Signal Frequency of 1 MHz

  • Pracoviště: Katedra měření
  • Anotace:
    A system for the testing of digitisers in the frequency range of 1 MHz was developed at the Dept. of Measurement, CTU FEE a few years ago. Two alternates of the system were manufactured - a precision design using special high-quality LC filters with a near-linear transfer characteristic and a low-cost design employing common LC filters using coils with ferromagnetic cores. Both alternates were used for testing several types of middle-resolution digitisers (12-18 bit).

Evaluation of ADC Testing Systems Using ADC Transfer Standard

  • Pracoviště: Katedra měření
  • Anotace:
    A transportable high-stable reference AD device was designed and built for a comparison of systems for testing the dynamic quality of ADCs or AD modules. Three different input modules can be used in the frequency range up to 5 MHz. First, this paper refers to the results of an AD device application in the frequency range of the testing signal up to 100 kHz (comparison of four ADC testing systems in different laboratories, evaluation of a short time amplitude and/or frequency instability of testing signal generators). Second, it describes the first experience of its application in the frequency range from 100 kHz to 5 MHz.

Extension of the Test System for Middle-Resolution Digitisers up to 20 MHz

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Kalina, J., Komárek, M., Slepička, D., Suchánek, P.
  • Publikace: Proceedings of the 14th International Symposium on New Technologies in Measurement and Instrumentation and 10th Workshop on ADC Modelling and Testing. Gdynia/Jurata: IMEKO TC-4, 2005. p. 400-403. ISBN 83-89786-37-0.
  • Rok: 2005
  • Pracoviště: Katedra měření
  • Anotace:
    The system for testing of digitisers at the frequency of input signal of 1 MHz designed and manufactured at the Dept. of Measurement in the last years was extended for the frequencies up to 20 MHz. Sets of common LC filters (both band pass and band stop) for frequencies 4.4, 9.5 and 19.5 MHz were developed. First experiments showed that these low-cost LC filters based on coils with ferromagnetic cores are sufficient for direct testing of digitisers with ENOB < 14 at a frequency of the test signal up to 10 MHz and for digitisers with ENOB < 12 up to 20 MHz.

Measurement Education in Study Branch "Computer Science and Engineering"

  • Autoři: prof. Ing. Vladimír Haasz, CSc., doc. Ing. Jiří Novák, Ph.D.,
  • Publikace: Proceedings of the 14th International Symposium on New Technologies in Measurement and Instrumentation and 10th Workshop on ADC Modelling and Testing. Gdynia/Jurata: IMEKO TC-4, 2005. p. 549-553. ISBN 83-89786-37-0.
  • Rok: 2005
  • Pracoviště: Katedra měření
  • Anotace:
    The study branch concerning computer science and engineering (which offers the study programs of a number of Faculties of Electrical Engineering and Informatics) is often primarily focused on software engineering. It brings a tendency to minimize an amount of basic courses relevant to electrical engineering in this study branch. It concerns also the education in measurement and instrumentation. The paper describes the approach applied at the CTU in Prague, Faculty of Electrical Engineering to solve this matter. A content of lectures and labs of the basic course "Measurement in Digital Circuits" and briefly also of the optional course "Diagnostics of Digital Devices" is presented.

Měření dynamických vlastností rychlých analogově číslicových převodníků a modulů s vysokou rozlišitelností - problémy a možnosti jejich řešení

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: EE - Odborný časopis pre elektrotechniku a energetiku. 2005, 11(1,2), 26-27. ISSN 1335-2547.
  • Rok: 2005
  • Pracoviště: Katedra měření
  • Anotace:
    V článku jsou uvedeny možnosti, jak modifikovat základní metody pro měření dynamických vlastností AČ převodníků a modulů tak, aby je bylo možné použít i v případě rychlých AČ převodníků a modulů s vysokou rozlišitelností. Jsou zde zmíněny metody využívající úzkopásmových vysoce kvalitních filtrů s nízkým zkreslením, číslicové korekce známého zkreslení testovacího signálu, neharmonického testovacího signálu složeného ze dvou harmonických signálů s různými kmitočty a nedeterministického testovacího signálu (šumu). Jako perspektivní je navržena (a popsána) metoda využívající pro filtraci testovacího signálu běžné LC filtry a následující číslicovou korekci zbytkového zkreslení.

Měření dynamických vlastností rychlých analogově číslicových převodníků a modulů s vysokou rozlišitelností - problémy a možnosti jejich řešení (dokončení z min. čísla)

  • Pracoviště: Katedra měření
  • Anotace:
    V článku jsou uvedeny možnosti, jak modifikovat základní metody pro měření dynamických vlastností AČ převodníků a modulů tak, aby je bylo možné použít i v případě rychlých AČ převodníků a modulů s vysokou rozlišitelností. Jsou zde zmíněny metody využívající úzkopásmových vysoce kvalitních filtrů s nízkým zkreslením, číslicové korekce známého zkreslení testovacího signálu, neharmonického testovacího signálu složeného ze dvou harmonických signálů s různými kmitočty a nedeterministického testovacího signálu (šumu). Jako perspektivní je navržena (a popsána) metoda využívající pro filtraci testovacího signálu běžné LC filtry a následující číslicovou korekci zbytkového zkreslení.

Návrh dalších kriterií pro rozdělování dotace na vzdělávací činnost VVŠ podporujících jejich kvalitativní rozvoj

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Ježek, F.
  • Publikace: 6. seminář "Hodnocení kvality vysokých škol". Ústí nad Labem: Univerzita J. E. Purkyně, 2005. p. 138-147. ISBN 80-7044-652-8.
  • Rok: 2005
  • Pracoviště: Katedra měření
  • Anotace:
    Příspěvek se zabývá problematikou struktury financování vzdělávací činnosti veřejných vysokých škol z pohledu jejich budoucího rozvoje. Vychází z výsledků projektu "Rozvoj veřejných vysokých škol, finanční podmínky a předpoklady" a na základě silných a slabých stránek dosavadní struktury financování (jež podporuje kvantitativní rozvoj VVŠ) navrhuje změny, které by v souladu s Koncepcí reformy vysokého školství v ČR podpořily růst kvality. V závěru jsou tyto změny porovnány s návrhem struktury financování VVŠ v r. 2005.

System for the Testing of High-resolution ADCs at Frequency of 1 MHz

  • Pracoviště: Katedra měření
  • Anotace:
    A system for the testing of ADCs at the frequency range of 1 MHz was designed and prototyped at the Dept. of Measurement, CTU FEE. Two methods were applied to suppress the influence of signal distortion: - Filtering by special high-quality filters with a near-linear transfer characteristic - Filtering by low-cost filters and the application of following numerical correction of residual distortion Low-cost as well as high-quality filters were manufactured. Experimental results showed that the method is directly applicable for the testing of ADCs with the ENOB up to 14 in case of low-cost filters and up to 20 in case of high-quality filters. An extension of the method for the testing of ADCs with hither ENOB can bring an application of the frequency spectrum correction method.

Testing of High-Resolution/Middle-Speed A/D Converters and Modules - Problems and Ways of Solving them

  • Pracoviště: Katedra měření
  • Anotace:
    The paper describes basic methods for dynamic ADC testing and solution, how to improve a quality of basic testing methods to be possible to use them for dynamic testing high-resolution / middle speed AD converters and AD modules. The method, which combines a filtration of testing signal and a following digital correction, is described and proposed as the perspective one. The AD transfer standard, which is applied for an evaluation of testing methods and systems is also mentioned.

Virtual Instrument - No Virtual Reality but Real PC Based Measuring System

  • Pracoviště: Katedra měření
  • Anotace:
    Real measuring systems based on a host PC, where the PC is used for set-up and control of measurement, data acquisition, data processing and displaying results are usually called Virtual Instruments (VIs). Some examples of virtual instruments designed, realized or applied at CTU-FEE, Dept. of Measurement are given here.

Dynamic Testing of AD Converters with High Resolution in Higher Frequency Range

  • Autoři: Slepička, D., prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: Workshop 2004. Praha: České vysoké učení technické v Praze, 2004. pp. 418-419. ISBN 80-01-02945-X.
  • Rok: 2004

Frequency Spectrum Correction Method for the ADC Testing

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Slepička, D.
  • Publikace: IMTC'04 Proceedings of the 21th IEEE Instrumentation and Measurement Technology Conference. Como: IEEE Instrumentation and Measurement Society, 2004. pp. 533-536. ISBN 0-7803-8248-X.
  • Rok: 2004

Frequency Spectrum Correction Method for the ADC Testing

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Slepička, D.
  • Publikace: IMTC/04 Proceedings of the 21th IEEE Instrumentation and Measurement Technology Conference. Como: IEEE Instrumentation and Measurement Society, 2004. pp. 533-536. ISBN 0-7803-8249-8.
  • Rok: 2004

Frequency Spectrum Correction Test - Practical Experience

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Slepička, D.
  • Publikace: 9th European Workshop on ADC Modelling and Testing. Athens: IMEKO TC-4, 2004. pp. 881-886. ISBN 960-254-645-X.
  • Rok: 2004

Frequency Spectrum Correction Test - Practical Experience

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Slepička, D.
  • Publikace: 9th European Workshop on ADC Modelling and Testing. Athens: IMEKO TC-4, 2004. p. 881-886.
  • Rok: 2004

From Errors to Uncertainties in Basic Course in Electrical Measurements

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Sedláček, M.
  • Publikace: 13th International Symposium on Measurements for Research and Industry Applications. Athens: IMEKO TC-4, 2004. pp. 701-706.
  • Rok: 2004

From Errors to Uncertainties in Basic Course in Electrical Measurements

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Sedláček, M.
  • Publikace: 13th International Symposium on Measurements for Research and Industry Applications. Athens: IMEKO TC-4, 2004. p. 701-706. ISBN 960-254-643-3.
  • Rok: 2004

Performance of Data Acquisition Systems from the User's Point of View

  • Autoři: Alegria, F., Girao, P., prof. Ing. Vladimír Haasz, CSc., Serra, A.
  • Publikace: IEEE Transactions on Instrumentation and Measurement. 2004, 53(4), 907-914. ISSN 0018-9456.
  • Rok: 2004
  • Pracoviště: Katedra měření
  • Anotace:
    In this paper the authors comment on a set of problems related to data acquisition system specification from the user s point of view and present examples that justify their concerns with the past lack of standardization in this domain. References to the new project of standard IEC 62008 are made and reveal that the authors expect it to be a positive contribution to overcome users problems when designing systems requiring data acquisition capabilities.

Accurate Measuring Ensures both Competitiveness and the Quality of Production

  • Pracoviště: Katedra měření
  • Anotace:
    Naturally, the accuracy of measurement in industry is instrumental in ensuring the quality of products and consequently their competitiveness. The Czech Metrological Institute provides services related to the accuracy of measurement in The Czech Republic (CR). The research, development and production of measuring instruments and systems is essential not only for research, but also for industrial production. The research of measuring equipments is mainly executed in special departments of technical universities, whereas the production is concentrated to the small and medium-sized companies in the CR.

Comparative Measurements of Parameters of Systems Used for ADC Testing

Evaluation of ADC Testing Systems Using ADC Transfer Standard

Evaluation of ADC Testing Systems Using ADC Transfer Standard

  • Pracoviště: Katedra měření
  • Anotace:
    A transportable high stable reference AD device was designed and built for a comparison od systems for testing of the dynamic quality of ADCs or AD modules. Three different input modules enable its use in the frequency range up to 5 MHz. First, this paper refers to the results of the AD device application in the frequency range of the testing signal up to 100 kHz (comparison of four ADC testing systems in different laboratories, evaluation of a short time amplitude and/or frequency instability of testing signal generators). Second, it describes the first experience of its application in the frequency range from 100 kHz to 5 MHz.

Evaluation of Short-Time Instability of Generators Used for ADC Testing

Evaluation of Short-Time Instability of Generators Used for ADC Testing

  • Pracoviště: Katedra měření
  • Anotace:
    The quality of an evaluation of dynamic parameters of ADCs and AD modules is strongly dependent on the quality of testing signal generator. The most important parameters are the signal to noise ratio (SNR) and the spectral purity (THD). Besides, the short-time frequency and amplitude stability are also necessary to be considered, but it is often marginalized. However, they also influence the accuracy of the further evaluation. A possibility, how to estimate this imperfection, is presented in the paper.

New Trends in ADC Testing and Modelling

Performance of Data Acquisition Systems from User's Point of View

  • Autoři: Alegria, F., Girao, P., prof. Ing. Vladimír Haasz, CSc., Serra, A.
  • Publikace: IMTC/03 Proceedings of the 20th IEEE Instrumentation and Measurement Technology Conference. Vail, Colorado: IEEE Instrumentation and Measurement Society, 2003. pp. 940-945. ISSN 1091-5281. ISBN 0-7803-7705-2.
  • Rok: 2003

Performance of Data Acquisition Systems from User's Point of View

  • Autoři: Alegria, F., Girao, P., prof. Ing. Vladimír Haasz, CSc., Serra, A.
  • Publikace: IMTC/03 Vail Colorado USA 20-22 May 2003. Vail, Colorado: IEEE Instrumentation and Measurement Society, 2003. p. 940-945. ISBN 0-7803-7706-0.
  • Rok: 2003

Performance of Data Acquisition Systems from User's Point of View

  • Autoři: Alegria, F., Girao, P., prof. Ing. Vladimír Haasz, CSc., Serra, A.
  • Publikace: IMTC/03 Proceedings of the 20th IEEE Instrumentation and Measurement Technology Conference. Vail, Colorado: IEEE Instrumentation and Measurement Society, 2003. p. 940-945. ISSN 1091-5281. ISBN 0-7803-7705-2.
  • Rok: 2003

Přesné měření zajišťuje kvalitu výroby i konkurenceschopnost

Some Aspects of Standardising Performance Characteristics for Modular Data Acquisition Systems

Testing of High-Resolution/Middle-Speed A/D Converters and Modules - Problems and Ways of Their Solving

Transportable Reference AD Device - New Innovated Version

Transportable Reference AD Device - New Innovated Version

AD Modules under Disturbing Influence

Can Be Estimated the Measurement Uncertainty of DAQ System from Data Sheets of Used A/D Modules?

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: 12th IMEKO TC4 International Symposium: Electrical Measurement and Instrumentation. Proceedings. Zagreb: IMEKO TC4, 2002. p. 374-377. ISBN 953-96093-7-2.
  • Rok: 2002

Can Be Estimated the Measurement Uncertainty of DAQ System from Data Sheets of Used A/D Modules?

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: 12th IMEKO TC4 International Symposium ELECTRICAL MEASUREMENT AND INSTRUMENTATION. Proceedings. Zagreb: IMEKO TC4, 2002. pp. 374-377. ISBN 953-96093-6-4.
  • Rok: 2002

Changes in Education of Measurement and Instrumentation at CTU in Prague Caused by Implementation of Bologna Declaration

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: 12th IMEKO TC4 International Symposium ELECTRICAL MEASUREMENT AND INSTRUMENTATION. Proceedings. Zagreb: IMEKO TC4, 2002. p. 535-538. ISBN 953-96093-6-4.
  • Rok: 2002

Changes in Education of Measurement and Instrumentation at CTU in Prague Caused by Implementation of Bologna Declaration

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: 12th IMEKO TC4 International Symposium: Electrical Measurement and Instrumentation. Proceedings. Zagreb: IMEKO TC4, 2002. p. 535-538. ISBN 953-96093-7-2.
  • Rok: 2002

Comparison of Parameters of Systems Used for AD Converters and Modules Testing

Reference ADC Standard - Comparison of ADC Testing Methods

Research of New Methods for Physical Quantities Measurement and their Application in Instrumentation

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: Proceedings of Workshop 2002. Praha: Czech Technical University in Prague, 2002. p. 408-409. ISBN 80-01-02511-X.
  • Rok: 2002

Simple Device for Small Dimension Measurement Using CCD Sensor

Simple Device for Small Dimension Measurement Using CCD Sensor

Standardisation of DAQ Systems with Regard to EMC

Transportable High Stable Reference AD Module

Disturbance Immunity of A/D PC Cards (PCMCIA) and EMC Conditions in Notebooks

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Pištínek, F.
  • Publikace: ADC Modelling and Testing. Lisboa: Technical University of Lisbon, 2001. p. 93-95. ISBN 972-98115-5-5.
  • Rok: 2001

Disturbance Immunity of AD PC Cards (PCMCIA) and EMC Conditions in Notebooks

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Pištínek, F.
  • Publikace: TEMI 2001 - Trends in Electrical Measurement and Instrumentation and 6th Euro Workshop on ADC Modelling and Testing. Lisboa: IMEKO TC4, 2001. pp. 93-95. ISBN 972-98115-6-3.
  • Rok: 2001

EMC of AD Modules of DAQ Systems

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Pištínek, F.
  • Publikace: Proceedings of Workshop 2001. Praha: České vysoké učení technické v Praze, 2001. pp. 326-327. ISBN 80-01-02335-4.
  • Rok: 2001

Some Aspect of Standardisation of Performance Characteristics for Modular Data Acquisition Systems

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Schumny, H.
  • Publikace: ADC Modelling and Testing. Lisboa: Technical University of Lisbon, 2001. pp. 47-50. ISBN 972-98115-5-5.
  • Rok: 2001

Some Aspect of Standardisation of Performance Characteristics for Modular Data Acquisition Systems

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Schumny, H.
  • Publikace: TEMI 2001 - Trends in Electrical Measurement and Instrumentation and 6th Euro Workshop on ADC Modelling and Testing. Lisboa: IMEKO TC4, 2001. p. 47-50. ISBN 972-98115-6-3.
  • Rok: 2001

Transfer Standard ADC

Transportable AD Box for Comparative Measurement

Transportable AD Box for Comparative Measurement

Transportable Reference AD Converter

AD Modules under Disturbing Influence

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Schumny, H.
  • Publikace: Messtechnische Charakterisierung der AD-/DA-Umsetzung. Berlin: PTB Berlin, 2000. pp. 26.
  • Rok: 2000

ADC Test Using Filtering and Digital Correction

  • Autoři: Andrle, M., prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: XVI IMEKO World Congress IMEKO 2000 - EWADC'2000. Wien: TU Wien, Abteilung Austauschbau und Messtechnik, 2000. pp. 15-19. ISBN 3-901888-12-8.
  • Rok: 2000

Advanced Method for ADC Testing Generators Verification

Dynamické testování A/Č modulů

Elektromagnetická kompatibilita analogově-číslicových modulů systémů pro měření, sběr a zpracování dat

Filters Design for ADC Testing

  • Autoři: Andrle, M., prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: Proceedings of Workshop 2000. Praha: České vysoké učení technické v Praze, 2000. pp. 178. ISBN 80-01-02229-3.
  • Rok: 2000

Influence of Disturbance on Measurement Precision Using AD Plug-in Boards

Investigation of New Methods for Measurement and Instrumentation

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: Proceedings of Workshop 2000. Praha: České vysoké učení technické v Praze, 2000. pp. 181. ISBN 80-01-02229-3.
  • Rok: 2000

Nové výsledky v oblasti testování dynamických vlastností AČ modulů

Selected Problems of DAQ Systems Standardisation

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Schumny, H.
  • Publikace: XVI IMEKO World Congress IMEKO 2000 - EWADC'2000. Wien: TU Wien, Abteilung Austauschbau und Messtechnik, 2000. pp. 133-139. ISBN 3-901888-12-8.
  • Rok: 2000

System for Dynamic Testing of Analog to Digital Modules

Transportable High Stable Reference AD Module

Alternative Method of A/D Conversion Quality Verification

  • Autoři: Pokorný, M., prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: IMTC/99 Proceedings of the 16th IEEE Instrumentation and Measurement Technology Conference. Piscataway: IEEE, 1999. p. 1421-1424. ISBN 0-7803-5276-9.
  • Rok: 1999

Aspects of A/D Modules Dynamic Testing

Disturbance Immunity of PC Plug-In Boards

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Pištínek, F., Purkert, M.
  • Publikace: IWADC'99 - 4th International Workshop on ADC Modelling and Testing. Bordeaux: Laboratoire IXL-ENSERB, 1999. pp. 166-169.
  • Rok: 1999

Experience of Advanced Methods Based on FFT Test Application

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Pokorný, M.
  • Publikace: IWADC'99 - 4th International Workshop on ADC Modelling and Testing. Bordeaux: Laboratoire IXL-ENSERB, 1999. pp. 253-256.
  • Rok: 1999

Immunity of AD Plug-in Boards to Disturbance Caused in PC Measuring Systems

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Pištínek, F.
  • Publikace: 8th Scientific Conference Theoretical Electrical Engineering and Electrical Measurement. Košice: Dep. of Theoretical Electrical Engineering and El. Measurement FEI TU of Košice, 1999, pp. 91-96.
  • Rok: 1999

Spectrum Correction Test - Modification of Method for ADC Quality Verification

  • Autoři: Pokorný, M., prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: 8th Scientific Conference Theoretical Electrical Engineering and Electrical Measurement. Košice: Dep. of Theoretical Electrical Engineering and El. Measurement FEI TU of Košice, 1999, pp. 198-203.
  • Rok: 1999

System for Dynamic Testing of AD Modules

Dojde k novelizaci normy IEE 488.1 a jejímu rozšíření o HS488?

Influence of Disturbance in a PC on the Number of Effective Bits of AD Plug-in Boards

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Pištínek, F.
  • Publikace: ISDDMI 98 10th International Symposium on Development in Digital Measuring Instrumentation. Naples: Faculty of Engineering, 1998, pp. 411-415.
  • Rok: 1998

Influence of Internal Disturbing Field in Computer Case on Real Accuracy of Data Acquisition Plug in Board

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Pištínek, F.
  • Publikace: Workshop 98. Praha: České vysoké učení technické v Praze, 1998, pp. 339-340.
  • Rok: 1998

Methods for Dynamic Quality Tests of AD-Modules and Microcontrollers with Integrated AD-Converters

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Schumny, H.
  • Publikace: ISDDMI 98 10th International Symposium on Development in Digital Measuring Instrumentation. Naples: Faculty of Engineering, 1998, pp. 419-423.
  • Rok: 1998

PCI - sběrnice i pro průmyslové systémy

Suppression of Test Signal Distortion by A/D Modules Dynamic Testing

System for Quality Testing of Ripple Control Receiver

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Pištínek, F., Titěra, M.
  • Publikace: Metrology for Quality Control in Production - Proceedings. Wien: TU Wien, Abteilung Austauschbau und Messtechnik, 1998. pp. 209-214. ISBN 3-901888-02-0.
  • Rok: 1998

System for Testing of Ripple Control Receiver Using Multifunction Plug-In Board PCI-MIO-16XE-10

Systems for Dynamic Performance Testing of Precision Analog-To-Digital Modules

Testing of Dynamic Quality of AD Modules with Standard Interfaces and Problems Connected with it

Testování dynamických vlastností A/Č modulů a integrace měřicích systémů

Use of PC DAQ Systems for Measurement of Parameters of Power Electronic Equipment and Problems Connected with It

An Optimisation of Speed of Data Processing by Measurement of Distorted Waveforms

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Ničovský, D.
  • Publikace: DSP'97 - 3rd Int. Conference on Signal Processing. Košice: TU Košice, FEI, 1997. pp. 128-131. ISBN 80-967634-4-4.
  • Rok: 1997

Dynamické vlastnosti zásuvných měřicích desek do PC a jejich testování

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: A-Č a Č-A převodníky - typy a aplikace. Ostrava: Přírodovědecká fakulta OU, 1997. pp. 62-72.
  • Rok: 1997

Grafické vývojové prostředí HP VEE

Influence of a Disturbing EM Field on the Real Number of Effective Bits of PC Plug-In A/D Boards

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Pištínek, F.
  • Publikace: XIV IMEKO World Congress: New Measurements - Challenges and Visions. Helsinki: Finnish Society of Automation, 1997. pp. 183-186. ISBN 951-96567-7-4.
  • Rok: 1997

Průmyslové komunikační systémy

Průmyslové komunikační systémy

What Influences Speed of Data Processing by Multichannel Measurement of Distorted Waveforms?

Automatic System for Testing of Dynamic Quality of PC Plug-in A/D Boards

  • Pracoviště: Katedra měření
  • Anotace:
    Počet efektivních bitů popisuje dynamické vlastnosti zásuvných měř.desek. Systém pro jejich automatické měření se skládá z generátoru sinusového signálu řízeného po sběrnici IEEE 488, PC s testovanou měřicí deskou a řídicího programu

Automatic System for Testing of Dynamic Quality of PC Plug-in A/D Boards

  • Pracoviště: Katedra měření
  • Anotace:
    Systém umožňuje automatické měření počtu efektivních bitů měřicích desek do PC. Skládá se z generátoru sinusového signálu řízeného po sběrnici IEEE 488, PS s testovanou měř.deskou a řídicího programu

Dynamic Testing of A/D Plug-in Boards

  • Pracoviště: Katedra měření
  • Anotace:
    Příspěvek popisuje metody pro dynamické testování zásuvných A/Č měřicích desek

Experimental Results of A/D Plug-in Boards Dynamic Testing

  • Pracoviště: Katedra měření
  • Anotace:
    Při aplikaci měřicích desek do PC jsou významné též jejich dynamické vlastnosti. Pro jejich testování byla použita metoda nejlépe proložené sinusovky. Přitom byl zkoumán vliv použitého generátoru a modifikace základní metody

First Experience with Using a VME System for Measurement

  • Pracoviště: Katedra měření
  • Anotace:
    Za účelem analýzy vlastností různých typů AČ modulů pro VME systémy byly změřeny parametry: max.vzork.rychlost při spouštění program.smyčkou, čas.neurčitost spouštění, vnitřní šum a počet ef.bitů.

Grafické vývojové prostředí HP VEE

  • Pracoviště: Katedra měření
  • Anotace:
    V příspěvku je představeno grafické vývojové prostředí HP VEE pro programování měřicích, řídících a testovacích systémů. Jsou popsány použité objekty, jejich propojení, řízení programu signálovými toky, atd.

Měření parametrů periodických průběhů systémy na bázi zásuvných měřicích desek do PC

  • Pracoviště: Katedra měření
  • Anotace:
    V článku jsou popsány typické struktury multifunkční měřicí desky do PC, její dynamické vlastnosti, algoritmy používané pro výpočet parametrů vzorkovaných průběhů a rozbor chyb

Problems and Limitations of Using DAQ Systems Based on PC Plug-in Boards for Measurement of Distorted Waveforms in Power Networks

  • Pracoviště: Katedra měření
  • Anotace:
    Použití systémů na bázi zásuvných měřicích desek do PC pro testování aktivních kompenzačních zařízení v rozvodných sítích, analýza vlivu dynamických parametrů zásuvných měřicích desek na tato měření

Synchronous or Asynchronous Sampling by Measurement of Parameters of Periodical Signals?

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: New Measurement and Calibration Methods of Electrical Quantities and Instruments. Budapest: IMEKO TC4 Technical Committee on Measurement of Electrical Quantities, 1996, pp. 115-117. ISBN 963-420-491-0.
  • Rok: 1996
  • Pracoviště: Katedra měření
  • Anotace:
    V příspěvku jsou analyzovány metody synchronního a asynchronního vzorkování periodických signálů z hlediska chyb měření parametrů vzorkovaných průběhů

Virtual Instrument for Multichannel Measuring of Quality of Three-Phase Active Compensation Device

  • Pracoviště: Katedra měření
  • Anotace:
    Vlastnosti aktivního kompenzačního zařízení lze testovat na modelu sítě, v jehož hlavních bodech se měří klíčové veličiny. K tomuto účelu byl vyvinut virtuální přístroj na bázi zásuvných měřicích desek do PC.

Determination of Period for Pulse Waveforms with Several Zero Crossings During one Period

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Štádler, P.
  • Publikace: Proceedings of the IEEE International Symposium on Industrial Electronic. Piscataway: IEEE, 1995. p. 622-627. ISBN 0-7803-2683-0.
  • Rok: 1995

Generation of Couples of Typical Nonsinusoidal Waveforms (Both Voltage and Current) with Defined Parameters

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Pištínek, F., Vopálenský, D.
  • Publikace: 7th International Symposium on Modern Electrical and Magnetic Measurement. Part 1. Praha: ČVUT FEL, Elektra, 1995, pp. 310-314. ISBN 80-01-01360-X.
  • Rok: 1995

Reflection of Present-Day Measurement Technology in the Measurement Curriculum at CTU Prague

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Kocourek, P., Sedláček, M.
  • Publikace: 7th International Symposium on Modern Electrical and Magnetic Measurement. Part 1. Praha: ČVUT FEL, Elektra, 1995, pp. 270-274. ISBN 80-01-01360-X.
  • Rok: 1995

The Generation of Typical Nonsinusoidal Waveforms for Testing of Sampling Methods of Measurement

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Vopálenský, D.
  • Publikace: Workshop 95. Praha: České vysoké učení technické v Praze, 1995, pp. 205-206.
  • Rok: 1995

Use of Data Acquisition Systems Based on PC Plug-in Boards and Some Problems Connected with It

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: Proceedings of the 7th International IMEKO TC-13 Conference on Measurement in Clinical Medicine. Bratislava: Slovenská akademie věd, 1995, pp. 123-125. ISBN 80-967402-0-2.
  • Rok: 1995

Use of Sampling Methods for Multichannel Measuring of Quality of Active Compensation in Three-Phase Systems

  • Autoři: prof. Ing. Vladimír Haasz, CSc.,
  • Publikace: 6th International Conference on Industrial Metrology. Zaragoza: KRONOS, 1995, pp. 299-308. ISBN 84-88502-23-0.
  • Rok: 1995

Grafické vývojové prostředí pro programování měřicích, řídicích a testovacích systémů

Labwindows Projects at CTU Prague

Měřicí, řídící a simulační software HPVEE

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Štěpka, Z.
  • Publikace: International Workshop Measurement and Control 94. Ostrava: VŠB-TUO, 1994, pp. 50-53.
  • Rok: 1994

PC Instruments Based on Multifunction Plug-in Cards

The Influence of Parameters of the Plug-in Cards to Dynamic Measurement Accuracy

The Problems of the Use of Multifunction Plug-in Cards for Dynamic Measurement

  • Autoři: prof. Ing. Vladimír Haasz, CSc., Kocourek, P.
  • Publikace: Intelligent Instrumentation for Remote and On-Site Measurements. Brussels: IMEKO, 1993. pp. 391-396. ISBN 90-9006205-X.
  • Rok: 1993

Za stránku zodpovídá: Ing. Mgr. Radovan Suk