Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Michal Ulvr"'
Autor:
Michal Ulvr
Publikováno v:
AIP Advances, Vol 8, Iss 4, Pp 047505-047505-9 (2018)
This paper presents single-layer, double-layer and ten-layer planar square search coils designed for AC magnetic flux density amplitude measurement up to 1 T in the low frequency range in a 10 mm air gap. The printed-circuit-board (PCB) method was us
Externí odkaz:
https://doaj.org/article/4267c1025e5c409e936d353872300460
Autor:
Tatiana I Maslova, Sergey V Serdiukov, Ekaterina А Volegova, Martin Albrecht, Michal Ulvr, Stuart Harmon, Jian He
Publikováno v:
Metrologia. 60:01004
Main text The COOMET.EM-S26 (1715) supplementary comparison of national standard instruments in the field of magnetic flux density and magnetic flux measurements by sensing coils has been organized within the CCEM framework to test the abilities of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a40e8454905bb2633077e20c74b05ab5
https://doi.org/10.1088/0026-1394/60/1a/01004
https://doi.org/10.1088/0026-1394/60/1a/01004
Publikováno v:
I2MTC
The first part of this paper deals with the influence of burden accuracy on the errors of current and voltage instrument transformers. The requirement stated in the prepared standard, corresponding to a tolerance of burden value B ± 3 % and power fa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8871784098d9903f6d05aee87fb8f184
https://doi.org/10.1109/i2mtc43012.2020.9128565
https://doi.org/10.1109/i2mtc43012.2020.9128565
Autor:
Michal Ulvr, Josef Kupec
Publikováno v:
Journal of Electrical Engineering. 69:435-437
The low-μ indicator is used for testing the relative magnetic permeability of weights. This paper presents a simple method for verifying the Low-Mu indicator standard inserts value, using a simulation of the weights by a coil standard of magnetic fl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d7276acc4f5415a3272ac305e6be0f0
https://doi.org/10.2478/jee-2018-0068
https://doi.org/10.2478/jee-2018-0068
Autor:
Michal Ulvr, Jakub Polonský
Publikováno v:
Journal of Electrical Engineering. 68:216-219
AC magnetic field analyzers with a triaxial coil probe are widely used by health and safety professionals, in manufacturing, and in service industries. For traceable calibration of these analyzers, it is important to be able to generate a stable, hom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f891ef9b7e4c82de037033298e56c85a
https://doi.org/10.1515/jee-2017-0032
https://doi.org/10.1515/jee-2017-0032
A calibration procedure for calibrations of triaxial magnetometers is presented. The procedure uses a triaxial Helmholtz coil system and an Overhauser scalar magnetometer and is performed in the Earth's field range. The triaxial coils are first calib
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::698c9c30cc32dfcfc73d3d925b508d00
Autor:
Michal Ulvr
It was the near‑end of the Second World War, which defined the popular reception of the Atomic bomb for upcoming decade. In the first year of the nuclear monopoly, the feeling of uncertainty and fear of death in the nuclear war was not yet present
Autor:
Petr Klapetek, Gaoliang Dai, Michal Ulvr, Volker Neu, Craig Barton, Sibylle Sievers, Marek Havlicek, Yuanjun Tang, Alexander Fernández-Scarioni, Robert Puttock, Héctor Corte-León, Xiukun Hu, Hans Werner Schumacher, David Nečas, Olga Kazakova
Publikováno v:
Journal of Magnetism and Magnetic Materials. 511:166947
Magnetic force microscopy (MFM) can be considered as a standard tool for nano-scale investigation of magnetic domain structures by probing the local stray magnetic field landscape of the measured sample. However, this generally provides only qualitat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a87ea00e4f3647c2648fbe511b650c6a
https://doi.org/10.1016/j.jmmm.2020.166947
https://doi.org/10.1016/j.jmmm.2020.166947
Autor:
Michal Ulvr
Publikováno v:
2018 Conference on Precision Electromagnetic Measurements (CPEM 2018).
The frequency dependence of the constant of the coil magnetic flux density standard is needed in order to generate the AC magnetic flux density with precision. This paper presents an analysis of methods that can be used for calibration of the frequen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c060ac0c289c9b02b0d67b825b6709a5
https://doi.org/10.1109/cpem.2018.8500823
https://doi.org/10.1109/cpem.2018.8500823
Autor:
Josef Kupec, Michal Ulvr
Publikováno v:
2017 IEEE International Magnetics Conference (INTERMAG).
Nuclear magnetic resonance (NMR) is a very important technique for making accurate measurements of the magnetic flux density B of dc magnetic fields in a wide range of values. This paper presents improvements to the NMR method with flowing water (the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::427763cd423adb26be6e47b7608c3e04
https://doi.org/10.1109/intmag.2017.8007646
https://doi.org/10.1109/intmag.2017.8007646