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Project detail
Duration: 01.01.1997 — 31.12.1999
Funding resources
Czech Science Foundation - Standardní projekty
- whole funder
On the project
Description in EnglishThe aim of the project consists in a refmement of existing models of electromagnetic emission whixh occurs in solids when cracks are formed and to set forth its applications in civil engineering and geophysics. The basic problem consists in finding the recording threshold for the electric, magnetic and electromagnetic field components. To this end a low noise preamplifier will be implemented which will allow noise level signals to be amplified. Furthermore, an apparatus will be designed to separate theelectromagnetic emission signals from random voltages in the electronic setup. A problem to solve consists in a decision whether the capacitor antenna detects the true electromagnetic field or a mere electric charge redistribution. Another problem is whether the low frequency signal relaxation is due to the dipole moment drop in time or the electric charge being driven away from the crack. Therefore, an experimental study of the effect of humidity on the low fiequency signal relaxation time will be car
Mark
GA103/97/0899
Default language
Czech
People responsible
Šikula Josef, prof. Ing. RNDr., DrSc. - principal person responsible
Units
Department of Physics- (1997-01-01 - not assigned)
Results
ŠIKULA, J. Chybí název. In XI.mezinárodní vědecká konference VUT - sekce Aplikovaná fyz. Brno: Fakulta stavební VUT v Brně, 1999. p. 5 ( p.)ISBN: 80-214-143.Detail
ŠIKULA, J. Chybí název. In DEFEKTOSKOPIE 99. Hradec Králové: Česká společnost pro nedestruktivní testování, 1999. p. 67 ( p.)ISBN: 80-01-0195.Detail
ŠIKULA, J. Chybí název. In Acoustic Emission 99. Brno: VUT Brno, 1999. p. 253 ( p.)ISBN: 80-214-130.Detail
ŠIKULA, J. Chybí název. In Acoustic Emission 99. Brno: VUT Brno, 1999. p. 259 ( p.)ISBN: 80-214-130.Detail
KOŘENSKÁ, M., ŠIKULA, J., VAŠINA, P. Threshold sensitivity and background noise of acoustic emission sensors. In Acoustic Emission Testing. Vídeň: TUV Austria, 1998. p. 255 ( p.)Detail
ŠIKULA, J.; KOKTAVÝ, B.; PAVELKA, J.; ROČAK, D.; BELAVIČ, D.; TACANO, M. Low Frequency Noise of Thick Conducting Films. In Proc. of 15th Int. Conf. on Noise in Physical Systems and 1/f Fluctuations ICNF, Hong Kong August 1999, ed. C. Surya. Hong Kong: Bentham Press, 1999. p. 154-157. ISBN: 1-874612-28-5.Detail
MELKES, F. Combined Finite Volume-Element Method. In COMPUMAG, Twelfth Conference of the Computation of electromagnetic fields. Sapporo, Japan: 1999. p. 570 ( p.)Detail
ŠIKULA, J., KOKTAVÝ, B., KOŠÍKOVÁ, I., PAVELKA, J., LOKAJÍČEK, T. Electromagnetic Emission From Polycrystalline Solids. In Proceedings of International Conference Acoustic Emission '99. Brno: VUT Brno, 1999. p. 259 ( p.)ISBN: 80-214-1303-4.Detail
ŠIKULA, J.; KOKTAVÝ, B.; KOKTAVÝ, P.; PAVELKA, J.; ROČAK, D.; BELAVIČ, D. Nonlinearity and noise of thick film resistors as reliability indicators. In Proceedings of 12th European Passive Components Symposium CARTS-Europe '98. UK: Electronic Components Institute Internationale Ltd., 1998. p. 56 ( p.)Detail
BELAVIČ, D.; ROČAK, D.; ŠIKULA, J.; HROVAT, M.; KOKTAVÝ, B.; PAVELKA, J. Investigation of a possible correlation between current noise and long-term stability of thick-film resistors. In Proc. European Microelectronics, Packaging and Interconnection Symposium. Praha: IMAPS, 2000. p. 464 ( p.)ISBN: 80-238-5509-3.Detail
ŠIKULA, J.; PAVELKA, J.; ROČAK, D.; BELAVIČ, D. Low Frequency Noise in Film Resistors. In AIP Conference Proceedings 466. USA: AIP, 1998. p. 42-47. ISBN: 1-56396-854-1.Detail
KOŘENSKÁ, M., ŠIKULA, J. Statistical parameters of the acoustic emission signals. In Research Activities of Physical Departments of Civil Enginee. Brno: Vysoké učení technické v Brně, 1998. p. 61 ( p.)ISBN: 80-214-114.Detail