Detail publikačního výsledku

Acoustic and electromagnetic emission sources characterization

ŠIKULA, J., PAVELKA, J., KOKTAVÝ, P., MAJZNER, J.

Originální název

Acoustic and electromagnetic emission sources characterization

Anglický název

Acoustic and electromagnetic emission sources characterization

Druh

Stať ve sborníku v databázi WoS či Scopus

Originální abstrakt

Cracks creation is accompanied by emission of phonons and by electric charge redistribution due to chemical bonds loosen. Sample dimensions and velocity of wave propagation determine vibration frequencies. Electric charges on crack walls create a dipole momentum and crack wall vibrations produce time dependent electric and magnetic fields. An electric signal is induced on metal electrodes and after its analysis is carried out information on the crack wall movement can be obtained. For crack lengths below 1 mm the respective electrical signal has a frequency of over 2 MHz. In this paper the frequency analysis was performed in frequency band up to 2 MHz.

Anglický abstrakt

Cracks creation is accompanied by emission of phonons and by electric charge redistribution due to chemical bonds loosen. Sample dimensions and velocity of wave propagation determine vibration frequencies. Electric charges on crack walls create a dipole momentum and crack wall vibrations produce time dependent electric and magnetic fields. An electric signal is induced on metal electrodes and after its analysis is carried out information on the crack wall movement can be obtained. For crack lengths below 1 mm the respective electrical signal has a frequency of over 2 MHz. In this paper the frequency analysis was performed in frequency band up to 2 MHz.

Klíčová slova

acoustic, electromagnetic, emission, sources characterisation

Klíčová slova v angličtině

acoustic, electromagnetic, emission, sources characterisation

Autoři

ŠIKULA, J., PAVELKA, J., KOKTAVÝ, P., MAJZNER, J.

Vydáno

01.01.2003

Nakladatel

Technical University of Brno

Místo

Brno

ISBN

80-7204-318-8

Kniha

Workshop NDT CMC 2003 - Non-Destructive Testing of Civil Materials and Constructions - Proceedings

Strany od

151

Strany počet

6

BibTex

@inproceedings{BUT9247,
  author="Josef {Šikula} and Jan {Pavelka} and Pavel {Koktavý} and Jiří {Majzner}",
  title="Acoustic and electromagnetic emission sources characterization",
  booktitle="Workshop NDT CMC 2003 - Non-Destructive Testing of Civil Materials and Constructions - Proceedings",
  year="2003",
  number="1",
  pages="6",
  publisher="Technical University of Brno",
  address="Brno",
  isbn="80-7204-318-8"
}