Publication result detail

Characterisation of Acoustic and Electromagnetic Emission Sources

KOKTAVÝ, P., PAVELKA, J., ŠIKULA, J.

Original Title

Characterisation of Acoustic and Electromagnetic Emission Sources

English Title

Characterisation of Acoustic and Electromagnetic Emission Sources

Type

Paper in proceedings (conference paper)

Original Abstract

Cracks creation is accompanied by electric charge redistribution due to loosen chemical bonds. 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 analysi was performed in frequency band up to 5 MHz.

English abstract

Cracks creation is accompanied by electric charge redistribution due to loosen chemical bonds. 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 analysi was performed in frequency band up to 5 MHz.

Keywords

acoustic emission

Key words in English

acoustic emission

Authors

KOKTAVÝ, P., PAVELKA, J., ŠIKULA, J.

Released

01.01.2003

Publisher

Brno University of Technology

Location

Prague

ISBN

80-214-2475-3

Book

NDT in Progress

Pages from

129

Pages count

8

BibTex

@inproceedings{BUT9390,
  author="Pavel {Koktavý} and Jan {Pavelka} and Josef {Šikula}",
  title="Characterisation of Acoustic and Electromagnetic Emission Sources",
  booktitle="NDT in Progress",
  year="2003",
  pages="8",
  publisher="Brno University of Technology",
  address="Prague",
  isbn="80-214-2475-3"
}