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Description
  • Generation of crack is accompanied by generation of electric charges on the crack walls. This charge can be measured by a capacitance antenna. When a micro-crack is generated in a solid the faces of the crack make up plates of an elementary capacitor and the charges located on them constitute an electric dipole or quadrupole. The magnitude of the electric charge configuration depends on the time. Experimentally we have observed two different type of signals like damped harmonic motion with: (i) exponentially time dependent transient value and (ii) constant average value. we suppose that first one is generated by dipole structure and second one is generated by quadrupole. Using Shockley-Ramo theorem, the differential equation for induced voltage is derived. We found that voltage on measuring capacitor is directly proportional to the electric charge distribution. The recorded electric signal is superposition of crack walls %22self%22 vibration given by crack length and vibration due to an ultrasonic wave gi
  • Generation of crack is accompanied by generation of electric charges on the crack walls. This charge can be measured by a capacitance antenna. When a micro-crack is generated in a solid the faces of the crack make up plates of an elementary capacitor and the charges located on them constitute an electric dipole or quadrupole. The magnitude of the electric charge configuration depends on the time. Experimentally we have observed two different type of signals like damped harmonic motion with: (i) exponentially time dependent transient value and (ii) constant average value. we suppose that first one is generated by dipole structure and second one is generated by quadrupole. Using Shockley-Ramo theorem, the differential equation for induced voltage is derived. We found that voltage on measuring capacitor is directly proportional to the electric charge distribution. The recorded electric signal is superposition of crack walls %22self%22 vibration given by crack length and vibration due to an ultrasonic wave gi (en)
  • Generace trhlin je doprovázena vznikem elektrického náboje na stěnách trhliny. Tento náboj je možné měřit kapacitním snímačem. Uvedeného jevu je možné využít ke studiu vzniku trhlin. (cs)
Title
  • AE sources characterization by electromagnetic and acoustic emission
  • Charakterizace zdrojů akustické emise pomocí elektromagnetické a akustické emise (cs)
  • AE sources characterization by electromagnetic and acoustic emission (en)
skos:prefLabel
  • AE sources characterization by electromagnetic and acoustic emission
  • Charakterizace zdrojů akustické emise pomocí elektromagnetické a akustické emise (cs)
  • AE sources characterization by electromagnetic and acoustic emission (en)
skos:notation
  • RIV/00216305:26220/07:PU70334!RIV08-GA0-26220___
http://linked.open.../vavai/riv/strany
  • 69-72
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA103/06/0708), Z(MSM0021630503)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 408684
http://linked.open...ai/riv/idVysledku
  • RIV/00216305:26220/07:PU70334
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • non-destructive testing, ultrasonic methods, non-linear ultrasonic spectroscopy, acoustic emission, electromagnetic emission, crack, granite (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [6F9ADDFE7060]
http://linked.open...v/mistoKonaniAkce
  • Brno
http://linked.open...i/riv/mistoVydani
  • Brno
http://linked.open...i/riv/nazevZdroje
  • New trends in physics
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Koktavý, Pavel
  • Šikula, Josef
  • Lokajíček, Tomáš
  • Koktavý, Bohumil
http://linked.open...vavai/riv/typAkce
http://linked.open.../riv/zahajeniAkce
http://linked.open...n/vavai/riv/zamer
number of pages
http://purl.org/ne...btex#hasPublisher
  • Ing. Zdeněk Novotný CSc.
https://schema.org/isbn
  • 978-80-7355-078-3
http://localhost/t...ganizacniJednotka
  • 26220
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