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Statements

Subject Item
n2:RIV%2F00216305%3A26220%2F05%3APU51473%21RIV06-GA0-26220___
rdf:type
n9:Vysledek skos:Concept
dcterms:description
Partial discharges occur when voltage applied to insulating sheets reaches a critical value which is characteristic for given insulator. The partial discharges are accompanied by acoustic emission events. The acoustic emission signal is measured by a piezoceramic sensor and partial discharges are detected by means of voltage pulses on a load resistance. While a spike of a partial discharge appears immediately, an acoustic event signal is delayed. The time interval depends on the distance of the place whhere partial discharge is created and the wave velocity propagation of an acoustic emission signal. The position of PD source can be estimated for a two channel measuring setup with two AE sensors. The proposed testing method can be used to obtain information on voids, cracks or air bubbles in metal-insulator-metal structures. Partial discharges occur when voltage applied to insulating sheets reaches a critical value which is characteristic for given insulator. The partial discharges are accompanied by acoustic emission events. The acoustic emission signal is measured by a piezoceramic sensor and partial discharges are detected by means of voltage pulses on a load resistance. While a spike of a partial discharge appears immediately, an acoustic event signal is delayed. The time interval depends on the distance of the place whhere partial discharge is created and the wave velocity propagation of an acoustic emission signal. The position of PD source can be estimated for a two channel measuring setup with two AE sensors. The proposed testing method can be used to obtain information on voids, cracks or air bubbles in metal-insulator-metal structures. Partial discharges occur when voltage applied to insulating sheets reaches a critical value which is characteristic for given insulator. The partial discharges are accompanied by acoustic emission events. The acoustic emission signal is measured by a piezoceramic sensor and partial discharges are detected by means of voltage pulses on a load resistance. While a spike of a partial discharge appears immediately, an acoustic event signal is delayed. The time interval depends on the distance of the place whhere partial discharge is created and the wave velocity propagation of an acoustic emission signal. The position of PD source can be estimated for a two channel measuring setup with two AE sensors. The proposed testing method can be used to obtain information on voids, cracks or air bubbles in metal-insulator-metal structures.
dcterms:title
Partial Discharges and Acoustic Emission In Insulating Materials Částečné výboje a akustická emise v izolantech Partial Discharges and Acoustic Emission In Insulating Materials
skos:prefLabel
Částečné výboje a akustická emise v izolantech Partial Discharges and Acoustic Emission In Insulating Materials Partial Discharges and Acoustic Emission In Insulating Materials
skos:notation
RIV/00216305:26220/05:PU51473!RIV06-GA0-26220___
n4:strany
153-158
n4:aktivita
n22:Z n22:P
n4:aktivity
P(GA102/03/0621), P(GA205/03/0071), P(GP102/02/D073), Z(MSM0021630503)
n4:dodaniDat
n10:2006
n4:domaciTvurceVysledku
n6:9458670 n6:9770690 n6:3502465
n4:druhVysledku
n13:D
n4:duvernostUdaju
n20:S
n4:entitaPredkladatele
n19:predkladatel
n4:idSjednocenehoVysledku
535455
n4:idVysledku
RIV/00216305:26220/05:PU51473
n4:jazykVysledku
n7:eng
n4:klicovaSlova
partial discharges, acoustic emission, electric charge
n4:klicoveSlovo
n16:acoustic%20emission n16:electric%20charge n16:partial%20discharges
n4:kontrolniKodProRIV
[84BBAECD6A28]
n4:mistoKonaniAkce
Praha
n4:mistoVydani
Průhonice
n4:nazevZdroje
Proceedings of 3rd Workshop NDT in Progress, International Meeting of NDT Experts
n4:obor
n5:BM
n4:pocetDomacichTvurcuVysledku
3
n4:pocetTvurcuVysledku
3
n4:projekt
n12:GA205%2F03%2F0071 n12:GP102%2F02%2FD073 n12:GA102%2F03%2F0621
n4:rokUplatneniVysledku
n10:2005
n4:tvurceVysledku
Šikula, Josef Koktavý, Bohumil Koktavý, Pavel
n4:typAkce
n18:CST
n4:zahajeniAkce
2005-10-10+02:00
n4:zamer
n15:MSM0021630503
s:numberOfPages
6
n14:hasPublisher
Czech Society for Non-destructive Testing
n21:isbn
80-214-2996-8
n17:organizacniJednotka
26220