Cracks Detection by Electromagnetic Emission

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F02%3APU30672" target="_blank" >RIV/00216305:26220/02:PU30672 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Cracks Detection by Electromagnetic Emission

Popis výsledku v původním jazyce

The phenomenon of electromagnetic emission (EME) from solids is based on the generation of electromagnetic field resulting from mechanical excitation of the solid in question. This phenomenon may be induced by external pressure, bending or shear stress,knock, friction, etc. When mechanical stress is applied to a solid, there arise cracks and a redistribution of electric charge takes place. The crack faces are charged with opposite charges thus forming a time variable electric dipole or an electric doubble-layer. Hence they become sources of an electromagnetic field, which may be detected in the vicinity of the solid in question by means of appropriate sensors. The recorded electric signal is superposition of crack walls ?self? vibration given by cracklength and vibration due to an ultrasonic wave given by sample dimensions. The electromagnetic signal precedes the acoustic emission (AE) response and time delay corresponds to the difference of propagation velocities of sound and electr

Název v anglickém jazyce

Cracks Detection by Electromagnetic Emission

Popis výsledku anglicky

The phenomenon of electromagnetic emission (EME) from solids is based on the generation of electromagnetic field resulting from mechanical excitation of the solid in question. This phenomenon may be induced by external pressure, bending or shear stress,knock, friction, etc. When mechanical stress is applied to a solid, there arise cracks and a redistribution of electric charge takes place. The crack faces are charged with opposite charges thus forming a time variable electric dipole or an electric doubble-layer. Hence they become sources of an electromagnetic field, which may be detected in the vicinity of the solid in question by means of appropriate sensors. The recorded electric signal is superposition of crack walls ?self? vibration given by cracklength and vibration due to an ultrasonic wave given by sample dimensions. The electromagnetic signal precedes the acoustic emission (AE) response and time delay corresponds to the difference of propagation velocities of sound and electr

Druh

D - Stať ve sborníku

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/GP102%2F02%2FD073" target="_blank" >GP102/02/D073: Detekce trhlin v pevných látkách pomocí elektromagnetické emise</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2002

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Electronic Devices and Systems 02 - Proceedings, Experimental Methods in Acoustic and Electromagnetic Emission

ISBN

80-214-2180-0

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

82-89

Název nakladatele

Ing. Zdeněk Novotný, CSc.

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

9. 9. 2002

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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