Cracks Detection by Electromagnetic Emission

Result code in 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>
Result on the web
—
DOI - Digital Object Identifier
—

Result language
angličtina
Original language name
Cracks Detection by Electromagnetic Emission
Original language description
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
Czech name
—
Czech description
—

Project
<a href="/en/project/GP102%2F02%2FD073" target="_blank" >GP102/02/D073: Cracks detection in solids by means of electromagnetic emission</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2002
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Electronic Devices and Systems 02 - Proceedings, Experimental Methods in Acoustic and Electromagnetic Emission
ISBN
80-214-2180-0
ISSN
—
e-ISSN
—
Number of pages
8
Pages from-to
82-89
Publisher name
Ing. Zdeněk Novotný, CSc.
Place of publication
Brno
Event location
Brno
Event date
Sep 9, 2002
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
—

Similar results(10)