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2004
Conference Paper
Titel
Basic principles of acoustic emission tomography
Abstract
The present paper describes the basic principles of acoustic emission tomography. This method uses acoustic emission events as point sources and combines the usual iterative localisation algorithm of acoustic emission testing with algorithms for travel time tomography like ART (algebraic reconstruction technique). The procedure is equivalent to the solution of the generalised inverse localisation problem in locally isotropic heterogeneous media and leads to a new imaging technique where in addition to the source positions the volume of the specimen is visualised in terms of a locally varying wave speed distribution. It is shown by numerically obtained data sets that the algorithm leads to a more accurate localisation of acoustic emission events and offers totally new perspectives for acoustic emission imaging and for acoustic tomography in general.
Language
English