Flying laser spot thermography for the fast detection of surface breaking cracks
- We report on recent developments in the detection of surface breaking cracks using flying laser spot thermography. Application of an infrared camera for mapping the thermal radiation after excitation with a diode laser equipped with an optical scanner allows us to examine a surface containing cracks in an entirely non-destructive, contactless and fast way, without even moving the camera. We developed an efficient and robust algorithm that can be applied directly to the recorded thermal sequences, and that derives a single image containing all crack signatures. For this crack detection technique, no specific synchronisation between laser and camera is required. Hence, our approach is suitable for an upgrade of existing thermographic systems. The feasibility of the proposed procedure is proven by testing an artificial test sample and a piece of rail that comprises roll contact fatigue cracks and by comparing the results with magnetic particle testing.
Autor*innen: | Joachim Schlichting, Mathias ZieglerORCiD, Christiane MaierhoferORCiD, Marc Kreutzbruck |
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Dokumenttyp: | Beitrag zu einem Tagungsband |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | 18th WCNDT - World conference on nondestructive testing (Proceedings) |
Jahr der Erstveröffentlichung: | 2012 |
Erste Seite: | 1 |
Letzte Seite: | 7 (Paper 499) |
Freie Schlagwörter: | Cracks; Flying spot; Laser; Thermography |
Veranstaltung: | 18th WCNDT - World conference on nondestructive testing |
Veranstaltungsort: | Durban, South Africa |
Beginndatum der Veranstaltung: | 2012-04-16 |
Enddatum der Veranstaltung: | 2012-04-20 |
ISBN: | 978-0-620-52872-6 |
Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
Datum der Freischaltung: | 19.02.2016 |
Referierte Publikation: | Nein |