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Local magnetization unit for GMR array based magnetic flux leakage inspection

  • GMR sensors are increasingly used for magnetic surface inspection due to their high sensitivity and high spatial resolution. In case of simple planar or cylindrical shaped components, the GMR-based inspection procedure can be automated easily. We present GMR measurements of real fatigue cracks. In addition, we present a probe design using a local magnetization unit and commercially available GMR sensors. The design was carried out by means of finite-element method (FEM) simulations. Using the local probe we measured bearings containing artificial reference cracks of different depths and orientations. Cracks with a depth of 40 µm could be resolved with a signal-to-noise ratio better than 6. A further reduction of the measuring time can be obtained using a sensor array. For this purpose we present a study of the optimized size of the sensing GMR-layers for a NDE-adapted sensor array. The geometric sensor parameters were investigated through simulations of the magnetic flux leakage ofGMR sensors are increasingly used for magnetic surface inspection due to their high sensitivity and high spatial resolution. In case of simple planar or cylindrical shaped components, the GMR-based inspection procedure can be automated easily. We present GMR measurements of real fatigue cracks. In addition, we present a probe design using a local magnetization unit and commercially available GMR sensors. The design was carried out by means of finite-element method (FEM) simulations. Using the local probe we measured bearings containing artificial reference cracks of different depths and orientations. Cracks with a depth of 40 µm could be resolved with a signal-to-noise ratio better than 6. A further reduction of the measuring time can be obtained using a sensor array. For this purpose we present a study of the optimized size of the sensing GMR-layers for a NDE-adapted sensor array. The geometric sensor parameters were investigated through simulations of the magnetic flux leakage of surface cracks using an analytic model.zeige mehrzeige weniger

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Metadaten
Autor*innen:Matthias Pelkner, Andreas Neubauer, Verena Reimund, Marc Kreutzbruck
Persönliche Herausgeber*innen:D. O. Thompson, D. E. Chimenti
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Review of progress in quantitative nondestructive evaluation, volume 31
Jahr der Erstveröffentlichung:2012
Herausgeber (Institution):Iowa State University
Verlag:American Institute of Physics
Verlagsort:Melville, NY
Ausgabe/Heft:1430
Erste Seite:1005
Letzte Seite:1012
Freie Schlagwörter:GMR; Magnetic flux leakage; NDE; Sensor array
Veranstaltung:38th Annual Review of Progress in Quantitative Nondestructive Evaluation
Veranstaltungsort:Burlington, VT, USA
Beginndatum der Veranstaltung:2011-07-17
Enddatum der Veranstaltung:2011-07-22
DOI:10.1063/1.4716332
ISSN:0743-0760
ISSN:0094-243X
ISBN:978-0-7354-1013-8
Bemerkung:
Serientitel: AIP conference proceedings – Series title: AIP conference proceedings
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:Ja
Datum der Eintragung als referierte Publikation:28.06.2012
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