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Automated inspection of surface breaking cracks using GMR sensor arrays

  • We present a prototype for automated magnetic stray field testing of ferromagnetic roller bearings. For this purpose NDE-adapted GMR sensor arrays (giant magneto resistance) are used for the detection of surface breaking cracks. The sensors are miniaturized down to the lower µm-regime to achieve adequate spatial resolution. In doing so, sensor arrays with up to 48 elements are used to inspect the bearing surface within a few seconds only. In contrast to magnetic particle inspection (MPI), where the global magnetization requires a further inspection step and succeeding demagnetization, the presented prototype only locally magnetize the surface area in the vicinity of the GMR Sensors. For the local magnetization, the applied sub-surface magnetic field was simulated and proofed for detecting flaws with a depth of a few 10 µm. By multiplexing the sensor array with an adapted read out electronics we quasi simultaneously detect the normal field component of about 100µm above the surface. TheWe present a prototype for automated magnetic stray field testing of ferromagnetic roller bearings. For this purpose NDE-adapted GMR sensor arrays (giant magneto resistance) are used for the detection of surface breaking cracks. The sensors are miniaturized down to the lower µm-regime to achieve adequate spatial resolution. In doing so, sensor arrays with up to 48 elements are used to inspect the bearing surface within a few seconds only. In contrast to magnetic particle inspection (MPI), where the global magnetization requires a further inspection step and succeeding demagnetization, the presented prototype only locally magnetize the surface area in the vicinity of the GMR Sensors. For the local magnetization, the applied sub-surface magnetic field was simulated and proofed for detecting flaws with a depth of a few 10 µm. By multiplexing the sensor array with an adapted read out electronics we quasi simultaneously detect the normal field component of about 100µm above the surface. The detection of artificial notches with a depth of 40 µm and more could be resolved with a SNR better than 20 dB. The presented testing facility is fast and provides a step towards automated testing of safety relevant steel components.zeige mehrzeige weniger

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Metadaten
Autor*innen:Matthias Pelkner, Verena Reimund, Thomas Erthner, Nicolai Panke, Marc Kreutzbruck
Persönliche Herausgeber*innen:D.E. Chimenti, L.J. Bond, D.O. Thompson
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):40th Annual review of progress in quantitative nondestructive evaluation (Proceedings)
Jahr der Erstveröffentlichung:2014
Herausgeber (Institution):American institute of physics (AIP)
Verlag:AIP Publishing
Jahrgang/Band:1581 33B
Erste Seite:1393
Letzte Seite:1399
Freie Schlagwörter:GMR; Magnetic flux leakage; Non-destructive testing; Sensor array
Veranstaltung:40th Annual review of progress in quantitative nondestructive evaluation
Veranstaltungsort:Baltimore, Maryland, USA
Beginndatum der Veranstaltung:2013-07-21
Enddatum der Veranstaltung:2013-07-26
DOI:10.1063/1.4864984
ISSN:0094-243X
ISBN:978-0-7354-1212-5
ISBN:978-0-7354-1211-8
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:20.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:01.09.2014
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