Size adapted GMR arrays for the automated inspection of surface breaking cracks in roller bearings
- Their small size together with a remarkable field sensitivity are the most prominent features of present-day GMR sensors paving the way for various applications in automated non-destructive testing (NDT). This work presents a prototype for fast and automated magnetic testing of roller bearings. A local magnetization unit excites the magnetic field inside the bearing. As a result of a design study and the following wafer fabrication the probe was equipped with NDT-adapted GMR sensor arrays in which 48 elements measures the field response. The detection of artificial and 40 µm deep defects could be resolved with a SNR better than 20 dB. In addition, we report of first results of a POD (Probability of Detection) analysis using GMR sensors to investigate bearings with EDM (electronic discharge machining) notches having depths down to 10 µm. Finally, we estimate successfully the depth of a 57 µm notch from the measured data.
Autor*innen: | Matthias Pelkner, Verena Reimund, Thomas Erthner, Marc Kreutzbruck |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | International journal of applied electromagnetics and mechanics |
Jahr der Erstveröffentlichung: | 2014 |
Verlag: | IOS Press |
Verlagsort: | Amsterdam, The Netherlands |
Jahrgang/Band: | 45 |
Ausgabe/Heft: | 1-4 |
Erste Seite: | 473 |
Letzte Seite: | 479 |
Freie Schlagwörter: | Giant magneto resistance; Magnetic flux leakage; Non-destructive testing; Sensor array |
DOI: | 10.3233/JAE-141866 |
ISSN: | 1383-5416 |
ISSN: | 0925-2096 |
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 |