A study of index step sizes for varing coil diameters and their effects on throughput and probability of detection (POD) for improved automated eddy current inspections on aerospace engine-components

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A study of index step sizes for varing coil diameters and their effects on throughput and probability of detection (POD) for improved automated eddy current inspections on aerospace engine-components

Ko, R.T. / Petricola, D.L. / Berens, A.P. / Rambo, M.

The effect of index distance and coil size on eddy-current inspection throughput rate, and resulting POD, are being examined using the Eddy Current Inspection System (ECIS) developed under the USAFs Retirement for Cause (RFC) program. The index size (distance between adjacent scan lines) is typically set to a small fraction of the coil diameter. For USAF engine inspections, the index size was fixed in the early 1980s to be 0.010-inch, based on the coil size in use at that time. The inspection throughput rate could be increased by enlarging the index size with a possible associated increase in coil size, but the effect on POD is unknown. A systematic approach was examined by first determining a large index, followed by a reliability study for POD results and then a part inspection for throughput comparison. Results of increasing index size and their POD curves were compared with those from the regular index sizes. The scatter of the POD results with increasing index sizes in this study falls within those normally acceptable variation ranges in repeated ECIS inspections. The part inspection, using the threshold from the POD analysis, also shows similar inspection results. A reduction of inspection time with increased index size was observed. The results in this study suggest that a throughput increase of inspection could be achieved without adversely affecting the acceptable POD results.

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Titel :

A study of index step sizes for varing coil diameters and their effects on throughput and probability of detection (POD) for improved automated eddy current inspections on aerospace engine-components

Weitere Titelangaben:

Untersuchung der Anzeigegrößenstufungen für verschiedene Spulendurchmesser und ihr Einfluss auf Durchsatz und Nachweiswahrscheinlichkeit (POD) zur verbesserten automatischen Wirbelstromprüfung von Luftfahrt-Maschinenteilen

Beteiligte:

Ko, R.T. (Autor:in) / Petricola, D.L. (Autor:in) / Berens, A.P. (Autor:in) / Rambo, M. (Autor:in)

Erschienen in:

WCNDT, World Conference on Nondestructive Testing, 16 ; 1-7

Erscheinungsdatum :

2004

Format / Umfang :

7 Seiten, 8 Bilder, 1 Tabelle, 3 Quellen

Anmerkungen:

(Nicht paginiert)

Medientyp :

Aufsatz (Konferenz)

Format :

Datenträger

Sprache :

Englisch

Schlagwörter :

zerstörungsfreie Prüfung , Wirbelstromprüfung , elektrische Spule , Durchmesser , Einflussfaktor , Durchsatzzahl , Nachweiswahrscheinlichkeit , Fehlernachweis , automatische Prüfung , Raumfahrtindustrie , Motorteil

A study of index step sizes for varing coil diameters and their effects on throughput and probability of detection (POD) for improved automated eddy current inspections on aerospace engine-components

A study of index step sizes for varing coil diameters and their effects on throughput and probability of detection (POD) for improved automated eddy current inspections on aerospace engine-components

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