NDT.net - February 2003, Vol. 8 No.2

THE INVESTIGATION OF DEEP PENETRATING HIGH RESOLUTION EC PROBES FOR SUBSURFACE FLAW DETECTION AND SIZING

Valentin Uchanin
Leotest Medium Center PhMI, Generala Gritzaja str. 11\5, Lviv 79017, Ukraine
leotest@org.lviv.net,
Gerhard Mook
Otto von Guericke University, P.O. Box 4120, D-39016, Magdeburg, Germany
mook@mb.uni-magdeburg.de,
Tadeusz Stepinski
Uppsala University, Signals and System, P.O.Box 528, SE-751 20 Uppsala, Sweden
ts@signal.uu.se
Paper presented at the 8th ECNDT, Barcelona, June 2002

Abstract

Introduction

Multidifferential LEOTEST type low frequency EC probes

Detection of prolonged subsurface flaws

Detection of local subsurface flaws

Flaw parameters estimation ability

Applications

Conclusions

References

  1. V. Uchanin, “New Type multidifferential Eddy Current Probes for Surface and Subsurface Flaw Detection”, Zeszyty Problemowe. Badania nieniszczace, Warsaw, 6, 2001, pp. 201-204 (see also: www.usndt.com.ua).
  2. V. Uchanin, V. Tsirg, “The experience of low-frequency eddy current device application for hidden fatigue and corrosion flaw detection”, The Technical Diagnostics and Nondestructive Testing, 4, 1989, pp. 71 - 75 (in Russian).
  3. V.Uchanin, V. Tsirg, “The detection of hidden corrosion damages in aircraft constructions by eddy current method application”, “Physico-chemical mechanics of materials”, 4, 1990, pp.103 – 104 (in Russian).
  4. V. Uchanin, Ju. Grabskij, “Eddy current transducer”, patent certificate 1767409, Bulletin of inventions, Moscow, 37, 1992 (in Russian).
  5. G. Mook, H. Bauke, V.Uchanin, “Wirbelstromprüfung mit hohen Eindringtiefen –Theorie und Praxis”, Conf. DACH-Tagung der DGZfP, ÖGfZP und SGZP, 2000, Innsbruck, BB 73 Band1, pp. 145-154.
  6. F. Forster, “Eddy current testing systems with means to compensate for probe to workpeace spacing”, Patent 3611120 USA, G 01 r 33/12, 1971.
  7. J.-L. Arnaud, M. Floret, “Procede et dispositif pour l’examen non destructif de junctions rivetees ou analogues au mouyen d’une sonde a courants de Foucault“, Patent 2541772 France, G 01 N 27/90, 1983.
  8. R. Becker, M. Disque. Neue Anwendungsfelder der Wirbelstrompüfung durch Einsatz einer Prüfelektronik mit großer Signaldynamik und eines Digitalen Signalprozessors (DSP) mit hoher Rechenleistung, DGzfP DACH-Jahrestagung 1996, Lindau 13.-15. Mai 1996, Vortrag 42; Berichtsband 52.1, pp. 365-372.
  9. G. Mook, V.Uchanin, “The visualization of nondestructive eddy current testing results”, Physical methods and means for media, material and product testing, Leotest Medium Center, Lviv, 2000, Vol. 5, pp. 9 – 16 (in Russian).
  10. T. Stepinski, “Deep Penetrating Eddy Current for Detection Voids in Copper”, to be presented at 8th ECNDT, Barcelona, June 2002.
  11. V. Uchanin, “The methods of quantitative eddy current testing with flaw parameters estimation”, Technical Diagnostics and Nondestructive Testing, Kiev, 1, 2002 (in Russian).
  12. V. Uchanin, “The distribution of the electromagnetic field above inclined crack and their parameters estimation”, 2 nd Int conf. Computer Methods and Inverse Problems in Nondestructive Testing and Diagnostics, Minsk, 1998, pp.139 - 144.

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