Eddy-current reflection probes: Theory and experiment

B. A. Auld, J. C. Moulder, S. Jefferies, P. J. Shull, S. Ayter, J. Kenney

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A general ΔZ theory of reflection-type eddy-current probes was recently developed for new types of robotic proximity sensors. In this paper, the theory is applied to the characterization of surface-connected flaws. Flaw signals were calculated using a finite-difference implementation of the ΔZ theory developed at Stanford University. A special air-core eddy-current reflection probe was fabricated at the National Institute of Standards and Technology (NIST) and used to obtain flaw signals for a number of rectangular-shaped electrical-discharge-machined (EDM) notches in aluminum. An automatic impedance analyzer was used to measure flaw signals as the probe was scanned over the length of the flaw. Experimental results were then compared to predictions of the theory.

Original languageEnglish (US)
Pages (from-to)1-11
Number of pages11
JournalResearch in Nondestructive Evaluation
Volume1
Issue number1
DOIs
StatePublished - Mar 1 1989

Fingerprint

Eddy currents
eddy currents
Defects
probes
defects
Experiments
Proximity sensors
notches
robotics
Aluminum
proximity
analyzers
Robotics
impedance
aluminum
sensors
air
Air
predictions

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Auld, B. A., Moulder, J. C., Jefferies, S., Shull, P. J., Ayter, S., & Kenney, J. (1989). Eddy-current reflection probes: Theory and experiment. Research in Nondestructive Evaluation, 1(1), 1-11. https://doi.org/10.1007/BF01607866
Auld, B. A. ; Moulder, J. C. ; Jefferies, S. ; Shull, P. J. ; Ayter, S. ; Kenney, J. / Eddy-current reflection probes : Theory and experiment. In: Research in Nondestructive Evaluation. 1989 ; Vol. 1, No. 1. pp. 1-11.
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Auld, BA, Moulder, JC, Jefferies, S, Shull, PJ, Ayter, S & Kenney, J 1989, 'Eddy-current reflection probes: Theory and experiment', Research in Nondestructive Evaluation, vol. 1, no. 1, pp. 1-11. https://doi.org/10.1007/BF01607866

Eddy-current reflection probes : Theory and experiment. / Auld, B. A.; Moulder, J. C.; Jefferies, S.; Shull, P. J.; Ayter, S.; Kenney, J.

In: Research in Nondestructive Evaluation, Vol. 1, No. 1, 01.03.1989, p. 1-11.

Research output: Contribution to journalArticle

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AU - Auld, B. A.

AU - Moulder, J. C.

AU - Jefferies, S.

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AU - Kenney, J.

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