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An Update on Automatic Positioning, Inspection, and Signal Processing Techniques in the RFC/NDE Inspection System

  • Ray T. Ko
  • Wally C. Hoppe
  • David A. Stubbs
  • Donald L. Birx
  • Bob Olding
  • Gary Williams
Conference paper
Part of the Review of Progress in Quantitative Nondestructive Evaluation book series (RPQN, volume 6 A)

Abstract

This paper updates several techniques developed for the Retirement For Cause (RFC) Nondestructive Evaluation (NDE) Inspection System eddy current inspection module. Techniques to be discussed include:
  1. 1.

    Scallop Centering — development of an automatic scallop centering routine makes scallop inspections reliable.

     
  2. 2.

    Soft Survey Mode — improvements have been made for fast peak detection.

     
  3. 3.

    Method 2 Select Mode — a fine flaw detection technique based on the acquired waveform.

     
  4. 4.

    Antirotation Window Inspection — a frequency select mode has been established for detecting flaws in antirotation windows.

     
  5. 2.

    Scaling of Flaw Depth — a scaling factor has been developed, based on Phase I Reliability Test data, which converts flaw signal amplitude into estimated flaw depth.

     

Keywords

Inspection System Survey Mode Flaw Depth Fast Fourier Trans Eddy Current Probe 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Reference

  1. 1.
    Wally Hoppe and Dave Stubbs, “Automatic Eddy Current Inspection of Antirotation Windows in F100 Engine Compressor Air Seals”, in Review of Progress in Quantitative Nondestructive Evaluation, 4, D. O. Thompson and D. E. Chimenti, eds., (Plenum Press, New York, 1985 ).Google Scholar

Copyright information

© Springer Science+Business Media New York 1987

Authors and Affiliations

  • Ray T. Ko
    • 1
  • Wally C. Hoppe
    • 1
  • David A. Stubbs
    • 1
  • Donald L. Birx
    • 1
  • Bob Olding
    • 1
  • Gary Williams
    • 1
  1. 1.NDE Systems DivisionSystems Research Laboratories, Inc.DaytonUSA

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