NDT.net - October 2000, Vol. 5 No. 10

Forging ahead with the Ultrasonic Inspections of castings

P.Rubbers
Technology Services International
Lower Germiston road
Cleveland 2022
Gauteng, South Africa
Corresponding Author Contact:
Email: Philippe.Rubbers@eskom.co.za

2nd International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components, New Orleans May 2000.
TABLE OF CONTENTS

Abstract

Introduction

Frequency domain information

Extracting phase information

Complex plane split spectrum processing (CSSP)

Implementation of CSSP technique

Validation of CSSP

Conclusion

References

  1. " Split spectrum processing: optimising the process parameters using minimisation." P.Karpur, P.M. Sankar J.L.Rose and V.L.Newhouse, Ultrasonics, July 1987, Vol25, p. 204. [magazine article]
  2. " Split spectrum processing: a new filtering approach for improved signal-to-noise ratio enhansment of ultrasonic signals." P.Karpur, O.J.Canelones, Ultrasonics, May 1992, Vol30, No6, p. 351. [magazine article]
  3. " Split-spectrum processing: Analysis of polarity thresholding for improvement of signal-to-noise ratio and detectability in ultrasonic signals." P.M.Shankar, P.Karpur, V.L.Newhouse,J.L.Rose, IEEE transaction on ultrasonics, ferroelectrics, and frequency control, January 1989, Vol36, No1, p. 101. [report]
  4. " Split-spectrum processing with finite impulse response filters of constant frequency-to-bandwidth ratio." J.D.Aussel, Ultrasonics, July 1990, Vol28, p. 229. [magazine article]
  5. " Split spectrum algorithms rely on instantaneous phase information - a geometrical approach." M.G.Gustafsson, T.Stepinski, IEEE transaction on ultrasonics, ferroelectrics, and frequency control, November 1993, Vol40, No6, p. 659. [report]
  6. " Non-Linear Free Vibrations Identification via the Hilbert Transform." M. Feldman, Journal of Sound and Vibration, December 1997, Vol208, No 3,pg 475. [report]
  7. " Features of a combined FFT and Hilbert transform for Doppler signal processing." P.Lehmann, H Schombacher, Measurment Science and Technology, April 1997, Vol8, No4, pg 409. [report]
  8. " Signal processing ultrasonic testing system (SPUTS) using split spectrum processing algorithms" P.Rubbers, 2nd Int conference on NDE in relation to structural integrity for nuclear and pressurised components, EPRI, May 2000.

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