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High Precision Coating Measurement with Ultrasound

Author: Johannes Büchler, KRAUTKRÄMER GmbH & Co. oHG, D - Hürth
Co-Author: Thorsten Pagel, KRAUTKRÄMER GmbH & Co. oHG, D - Hürth
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1. Abstract

2. Limitations of traditional ultrasonic measurement methods

3. New probe technology

4. Resolution increase with signal processing

5. Reflection model

6. Applications

1. Literature

  1. Krautkrämer, J. u. H., Werkstoffprüfung mit Ultraschall, Springer Verlag Berlin 1986
  2. Platte, M., Ultraschallwandler aus dem piezoelektrischen Hochpolymer Polyvinyldenfluorid, Dissertation RWTH Aachen, 1984
  3. Büchler, J., Platte, M., Schmidt, H., Electronic circuit for high frequency broadband ultrasonic puls-echo operation, Ultrasonics Vol. 25, 1987, S. 112
  4. McRae, K.I., Deconvolution Techniques for Ultrasonic Imaging of Adhesive Joints, Materials Evaluation (1990),1380.
  5. Papoulis, A; Chamzas, C.: Improvement of Range Resolution by Spectral Extrapolation, Ultrasonic Imaging 1,121 (1979).
  6. Levinson, N., The Wiener RMS (Root Mean Square) Error Criterion in Filter Design and Prediction, Journal of Math. Phys. 25,261 (1947).
  7. Schwetlick,. H.; Miyashita, T.; Kessel, W.: Schätzung einer Impulsantwort aus bandbegrenzten Daten, AEÜ 42,160 (1988).
  8. Zala, C.A.: High-Resolution Inversion of Ultrasonic Traces, IEEE Trans. Ultrasonics and Frequency Control 39,458 (1992).
  9. Kreyer, P.; Gut, R.; Moschytz, G.S.: Genaue und automatisierte Schichtdickenmessung mittels Entfaltung von Ultraschall-Laufzeitsignalen, DGZfP Jahrestagung (1996).

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