NDT.net - October 2002, Vol. 7 No.10

ULTRASONIC SIGNAL PROCESSING ALGORITHMS FOR THE CHARACTERIZATION OF THIN MULTILAYERS

Agostino Abbate, Nguyen Nguyen, Steve LaBreck, Tom Nelligan
Panametrics, Inc. 221 Crescent St., Waltham, MA USA,
Jeffrey B. Carruthers
Electrical & Computer Eng. Dept., Boston University, Boston, MA USA
Corresponding Author Contact:
Email: abbatea@panametrics.com, Internet: www.panametrics-ndt.com
Paper presented at the 8th ECNDT, Barcelona, June 2002

Abstract

Introduction

Mathematical Model of the Ultrasonic Signal

Signal Modeling Algorithm for the Characterization of Multilayers

Discussion of Results

Conclusions

References

  1. Y. Kurihara, K. Makazawa, K. Ohashi, S. Momeo, and K. Numazaki, “Development of Multi-Layer Plastic Fuel Tanks for Nissan Research Vehicle – II,” SAE Technical Paper Series, vol. 0148-7191, 1987, pp. 100-112.
  2. K. Fukuhara, M. Hara, N. Matsuura, and H. Watanabe, “Development of Plastic Fuel Tank Using Modified Multi-Layer Blow Molding,” SAE Technical Paper Series, 1990.
  3. M. Knights, “On-line PET Bottle Thickness Gauging Brings Responsive Process Control,” Plastic Technology, 2001, pp. 32-33.
  4. N. Nulman, G. Mozarkewich, B. Khaykin, “Ultrasonic Thickness Gauge for Multi- layer Plastic Fuel Tanks,” Proc. ANTEC ’99, 1999, pp. 1017-1019.
  5. G.G. Leisk, and A. Saigal, “Digital Computer Algorithms to Calculate Ultrasonic Wave Speeds,” Materials Evaluation, 1996, pp. 840-843.
  6. S. Takeshita, S. Taki, and K. Matsushige, “Applications of two-dimesional spectroscopy to nondestructive inspection,” Materials Evaluation, 1990, pp.1473-1479.
  7. R. Croce, P. Calmon and L. Paradis, “Modeling of propagation and echo formation in a multilayered structure,” Ultrasonics, vol. 38, 2000, pp. 537-541.
  8. C.A. Zala, “High Resolution Inversion of Ultrasonic Traces,” IEEE Trans. Ultras., Ferroel. Freq. Control, vol. 39, n. 4, 1992, pp. 458-463.
  9. L.W. Schmerr, Jr., Fundamentals of Ultrasonic Nondestructive Evaluation. A Modeling Approach, Plenum Press, NY, 1998.
  10. C. Zhu and V.K. Kinra, “A Time-Domain technique for Ultrasonic NDE of Thin Layered Media,” Review of Progress in QNDE, vol. 13, 1994, pp. 165-172
  11. R. Demirli and J. Saniie, “Model-Based Estimation of Ultrasonic Echoes Part I: Analysis and Algorithms,” IEEE Trans. Ultras., Ferroel. Freq. Control, vol. 48, n. 3, 2001, pp. 787-811.
  12. R. Demirli and J. Saniie, “Model-Based Estimation of Ultrasonic Echoes Part I: Analysis and Algorithms,” IEEE Trans. Ultras., Ferroel. Freq. Control, vol. 48, n. 3, 2001, pp. 787-811.

© NDT.net - info@ndt.net |Top|