Numerical simulations for long range guided waves nondestructive testing by a wavelet based two port equivalent

  • Authors:

  • F. Bertoncini;A. Musolino;M. Raugi;F. Turcu

  • Affiliations:

  • Department of Electric Systems and Automation, University of Pisa, Pisa, Italy;Department of Electric Systems and Automation, University of Pisa, Pisa, Italy;Department of Electric Systems and Automation, University of Pisa, Pisa, Italy;Department of Electric Systems and Automation, University of Pisa, Pisa, Italy

  • Venue:
  • ISTASC'05 Proceedings of the 5th WSEAS/IASME International Conference on Systems Theory and Scientific Computation
  • Year:
  • 2005

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Abstract

In this paper the effectiveness of a procedure that allows the detection of a defect by the analysis of parameters of a two port equivalent of a NDT ultrasound guided waves system is investigated. A wavelet expansion of the input (transmitted) and output (reflected) signals has been carried out and a constant coefficient matrix behaving as a transfer function between the input and output port has been defined. The two port equivalent representation correctly simulates the complete system under a wide range of input waveforms in the actual operating condition. The effectiveness of this method to detect and locate defects in the pipes has been investigated.