Abstract
The measurement of the time propagation of ultrasonic pulses using techniques based on digital signal processing are now used like the Pulse-overlapping method. In this case there are the methods that use the Cross-Correlation Function (CCF) and Hilbert Transform (HT). However, for the case of viscoelastic material, it is not possible to apply this new methods, as a consequent of the viscoelastic dispersion. In this paper, we present a method based on the Continuous Wavelet Transform (CWT). Experiments were made in steel and acrylic. The results show no differences in steel and significant differences in acrylic as a viscoelastic material. In this last case the CWT shows better properties over the CCF and HT for the evaluation of time propagation.
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© 2002 Kluwer Academic Publishers
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Moreno, E., García, F., Castillo, M., Sotomayor, A., Castro, V., Fuentes, M. (2002). Ultrasonic Velocity Measurement in Viscoelastic Material Using the Wavelet Transform. In: Lee, H. (eds) Acoustical Imaging. Acoustical Imaging, vol 24. Springer, Boston, MA. https://doi.org/10.1007/0-306-47108-6_30
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DOI: https://doi.org/10.1007/0-306-47108-6_30
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-306-46518-5
Online ISBN: 978-0-306-47108-7
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