Guided wave phase velocity measurement using multi-emitter and multi-receiver arrays in the axial transmission configuration.

作者: Jean-Gabriel Minonzio , Marilyne Talmant , Pascal Laugier

DOI: 10.1121/1.3377085

关键词:

摘要: This paper is devoted to a method of extraction guided waves phase velocities from experimental signals. Measurements are performed using an axial transmission device consisting linear arrangement emitters and receivers placed on the surface inspected specimen. The technique takes benefit both multiple validated reference wave guide. mode obtained projection in singular vectors basis. determined by values decomposition (SVD) response matrix between two arrays frequency domain. enables recover accurately velocity dispersion curves. SVD based approach was designed overcome limitations spatio-temporal Fourier transform for receiver array limited spatial extent as case clinical assessment cortical bone transmission.

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