Accurate determination of transit time of ultrasound in thin layers

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Accurate determination of transit time of ultrasound in thin layers

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The authors propose a new method to remove the transient response of the piezoelectric transducer in the pulse-echo method using the inverse Fourier transform acoustic input impedance and reflection coefficient so that the time resolution in the measurement of transit time in a thin object may be increased.

Inspec keywords: ultrasonic materials testing; thickness measurement; ultrasonic velocity measurement; Fourier transforms; transient response; acoustic impedance; piezoelectric transducers

Other keywords: acoustic input impedance; thin layers; transient response elimination; reflection coefficient; pulse-echo method; time resolution; ultrasound transit time determination; inverse Fourier transform; piezoelectric transducer; layer thickness measurement

Subjects: Materials testing; Spatial variables measurement; Transduction; devices for the generation and reproduction of sound; Spatial variables measurement; Nondestructive testing; Sonic and ultrasonic transducers and sensors; Piezoelectric and ferroelectric devices; Sonic and ultrasonic applications; Measurement by acoustic techniques

References

    1. 1)
      • G. Hayward , M.N. Jackson . Discrete-time modeling of the thickness mode piezoelectric transducer. IEEE Trans. , 3 , 137 - 150
    2. 2)
      • M. Redwoos . Transient performance of a piezoelectric transducer. J. Acoust. Soc. Am. , 4 , 527 - 536
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19950716
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