Detection of Harmonic Components Generated from Crept Metal Rod Using a Double-Layered Piezoelectric Transducer System

  • M. Fukuda
  • M. Nishihira
  • K. Imano
Conference paper
Part of the Acoustical Imaging book series (ACIM, volume 29)


Second harmonic components generated from plastic deformed metal rods are detected in real time by using a double-layered piezoelectric transducer (DLPT). The DLPT is comprised of two transducers with resonance frequencies of f 0; its resonance frequency is equal to f 0/2 when the transducers are connected in parallel and f 0 when the transducers are connected in series. The performance of the DLPT used in this ultrasonic system is evaluated. Samples of plastic deformed metal rods are prepared by tensile test equipment. The relative amplitude of the second harmonic component increased by approximately 25 dB in the metal rods after the tensile tests compared to before the tensile tests. A variation of second harmonic components generated by plastic deformed metal rods is distinctly measured by our system.

Key words

Double-layered piezoelectric transducer Second harmonic component Plastic deformed metal rod Tensile test Pulse echo 


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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • M. Fukuda
    • 1
  • M. Nishihira
    • 1
  • K. Imano
    • 1
  1. 1.Department of Electrical and Electronic Engineering Faculty of Engineering and Resouce ScienceAkita UniversityJapan

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