JST  Vol.3 No.2 , June 2013
Study of Material Evaluation Probe Using a Longitudinal Wave and a Transverse Wave
ABSTRACT
Transmitting a longitudinal wave and a traverse wave into a composite material in a molten state has been studied in the online control of the composite material which cannot be evaluated by a conventional ultrasonic sensor as a final analysis, using the difference in the propagation characteristics of both modes. It is especially expected that measurement of the physical quantity which was not able to be conventionally measured can be performed by carrying out coincidence measurement of the ultrasonic wave in both modes. Therefore, in this research study, an ultrasonic probe, which can simultaneously transmit and receive a longitudinal wave and a traverse wave has been developed using an electromagnetic acoustic transducer (EMAT) because it has the advantage of measuring high temperature samples. In this study, two methods have been compared. The 1st method uses a traverse wave EMAT that travels in a vertical direction and a bar wave by which the low order mode is equivalent to longitudinal wave vibration. The other method is to carry out the mode conversion of the traverse wave by a traverse wave-EMAT. The longitudinal converted from the transverse wave are spread in the axis direction. As the experimental results of both optimizations of the drive conditions, it has been confirmed that the 2nd mode conversion method was promising. This paper reports about the trial process and the experimental results.

Cite this paper
R. Murayama, M. Kobayashi and C. Jen, "Study of Material Evaluation Probe Using a Longitudinal Wave and a Transverse Wave," Journal of Sensor Technology, Vol. 3 No. 2, 2013, pp. 25-29. doi: 10.4236/jst.2013.32005.
References
[1]   L. Beloqui, J. Krautkramer and H. H. Krautkramer, “Ultrasonic Testing of Materials,” 4th Edition, Springer, Berlin, 1990, pp. 528-550.

[2]   B. A. Auld, “Acoustic Fields and Waves in Solids,” New York, Vol. 2, 1973, pp. 30-38.

[3]   R. Kazys, A. Voleisis, R. Sliteris, L. Mazeika, R. V. Nieuwenhove, P. Kupschus and H. A. Abderrahim, “High Temperature Ultrasonic Transducers for Imaging and Measurements in a Liquid Pb/Bi Eutectic Alloy,” IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Vol. 52, No. 4, 2005, pp. 525-537. doi:10.1109/TUFFC.2005.1428033

[4]   T. Arakawa, K. Yoshikawa, S. Chiba, K. Muto and Y. Atsuta, “Applications of Brazed-Type Ultrasonic Probes for High and Low Temperature Uses 2,” Nondestructive Testing and Evaluation, Vol. 7, No. 1-6, 1992, pp. 263-272. doi:10.1080/10589759208953005

[5]   R. B. Thompson, “A Model for the Eletromagnetic Generation and Detection of Rayleigh and Lamb Wave,” IEEE Transaction on Sonics and Ultrasonics, Vol. 20, No. 4, 1973, pp. 340-346. doi:10.1109/T-SU.1973.29770

[6]   M. Hirao and H. Ogi, “EMATS for Science and Industry,” Kluwer Academic Publishers, 2003. doi:10.1007/978-1-4757-3743-1

[7]   Y. Ono, C.-K. Jen and M. Kobayashi, “High Temperature Integrated Ultrasonic Shear and Longitudinal Wave Probes,” Review of Scientific Instruments, Vol. 78, No. 2, 2007, pp. 1-5. doi:10.1063/1.2669719

[8]   C.-K. Jen, Y. Ono and M. Kobayashi, “High Temperature Integrated Ultrasonic Shear Wave Probes,” Applied Physics Letters, Vol. 89, No. 18, 2006, pp. 1-4. doi:10.1063/1.2372767

[9]   M. O. Si-Chaib, H. Djelouah and M. Bocquet, “Applications of Ultrasonic Reflection Ode Conversion Transducers in NDE,” NDT & E International, Vol. 33, No. 2, 2000, pp. 91-99. doi:10.1016/S0963-8695(99)00027-4

 
 
Top