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http://dx.doi.org/10.7776/ASK.2006.25.4.164

New Design and Application of PVDF Ultrasonic Transducer for Measurement of Material Properties  

Hong Soung-Wook (부경대학교 대학원 음향진동공학과)
Kim Jung-Soon (동명대학교 멀티미디어공학과)
Kim Sang-Yoon (부경대학교 물리학과)
Kim Moo-Joon (부경대학교 물리학과)
Ha Kang-Lyeol (부경대학교 물리학과)
Publication Information
The Journal of the Acoustical Society of Korea / v.25, no.4, 2006 , pp. 164-171 More about this Journal
Abstract
If the velocities of longitudinal, transverse and leaky surface acoustic waves in an isotropic material are given, the elastic constants and density of the material can be deduced analytically. Those velocities have been measured using three ultrasonic transducers with different vibrational modes so far. In this paper a line-focusing PVDF transducer with divided electrodes was newly proposed and designed for measuring approximate velocities of the three waves. The measurement method established in this study for each waves using the transducer was applied to several isotropic materials including fused quartz. The elastic stiffness constants and densities of the materials were calculated using the measured velocities, and the accuracies were discussed. It was shown that the obtained results are in good accord with the reference values.
Keywords
Ultrasonic Transducer; PVDF (Polyvinylidene Fluoride); Line-Focusing; Leaky Surface Acoustic Wave; Stiffness Constant;
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