An Approach to Designing a Dual Frequency Piezoelectric Ultrasonic Transducer

Document Type : Original Research Paper


1 Mechanical Engineering Department, Faculty of Engineering, Bu-Ali Sina University, Hamedan, Iran.

2 Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran


This paper has been devoted to such approach for designed and fabricated the dual frequency piezoelectric ultrasonic transducer having longitudinal vibrations for high power application. By using analytical analysis, the resonance frequency equations of the transducer in the half-wave and the all-wave vibrational modes were determined for the assumed first resonance frequency of 25kHz. According to the resonance frequency equation, four transducers with two different constructions (Type A and B) were designed and made. The finite element method provided by commercial ANSYS was employed for FEM modeling and analysis of the transducer to observe its vibration behavior. It was shown that there is a good agreement between the experimental and FEM results. The designed and fabricated transducer can be excited to vibrate at two resonance frequencies, which correspond to the half-wave and the all-wave vibrational modes of the transducer, and use of Type B transducer greatly increased the mechanical quality factor (Q) of piezoelectric transducers.


[1] L. Shuyu, Study on the multifrequency Langevin ultrasonic transducer, Ultrasonics, 33(6) (1995) 445-448.
[2] Y.R. Yeon-bo Kim, New design of matching layers for high power and wide band ultrasonic transducers, Sensor. Actuator., 71 (1998) 116-122.
[3] L. Parrini, Design of advanced ultrasonic transducers for welding devices, IEEE Trans. Ultrason., Ferroelect., Freq. Control., 48(6) (2001) 1632-1639.
[4] B. Dubus, G. Haw, C. Granger, O. Ledez, Characterization of multilayered piezoelectric ceramics for high power transducers, Ultrasonics, 40 (2002) 903-906.
[5] H.L.W. Chan, M.W. Ng, P.C.K. Liu, Effect of hybrid structure (1/3 composite and ceramic) on the performance of sandwich transducers, Mat. Sci. Eng., B99 (2003) 6-10.
[6] S. Saitoh, M. Izumi, Y. Mine, A dual frequency ultrasonic probe for medical applications, IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 42 (1995) 294-300.
[7] G. Piazza, P.J. Stephanou, A. Pisano, Single-chip multiple-frequency AlN MEMS filters based on contour-mode piezoelectric resonators, J. Microelectromech. Syst., 16 (2007) 319-28.
[8] K. Heath Martin, B.D. Lindsey, J. Ma, M. Lee, S. Li, F.S. Foster , X. Jiang, P.A. Dayton, Dualfrequency piezoelectric transducers for contrast enhanced ultrasound imaging, Sensors, 14 (2014) 20825-20842.
[9] S. Lin, C. Xu, Analysis of the sandwich ultrasonic transducer with two sets of piezoelectric elements, Smart. Mater. Struct., 17(6) (2008) 6 065008. 
[10] S. Lin, An improved cymbal transducer with combined piezoelectric ceramic ring and metal ring, Sensor. Actuator., 163(1) (2010) 266-276.
[11] S. Lin, L. Xu, H. Wenxu, A new type of high power composite ultrasonic transducer, J. Sound. Vib., 330(7) (2011) 1419-1431.
[12] S¸. Deniz, The design of a multi-frequency underwater acoustic transducer with cylindrical piezoelectric elements, MSc Thesis. Turkey: Middle East Technical University; 2011.
[13] T. Asami, H. Miura, Longitudinaltorsional vibration source consisting of two transducers with different vibration modes, JPN. J. Appl. Phys., 55 (2016) 7-8.
[14] J.W. Rayleigh, The Theory of Sound, New York, 1945.
[15] K.F. Graff, Wave Motion in Elastic Solids, Oxford University Press, 1975.
[16] R.G. Grimes, J.G. Lewis, H.D. Simon, A shifted block lanczos algorithm for solving sparse systematic generalized eigenproblems, Siam. J. Matrix. Anal. Appl., 15 (1994) 228-272.
[17] Piezoelectric Ceramics for High Power Applications data sheet, TAMURA CO., 2006.
[18] G.W. Taylor., J.J. Gagnepain, Piezoelectricity, New York: Gordon and Breach Science, 4 (1960).