The "cymbal" electromechanical actuator

A new transducer design was developed named the "Cymbal Transducer" with larger displacement, larger generative forces and more cost effective manufacturing. The cymbal transducers consist of a cylindrical ceramic element sandwiched between two truncated conical metal endcaps, and can be used as both sensors and actuators. The cymbal actuator exhibits almost 40 times higher displacement than the same size of ceramic element. Effective piezoelectric charge coefficient, eff. D/sub 33/, of a cymbal is roughly 40 times higher than PZT itself.

[1]  A. Dogan,et al.  Metal-Ceramic Composite Transducer, the "Moonie" , 1995 .

[2]  Kenji Uchino,et al.  Accelerometer Application of the Modified Moonie (Cymbal) Transducer , 1996 .

[3]  K. Uchino,et al.  The effect of geometry on the characteristics of the moonie transducer and reliability issue , 1994, 1994 Proceedings of IEEE Ultrasonics Symposium.

[4]  Kenji Uchino,et al.  High displacement ceramic metal composite actuators (moonies) , 1994 .

[5]  Gene H. Haertling,et al.  Rainbow Ceramics-A New Type of Ultra-High-Displacement Actuator , 1994 .

[6]  Kenji Uchino,et al.  Pulse Driving Method of Piezoelectric Actuators , 1986, Sixth IEEE International Symposium on Applications of Ferroelectrics.

[7]  R.E. Newnham,et al.  Composite piezoelectric transducer with truncated conical endcaps "cymbal" , 1997, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[8]  K. Uchino,et al.  Capped ceramic hydrophones , 1995, 1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium.