P2-31 形状記憶圧電アクチュエータ(ポスター発表)

概要

論文の詳細を見る
In an ordinary way, the piezoelectric displacement is proportional to the external electrical field. Even with the polarization reversal, the remanant piezoelectric displacement does not change. It is correct when the piezoelectric butterfly curve is symmetric with the piezoelectric displacement axis. However, with the voltage offset, which comes from an electrical imprint, the remanant piezoelectric displacement has two stable states. In this situation, without the electrical field, the actuator can have two stable positions depending on the polarization direction. This phenomenon enables us to use this actuator as a shape memory switch that does not require electrical supply to keep on and off positions, for example. To change the polarization direction, only pulse shaped voltage is required, hence a small electrical consumption and a simple driving circuit can be realized.
超音波エレクトロニクスの基礎と応用に関するシンポジウム運営委員会の論文
2006-11-15