公开(公告)号：KR1020080096265A

公开(公告)日：2008-10-30

申请号：KR1020070041502

申请日：2007-04-27

Applicant: 서강대학교산학협력단

Inventor： 이승엽 ,  최요한

IPC: H02N2/02

CPC classification number: H02N2/004 ,  H01L41/053 ,  H01L41/187 ,  H02N2/0055 ,  H02N2/008 ,  H02N2/06

Abstract: A piezoelectric element and a piezoelectric actuator using the same are provided to perform an accurate position control by enlarging the displacement of the piezoelectric actuator. A piezoelectric element(23) of a linear cantilever type vibrates independently in a bending direction and a lengthwise direction when an electrical signal is inputted. A first displacement enlargement device is fixedly arranged on a first surface of the piezoelectric element and respectively arranged on left/right nodes where a phase of a vibration mode is equalized. A second displacement enlargement device is fixedly arranged on a second surface opposite to the first surface of the piezoelectric element. A first fixing plate(31) is fixedly connected to the first displacement enlargement device and supplies a pre-load to the first displacement enlargement. A second fixing plate(33) is fixedly connected to the second displacement enlargement device and supplies the pre-load to the second displacement enlargement device. The piezoelectric element is generated by a current of a frequency with two same resonance modes.

Abstract translation: 提供一种压电元件和使用该压电元件的压电致动器，以通过扩大压电致动器的位移来执行精确的位置控制。 当输入电信号时，线性悬臂式压电元件（23）在弯曲方向和长度方向上独立地振动。 第一位移放大装置固定地布置在压电元件的第一表面上，并分别布置在振动模式相位相等的左/右节点上。 第二位移扩大装置固定地布置在与压电元件的第一表面相对的第二表面上。 第一固定板（31）固定地连接到第一位移放大装置，并将预加载提供给第一位移放大。 第二固定板（33）固定地连接到第二位移扩大装置，并将预加载件提供给第二位移增大装置。 压电元件由具有两个相同谐振模式的频率的电流产生。