Graduate School of Frontier Sciences, The University of Tokyo 5-1-5 Kashiwano-ha, Kashiwa 277-8563, Japan.
Ultrasonics. 2012 Jan;52(1):75-80. doi: 10.1016/j.ultras.2011.06.013. Epub 2011 Jul 1.
The Smooth Impact Drive Mechanism (SIDM) is a linear piezoelectric actuator that has seen practically applied to camera lens modules. Although previous SIDM actuators are easily miniaturized and enable accurate positioning, these actuators cannot actuate at high speed and cannot provide powerful driving because they are driven at an off-resonant frequency using a soft-type PZT. In the present study, we propose a resonant-type SIDM using a bolt-clamped Langevin transducer (BLT) with a hard-type PZT. The resonant-type SIDM overcomes the above-mentioned problems and high-power operation becomes possible with a very simple structure. As a result, we confirmed the operation of resonant-type SIDM by designing a bolt-clamped Langevin transducer. The properties of no-load maximum speed was 0.28m/s at driving voltages of 80V(p-p) for 44.9kHz and 48V(p-p) for 22.45kHz with a pre-load of 3.1N.
平滑冲击驱动机构 (SIDM) 是一种线性压电致动器，已实际应用于相机镜头模块。虽然以前的 SIDM 致动器易于小型化并能够实现精确定位，但这些致动器不能高速驱动，也不能提供强大的驱动力，因为它们使用软 PZT 在非谐振频率下驱动。在本研究中，我们提出了一种使用带有硬 PZT 的螺栓夹紧兰杰文 transducer (BLT) 的谐振型 SIDM。与上述问题相比，谐振型 SIDM 采用非常简单的结构即可实现高功率操作。结果，我们通过设计螺栓夹紧兰杰文 transducer 来确认谐振型 SIDM 的操作。在空载时，在 3.1N 的预载下，以 80V(p-p) 的驱动电压在 44.9kHz 和 48V(p-p) 的 22.45kHz 时，最大空载速度为 0.28m/s。
