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A cylindrical rod ultrasonic motor with 1 mm diameter and its application in endoscopic OCT

机译:直径为1 mm的圆柱棒形超声电机及其在内窥镜OCT中的应用

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摘要

A tiny ultrasonic motor was constructed by using a piezoelectric ceramic cylindrical rod as a vibration generator of the stator. The fabricated tiny motor has a diameter of 1 mm, s length of 5 mm and a weight of 36 mg. The resonant frequency is 32 kHz with one fixed boundary or 83 kHz with two free boundaries. Four silver electrodes were deposited on the cylindrical surface. The spacing between two adjacent electrodes was carefully designed. A method was developed for the polarization of the stator. By using the bending vibration mode of the stator, the motor shows a performance with a speed of 1800 rpm and a stalled torqee of 4 mu Nm, and can bear a high driving voltage op to 350 F_(pp). The motor was used to drive an optical prism for circular scanning in an endoscopic OCT system. The tomographic images of the inner cavities of a plastic tube and a scallion were obtained, and the resolution was of the order of micrometer-scale.
机译:通过使用压电陶瓷圆柱棒作为定子的振动发生器来构造微型超声波电机。所制造的微型电动机的直径为1毫米,长度为5毫米,重量为36毫克。谐振频率为32 kHz(有一个固定边界)或83 kHz(有两个自由边界)。四个银电极沉积在圆柱表面上。仔细设计了两个相邻电极之间的间距。开发了一种用于定子极化的方法。通过使用定子的弯曲振动模式,电动机表现出了1800 rpm的速度和4μNm的堵转转矩,并且可以承受高达350 F_(pp)的高驱动电压。该马达用于驱动光学棱镜,以在内窥镜OCT系统中进行圆形扫描。获得了塑料管和大葱的内腔的断层图像,其分辨率约为微米级。

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