Self-Excited Vibrational Cantilever-Type Viscometer Driven by Piezo-Actuator
Self-Excited Vibrational Cantilever-Type Viscometer Driven by Piezo-Actuator
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DOI：
10.1115/1.4030975
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发表时间：
2015-12-01
影响因子：
1.7
通讯作者：
Kuroda, Masaharu
中科院分区：
文献类型：
--
作者：
Higashino, Keiichi;Yabuno, Hiroshi;Kuroda, Masaharu
新粘度计的设计和操作通常侧重于设备的小型化和对少量液体样品的在线监测。通常用于粘度测量的振动粘度计利用由淹没在液体中的振荡器的激励获得的频率响应曲线的峰值。然而，对于高粘度液体，频率响应曲线的峰值是模糊的或不存在的，因此很难测量。为了克服这一缺点，为了使设备小型化，我们使用了由速度反馈控制产生的自激振荡。我们的设计使用了一种粘度计，该粘度计采用了由压电式致动器驱动的悬臂梁，其分析不依赖于频率响应曲线。设计了一台压电驱动的悬臂梁样机，其顶端安装了振动板，并按规范进行了实验研究。该机制可以集成到微电子机械系统(MEMS)中。
The design and operation of new viscometers are often presented with a focus on the miniaturization of the device and online monitoring of small amounts of liquid samples. The vibrational viscometers commonly used for viscosity measurements exploit the peak value of the frequency-response curve obtained from excitations of the oscillator submerged in the liquid. However, for high-viscosity liquids, the peak of the frequency-response curve is ambiguous or nonexistent, and hence hard to measure. To overcome this drawback and with a view to miniaturizing the device, we use the self-excited oscillations produced by a velocity feedback control. Our design uses a viscometer employing a cantilever driven by a piezo-actuator with analytics that do not rely on the frequency-response curve. A prototype piezo-driven macrocantilever with an oscillating plate attached at its tip was experimentally performed according to specifications. The proposed mechanism can be integrated into microelectromechanical systems (MEMS).