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在压电层结构中的声波用于选择性检测液体粘度

Andrey Smirnov¹, Vladimir Anisimkin¹, Elizaveta Shamsutdinova¹

¹Kotel'nikov Institute of Radio Engineering and Electronics of RAS, Moscow 125009, Russia.

Sensors (Basel, Switzerland)

|September 9, 2023

概括

这项研究开发了一种新的声学传感器,使用分层结构进行精确的液体粘度测量. 传感器在广泛范围内显示出对粘度的选择性敏感性,电导率和温度的干扰最小.

科学领域:

材料科学与工程材料科学与工程
声波设备声波设备
传感器技术传感器技术

背景情况:

高级声波对于开发先进传感器至关重要.
分层结构为波传播提供可调节的特性.
在液体中选择性粘度传感仍然是当前技术面临的挑战.

研究的目的:

设计和优化用于选择性液体粘度检测的声学传感器.
为了研究在层层结构中使用更高阶的声波来进行传感.
为了评估有关粘度,导电性和温度的传感器性能.

主要方法:

利用在涂有ZnO和/或AlN薄膜的板中传播的更高阶声波.
通过调整层厚度,波形特性和传播方向来优化传感器特性.
使用对温度不敏感的振幅响应,以提高选择性.

主要成果:

在 1-1500 cP 范围内实现了对液体粘度 (η) 的选择性灵敏度,对导电性 (σ) 和温度 (T) 的灵敏度较低.
确定了准纵向和更高阶的Lamb波为最佳的粘度传感.
已证明对粘度的灵敏度高达0.26dB/cP,显著超过对导电性的灵敏度.

结论:

多层结构允许设计具有高度选择性粘度检测的声学传感器.
高级声波提供可调节的特性,以优化传感器性能.
开发的传感器技术显示出在各种应用中准确测量液体粘度的前景.

关键词:

声板模式声板模式液体粘度液体粘度液体粘度压电薄膜是一种压电薄膜.板是板中的一种.

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相关概念视频

Viscosity

Viscosity

When water is poured into a glass, it falls freely and quickly, whereas if honey or maple syrup is poured over a pancake, it flows slowly and sticks to the surface of the container. This difference in the flow of different kinds of liquids arises due to the fluid friction between the liquid layers and the liquid and the surrounding material. This property of fluids is called fluid viscosity. In this example, water has a lower viscosity than honey and maple syrup.
The SI unit of viscosity is...