Modeling and characterization of piezoelectric cantilever in fluids at different temperatures
Modeling and characterization of piezoelectric cantilever in fluids at different temperatures
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DOI：
10.1016/j.precisioneng.2014.04.001
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发表时间：
2014-10
影响因子：
3.6
通讯作者：
Z. Chew;Lijie Li
中科院分区：
文献类型：
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作者：
Z. Chew;Lijie Li
本文介绍了在不同类型液体中用作传感器的压电梁的测量和建模。它浸泡在不同的流体中，温度从20°C上升到50°C。其工作原理是基于检测悬臂梁在不同溶液中的不同共振频率。利用矢量网络分析仪测量了压电梁的振荡。利用谐振腔模型推导出的等效电路对实验数据进行了模拟。这些计算出的电路常数与被测液体的物理性质有关。这些液体的组合包括非导电溶液和导电溶液，具有低粘度和高粘度，涵盖了流体的各种常见物理性质。本研究的重点是探讨温度影响下压电悬臂梁作为液体传感器的性能。等效电路模型在非导电溶液中对实验数据拟合是可行的，但在导电溶液中效果较差。
This paper introduces measurement and modeling of a piezoelectric beam used as a sensor in different types of liquids. It is immersed in different fluids at temperatures increasing from 20 °C to 50 °C. The working principle is based on detecting different resonance frequencies of the cantilever in different solutions. The oscillation of piezoelectric beam is measured using a vector network analyzer. An electrical equivalent circuit derived from a resonator model is used to simulate the experimental data. These calculated circuit constants have been related to physical properties of liquids under test. The combination of these liquids which includes non-conducting and conducting solutions, exhibiting low and high viscosity covers a good range of common physical properties of fluids. Main focus of this research is to explore the capability of piezoelectric cantilever as a liquid sensor with the influence of temperature. The equivalent circuit model has been proved to be viable to fit experimental data in non-conducting solution but less effective in conducting solution.