用于液体测量的音叉结构设计及其谐振特性研究

Structural Design and Resonance Characteristics Research of Tuning Fork For Liquid Measurement

音叉可用于测量液体介质密度、黏度,以及进行液位控制,具有精度高、可在线测量的优点,在生产中具有广阔的应用前景。文中介绍了谐振式音叉传感器的工作原理,提出了一种音叉的设计结构,利用正压电效应和逆压电效应实现了音叉的振动激励与检测。采用有限元方法分析了音叉固有频率与叉体长度等尺寸的关系,提出音叉谐振频率测量方法,最后通过试验完成结构验证。

Tuning forks can be used to measure the density and viscosity of liquid media, and to control the liquid level.It has broad application prospects in national production because of its advantages of high precision and online measurement.The working principle of the resonant tuning fork sensor was introduced and a kind of tuning fork structure design was proposed.The vibration excitation and detection of the tuning fork were realized by the positive and inverse piezoelectric effects.The FEM was used to analyze the relationship between the natural frequency of the tuning fork and the length and other dimensions of the fork body, a method for measuring the resonance frequency of the tuning fork was proposed.Finally, the structure verification was completed through the test.