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

作　　者：张艳华[1] 王喆[1] 于洋[1] ZHANG Yan-hua;WANG Zhe;YU Yang(Beijing Institute of Structure and Environment Engineering,Beijing 100076,China)

机构地区：[1]北京强度环境研究所,北京100076

出　　处：《仪表技术与传感器》2022年第12期20-24,共5页Instrument Technique and Sensor

基　　金：北强所2018年所内预研创新项目。

摘　　要：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.

关 键 词：音叉 结构设计 压电激励与检测 有限元 液体介质测量 谐振 

分 类 号：TP212.12[自动化与计算机技术—检测技术与自动化装置]