石英音叉扫频及性能测试教学科研系统

吉林大学学报(信息科学版) ›› 2021, Vol. 39 ›› Issue (1): 100-105.

石英音叉扫频及性能测试教学科研系统

吉林大学电子科学与工程学院, 长春 130012

收稿日期:2020-08-09 出版日期:2021-03-19 发布日期:2021-03-22
作者简介:郑传涛(1982— ), 男, 河南商丘人, 吉林大学教授, 博士生导师, 主要从事电子科学与技术专业本科生与研究生理论与实验教学工作及红外激光光谱学与应用领域科研工作研究, (Tel)86-13756090979(E-mail)zhengchuantao@jlu.edu.cn
基金资助:
吉林大学“十三·五冶本科生规划教材基金资助项目; 吉林大学青年教师教学能力提升基金资助项目(2019XYB390); 吉林大学本科“创新示范课程冶建设基金资助项目; 吉林大学在线课程基金资助项目

Teaching and Research System for Frequency Sweep and Performance Test of Quartz Tuning Fork

College of Electronic Science and Engineering, Jilin University, Changchun 130012, China

Received:2020-08-09 Online:2021-03-19 Published:2021-03-22

摘要/Abstract

摘要： 为了测定石英增强光声光谱气体传感系统的谐振频率与品质因数, 同时服务于《高频电子线路》中 R-L-C选频电路的教学需求, 促进教学与科研的充分融合, 设计并实现了一种石英音叉扫频及性能测试系统。首先分析了石英音叉的 R-L-C 电学模型, 采用 Matlab 软件对模型做了仿真分析。研制了跨阻放大电路, 用于放大正弦激励或外加声场作用下的石英音叉输出信号。利用锁相放大器、跨阻放大器、信号发生器、 LabVIEW 信号平台, 建立了石英音叉扫频及性能测试系统。利用给定的石英音叉及该测试系统, 在真空封装及去除外壳两种情况下, 分别测试了石英音叉的等效电学参数、谐振频率、品质因数等性能。该系统既融合了 R-L-C 选频电路的基本知识, 又拓展了基于石英音叉的科研应用案例。实际应用表明, 石英音叉扫频及性能测试系统满足 R-L-C选频电路的实验教学需求以及石英增强光声光谱技术的科研需要, 取得了较好的教学与科研应用效果。

关键词: 实验教学系统, R-L-C 电路, 石英音叉, 石英增强光声光谱技术, LabVIEW 平台

Abstract: In order to measure the resonant frequency and the quality factor of quartz-enhanced photoacoustic spectroscopy gas sensing system, to serve the teaching requirements of R-L-C frequency selection circuit in the ourse of “ high frequency electronic circuit冶, to and promote the full integration of teaching and scientific research, a frequency sweep and performance test experimental system for quartz tuning fork is designed and implemented. The principle of R-L-C electrical model of quartz tuning fork is firstly analyzed, and the model is simulated by Matlab. In order to amplify the output signal of a quartz tuning fork under sinusoidal excitation or external sound field, a transimpedance amplifier circuit is designed. The frequency sweep and performance test system of quartz tuning fork is established by using a lock-in amplifier, a trans resistance amplifier, a signal generator and a LabVIEW signal platform. Using the given quartz tuning fork, the equivalent circuit model parameters, resonant frequency and quality factor are tested under vacuum packaging and shell removal. This system integrates the basic knowledge of R-L-C frequency selection circuit and expands the scientific research application cases based on quartz tuning fork. The practical application shows that the system can meet the experimental teaching requirements of R-L-C frequency selection circuit and scientific research needs of quartz enhanced photoacoustic spectroscopy technology, and has achieved good teaching and research application results.

Key words: experimental teaching system, R-L-C circuit, quartz tuning fork, quartz-enhanced photoacoustic absorption spectroscopy, LabVIEW

中图分类号:

TP37

郑传涛, 刘洋, 闫格, 胡立恩. 石英音叉扫频及性能测试教学科研系统[J]. 吉林大学学报(信息科学版), 2021, 39(1): 100-105.

ZHENG Chuantao, LIU Yang, YAN Ge, HU Lien. Teaching and Research System for Frequency Sweep and Performance Test of Quartz Tuning Fork[J]. Journal of Jilin University (Information Science Edition), 2021, 39(1): 100-105.