Vibration Analysis and Measurement for Quartz Tuning Fork under Laser Irradiation

doi:10.7652/xjtuxb201410008

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Vibration Analysis and Measurement for Quartz Tuning Fork under Laser Irradiation

更新时间：2025-07-09

- Vibration Analysis and Measurement for Quartz Tuning Fork under Laser Irradiation
- Vol. 48, Issue 10, Pages: 49-53(2014)
- 作者机构：
  
  西安交通大学机械工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201410008
  CLC： TN249
- Online First：10 October 2014，
  
  Published：2014
- 稿件说明：
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Vibration Analysis and Measurement for Quartz Tuning Fork under Laser Irradiation[J]. 2014, 48(10): 49-53.
DOI：

Vibration Analysis and Measurement for Quartz Tuning Fork under Laser Irradiation[J]. 2014, 48(10): 49-53. DOI： 10.7652/xjtuxb201410008.

摘要

针对民航客机微量爆炸物的检测这一难题

对采用石英音叉的光声信号探测原理进行了分析

对光声光谱遥测的光路进行了简化

减少了激光能量的损失

然后建立了实验系统

对石英音叉在激光直接激励时的幅频特性进行了测试

探讨了激光光照位置对于石英音叉振幅的影响。结果表明

当激光光斑在石英音叉叉臂根部偏上约0.2 mm处时

石英音叉振幅达到最大值

激光光斑继续向上移动

石英音叉振幅减小

验证了石英音叉振幅与激光功率成正比这一论点。该研究为后续开展远距离光声光谱遥测奠定了基础。

Abstract

The trace explosive detection in airline security is still difficult. The principle of detecting the photo-acoustic signals produced by quartz tuning fork is analyzed

then the optical path is simplified with the propose to reduce the energy loss of laser. After the analysis of the amplitude of the quartz tuning fork and the signals produced by the quartz tuning fork

an experimental system is established and the amplitude-frequency characteristic curve of the quartz tuning fork irradiated by laser is acquired. In addition

the influence of the location of laser spot on the amplitude of the quartz tuning fork is measured. And it shows that the amplitude of the quartz tuning fork reaches the maximum when the laser spot is about 0.2 mm above the bottom of the prongs of the quartz tuning fork

laser spot moves up along the prongs

the amplitude decreases gradually

and the fact that the amplitude of the quartz tuning fork is proportional to the laser energy is verified. It is expected to apply to standoff photo-acoustic spectroscopy detection.

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references

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张周强, 贾书海, 马斌山. 光声光谱遥测装置中音叉光激励振动的数值模拟[J]. 西安交通大学学报, 2014, 48(7): 96-101.

ZHANG Zhouqiang, JIA Shuhai, MA Binshan. Numerical simulation of optical excitation vibration of quartz tuning fork in photoacoustic spectrum remote sensing device[J]. Journal of Xi'an Jiaotong University, 2014, 48(7): 96-101.

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