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Numerical Simulation of Optical Excitation Vibration for Quartz Tuning Forks in Photoacoustic Spectrum Remote Sensing Devices
发布时间：2025-04-30
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- 发布时间：
- 2025-04-30
- 论文名称：
- Numerical Simulation of Optical Excitation Vibration for Quartz Tuning Forks in Photoacoustic Spectrum Remote Sensing Devices
- 发表刊物：
- Journal of Xi'an Jiaotong University
- 摘要：
- The problem that the optical excitation vibration process in photoacoustic spectrum remote sensing devices is influenced by air damping and laser device with different powers is considered, and a numerical simulation method is used to study the first four orders of vibration mode. A harmonic response analysis model for the vibration of quartz tuning forks excited by laser is established. Simulations are performed to study the effects of lasers with different power on vibration of quartz tuning fork, where the lasers after absorption of detected objects and collection by concave mirror excite the vibration. It is found that the resonance amplitude of tuning forks is proportional to the laser energy. In addition, the influence of different air dampings on the vibration of tuning fork is also taken into account in a large extent. Comparative analyses show that the laser power cannot be less than 10 mW, otherwise the resonance amplitude of the tuning fork is too small to generate proper piezoelectric current for detection of weak signal. Adopting vacuum packaging and increasing laser power improve the resonance amplitude of the tuning fork, while the influence of the former is greater. The conclusion may provide a theoretical guidance for further study of the photoacoustic spectrum analysis.
- 合写作者：
- Zhang, Zhouqiang；Jia, Shuhai；Ma, Binshan
- 卷号：
- 7（48）
- 是否译文：
- 否
- 发表时间：
- 2014-04-25
