Dynamics of quartz tuning fork force sensors used in standoff photoacoustic detection

다국어 초록 (Multilingual Abstract)

In this paper, a two-degrees-of-freedom model with two coupled oscillators is established to study the dynamics of quartz tuning forkforce sensors. Air squeeze-film damping is considered in this model. When the laser power is 40 mW and the distance between the tuningfork and detected objects is approximately 0.5 m, the resonance amplitude of the tuning fork under the electromagnetic radiationpressure of the laser can reach 0.22 pm. Electromagnetic radiation pressure and resonance amplitude have the tendency to exponentiallydecay along with the distance between the tuning fork and detected objects. The influence of laser power and distance between the tuningfork and detected objects on electromagnetic radiation pressure is also considered. Lastly, an experimental device is set up to verify thecalculation result of the model. Analysis shows that the experimental data are in good agreement with the theoretical calculation results.

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