Numerical Simulation of Optical Excitation Vibration for Quartz Tuning Forks in Photoacoustic Spectrum Remote Sensing Devices

Release Time:2025-04-30  Hits:

• Date:2025-04-30
• Title of Paper:Numerical Simulation of Optical Excitation Vibration for Quartz Tuning Forks in Photoacoustic Spectrum Remote Sensing Devices
• Journal:Journal of Xi'an Jiaotong University
• Summary: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.
• Co-author:Zhang, Zhouqiang；Jia, Shuhai；Ma, Binshan
• Volume:7（48）
• Translation or Not:No
• Date of Publication:2014-04-25