Improved T-shaped quartz tuning fork with isosceles-trapezoidal grooves optimized for quartz-enhanced photoacoustic spectroscopy

Feihu Fang; Runqiu Wang; Dongfang Shao; Yi Wang; Yilü Tao; Shengshou Lin; Yufei Ma; Jinxing Liang

Photoacoustics (Feb 2025)

Improved T-shaped quartz tuning fork with isosceles-trapezoidal grooves optimized for quartz-enhanced photoacoustic spectroscopy

Feihu Fang,
Runqiu Wang,
Dongfang Shao,
Yi Wang,
Yilü Tao,
Shengshou Lin,
Yufei Ma,
Jinxing Liang

Affiliations

Feihu Fang: Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology Ministry of Education, School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China
Runqiu Wang: National Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin 150001, China
Dongfang Shao: Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology Ministry of Education, School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China
Yi Wang: Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology Ministry of Education, School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China
Yilü Tao: Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology Ministry of Education, School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China
Shengshou Lin: Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology Ministry of Education, School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China
Yufei Ma: National Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin 150001, China; Corresponding authors.
Jinxing Liang: Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology Ministry of Education, School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China; Corresponding authors.

Journal volume & issue: Vol. 41
p. 100672

Abstract

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The quartz tuning fork (QTF) being the acoustic-electrical conversion element for quartz-enhanced photoacoustic spectroscopy (QEPAS) system directly affects the detection sensitivity. However, the low electromechanical conversion efficiency characteristic of standard QTF limits the further enhancement of the system. Therefore, the optimized design for QTF is becoming an important approach to improve the performance of QEPAS. In this work, 9 kHz T-shaped QTFs with isosceles-trapezoidal grooves are firstly applied to gas sensing experiments. Four types of 9 kHz QTFs are fabricated and applied to gas detection experiments. Simulation results reveal QTFs with isosceles-trapezoidal grooves are conducive to optimizing the stress distribution and enhancing electromechanical conversion efficiency. The results of the gas sensing experiment (acetylene C2H2) indicate that the signal peak and signal-to-noise ratio values of T-shaped QTF with positive isosceles-trapezoidal grooves can reach 1.44 and 1.85 times greater than the normal QTF with rectangular cross-section prongs.

Published in Photoacoustics

ISSN: 2213-5979 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics: Acoustics. Sound; Science: Physics: Optics. Light
Website: http://www.journals.elsevier.com/photoacoustics/

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