Improved T-shaped Quartz Tuning Fork with Isosceles-trapezoidal Grooves Optimized for Quartz-enhanced Photoacoustic Spectroscopy

Overview

Journal Photoacoustics

Date 2024 Dec 19

PMID 39697431

Authors

Feihu Fang

Runqiu Wang

Dongfang Shao

Yi Wang

Yilu Tao

Shengshou Lin

Yufei Ma

Jinxing Liang

Affiliations

Soon will be listed here.

Abstract

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 CH) 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.

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