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Quartz tuning fork-based demodulation of an acoustic signal induced by photo-thermo-elastic energy conversion

A gas sensing method based on quartz-enhanced photothermal spectroscopy (QEPTS) demodulated by quartz tuning fork (QTF) sensing acoustic wave is reported for the first time. Different from traditional QEPTS, the method proposed in this paper utilizes the second QTF to sense acoustic wave produced by...

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Detalles Bibliográficos
Autores principales: Lang, Ziting, Qiao, Shunda, He, Ying, Ma, Yufei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8144470/
https://www.ncbi.nlm.nih.gov/pubmed/34040982
http://dx.doi.org/10.1016/j.pacs.2021.100272
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author Lang, Ziting
Qiao, Shunda
He, Ying
Ma, Yufei
author_facet Lang, Ziting
Qiao, Shunda
He, Ying
Ma, Yufei
author_sort Lang, Ziting
collection PubMed
description A gas sensing method based on quartz-enhanced photothermal spectroscopy (QEPTS) demodulated by quartz tuning fork (QTF) sensing acoustic wave is reported for the first time. Different from traditional QEPTS, the method proposed in this paper utilizes the second QTF to sense acoustic wave produced by the first QTF owing to the vibration resulted from photo-thermo-elastic effect. This indirect demodulation by acoustic wave sensing can avoid QTF being irradiated by laser beam and therefore get less noise and realize better detection sensitivity. Four different sensing configurations are designed and verified. Acetylene (C(2)H(2)) with a volume concentration of 1.95 % is selected as the target gas. A model of sound field produced by the first QTF vibrating is established by finite element method to explain the variation trend of signal and noise in the second QTF. The measured results indicate that this technique had an enhanced signal-to-noise ratio (SNR) of 1.36 times when compared to the traditional QEPTS. Further improvement methods for such technique is proposed.
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spelling pubmed-81444702021-05-25 Quartz tuning fork-based demodulation of an acoustic signal induced by photo-thermo-elastic energy conversion Lang, Ziting Qiao, Shunda He, Ying Ma, Yufei Photoacoustics Research Article A gas sensing method based on quartz-enhanced photothermal spectroscopy (QEPTS) demodulated by quartz tuning fork (QTF) sensing acoustic wave is reported for the first time. Different from traditional QEPTS, the method proposed in this paper utilizes the second QTF to sense acoustic wave produced by the first QTF owing to the vibration resulted from photo-thermo-elastic effect. This indirect demodulation by acoustic wave sensing can avoid QTF being irradiated by laser beam and therefore get less noise and realize better detection sensitivity. Four different sensing configurations are designed and verified. Acetylene (C(2)H(2)) with a volume concentration of 1.95 % is selected as the target gas. A model of sound field produced by the first QTF vibrating is established by finite element method to explain the variation trend of signal and noise in the second QTF. The measured results indicate that this technique had an enhanced signal-to-noise ratio (SNR) of 1.36 times when compared to the traditional QEPTS. Further improvement methods for such technique is proposed. Elsevier 2021-05-15 /pmc/articles/PMC8144470/ /pubmed/34040982 http://dx.doi.org/10.1016/j.pacs.2021.100272 Text en © 2021 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Research Article
Lang, Ziting
Qiao, Shunda
He, Ying
Ma, Yufei
Quartz tuning fork-based demodulation of an acoustic signal induced by photo-thermo-elastic energy conversion
title Quartz tuning fork-based demodulation of an acoustic signal induced by photo-thermo-elastic energy conversion
title_full Quartz tuning fork-based demodulation of an acoustic signal induced by photo-thermo-elastic energy conversion
title_fullStr Quartz tuning fork-based demodulation of an acoustic signal induced by photo-thermo-elastic energy conversion
title_full_unstemmed Quartz tuning fork-based demodulation of an acoustic signal induced by photo-thermo-elastic energy conversion
title_short Quartz tuning fork-based demodulation of an acoustic signal induced by photo-thermo-elastic energy conversion
title_sort quartz tuning fork-based demodulation of an acoustic signal induced by photo-thermo-elastic energy conversion
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8144470/
https://www.ncbi.nlm.nih.gov/pubmed/34040982
http://dx.doi.org/10.1016/j.pacs.2021.100272
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