Novel approach for efficient resonance tracking in photoacoustic gas sensor systems based on a light-induced wall signal
Photoacoustic gas sensing is a method suited for the detection of radiation absorbing molecular species in the gas phase. Due to the backgroand-free detection, it has considerable benefits in the measurement of very low concentrations down to the parts-per-trillion range. Yet in resonant systems, th...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-06-01
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| Series: | Photoacoustics |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213597923000484 |
| _version_ | 1797801074782896128 |
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| author | C. Weber J. Kapp J. Wöllenstein K. Schmitt |
| author_facet | C. Weber J. Kapp J. Wöllenstein K. Schmitt |
| author_sort | C. Weber |
| collection | DOAJ |
| description | Photoacoustic gas sensing is a method suited for the detection of radiation absorbing molecular species in the gas phase. Due to the backgroand-free detection, it has considerable benefits in the measurement of very low concentrations down to the parts-per-trillion range. Yet in resonant systems, the resonance frequency depends on several parameters like temperature or gas composition and therefore must be continuously determined. In the present work, we propose a new method of tracking the resonance frequency using a photoacoustic signal generated at the walls of the resonant cell. The method has been evaluated with two different photoacoustic setups intended for the detection of NO2. We further propose an algorithm for finding the resonance frequency and evaluated the performance thereof. With this method, it is possible to detect the resonance frequency of a cylindrical and a dumbbell-shaped cell in less than two seconds and with an accuracy < 0.06% and < 0.2%, respectively. |
| first_indexed | 2024-03-13T04:44:54Z |
| format | Article |
| id | doaj.art-e08fc1f5b56348d48437af9b07f245bc |
| institution | Directory Open Access Journal |
| issn | 2213-5979 |
| language | English |
| last_indexed | 2024-03-13T04:44:54Z |
| publishDate | 2023-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Photoacoustics |
| spelling | doaj.art-e08fc1f5b56348d48437af9b07f245bc2023-06-19T04:28:03ZengElsevierPhotoacoustics2213-59792023-06-0131100495Novel approach for efficient resonance tracking in photoacoustic gas sensor systems based on a light-induced wall signalC. Weber0J. Kapp1J. Wöllenstein2K. Schmitt3Department of Microsystems Engineering–IMTEK, Laboratory for Gas Sensors, University of Freiburg, Georges-Koehler-Allee 102, 79110, Freiburg, Germany; Fraunhofer Institute for Physical Measurement Techniques IPM, Koehler-Allee 301, 79110, Freiburg, Germany; Corresponding author at: Department of Microsystems Engineering–IMTEK, Laboratory for Gas Sensors, University of Freiburg, Georges-Koehler-Allee 102, 79110, Freiburg, Germany.Department of Microsystems Engineering–IMTEK, Laboratory for Gas Sensors, University of Freiburg, Georges-Koehler-Allee 102, 79110, Freiburg, Germany; Fraunhofer Institute for Physical Measurement Techniques IPM, Koehler-Allee 301, 79110, Freiburg, GermanyDepartment of Microsystems Engineering–IMTEK, Laboratory for Gas Sensors, University of Freiburg, Georges-Koehler-Allee 102, 79110, Freiburg, Germany; Fraunhofer Institute for Physical Measurement Techniques IPM, Koehler-Allee 301, 79110, Freiburg, GermanyDepartment of Microsystems Engineering–IMTEK, Laboratory for Gas Sensors, University of Freiburg, Georges-Koehler-Allee 102, 79110, Freiburg, Germany; Fraunhofer Institute for Physical Measurement Techniques IPM, Koehler-Allee 301, 79110, Freiburg, GermanyPhotoacoustic gas sensing is a method suited for the detection of radiation absorbing molecular species in the gas phase. Due to the backgroand-free detection, it has considerable benefits in the measurement of very low concentrations down to the parts-per-trillion range. Yet in resonant systems, the resonance frequency depends on several parameters like temperature or gas composition and therefore must be continuously determined. In the present work, we propose a new method of tracking the resonance frequency using a photoacoustic signal generated at the walls of the resonant cell. The method has been evaluated with two different photoacoustic setups intended for the detection of NO2. We further propose an algorithm for finding the resonance frequency and evaluated the performance thereof. With this method, it is possible to detect the resonance frequency of a cylindrical and a dumbbell-shaped cell in less than two seconds and with an accuracy < 0.06% and < 0.2%, respectively.http://www.sciencedirect.com/science/article/pii/S2213597923000484Resonance trackingWall signal Resonant cellPhotoacoustic spectroscopyGas sensing |
| spellingShingle | C. Weber J. Kapp J. Wöllenstein K. Schmitt Novel approach for efficient resonance tracking in photoacoustic gas sensor systems based on a light-induced wall signal Photoacoustics Resonance tracking Wall signal Resonant cell Photoacoustic spectroscopy Gas sensing |
| title | Novel approach for efficient resonance tracking in photoacoustic gas sensor systems based on a light-induced wall signal |
| title_full | Novel approach for efficient resonance tracking in photoacoustic gas sensor systems based on a light-induced wall signal |
| title_fullStr | Novel approach for efficient resonance tracking in photoacoustic gas sensor systems based on a light-induced wall signal |
| title_full_unstemmed | Novel approach for efficient resonance tracking in photoacoustic gas sensor systems based on a light-induced wall signal |
| title_short | Novel approach for efficient resonance tracking in photoacoustic gas sensor systems based on a light-induced wall signal |
| title_sort | novel approach for efficient resonance tracking in photoacoustic gas sensor systems based on a light induced wall signal |
| topic | Resonance tracking Wall signal Resonant cell Photoacoustic spectroscopy Gas sensing |
| url | http://www.sciencedirect.com/science/article/pii/S2213597923000484 |
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