Real-time active-gas imaging of small gas leaks
<p>To tackle global warming, the reduction of greenhouse gas leaks is of great public interest. While state-of-the-art optical gas imaging (OGI) cameras can visualize larger gas leaks with magnitudes of liters per minute in the case of methane, a much more sensitive laser-based approach is int...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2023-02-01
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| Series: | Journal of Sensors and Sensor Systems |
| Online Access: | https://jsss.copernicus.org/articles/12/61/2023/jsss-12-61-2023.pdf |
| _version_ | 1797934769629036544 |
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| author | M. Bergau M. Bergau T. Strahl T. Strahl B. Scherer J. Wöllenstein J. Wöllenstein |
| author_facet | M. Bergau M. Bergau T. Strahl T. Strahl B. Scherer J. Wöllenstein J. Wöllenstein |
| author_sort | M. Bergau |
| collection | DOAJ |
| description | <p>To tackle global warming, the reduction of greenhouse gas leaks is of great public interest. While state-of-the-art optical gas imaging (OGI) cameras can visualize larger gas leaks with magnitudes of liters per minute in the case of methane, a much more sensitive laser-based approach is introduced here. This is accomplished using an infrared camera in combination with an interband cascade laser (ICL) as active illumination. The laser beam diverges such
that it covers roughly half of the camera's field of view. Three-image batches are recorded to perform classic direct absorption
spectroscopy (DAS) at the image scale. The obtained concentration length in parts per million meter (ppm m) is validated using measurements with varying known methane
concentrations, different reflective elements, and varying distances. The real-time camera was able to record and quantify a methane
leak as low as 40 mL min<span class="inline-formula"><sup>−1</sup></span>. Possible incorrect information due to moving objects
is taken into account using an adapted frame-difference approach.</p> |
| first_indexed | 2024-04-10T18:04:03Z |
| format | Article |
| id | doaj.art-a86ed1e5a47946249aac6e72f5c058d2 |
| institution | Directory Open Access Journal |
| issn | 2194-8771 2194-878X |
| language | English |
| last_indexed | 2024-04-10T18:04:03Z |
| publishDate | 2023-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Journal of Sensors and Sensor Systems |
| spelling | doaj.art-a86ed1e5a47946249aac6e72f5c058d22023-02-02T14:02:10ZengCopernicus PublicationsJournal of Sensors and Sensor Systems2194-87712194-878X2023-02-0112616810.5194/jsss-12-61-2023Real-time active-gas imaging of small gas leaksM. Bergau0M. Bergau1T. Strahl2T. Strahl3B. Scherer4J. Wöllenstein5J. Wöllenstein6Sensors Automation Lab, Endress+Hauser Process Solutions (DE) GmbH, 79110 Freiburg, GermanyLaboratory for Gas Sensors, Department of Microsystems Engineering, University of Freiburg, 79110 Freiburg, GermanyDepartment of Gas and Process Technology, Fraunhofer IPM, 79110 Freiburg, GermanyLaboratory for Gas Sensors, Department of Microsystems Engineering, University of Freiburg, 79110 Freiburg, GermanySensors Automation Lab, Endress+Hauser Process Solutions (DE) GmbH, 79110 Freiburg, GermanyDepartment of Gas and Process Technology, Fraunhofer IPM, 79110 Freiburg, GermanyLaboratory for Gas Sensors, Department of Microsystems Engineering, University of Freiburg, 79110 Freiburg, Germany<p>To tackle global warming, the reduction of greenhouse gas leaks is of great public interest. While state-of-the-art optical gas imaging (OGI) cameras can visualize larger gas leaks with magnitudes of liters per minute in the case of methane, a much more sensitive laser-based approach is introduced here. This is accomplished using an infrared camera in combination with an interband cascade laser (ICL) as active illumination. The laser beam diverges such that it covers roughly half of the camera's field of view. Three-image batches are recorded to perform classic direct absorption spectroscopy (DAS) at the image scale. The obtained concentration length in parts per million meter (ppm m) is validated using measurements with varying known methane concentrations, different reflective elements, and varying distances. The real-time camera was able to record and quantify a methane leak as low as 40 mL min<span class="inline-formula"><sup>−1</sup></span>. Possible incorrect information due to moving objects is taken into account using an adapted frame-difference approach.</p>https://jsss.copernicus.org/articles/12/61/2023/jsss-12-61-2023.pdf |
| spellingShingle | M. Bergau M. Bergau T. Strahl T. Strahl B. Scherer J. Wöllenstein J. Wöllenstein Real-time active-gas imaging of small gas leaks Journal of Sensors and Sensor Systems |
| title | Real-time active-gas imaging of small gas leaks |
| title_full | Real-time active-gas imaging of small gas leaks |
| title_fullStr | Real-time active-gas imaging of small gas leaks |
| title_full_unstemmed | Real-time active-gas imaging of small gas leaks |
| title_short | Real-time active-gas imaging of small gas leaks |
| title_sort | real time active gas imaging of small gas leaks |
| url | https://jsss.copernicus.org/articles/12/61/2023/jsss-12-61-2023.pdf |
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