Ms. Alexandrine Huot Profile

Alexandrine Huot

at Telops Inc

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Author

Publications (5)

Proceedings Article | 3 May 2019 Presentation + Paper

Advanced signal processing applied to thermographic inspection of petrochemical furnaces

Fernando Lopez, Alexandrine Huot

Proceedings Volume 11004, 1100407 (2019) https://doi.org/10.1117/12.2519039

KEYWORDS: Inspection, Infrared cameras, Thermography, Cameras, Infrared imaging, Signal processing, Optical filters, Combustion, Diffusion, Data processing

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Proceedings Article | 14 May 2018 Presentation

Thermal infrared hyperspectral imaging for chemical mapping of an open mine (Conference Presentation)

Stephane Boubanga Tombet, Alexandrine Huot, Iwan Vitins, Éric Guyot, Frédérick Marcotte, Martin Chamberland

Proceedings Volume 10661, 1066104 (2018) https://doi.org/10.1117/12.2305142

KEYWORDS: Infrared radiation, Infrared imaging, Thermography, Industrial chemicals, Mining, Hyperspectral imaging, Cements, Raw materials, Minerals, Long wavelength infrared

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The hyperspectral chemical mapping of open mines exploited by industries are among the possible applications that could possibly benefit from thermal infrared long-distance survey. More specifically the cement production essential in the constructions of our cities. The cement is made by mixing different raw materials and firing them in order to achieve precise chemical proportions of lime, silica, alumina and iron in the finished product. The quality of cement is therefore directly related to the chemistry of the raw materials used. Approximately 80 to 90% of the raw material is limestone. Clayey raw material accounts for between 10 to 15%, although precise amounts vary. Magnesium carbonate, which may be present in limestone, is the main undesirable impurity. The level of magnesia (MgO) should not exceed 5% and many producers prefer a maximum of 3%; this excludes dolomite or dolomitic limestones for the manufacture of cement. In this work, we conducted thermal infrared (TIR) hyperspectral imaging for mineral mapping and mineralogy identification on a pit wall with Juracement at Cornaux using hyperspectral camera. This passive thermal infrared hyperspectral research instrument based on Fourier transform spectroscopy provides high spectral resolution data. The solid targets such as minerals not only emit but also reflect thermal infrared radiation. Since the two phenomena occur simultaneously, they end-up mixed in the radiance measured at the sensor level. To unveil the spectral features associated with minerals from TIR measurements, the respective contributions of self-emission and reflection in the measurement must be «unmixed» using temperature-emissivity separation (TES) algorithms. We developed a new TES procedure that allowed us to retrieve the spectral emissivity of the different minerals in the investigated scene. The chemical maps of the calcite dolomite mixtures were obtained on the pit wall the investigations were carried out, giving important insights on chemical the quality of the mine.

Proceedings Article | 14 May 2018 Presentation

Real time airborne gas detection using thermal hyperspectral imaging (Conference Presentation)

Stephane Boubanga Tombet, Alexandrine Huot, Eric Guyot, Vincent Farley, Frederick Marcotte, Martin Chamberland

Proceedings Volume 10661, 1066108 (2018) https://doi.org/10.1117/12.2305121

KEYWORDS: Hyperspectral imaging, Air contamination, Clouds, Environmental monitoring, Safety, Explosives, Thermal energy technology, Fourier transforms, Cameras, Associative arrays

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Proceedings Article | 13 October 2015 Paper

Time-resolved multispectral imaging of combustion reactions

Alexandrine Huot, Marc-André Gagnon, Karl-Alexandre Jahjah, Pierre Tremblay, Simon Savary, Vincent Farley, Philippe Lagueux, Éric Guyot, Martin Chamberland, Frédérick Marcotte

Proceedings Volume 9648, 964803 (2015) https://doi.org/10.1117/12.2194854

KEYWORDS: Optical filters, Combustion, Multispectral imaging, Cameras, Infrared imaging, Infrared radiation, Carbon dioxide, Thermography, Gases, Mid-IR

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Proceedings Article | 12 May 2015 Paper

Time-resolved multispectral imaging of combustion reaction

Alexandrine Huot, Marc-André Gagnon, Karl-Alexandre Jahjah, Pierre Tremblay, Simon Savary, Vincent Farley, Philippe Lagueux, Éric Guyot, Martin Chamberland, Fréderick Marcotte

Proceedings Volume 9485, 94851C (2015) https://doi.org/10.1117/12.2177258

KEYWORDS: Combustion, Optical filters, Cameras, Multispectral imaging, Infrared imaging, Carbon dioxide, Thermography, Infrared radiation, Image filtering, Gases

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