Étude et développement d'une plateforme de détection chimique à ondes acoustiques de surface pour environnement sévère haute température

Abstract : Measuring pollutant concentrations in gas and vapors emissions of automotive systems are essential to environmental issues. This work presents a stand-alone portable device dedicated to high temperature gas detection. The system includes a Langasite-based (LGS) acoustic sensor, a ceramic heater and a platform with RF connections for remote in-situ measurements. The packaging consists in a hermetic stainless steel cell which enables safe gas detection. In situ temperature measurements have been achieved and the thermal behavior was successfully investigated in the temperature range 25−400 °C. The designed cell highlights good agreement with theoretical models and reproducibility of the measurements. The system has been exposed to volatile organic compounds (VOC) exposures and promising ppm level detections have been recorded.
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  • HAL Id : tel-00585725, version 1

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Gregory Tortissier. Étude et développement d'une plateforme de détection chimique à ondes acoustiques de surface pour environnement sévère haute température. Micro et nanotechnologies/Microélectronique. Université Sciences et Technologies - Bordeaux I, 2009. Français. ⟨tel-00585725⟩

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