Mise au point et caractérisation de scellement anodique

National audienceLa soudure anodique est une technique d’assemblage qui permet la réalisation de composant à l’échelle du micron. Cette technique qui a pour principe de souder deux plaques (verre/silicium) appelées wafers nécessite des étapes préalables. Au vue des prix des machines utilisées pour la soudure anodique, les abaques existent pour les matériaux standards. Cependant pour ce projet nous utilisons des matériaux résistif, fin avec cavité

Toward Improvements in Pressure Measurements for Near Free-Field Blast Experiments

This paper proposes two ways to improve pressure measurement in air-blast experimentations, mostly for close-in detonations defined by a small-scaled distance below 0.4 m.kg−1/3. Firstly, a new kind of custom-made pressure probe sensor is presented. The transducer is a piezoelectric commercial, but the tip material has been modified. The dynamic response of this prototype is established in terms of time and frequency responses, both in a laboratory environment, on a shock tube, and in free-field experiments. The experimental results show that the modified probe can meet the measurement requirements of high-frequency pressure signals. Secondly, this paper presents the initial results of a deconvolution method, using the pencil probe transfer function determination with a shock tube. We demonstrate the method on experimental results and draw conclusions and prospects