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Détection d'une dent manquante dans un engrenage à l'aide d'un signal acoustique
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ISBN10: 6208354935
ISBN13: 9786208354930
Publisher: Editions Notre Savoir
Published: Dec 5 2024
Pages: 56
Weight: 0.21
Height: 0.13 Width: 6.00 Depth: 9.00
Language: French
ISBN13: 9786208354930
Publisher: Editions Notre Savoir
Published: Dec 5 2024
Pages: 56
Weight: 0.21
Height: 0.13 Width: 6.00 Depth: 9.00
Language: French
Depuis l'Antiquité, les signaux sonores sont utilisés pour transmettre/communiquer les sentiments des êtres humains, de la nature et des animaux. De nos jours, les signaux sonores/acoustiques sont avantageusement utilisés pour surveiller la santé des machines. Dans ce projet, nous avons étudié les applications de l'acoustique dans le diagnostic des dents manquantes dans les engrenages. Un dispositif expérimental sera mis en place pour acquérir le signal acoustique et le signal sera traité à l'aide de techniques de traitement des signaux numériques. En fonction des caractéristiques du signal acoustique brut obtenu lors de l'expérience, des filtres conventionnels basés sur la transformée de Fourier et la transformée en ondelettes nouvellement développée sont appliqués. La transformée de Fourier étend la fonction originale (signal) en termes de fonction de base ortho-normale d'ondes sinusoïdales et cosinusoïdales de durée infinie, mais la transformée en ondelettes peut également le faire pour une durée finie. L'un des grands avantages du filtrage par ondelettes est que l'information temporelle n'est pas perdue. Le problème posé a une importance pratique pour le fonctionnement, l'inspection en ligne, la prédiction des défaillances et la maintenance des composants rotatifs.
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