Multiple sensor apparatus and method for monitoring...

G - Physics – 01 – H

Patent

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G01H 1/00 (2006.01)

Patent

CA 2278699

A method and device (100) for processing encoder signals from turbomachines (10) to produce frequency modulation signals representing fully isolated rotor vibrational resonances. Multi-sensor and multi-sideband group (72) processing provides enhanced results. The method provides dramatically improved frequency resolution. Amplitude modulation and random noise (56) effects are removed by a variety of artifact-free techniques. Signals then are completely separated into components (74, 76, 78) for rotational vibration and translational vibration. Fully isolating rotational vibration unmasks previously undetectable signal components of diagnostic value. In cases of high background vibration, Wiener filtering removes the effects of exogenous vibration. By these various techniques, the present invention provides significantly enhanced diagnostic information regarding condition and performance in turbomachines.

Cette invention concerne un procédé et un dispositif (100) de traitement de signaux codeurs issus de turbomachines (10) en vue de la production de signaux en modulation de fréquence représentant des résonances parfaitement isolées des vibrations d'un rotor. Un traitement à capteurs multiples et à groupes de bandes latérales multiples (72) permet d'obtenir des résultats améliorés. On supprime les effets engendrés par la modulation de l'amplitude et les bruits aléatoires (56) au moyen d'une variété de procédés exempts de tout artefact. On sépare ainsi complètement les signaux en composantes (74, 76, 78) associées à la vibration de rotation et à la vibration de translation. La vibration de rotation entièrement isolante démasque des composantes du signal précédemment indécelables qui possèdent une valeur diagnostique. En cas de forte vibration d'arrière-plan, le filtrage de Wiener supprime les effets de la vibration exogène. Au moyen de ces divers procédés, la présente invention permet d'obtenir des informations diagnostiques considérablement améliorées permettant d'évaluer l'état et l'efficience des turbomachines.

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