Digital vibration transducer

G - Physics – 01 – H

Patent

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G01H 9/00 (2006.01)

Patent

CA 2426307

A digital vibration transducer for producing a digital signal representative of a vibration of a vibrating member is provided. The transducer includes a laser source (12) producing a light beam (20) that is focused on a detection area. The light beam is reflected towards this detection area by a reflector (10), at an angle with the optical axis of the light beam and pivotable about a pivot axis. A linkage assembly (16,17) connects the vibrating member (50) to the reflector to convert the vibrating of the vibration member into a pivoting of the reflector, thereby sweeping the reflected light beam across the detection area. A sensing and encoding assembly (18,19) is provided in the detection area and produces the digital signal representative of the vibration of the vibrating member relatively to the sweeping of the light beam.

L'invention concerne un capteur de vibrations numérique servant à produire un signal numérique représentant une vibration d'un élément vibrant. Le capteur comprend une source laser produisant un faisceau lumineux focalisé sur une zone de détection. Le faisceau lumineux est réfléchi en direction de cette zone de détection, à un certain angle avec l'axe optique du faisceau lumineux, par un réflecteur pouvant être pivoté autour d'un axe de pivot. Un ensemble de liaison relie l'élément vibrant au réflecteur en vue de convertir la vibration de l'élément de vibration en un pivotement du réflecteur, balayant ainsi le faisceau lumineux réfléchi à travers la zone de détection. Un ensemble de détection et de codage est mis en place dans la zone de détection et produit le signal numérique représentant la vibration de l'élément vibrant par rapport au balayage du faisceau lumineux.

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