Inverse corner cube for non-intrusive three axis vibration...

G - Physics – 01 – H

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G01H 9/00 (2006.01) G01M 7/02 (2006.01)

Patent

CA 2450874

A non-intrusive apparatus and method for measuring vibration of an object along three axes. A vibration measurement device is provided which has three orthogonal right triangular panels forming a pyramidal shape having three 90~ angled corners which meet at an apex, wherein each triangular panel has an outer mirrored surface. The device is attached to an object which is subjected to vibration, such that the apex of the device points in a direction away from the object. A beam of light is directed onto the apex of the device such that a portion of the light is reflected off of each mirrored surface, sending reflected light in three directions to three different light sensors. The magnitude of vibration of the object can the be determined in each of three orthogonal directions, along three axes, by measuring the difference in movements of position between the reflected light and a reference beam.

L'invention concerne un appareil et un procédé non intrusifs pour mesurer la vibration d'un objet le long de trois axes. L'invention concerne plus spécifiquement un dispositif de mesure de la vibration qui possède trois panneaux en forme de triangles rectangles orthogonaux formant une pyramide avec trois coins à angle de 90· se rejoignant au niveau d'un sommet, chaque panneau triangulaire possédant une surface extérieure recouverte d'un miroir. Ce dispositif est fixé à un objet soumis à vibration, le sommet du dispositif pointant dans une direction éloignée de l'objet. Un faisceau lumineux est dirigé sur le sommet du dispositif de manière qu'un partie de la lumière soit réfléchie de chaque surface recouverte d'un miroir, la lumière étant ainsi réfléchie dans trois directions vers trois différents capteurs optiques. L'amplitude de la vibration de l'objet peut ensuite être déterminée dans chacune des trois directions orthogonales, le long de trois axes, par mesure de la différence de position entre la lumière réfléchie et un faisceau de référence.

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