Patent ID: 8126662
Filing Date: 2012-02-28
Classification: G01H

Abstract:
1. In a turbine engine including a blade structure comprising a plurality of blades and blade tip target portions associated with the blades, and a casing surrounding the blade structure, a blade vibration monitor for monitoring blade vibration comprising: a light source; a first illumination conduit having a transmission end for locating adjacent to an interior portion of the casing for projecting an image comprising light energy from the light source onto the blade structure in the turbine, the projected image comprising an axially elongated projected image; a processor for processing reflected light images from the blade tip target portions corresponding to a blade passing event; and a detection conduit having a receptor end for locating adjacent an interior portion of the casing for receiving reflected light images from the blade tip target portions and for conveying the reflected light images to the processor, the receptor end of the detection conduit receiving reflected light images from a plurality of locations along the axially elongated projected image during a blade passing event.