INSTALLATION FOR MEASURING DEFORMATIONS OF AN OBJECT SUBJECT TO CONSTRAINTS

摘要

P In order to measure the deformations of an object 10 subjected to stresses, such as a flywheel rotating at high speed inside a vacuum chamber 14, light pulses are directed onto this object emitted by a stroboscope 16 synchronized with the speed of rotation of the object. The stopped images thus formed are taken out of the enclosure, through a porthole 24 by a first objective 26 with a long focal length. A reticle 30 is superimposed on the real images at scale 1 thus obtained in a plane 28, and the images of the object and of the reticle are enlarged by means of a second lens 32. A video camera 34 associated with a screen 36 and a recorder 38 makes it possible to directly view and / or keep in memory the images of the deformations undergone by the object. /P