Arrangement for measuring the deformation of an object put under stress.

摘要

In order to measure the deformations of an object (10) subjected to stresses, such as a flywheel rotating at high speed inside an evacuated enclosure (14), pulses of light are directed on to the object. These pulses are emitted by a stroboscope (16) synchronised with the speed of rotation of the object. The stationary images thus formed leave the enclosure through a window (24) and pass through a first lens (26) with a long focal length. A graticule (30) is superimposed in a plane (28) on the full-size real images obtained in this way. The images of the object and the graticule are enlarged by a second lens (32). A video camera (34) associated with a screen (36) and a recorder (38) makes it possible directly to display the images of the deformations undergone by the object and/or to store them in memory.
<IMAGE>