Method and device for optical measurement of deformations or surface temperatures of aeronautical turbomachine fan blades

摘要

P rocede and measuring device optical deformed or surface temperatures of dawn s for an aeronautical turbomachine fan Method for measuring deformations or temperatures at the surface of at least one fan blade (10) of an aeronautical turbomachine, the blade comprising at least one optical fiber (16, 20) equipped with one or more Bragg gratings (18 ), method comprising the following successive steps: emission from a light source (22) of an optical signal into an input end of the optical fiber, the optical fiber comprising at least a portion of side-scattered fiber (20) coupled to an output end of the optical fiber, and reception in an acquisition module (26) of an optical signal originating from the side-scattered fiber portion and previously filtered by the Bragg gratings (s). Figure for the abstract: Fig. 1.