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1. (WO2017182761) SYSTEM AND METHOD FOR INSPECTING A STRUCTURE WITH CODA ACOUSTIC WAVES

Pub. No.:    WO/2017/182761    International Application No.:    PCT/FR2017/050946
Publication Date: Fri Oct 27 01:59:59 CEST 2017 International Filing Date: Sat Apr 22 01:59:59 CEST 2017
IPC: G01N 29/04
G01N 29/06
G01N 29/24
G01N 29/50
Applicants: SAFRAN
Inventors: DUCOUSSO, Mathieu, Loïc
Title: SYSTEM AND METHOD FOR INSPECTING A STRUCTURE WITH CODA ACOUSTIC WAVES
Abstract:
The invention relates to a system intended to inspect a structure (1) with coda acoustic waves, via a given surface (S) that is accessible from the exterior of the structure, said system including: means (4) that are arranged to acoustically excite said structure (1) at at least one set excitation point (Pe1) of the given surface (S) with an ultrasonic pulse of set form; means (6, 7, 8) that are arranged to measure vibrations at at least three set measurement points (Pmi) on the given surface (S), during a time window set with respect to the ultrasonic pulse; electronic means (9) that are arranged to exploit the vibration measurements delivered by said measuring means (6, 7, 8) in order to define an indication (Pd) in said structure of at least one possible defect (2) using a coda acoustic-wave signal at each of said measurement points (Pmi), said system being characterised in that the measuring means (6, 7, 8) are arranged to perform the measurements in air and without contact with the structure (1). The invention also relates to a method corresponding to the implementation of said system.