METHOD AND ACOUSTIC DEVICE FOR LOCATING DEFECTS OF THE MATERIAL CONSTITUTING A PIECE AND ACOUSTIC TRANSMITTER USED IN THIS DEVICE

摘要

The method according to the invention consists first of all in studying the acoustic response of a piece P by recording with acoustic sensors 1, 2, 3, 4 signals emitted by a calibrated acoustic transmitter 5, from a succession of predetermined reference points defining a grid on the surface of the part, while the latter is out of constraint. In a second step, the part is stressed and the acoustic signals are recorded from acoustic events created by this stressing of the part. A processing of the propagation times and amplitudes of the acoustic waves thus recorded during these two times makes it possible to identify the position and the importance of structural defects of the material constituting the part P. / P P Application to the localization defects in parts made of heterogeneous materials such as composite materials. / P