METHOD FOR ULTRASOUND DETECTION AND CHARACTERISATION OF DEFECTS IN A HETEROGENEOUS MATERIAL

摘要

The invention concerns a method for the ultrasound detection and characterisation of defects in a heterogeneous material, comprising the following steps: - for each of a plurality of probe positions (z), for a plurality of configurations of the multi-element probe (1), emitting ultrasound by at least one transmitting transducer (14) and acquiring a measurement signal by at least one receiving transducer (15), - implementing a focusing algorithm and obtaining, for each probe position (z), an image in which each pixel of the image represents a probed point (w) of the material with which a focused amplitude is associated, - for each probed point (w), determining a measure of central tendency of the amplitude and a function representative of the variability of the amplitude, - for each image, correcting the amplitude, - detecting and characterising the defects in the material based on the corrected images.