METHOD FOR DETECTING BY ULTRASOUND DEFECTS IN A MATERIAL

摘要

The invention relates to a method for ultrasonic detection of defects in a material, comprising the following steps: emission of ultrasound from a transducer ultrasonic transmitter placed against the material at an emission position, acquisition, by an ultrasonic receiver transducer placed against the material at the receiving position, of at least one time signal, for each measuring position, determination of a normalization term from the values taken by the time signal during an initial portion of the measurement period corresponding to the reception of ultrasonic waves propagated on the surface of the material; for each measurement position, normalization of the time signal over the measurement time by using the normalization term to obtain a normalized time signal; processing of standard time signals for different measurement positions to detect defects in the material. Figure for the abstract: Figure 2