Electricite De France

Pierre-Louis Filiot

Nicolas Paul

A method for detecting and characterizing defects in a heterogeneous material via ultrasound. The method includes the following steps: emitting ultrasound waves from an emitting ultrasound transducer placed against the material; acquiring, using a receiving ultrasound transducer in various positions relative to the material, a plurality of time signals, representing the amplitude of the sound propagated in the material as a function of time, for a position of the receiving ultrasound transducer; determining a time function representing a spatially averaged power of the time signals that correspond to different positions of the receiving transducer; and&#x2014;normalizing the time signals by the time function so as to obtain normalized time signals. The defects in the material are detected from the normalized tune signal.

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Paris, France

Pierre-Louis Filiot