Francisco Montero de Espinosa Freijo

Piezoelectric Transducers for Structural Health Monitoring: Modelling and Imaging

The use of ultrasonic Lamb waves [1, 2, 3] is emerging as one of the most effective techniques for damage detection in aeronautical structures [4]. The advantage of using these waves is evident as they can propagate over large distances; thus, avoiding moving the transducer over the whole structure as is case with conventional point-by-point measurement techniques. These waves can be excited and detected by a variety of methods, i.e., interdigital transducers (IDTs), fine point contact transducers, air-coupled ultrasonic transducers, laser-generation methods, and wedge transducers.