A Methodological Review of Piezoelectric Based Acoustic Wave Generation and Detection Techniques for Structural Health Monitoring
Figure 21
Sensing design using dual PZT transducers. (a) A schematic drawing of a dual PZT transducer; (b) different excitation and sensing combinations; (c) signals measured with sensing configurations illustrated in (b); (d) difference between signal pairs in each of the panes of (c); (e) corresponding signal differences of those illustrated in the panes of (d) but with introduction of a notch in the plate.
