The State of the Art: Application of Green Technology in Sustainable Pavement

Figure 4

Piezoelectric transducer examples: (a) cymbal transducer (based on [28]); (b) cantilever transducer (based on [29]); other transducers: (c) cylindrical transducer (based on [30]) and (d) stacked piezoelectric transducers (based on [13]).

(a)

(b)

(c)

(d)