Multifrequency Piezoelectric Energy Harvester Based on Polygon-Shaped Cantilever Array

Figure 1

Isometric view of the energy harvester: ① clamping bolt; ② clamping frame; ③ M3 bolts for junction between the clamping frame and the harvester; ④ body of the polygon-shaped harvester; ⑤ design of cross-sectional area.