Fig. 1. Structure and working principle of piezoelectric vibration energy harvest（PVEH）

Fig. 2. Energetics model of piezoelectric vibration energy harvest（PVEH）

Fig. 3. Relation curves between displacement transmissibility and excitation frequency at different longitudinal mass

Fig. 4. Relation curves between displacement transmissibility and excitation frequency at different transversal mass

Fig. 5. Magnetic potential cloud map of ring magnet

Fig. 6. Relation curves between radial magnetic force and radial distance with different diameters of magnet

Fig. 7. Relation curves between axial magnetic force andaxial distance with different diameters of magnet

Fig. 8. Experimental prototype of piezoelectric vibration energy harvest

Fig. 9. Piezoelectric vibration energy harvest test system

Fig. 10. Relation curves between output voltage and excitation frequency with different longitudinal mass

Fig. 11. Relation curves between output power and excitation frequency with different longitudinal mass

Fig. 12. Relation curves between output voltage and excitation frequency with different transversal mass

Fig. 13. Relation curves between output power and excitation frequency with different transversal mass

Fig. 14. Relation curves between output voltage and excitation frequency with different transversal magnet spacings

Fig. 15. Relation curves between output power and excitation frequency with different transversal magnet spacings

Fig. 16. Relation curves between output voltage and excitation frequency with different longitudinal magnet spacings

Fig. 17. Relation curves between output power and excitation frequency with different longitudinal magnet spacings

Fig. 18. Relation curves between output voltage and excitation frequency with different vertical magnet spacings

Fig. 19. Relation curves between output power and excitation frequency with different vertical magnet spacings

Fig. 20. Relation curves between output power and load resistance at different excitation frequencies