TY - JOUR
T1 - Increase output of vibration energy harvester by a different piezoelectric mode and branch structure design
AU - Qin, Weiyang
AU - Liu, Qi
AU - Wang, Yuansheng
AU - Xie, Zhongliang
AU - Zhou, Zhiyong
N1 - Publisher Copyright:
© 2022 IOP Publishing Ltd.
PY - 2022/12/29
Y1 - 2022/12/29
N2 - In this study, we improve the performance of vibration energy harvesting by adopting a different working mode of piezoelectric material. We propose a harvester that is composed of an inverted beam and a branch structure. The branch can produce an amplified inertial force under vibration and passes it to a lead zirconate titanate (PZT) sheet. The resultant force acts on the PZT sheet as a dynamic normal force, not as a dynamic flexural one in the classical harvester. This change can increase the output significantly. First, the theoretical model is established and solved. The results show that the design can induce a super-harmonic vibration and produce a large output. Then, the validation experiments are carried out. The experimental results prove the occurrence of super-harmonic vibration and show that under weak stochastic excitation the branch structure can promote the electric output significantly. For a stochastic excitation of PSD = 0.06 g2 Hz−1, the average power of the novel harvester can reach 0.344 mW by a small PZT sheet with the dimensions of 24 × 6 × 0.2 m m 3 . This study may provide a novel scheme in improving the vibration energy harvesting efficiency.
AB - In this study, we improve the performance of vibration energy harvesting by adopting a different working mode of piezoelectric material. We propose a harvester that is composed of an inverted beam and a branch structure. The branch can produce an amplified inertial force under vibration and passes it to a lead zirconate titanate (PZT) sheet. The resultant force acts on the PZT sheet as a dynamic normal force, not as a dynamic flexural one in the classical harvester. This change can increase the output significantly. First, the theoretical model is established and solved. The results show that the design can induce a super-harmonic vibration and produce a large output. Then, the validation experiments are carried out. The experimental results prove the occurrence of super-harmonic vibration and show that under weak stochastic excitation the branch structure can promote the electric output significantly. For a stochastic excitation of PSD = 0.06 g2 Hz−1, the average power of the novel harvester can reach 0.344 mW by a small PZT sheet with the dimensions of 24 × 6 × 0.2 m m 3 . This study may provide a novel scheme in improving the vibration energy harvesting efficiency.
KW - amplified inertial force
KW - branch structure
KW - piezoelectric sheet
KW - super-harmonic vibration
KW - vibration energy harvesting
UR - http://www.scopus.com/inward/record.url?scp=85144614567&partnerID=8YFLogxK
U2 - 10.1088/1361-6463/aca774
DO - 10.1088/1361-6463/aca774
M3 - 文章
AN - SCOPUS:85144614567
SN - 0022-3727
VL - 56
JO - Journal of Physics D: Applied Physics
JF - Journal of Physics D: Applied Physics
IS - 3
M1 - 034001
ER -