Output power of piezoelectric MEMS vibration energy harvesters under random oscillations

14th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Kariya, K.^1 ; Yoshimura, T.^1 ; Murakami, S.^2 ; Fujimura, N.^1

Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Naka-ku, Osaka

599-8531, Japan^1

Technology Research Institute of Osaka Prefecture, 2-7-1 Ayumino, Izumi, Osaka

594-1157, Japan^2

关键词: Cantilever types;    Different frequency;    Environmental vibrations;    Piezoelectric MEMS;    Piezoelectric vibration;    Random oscillations;    Resonance response;    Vibration energy harvesters;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/557/1/012101/pdf
DOI  :  10.1088/1742-6596/557/1/012101

来源: IOP

【 摘 要 】

Environmental vibrations include random oscillations of different frequencies and amplitudes. Energy harvesters recover the energy associated with these vibrations. Properties of the vibrations and output power are characterized for cantilever-type piezoelectric vibration energy harvesters using (100)-orientated BiFeO3films subject to both ideal and random oscillations. The displacement and output power under random oscillations were smaller than those under ideal oscillations. This decrease originates with the decreasing acceleration of the fundamental wave with the spurious component having little influence on the resonance response.