A flextensional piezo-composite structure for energy harvesting applications

Abstract A piezoelectric energy harvester (PEH) consisting of two cymbal electromechanical transducers and a cantilever beam structure designed and manufactured. The PEH under test is a novel design that aims to keep the transducers permanently under compression forces. Keeping the transducers under compression forces increases the life-time of the piezoelectric ceramics. A parametric study was performed in order to select design variables such as beam length and tip mass subject to constraint that the resonance frequency of the system would not exceed 200 Hz. A mathematical model representing the PEH was derived, a finite element (FE) model was built and a parametric study was performed for the optimization of the PEH. The derived mathematical model and the FE model were validated experimentally by the manufactured PEH. DC voltage and power obtained from the PEH were evaluated experimentally for low acceleration levels of 2  g (1  g  = 10 m/s 2 ). The effect of stacking the piezoelectric disks on energy harvesting performance was also evaluated experimentally. The two type of transducers used are cymbals with single layer (C-PZT1) and two-layer-stacked (C-PZT2) PZT 5H (lead zirconate titanate) disks. Under sinusoidal vibrations of 2  g acceleration amplitude, the structure with C-PZT2 transducers (B-PZT2) was able to generate 141.61 μW of power at 153 Hz across a resistive load ( R L ) of 40 kΩ while the one with C-PZT1 transducers (B-PZT1) generated 104.04 μW of power at 166 Hz across an R L of 80 kΩ.

[1]  Shashank Priya,et al.  Design and fabrication of bimorph transducer for optimal vibration energy harvesting , 2010, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[2]  N. G. Stephen,et al.  On energy harvesting from ambient vibration , 2006 .

[3]  F. Peano,et al.  Design and optimization of a MEMS electret-based capacitive energy scavenger , 2005, Journal of Microelectromechanical Systems.

[4]  Jiashi Yang,et al.  Connected Vibrating Piezoelectric Bimorph Beams as a Wide-band Piezoelectric Power Harvester , 2009 .

[5]  Saibal Roy,et al.  A micro electromagnetic generator for vibration energy harvesting , 2007 .

[6]  D. Markley,et al.  Energy Harvesting Using a Piezoelectric “Cymbal” Transducer in Dynamic Environment , 2004 .

[7]  Singiresu S. Rao.  Vibration of Continuous Systems , 2019 .

[8]  L. Meirovitch,et al.  Fundamentals of Vibrations , 2000 .

[9]  D. Inman,et al.  On Mechanical Modeling of Cantilevered Piezoelectric Vibration Energy Harvesters , 2008 .

[10]  K. Uchino,et al.  The "cymbal" electromechanical actuator , 1996, ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics.

[11]  S. H. Kim,et al.  Micromachined PZT cantilever based on SOI structure for low frequency vibration energy harvesting , 2009 .

[12]  Stephen P. Timoshenko,et al.  Vibration problems in engineering , 1928 .

[13]  Einar Halvorsen,et al.  An energy harvester driven by colored noise , 2011 .

[14]  Daniel J. Inman,et al.  Recharging Batteries using Energy Harvested from Thermal Gradients , 2007 .

[15]  Neil M. White,et al.  An electromagnetic, vibration-powered generator for intelligent sensor systems , 2004 .

[16]  Ehab F. El-Saadany,et al.  A wideband vibration-based energy harvester , 2008 .

[17]  Xiaobiao Shan,et al.  Modeling and Improvement of a Cymbal Transducer in Energy Harvesting , 2010 .

[18]  D. Inman,et al.  Comparison of Piezoelectric Energy Harvesting Devices for Recharging Batteries , 2005 .

[19]  Hyeoungwoo Kim,et al.  Consideration of Impedance Matching Techniques for Efficient Piezoelectric Energy Harvesting , 2007, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[20]  R. B. Yates,et al.  Analysis Of A Micro-electric Generator For Microsystems , 1995, Proceedings of the International Solid-State Sensors and Actuators Conference - TRANSDUCERS '95.

[21]  Tao Xie,et al.  Energy harvesting with a slotted-cymbal transducer , 2009 .

[22]  Lei Wang,et al.  Vibration energy harvesting by magnetostrictive material , 2008 .

[23]  Jan M. Rabaey,et al.  A study of low level vibrations as a power source for wireless sensor nodes , 2003, Comput. Commun..

[24]  Norman M. Wereley,et al.  Energy Harvesting Utilizing Single Crystal PMN-PT Material and Application to a Self-Powered Accelerometer , 2009 .

[25]  Rashed Adnan Islam,et al.  High‐Energy Density Ceramic Composition in the System Pb(Zr,Ti)O3–Pb[(Zn,Ni)1/3Nb2/3]O3 , 2006 .

[26]  Yuantai Hu,et al.  A piezoelectric power harvester with adjustable frequency through axial preloads , 2007 .

[27]  K. Uchino,et al.  Piezoelectric Energy Harvesting under High Pre-Stressed Cyclic Vibrations , 2005 .

[28]  Sang-Gook Kim,et al.  DESIGN CONSIDERATIONS FOR MEMS-SCALE PIEZOELECTRIC MECHANICAL VIBRATION ENERGY HARVESTERS , 2005 .

[29]  Chitta Saha,et al.  Modeling and experimental investigation of an AA-sized electromagnetic generator for harvesting energy from human motion , 2008, Smart Materials and Structures.