title: A piezoelectric micro generator worked at low frequency and high acceleration based on PZT and phosphor bronze bonding.
abstract: Recently, piezoelectric energy harvesters (PEHs) have been paid a lot of attention by many researchers to convert mechanical energy into electrical and low level vibration. Currently, most of PEHs worked under high frequency and low level vibration. In this paper, we propose a micro cantilever generator based on the bonding of bulk PZT wafer and phosphor bronze, which is fabricated by MEMS technology, such as mechanical chemical thinning and etching. The experimental results show that the open-circuit output voltage, output power and power density of this fabricated prototype are 35 V, 321 μW and 8664 μW cm-3at the resonant frequency of 100.8 Hz, respectively, when it matches an optimal loading resistance of 140 kΩ under the excitation of 3.0 g acceleration. The fabricated micro generator can obtain the open-circuit stable output voltage of 61.2 V when the vibration acceleration arrives at 7.0 g. Meanwhile, when this device is pasted on the vibrating vacuum pump, the output voltage is about 11 V. It demonstrates that this novel proposed device can scavenge high vibration level energy at low frequency for powering the inertial sensors in internet of things application.
authors.affiliation: National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Department of Micro/Nano Electronics, Shanghai Jiao Tong University, Shanghai, 200240, China.|Department of Mechanical and Engineering, Nanchang Institute of Technology, Nanchang, 330099, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Tang
authors.affiliation: National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Department of Micro/Nano Electronics, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Yang
authors.affiliation: Department of Mechanical and Engineering, Nanchang Institute of Technology, Nanchang, 330099, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Hou
authors.affiliation: National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Department of Micro/Nano Electronics, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Guimiao
authors.initials: G
authors.lastname: Li
authors.affiliation: National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Department of Micro/Nano Electronics, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Jingquan
authors.initials: J
authors.lastname: Liu
authors.affiliation: National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Department of Micro/Nano Electronics, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Chen
authors.affiliation: National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Department of Micro/Nano Electronics, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Chunsheng
authors.initials: C
authors.lastname: Yang