期刊
SMART MATERIALS AND STRUCTURES
卷 24, 期 7, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0964-1726/24/7/075029
关键词
energy harvesting; 1-3 piezoelectric composites; ultrasonic energy; longitudinal waves
资金
- National Natural Science Foundation of China [81201102, 81401424, 81127901]
- Natural Science Foundation Project of CQ CSTC [cstc2012jjA10075, cstc2013jcyjA10081]
- Plan of Top Young Innovative Talents of Chongqing City
Harvesting longitudinal ultrasonic energy from the surroundings has been highlighted as an alternative to conventional batteries. The energy can be used to power portable electronics and wireless sensors operating at remote locations. In this paper, an ultrasonic energy harvester made of a 1-3 piezoelectric composite is proposed. This harvester could convert longitudinal-mode ultrasonic vibrations into electrical energy. A theoretical analysis of a 1-3 piezoelectric composite harvester operating with thickness-stretch modes is performed. The results show that maximum output power dissipated in the load can be achieved when the load resistor is equal to the impedance of the harvester. Under such conditions, two peaks of maximum output power occur at the antiresonance frequency and resonance frequency. An experimental study following the theoretical model confirms the feasibility of extracting certain amounts of ultrasonic vibration energy using a 1-3 piezoelectric composite harvester. Both the experimental and theoretical studies show that the output voltages for different pure resistive loads peak at different operating frequencies. As the pure resistive load increases, the operating frequency varies from the resonance frequency to the antiresonance frequency.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据