In order to study the ultrasonic vibration generated by industrial instruments and its energy harvesting and conversion mechanism,a sandwich ring-shaped ultrasonic transducer with energy harvesting and conversion functions was designed.The finite element model(FEM)of the transducer is established in ANSYS to analyze the influences of the structural parameters on the vibration characteristics and energy harvesting characteristics.The mechanism model method of ultrasonic vibration energy harvesting was then derived for simulations,whose accuracy was verified by experiments.The results show that when the excitation voltage has amplitude 67 V and frequency 35.2 kHz,the output voltages amplitude of each sector of the harvesting PZT and the solitary pole PZT reach 39 V and 34.4 V,respectively,and the corresponding maximum output powers reach 113 mW and 82.4 mW.The harvesting output power meets the power supplying demand of low-power electronic devices(such as LED lights).The research results also verify the feasibility of ultrasonic vibration energy harvesting.
关键词
超声振动/能量采集/有限元方法/仿真与实验
Key words
ultrasonic vibration/energy harvesting/finite element method/simulation and experiment
维普
万方数据