Aiming at the problem of vibration energy harvesting of overhead transmission wire and energy supply of transmission wire sensor nodes,a piezoelectric energy harvesting system is designed by using piezoelectric cantilever structure.Based on the aeolian vibration theory of overhead transmission wire,an experimental platform for simulating vibration of overhead wire is built.Through experimental research,the influence of the structure of the piezoelectric energy harvesting device on the natural frequency of the system is analyzed,and the output power characteristics of the piezoelectric energy harvesting system under different excitation frequencies,different excitation accelerations and different load conditions are analyzed.The experimental results show that the piezoelectric energy harvesting system is at the resonant frequency and the excitation acceleration reaches 10m/s2,there is an optimal load to make the output voltage reach 16.27 V and the output power reach 5.29 mW,which provides a new idea for solving the energy supply problem of transmission wire sensor nodes.
关键词
架空输电导线/微风振动/压电俘能系统/传感器节点
Key words
overhead transmission wire/aeolian vibration/piezoelectric energy harvesting system/sensor node
维普
万方数据