为了解决智能电网环境下输电线有害振动与工况检测传感器的供电及续航问题, 该文设计了一种压电式振动与磁场复合能量收集的防震锤。防震锤的主压电梁收集输电线振动能量, 副压电梁通过安装磁铁收集输电线电流产生的变化磁场能量, 摆脱了传统收集磁场能量时线圈的使用。对收集器进行有限元仿真分析与实验测试。结果表明, 收集器工作频带更宽, 比传统的单梁输出高54%, 主压电悬臂梁最大输出功率可达到874 μW, 副压电梁最大功率可达到683 μW。

A piezoelectric vibration and magnetic field hybrid energy harvesting shockproof hammer was designed to solve the problem of harmful vibration and power supply and endurance of sensors in the smart grid environment. The main piezoelectric beam of the shockproof hammer harvests the vibration energy of the transmission line, and the secondary piezoelectric beam harvests the changing magnetic field energy generated by the current via the magnet installation, avoiding the need for the coil in standard magnetic field energy harvesting. The finite element simulation analysis and experiment test on the harvester are carried out. The results show that the harvester operates in a wider frequency band, which is 54% higher than that of the output of the traditional single beam. The maximum output power of the main piezoelectric cantilever beam can reach 874 μW, and the maximum power of the secondary piezoelectric beam can reach 683 μW.