针对小功耗电子设备供电的需求,拟对生活中存在的丰富振动能量进行利用,设计一种以 Galfenol 材料的磁致伸缩逆效应和法拉第电磁感应的耦合特性为实现原理, 以薄片状 Fe-Ga 合金为核心组件, 对振动进行收集并转换为电能的装置。以 Jiles-Atherton 磁化模型为基础, 结合悬臂梁弯曲理论建立了振动能量收集装置的感应电压与应力及力和加速度间的数学关系模型; 分析了振动薄片内部总应力与运动状态间的数学关系。实验表明该装置产生的电压幅值可达到201 mV, 并且在低频段发电效果最佳。研究成果为实现小功耗电子组件的无源供电提供一种新方法。

In order to meet demands of current supply for electronic devices with low power consumption, abundant vibration energy existing in environment will be utilized by mankind.  Here, taking the coupling property between Galfenol material’s magnetostrictive inverse effect and Faraday electromagnetic induction as the realizing principle and flaky Fe-Ga alloy as the core element, a vibrating energy collecting device to collect environment vibration energy and convert it into electric one was designed.  Based on Jiles-Atherton magnetization model and the cantilever beam bending theory, a mathematical relation model among induced voltage, stress, force and acceleration was established to analyze the mathematical relation between the total internal stress in a vibrating strip and its motion state.  Tests showed that the voltage amplitude generated by the device can reach 201mv, and the power generation effect is the best within a low frequency range, the study results provide a new method for realizing the passive power supply of electronic components with low power consumption.