利用Fe-Ga合金材料收集振动与发电特性的实验研究

Tests for collection of vibration and power generation characteristics with Fe-GA alloy material

随着对无线传感网络、远程健康监测等技术的高需求,振动能量收集得到了显著的发展。设计、研制和实验了一种基于磁致伸缩材料(Fe-Ga合金)的悬臂式新型振动能量收集与发电的装置,通过对环境中的振动能量进行收集进而转换为电能。根据对Fe-Ga合金悬臂梁机械动力学模型分析,建立了系统最大传递效率数学模型,明确了获得最大传递效率的条件;利用李沙育图形法测量确定了系统的前五阶共振频率,通过综合实验明确了振动激励频率和幅值等对系统输出电压的影响规律,提出了通过配装附加质量对系统进行调谐而获得最佳能量转换能力的方法。通过信号接口电路的辅助,样机成功持续点亮了多个LED发光二极管和LED便携电脑键盘灯,进一步验证了样机的可持续发电能力。

With more and more demandsfor technologies, such as, wireless sensor networks and remote health monitoring, vibration energy collectionis significantly developed. Here, a new type cantilevered vibration energy collection and power generation device based on magneto-strictive material Fe-Ga alloy was designed, developed and tested to harvest vibration energy in environment and convert it into electric energy.According to the dynamic model analysis of a Fe-Ga alloy cantilever beam, the mathematical model for the system’s maximum transfer efficiency was established, and the conditions to obtain the maximum transfer efficiency were clarified. The first five orders resonance frequencies of the system were determined with Lissajous graphic method. The influence law of frequency and amplitude of vibration excitation on the output voltage of the system was studied with comprehensive tests. A method to obtain the optimal energy conversion capability by adjusting the system with additional mass was proposed.With the aid of a signal interface circuit, the prototype successfully lighted up multiple LED light-emitting diodes and LED portable computer keyboard lights to further verify the sustainable power generation capability of the prototype.