圧電式振動発電装置の性能向上に関する基礎研究

抄録

We use many small electronic devices such as smart phones. When the disaster occurred and the power grid was damaged, we may not be able to charge up the battery of the electronic device. Therefore, it is necessary to build a generating electricity system by some kind of methods. This study focuses on a vibration energy harvester that one of the energy harvesting. The experimental device which got energy by a steel ball colliding with the piezoelectric elements was produced. Electric power generation of the vibration energy harvester is low. This study focuses on finding the conditions that lead to improve power generation efficiency. By vibration experiment, it is found that the generated voltage of vibration energy harvester is change by a steel ball being caught between the piezoelectric elements. Therefore, we attached a stopper to experimental devices. The generated voltage was improved by this improvement.