Development of wearable equipment and piezoelectric vibration energy harvest devices

With the continuous development of micro-electro-mechanical system, integrated circuit and wireless communication technology in recent years, piezoelectric vibration energy harvesting technology has been widely used in the power supply system of different scale electromechanical equipment. In particular, it is closely related to the human life wearable devices which shows the urgent demand of micro energy technology. In this paper, the basic principle and common structure of piezoelectric energy harvesting are reviewed. The main research achievements and progress of piezoelectric energy harvesting for wearable devices are analysed, and the challenges and proposed solutions for the piezoelectric energy harvesters based on wearable devices are discussed. (paper)