DURABILITY PERFORMANCE OF VIBRATION-BASED ENERGY HARVESTER

초록

This study aims to identify the durability performance of vibration-based energy harvester which generates the electrical power using the vibration energy of structure. Firstly, we reviewed material and design specifications of energy harvester. To identify the durability performance of energy harvester, we built the test protocol and corresponding the durability performance measuring system. The test protocol is comprised of the PSD(power spectral density) and sine sweep loading, based on IEC 61373 [1]. The former means the random load and the latter is the reference load for measuring the electrical output of energy harvester. Fig. 1 represents the basic concept of block (PSD + Sine sweep) utilized in the test protocol. The corresponding measuring system was built using the dynamic exciter and data acquisition unit. Fig. 2 shows the measured peak voltage during sine sweep loading of energy harvester against the block number. Finally, we could identify the functional failure life using the measured degradation characteristic of energy harvester.