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자료유형
학술저널
저자정보
Kim, Changho (Department of Mechanical Engineering, Konkuk University) Ko, Youngsu (Department of Mechanical Engineering, Konkuk University) Kim, Taemin (Department of Mechanical Engineering, Konkuk University) Yoo, Chan-Sei (Electronic Convergence Materials & Device Research Center, Korea Electronics Technology Institute) Choi, BeomJin (Technical Research Center, SENBOL Inc.) Han, Seung Ho (Electronic Convergence Materials & Device Research Center, Korea Electronics Technology Institute) Jang, YongHo (Technical Research Center, SENBOL Inc.) Kim, Youngho (Department of Mechanical Engineering, Konkuk University) Kim, Namsu (Department of Mechanical Engineering, Konkuk University)
저널정보
테크노프레스 Smart structures and systems Smart structures and systems 제22권 제2호
발행연도
2018.1
수록면
133 - 137 (5page)

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Increasing interest in prognostics and health management has heightened the need for wireless sensor networks (WSN) with efficient power sources. Piezoelectric energy harvesters using Pb(Zr,Ti)O3 (PZT) are one of the candidate power sources for WSNs as they efficiently convert mechanical vibration energy into electrical energy. These types of devices are resonated at a specific frequency, which has a significant impact on the amount of energy harvested, by external vibration. Hence, precise prediction of mechanical deformation including modal analysis of piezoelectric devices is crucial for estimating the energy generated under specific conditions. In this study, an experimental vibrational system capable of controlling a wide range of frequencies and accelerations was designed to generate mechanical vibration for piezoelectric energy harvesters. In conjunction with MATLAB, the system automatically finds the resonance frequency of harvesters. A small accelerometer and non-contact laser displacement sensor are employed to investigate the mechanical deformation of harvesters. Mechanical deformation under various frequencies and accelerations were investigated and analyzed based on data from two types of sensors. The results verify that the proposed system can be employed to carry out vibration experiments for piezoelectric harvesters and measurement of their mechanical deformation.

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