A Study on the Resonance Frequency of the Cross-Shaped Piezoelectric Generator According to Change in Elastic Body Thickness and Tip Mass

Abstract

Over the past few years, research about generating system with piezoelectric ceramics has been conducted. To compensate problem of low generating power than other harvesters, many researchers have studied about piezoelectric generator for obtaining high output. And until now various types of piezoelectric generator has been developed. Cross-shaped piezoelectric generator using only one vibration source has four elastic body legs which have same vibration mode. So they have same resonance frequency under the vibration. Elastic body thickness and tip mass in design parameters influence on the resonance frequency. The parameters have relation to output characteristics. In this paper, the output characteristics depending on the elastic body thickness and tip mass were studied. The elastic body material used here was SUS304 for high output characteristics. As a result, the resonance frequency was decreased with decreasing thickness. The generator is expected to be used as an energy harvest from at vibration source around the human life.

Keywords:

• Piezoelectric ceramics
• cross-shaped piezoelectric generator
• resonance frequency

Acknowledgments

This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MEST) (NO. 2012-0009458).

This work was supported by the⌜Gyeongnam, Changwon Science Research Park Project⌟of the Grant of the Korean Ministry of Education, Science and Technology(2011-0054)