압전소자를 이용한 에너지 수확에 관한 연구

This paper presents the energy harvesting technique which is carried out by vibration system with a piezoelectric element. In this study, low frequency characteristics of the piezoelectric element bonded to the aluminum cantilever were experimentally investigated. The piezoelectric element of size of 45L×11W×0.6H and piezoelectric constant(d₃₁) of -180×10?¹²C/N was used. The material of cantilever is an aluminum and two kinds of cantilever of which dimensions are (150, 190)[㎜]×13[㎜]×1.5[㎜] were experimented, respectively. The cantilever was fixed on the magnetic type vibrator and the vibrator was operated by power input with a sine wave. The characteristics of frequency and mass variation of cantilever end part such as 0, 2.22, 4.34, 5.87, 8.66, 11.01[g] were investigated. Finally, this paper suggests a method of generating electrical energy with a piezoelectric element using wind, an energy source that is easily applied and from which we can obtain "clean" energy.