진동 각도에 따른 유니몰프 압전 캔틸레버의 발전특성연구
Power Generation Characteristics of Uni-morph Piezoelectric Cantilever with Different Vibration Angle
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Energy source of a piezo-electric harvester is vibration. Sources of vibration are machineries operated with high frequencies, con- structions and people operated with low frequencies and etc. In this study, we tried to figure out power generation properties over vibra-tions upon angles of a piezo-cantilever for applying them to movements of the construction and/or people, which are vibration sourcesat low frequencies. A uni-morph cantilever with a 59 mm × 29 mm × 0.2 mm piezo-electric element attached on a 71 mm × 46 mm × 0.25 mm copperplate was used. A spring was attached to the lower side of the cantilever and a mass was attached on the oppositeside. Also, a structure with a specific angle which is an angle in between the ground and the cantilever was prepared and then, connectedto a spring or the cantilever. Then, this structure was divided into the A-type and B-type and excited in the direction of z- axis. After that, the angle between the ground and the cantilever was changed and excited by 1 to 10 Hz upon the existence of a spring and/or a mass to compare power generation properties.
Abstract
Energy source of a piezo-electric harvester is vibration. Sources of vibration are machineries operated with high frequencies, con- structions and people operated with low frequencies and etc. In this study, we tried to figure out power generation properties over vibra-tions upon angles of a piezo-cantilever for applying them to movements of the construction and/or people, which are vibration sourcesat low frequencies. A uni-morph cantilever with a 59 mm × 29 mm × 0.2 mm piezo-electric element attached on a 71 mm × 46 mm × 0.25 mm copperplate was used. A spring was attached to the lower side of the cantilever and a mass was attached on the oppositeside. Also, a structure with a specific angle which is an angle in between the ground and the cantilever was prepared and then, connectedto a spring or the cantilever. Then, this structure was divided into the A-type and B-type and excited in the direction of z- axis. After that, the angle between the ground and the cantilever was changed and excited by 1 to 10 Hz upon the existence of a spring and/or a mass to compare power generation properties.
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