| Summary: | 碩士 === 清雲科技大學 === 機械工程所 === 101 === Piezoelectric transducers are widely used in electromechanical sensors, actuators, non-destructive testing devices as well as electro-optic modulator etc. Piezoelectric effect is applied to many modern-engineering applications because it expresses the connection between the electrical and mechanical fields. Piezoelectricity describes the phenomenon that the material induces an electric charge when subjected to stress and, conversely, induces strain when the electric field is applied. In this article, the three-layered piezoceramic bimorph with clamped edge (or cantilever) boundary conditions are employed to carried out the analysis of vibration-based piezoceramic energy harvester. The influences of geometric parameters (layer-thickness ratios for metal/ piezoceramic layers) and electrical connecting conditions on the power output for the three-layered piezoceramic bimorph are studied in terms of the finite element simulation. After finishing the finite element calculation, the three-layered piezoceramic bimorph will be employed to perform the power output experimental measurement by the self-arranged experimental setup. It is shown that the numerical calculations performed by the finite element method (FEM) agree well with those obtained by the experimental measurements. The results will provide the relative information for energy harvesters with optimal and compact design.
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