Rainbow型压电单膜片换能结构负载电压和输出功率分析

给出了一种多方向振动能量收集装置的设计结构.为研究Rainbow型压电单膜片换能结构材料、尺寸参数、负载电阻对其输出功率的影响,根据压电材料的机电耦合方程和弹性力学理论,建立了Rainbow型压电单膜片换能结构负载电压及输出功率的理论模型.对所建理论模型进行了数值计算和验证测试,理论计算结果及测试结果具有较好的一致性,...

Analysis of Load Voltage and Output Power for Rainbow Shape Piezoelectric Monomorph Energy Transferring Elements

A design structure is developed in this article to harvest multi-direction vibration energy with piezoelectric monomorph energy transferring elements. According to the basic equations of piezoelectric materials and their mechanical analysis, the load voltage and output power models of the Rainbow shape piezoelectric monomorph energy transferring elements are established, which are then used to study the relationships between their output power and material shape parameters as well as their load resistance. A prototype of the Rainbow shape piezoelectric monomorph energy transferring elements is designed to validate the models. The results show that the calculation results are consistent with the experimental results, with the error of maximum output power being 5%. Moreover, the output power of the piezoelectric film increases as the length of the metal substrate and the width of the piezoelectric film increase, while it decreases as the width and thickness of the metal substrate and the initial curvature radius of the energy transferring elements increase. The output power of the piezoelectric film reaches maximum and then decreases as the length and thickness of the piezoelectric film increase. Furthermore, beryllium bronze substrate energy transferring elements are found to be superior to steel substrate energy transferring elements.