蝴蝶式多层悬臂梁压电发电装置研究

为了提高压电发电装置的发电能力,设计了一种新型的蝴蝶式多层压电悬臂梁。为了研究该装置中每个压电双晶梁的发电性能,建立了在自由端外力作用下压电悬臂梁的输出电压理论模型,以此用来分析压电双晶梁的开路输出电压。制作了多层压电发电装置,并搭建实验平台对装置的发电电压进行实验测试,将实验测试数据与理论计算结果进行比较,两者误差小于10%。将发电装置中的6层压电片串联后研究发现,装置的发电电压基本不变,而发电功率可达单层的6倍,说明该新型蝴蝶式多层压电悬臂梁结构可提高发电能力。

Study on Butterfly Piezoelectric Generator with Multilayer Cantilever Beams

A butterfly piezoelectric generator with multilayer cantilever beams is designed for improving the generating performance of piezoelectric generator.To investigate the generating performance of piezoelectric bimorph beam in the equipment,the output voltage theoretical model of piezoelectric cantilever beam with load on free end is established for analyzing the open circuit output voltage of piezoelectric bimorph beam.The experimental setup is put up and physical device is also fabricated to measure the output voltage.The present theoretical results of multilayer piezoelectric generator coincide well with the related experimental data; the error is less then 10%. After the six layers of piezoelectric generator are in series,the output power can be up to six times that of the single layer,while the output voltage remains the same.It indicates that the novel butterfly multilayer piezoelectric cantilever can significantly improve the generating capacity of piezoelectric generator.