一种基于悬臂梁式压电双晶片的能量收集器设计

Design of An Energy Harvester Based on Cantilever Piezoelectric Bimorph

,从悬臂梁式压电能量收集器结构设计和能量收集电路设计两方面出发,介绍了一种基于悬臂梁式压电双晶片的能量收集器设计。结构设计上,选用矩形结构悬臂梁式基板和矩形结构压电片的组合方式。压电双晶片采用并联连接,共同构成了压电能量收集器结构。从电路设计上,通过四倍增压电路对压电陶瓷片上因振动产生的交流电压进行整流、滤波和升压,并采用芯片Max1811高集成度电池充电器对所得直流电进行存储,获得了可为发光二极管供电的直流电压。电路分析与实验测试表明,设计的能量收集器能够实现对外界振动能量的收集。

In this paper, an energy collector based on a cantilever beam piezoelectric bimorph is introduced. It is described from two aspects of the structure design of the cantilever type piezoelectric energy collector and the design of the energy collection circuit. In the structure design, the combination mode of the rectangular cantilever beam plate and the rectangular structure piezoelectric sheet is selected. The piezoelectric bimorph is connected in parallel, and the piezoelectric energy collector structure is formed together. From the circuit design, four times supercharging circuit is used to rectify, filter and boost the AC voltage caused by vibration on the piezoceramic chip, and use the chip Max1811 high integration battery charger to store the DC electric power, and obtain the DC voltage for the light emitting diode. Circuit analysis and experimental tests show that the designed energy collector can achieve external vibration energy collection.