(1. 湘潭大学 机械工程学院,湘潭 411105;
2. 上海理工大学 材料科学与工程学院,上海 200093)
摘 要: 利用高剪切压电系数,设计并制作并联结构d15模式PZT-51悬臂梁装置,测量其在不同负载电阻下输出峰-峰值电压和输出功率随频率变化的关系以及不同负载电阻下共振瞬时输出电压和振动激励电压与输出峰-峰值电压关系。当频率为96 Hz、负载电阻为100 kΩ时,该PZT-51悬臂梁装置的输出峰-峰值电压最大值为1.96 V,输出功率达到最大为19.21 μW。随着振动激励电压的增大,并联结构d15模式PZT-51悬臂梁装置的输出峰-峰值电压随之增大,并联结构d15模式PZT-51悬臂梁俘能特性的研究可为设计d15模式压电俘能器提供指导。
关键字: PZT-51陶瓷;悬臂梁;d15模式;并联;剪切压电系数
(1. School of Mechanical Engineering, Xiangtan University, Xiangtan 411105, China;
2. School of Materials Science and Engineering, University of Shanghai for Science and Technology,
Shanghai 200093, China)
Abstract:Utilizing the high shear piezoelectric coefficient of PZT-51 ceramic, the parallel connection device of d15 mode PZT-51 cantilever beam was designed and fabricated. The dependences of output peak-to-peak voltage and output power on frequency were studied at various load resistances. The dependence of peak-to-peak voltage on excitation voltage and the resonance transient output voltage were measured at various load resistances. Maximum output peak-to-peak voltage of 1.96 V and maximum output power of 19.21 μW for PEH with load resistance of 100 kΩ are obtained at frequency of 96 Hz. With increasing vibration excitation voltage, the output peak-to-peak voltage of PEH increases. The proposed structure will provide useful guidelines for the design of d15 mode piezoelectric energy harvesters.
Key words: PZT-51 ceramic; cantilever; d15 mode; parallel connection; shear piezoelectric coefficient