电极配置对悬臂梁压电振子发电能力的影响

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (12) : 129-134.

论文

电极配置对悬臂梁压电振子发电能力的影响

王红艳1,2; 谢涛1; 单小彪1; 袁江波1

作者信息 +

Effect of electrode configuration on electricity generating capacity of piezoelectric cantilever

WANG Hong-yan1,2; XIE Tao1; SHAN Xiao-biao1; YUAN Jiang-bo1

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文章历史 +

摘要

研究了带末端质量块的悬臂梁压电振子多模态振动时的应变分布特点，针对压电陶瓷表面电极配置对压电振子输出电压的影响关系进行压电-电路耦合有限元分析，并建立悬臂梁压电振子发电测试系统，对工作在一阶和二阶谐振频率附近处的压电振子分段电极和连续电极输出功率进行对比分析。研究结果表明，一阶谐振时分段电极的峰值输出功率与连续电极相接近，二阶谐振时分段电极的峰值输出功率增加了900%。相比于连续电极配置法，分段电极配置法可有效提高压电振子在高频振动时的发电能力。

Abstract

The strain distribution characteristic of a piezoelectric cantilever with a tip mass in the multimode vibration is studied in this paper. The effect of the location of electrode pairs on the voltage output of the piezoelectric cantilever is analyzed by the coupled piezoelectric-circuit finite element method. With the aim to measure the electricity generating capacity of the piezoelectric cantilever using the configuration with the segmented electrodes and the continuous electrodes around the first and second resonant frequency, an experiment measuring system was established, and the amplitude of the power output is compared. The results show that the power output of the segmented electrodes is closed to the power output of the continuous electrodes at the first vibration mode, but the peak power output of the segmented electrodes is increased about 900% at the second vibration mode. Compared with the continuous electrodes configuration, the segmented electrodes configuration can result in a significant increase of the electricity generating capacity of the piezoelectric cantilever at high frequency vibration.

导出引用

王红艳;谢涛;单小彪;袁江波 . 电极配置对悬臂梁压电振子发电能力的影响[J]. 振动与冲击, 2011, 30(12): 129-134

WANG Hong-yan;XIE Tao;SHAN Xiao-biao;YUAN Jiang-bo. Effect of electrode configuration on electricity generating capacity of piezoelectric cantilever[J]. Journal of Vibration and Shock, 2011, 30(12): 129-134