闫丽, 高世桥, 刘海鹏, 张广义.双端固支式压电俘能器的特性研究[J].压电与声光,2018,40(3):370-373.YAN Li, GAO Shiqiao, LIU Haipeng, ZHANG Guangyi.Study on the Characteristics of Double end Fixed Beam Piezoelectric Energy Harvester[J].PIEZOELECTRICS AND ACOUSTOOPTICS
双端固支式压电俘能器的特性研究
Study on the Characteristics of Double end Fixed Beam Piezoelectric Energy Harvester
  
DOI:10.11977/j.issn.1004-2474.2018.03.016
中文关键词:  双端固支式压电俘能器  理论模型  应变分布  输出性能  对比试验
英文关键词:double end fixed beam piezoelectric energy harvester  theoretical model  strain distribution  output characteristic  contrast test
基金项目:国家“八六三”计划基金资助项目(SS2013AA041104)
作者单位
闫丽, 高世桥, 刘海鹏, 张广义 (北京理工大学 爆炸科学与技术国家重点实验室,北京 100081) 
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中文摘要:
      设计了基于矩形梁和梯形梁两种结构的双端固支式压电俘能器,其较传统的悬臂梁式压电俘能器,具有更高的压电材料利用率,且应变分布更均匀,输出功率更高。针对这两种结构建立了理论模型并进行了分析。结果表明双端固支梯形梁应变更均匀。另外,针对这两种结构设计了对比试验,测量了输出电压及输出功率。这两种结构均可通过串联提高输出性能,与双端固支矩形梁相比,双端固支梯形梁的一阶固有频率降低,其串联输出电压较矩形梁提高22.9%,输出功率提高34.7%。
英文摘要:
      A double end fixed beam piezoelectric energy harvester based on the rectangular beam or trapezoidal beam structure is designed.Compared with the conventional cantilever beam piezoelectric energy harvester, the double end fixed beam piezoelectric energy harvester has higher piezoelectric material utilization, more homogeneous strain distribution and higher output power.The theoretical model for these two kinds of structures is established and analyzed; the result shows that the strain distribution of the double end fixed trapezoidal beam is more uniform than that of the double end fixed rectangular beam. In addition, the contrast test is designed for these two kinds of structures and the output voltage and output power are measured. The output performance of these two kinds of structures can be improved by series. Compared with the double end fixed rectangular beam, the first order natural frequency of the double end fixed trapezoidal beam is significantly lower and the series output voltage is 22.9% higher than that of the rectangular beam and the output power is increased by 34.7%.
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