| 悬臂梁压电发电装置的实验研究 |
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| 引用本文： | 袁江波,谢涛,陈维山,肖娜.悬臂梁压电发电装置的实验研究[J].振动与冲击,2009,28(7). |
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| 作者姓名： | 袁江波 谢涛 陈维山 肖娜 |
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| 作者单位： | 哈尔滨工业大学,机电工程学院,哈尔滨,150001 |
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| 基金项目： | 黑龙江省自然科学基金，哈尔滨工业大学科研创新基金资助 |
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| 摘 要： | 为了进行压电陶瓷材料发电性能测试与研究,研制了一套悬臂梁压电振子发电系统.设计了悬臂梁压电振子,并对压电振子进行了有限元分析和电导测试.在此基础上,设计了能量存储电路,并在低频下对悬臂梁压电振子发电性能进行了实验研究.研究结果表明,当悬臂梁压电振子处于谐振频率状态下振动时,输出电压和功率达到最大.输出电压随着负载的增大而增大,输出功率并不随着负载的增大而增大;压电振子存在-个最佳阻抗,当负载与最佳阻抗匹配时,此时压电振子的能量转化效率最高且输出功率最大.利用本实验系统进行压电发电实验测试,当负载为50 kΩ时,压电振子输出电压为7 V;当负载电阻为15 kΩ时,此时的输出功率最大可达到1.4 mW,产生的功率可以满足无线传感器等低耗能产品的供能需求.
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| 关 键 词： | 压电悬臂梁 压电发电 有限元分析 |
Experimental study on electricity-generating capacity for a piezoelectric cantilever |
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| YUAN Jiang-bo,XIE Tao,CHEN Wei-shan,XIAO Na.Experimental study on electricity-generating capacity for a piezoelectric cantilever[J].Journal of Vibration and Shock,2009,28(7). |
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| Authors: | YUAN Jiang-bo XIE Tao CHEN Wei-shan XIAO Na |
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| Abstract: | In order to measure and study electricity-generating performance of a piezoelectric ceramics (PEC), a measuring system for electricity-generating capacity of the PEC was developed. A piezoelectric cantilever was designed and analyzed with finite element analysis(FEA), its conductance was measured using an impedance analyzer. The energy sto- ring circuit was designed, the experimental study was carried out in low frequency. The results showed that the output voltage and power were maximum at the resonance frequency. The output voltage of the piezoelectric cantilever increased with the resistance load. The voltage approached 7V when the resistance load was 50kΩ. Neverthless, the electrical power decreased when the load resistance was further increased. A maximum output power about 1.4 mW could be obtained from the piezoelectric cantilever at the resonance frequency across a resistance load of 15kΩ, this power level was already e- nough for some wireless communication systems. |
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| Keywords: | piezoelectric cantilever electrical energy generation finite element analysis(FEA) |
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