基于模态分离技术的3×n阵列式低频宽带压电振动发电机的设计研究

doi:10.3969/j.issn.0372-2112.2020.03.019

电子学报 ›› 2020, Vol. 48 ›› Issue (3): 554-560.DOI: 10.3969/j.issn.0372-2112.2020.03.019

基于模态分离技术的3×n阵列式低频宽带压电振动发电机的设计研究

罗翠线¹, 秦敏哲²

1. 山西财经大学信息学院, 山西太原 030006;
2. 阿米检测技术有限公司, 江苏无锡 215000

收稿日期:2019-06-21 修回日期:2019-08-08 出版日期:2020-03-25
- 通讯作者:
- 秦敏哲
- 作者简介:
- 罗翠线 女,1990年出生于陕西咸阳,2018年于太原理工大学获得博士学位,现为山西财经大学信息学院老师,主要从事微能源器件的研究.E-mail:20191008@sxufe.edu.cn
- 基金资助:
- 山西省人才项目 (No.201605D211020）; 山西省高等学校科技创新项目 (No.2019L0473）

A 3×n Element Piezoelectric Vibration Generator with Low Frequency and Wide Bandwidth Exploiting Modes Separation Technique

LUO Cui-xian¹, QIN Min-zhe²

1. College of Information, Shanxi University of Finance and Economics, Taiyuan, Shanxi 030006, China;
2. Am Incorporation for Metrology and Testing Technology Services, Wuxi, Jiangsu 215000, China

Received:2019-06-21 Revised:2019-08-08 Online:2020-03-25 Published:2020-03-25

摘要/Abstract

摘要： 针对传统压电发电机固有频率单一，频率采集范围窄和能量采集效率低等缺陷，且无法满足当前无线传感器在特殊工作环境中所需的宽频带和大功率输出.本文基于模态分离技术提出了一种3×n阵列式压电发电结构，并利用COMSOL有限元仿真软件对其进行仿真分析，优化参数后3×5阵列式采集系统在低于50Hz的频率范围内带宽为15.6Hz.实验测试结果发现3×5阵列式发电机的带宽拓宽至13.8Hz；同时在11Hz的共振频率下，最优负载电阻值为350kΩ时，可获得的最大输出功率为2.12mW；最后测试其半功率（1.05mW）带宽达15.3Hz.本文所提出的模态分离技术使阵列采集系统的带宽明显提高且输出功率增大，这个优异的输出性能使得其在多源、宽频振动环境中具有明显的优势.

关键词: 阵列式发电机, 低频宽带采集器, 压电俘能装置, 振动能量捕获, 模态分离技术

Abstract: Traditional piezoelectric vibration generator has the defects including single natural frequency,narrow work bandwidth and low energy harvesting efficiency,which is unable to meet the wideband and high-power output requirements of wireless sensor in a special environment.A neat 3×n element energy harvester array exploiting multi-vibration modes separation technique,has been designed,fabricated,and characterized.The vibration modes of the 3×n generators have been analyzed by COMSOL software.A considerable wideband of 15.6 Hz in simulation and 13.8 Hz in experiment with 3×5 array energy harvester has been gained in a very low frequency range (below 50 Hz).Experimental results showed that the adjusted 3×5 array harvester could generate the output power of about 2.12 mW at an 11 Hz resonant frequency with the optimum load resistance 350 kΩ.Meanwhile,the half-power (1.05 mW) bandwidth could reach up to 15.3 Hz.The bandwidth and the output power of the array energy harvesting system were significantly improved by exploiting the proposed vibration modes separation technique,in which excellent output performance makes it a distinct advantage in multi-source and broadband vibration environments.

Key words: array generator, low frequency and wide bandwidth harvester, piezoelectric energy capture device, vibration energy harvesting, modes separation technique

中图分类号:

TM619
TM282

罗翠线, 秦敏哲. 基于模态分离技术的3×n阵列式低频宽带压电振动发电机的设计研究[J]. 电子学报, 2020, 48(3): 554-560.

LUO Cui-xian, QIN Min-zhe. A 3×n Element Piezoelectric Vibration Generator with Low Frequency and Wide Bandwidth Exploiting Modes Separation Technique[J]. Acta Electronica Sinica, 2020, 48(3): 554-560.

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基于模态分离技术的3×n阵列式低频宽带压电振动发电机的设计研究

A 3×n Element Piezoelectric Vibration Generator with Low Frequency and Wide Bandwidth Exploiting Modes Separation Technique

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