面向立井提升系统的压电俘能器性能研究

尹黎明; 马天兵; 张志豪; 孙凯恒

面向立井提升系统的压电俘能器性能研究

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出版历程
- 发布日期: 2023-01-19

Performance study of piezoelectric energy harvester for vertical shaft hoisting system

摘要

摘要: 针对立井提升系统罐笼运行中存在不规则低频、宽频振动的特点，提出了一种变截面弯折梁压电振动俘能器，拓宽了俘能器的工作频带，提高俘能器对立井提升系统中不规则低频、宽频振动的能量采集效率。对该俘能器进行结构有限元分析，并搭建实验测试平台，基于仿真和实验，探究其与梯形梁、传统矩形梁发电性能差异，并用该俘能器进行无线节点供能测试。结果表明：变截面弯折梁的应力分布更加均匀，压电材料的整体输出响应更佳；并且共振频率低，开路输出电压高，具有多个明显波峰值，有效实现了采集频带的拓宽；当压电振子末端弯折角度为40°，附加质量为2.14 g时，在标准能量接口电路、最优负载电阻为80 kΩ下，俘能器的最大负载输出电压为34.4 V，输出最大功率可达14.7 mW。通过对无线节点的供电测试，验证了其能量转换效率和供能可行性，可为矿用无线网络节点供电。
- 立井提升 /
- 压电 /
- 俘能器 /
- 拓宽频带 /
- 供电技术
Abstract: For the characteristics of irregular low-frequency and broad-frequency vibration in the operation of the cage of vertical shaft hoisting system, a variable-section bending beam piezoelectric vibration harvester is proposed to broaden the operating band of the harvester and improve the energy collection efficiency of the harvester for irregular low-frequency and broad-frequency vibration in the vertical shaft hoisting system. The structural finite element analysis of the harvester was carried out, and the experimental test platform was built. Based on simulation and experiment, the difference of the power generation performance between the harvester and the trapezoidal beam and the traditional rectangular beam was explored, and the energy supply test was carried out with the energy harvester. The results show that the strain of the beam is more uniform and the overall output response of piezoelectric material is better. At the same time, the resonance frequency is low, the open circuit output voltage is high, and there are many obvious peak values, which can effectively realize the broadening of acquisition frequency band. When the end bending angle of the piezoelectric vibrator is 40°, and the additional mass is 2.14 g, the maximum load output voltage of the harvester is 34.4 V and the maximum output power can reach 14.7 mW under the standard energy interface circuit and the optimal load resistance is 80 kΩ. The power supply test of the wireless node verifies its energy conversion efficiency and feasibility of energy supply, which can meet the power supply requirements of the wireless low-power sensor for mining.
- vertical shaft lifting /
- piezoelectricity /
- energy harvester /
- broaden frequency band /
- power supply technology

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参考文献(10)

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