Purpose

This paper demonstrates simulation and experimental analysis of a new compact piezoelectric type vibration energy harvester (PVEH) design comprising a

Methods

The proposed PVEH device consisting PVDF piezoelectric material is designed and fabricated based on the analytic results of the acquired vibration data from an experimental setup used to monitor the condition of shaft. Time, frequency and time-frequency domain analysis such that statistical parameters, Fast Fourier Transform (FFT), and Morlet Wavelet Transform (WT), respectively are employed on acquired vibration signals for the comparative study between a healthy and defective shaft (bent shaft) generated vibration.

Results and conclusions

The experiment-based analysis carried out in this work reveals that the outcomes from these presented shaft condition monitoring techniques collectively provide informative defect identification towards detecting the bend in shaft. The experimental findings also show that the rotational frequency of both healthy and faulty shaft is 25 Hz and peak accelerations are 0.09 g, 0.24 g, respectively. These specific rotational shaft-vibrational-environments were created using a PVEH based experimental setup entailing the proposed -shaped device and consequently outcomes of the device were analyzed. The maximum obtained voltage outputs of the -shaped PVEH device are 141.34 mV and 376.92 mV over input acceleration of 0.09 g and 0.24 g, respectively at 1 MΩ load 25 Hz resonant frequency. And the maximum obtained power outputs from the proposed PVEH device are 19.97 nW and 142.06 nW over input acceleration of 0.09 g and 0.24 g, respectively at 1 MΩ load and 25 Hz resonant frequency.

中文翻译：

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压电能量采集器，专为基于振动能量消除和轴故障诊断的应用而设计

目的

本文展示了一种新型紧凑型压电式振动能量收集器（PVEH）设计的仿真和实验分析，该设计包括一个

方法

基于从用于监测轴状况的实验装置获得的振动数据的分析结果，设计和制造了由PVDF压电材料制成的PVEH装置。对获取的振动信号分别采用时域，时域和时频域分析，以便分别对统计参数，快速傅立叶变换（FFT）和莫雷特小波变换（WT）进行分析，以进行健康轴和故障轴（弯曲轴）之间的比较研究。产生的振动。

结果与结论

在这项工作中进行的基于实验的分析表明，这些提出的轴状况监视技术的结果共同为检测轴弯曲提供了有益的缺陷识别。实验结果还表明，正常轴和故障轴的旋转频率均为25 Hz，峰值加速度分别为0.09 g，0.24 g。这些特定的旋转轴振动环境是使用基于PVEH的实验装置创建的，该实验装置采用了所提出的形状的设备，因此对设备的结果进行了分析。最大获得的电压输出形状为PVEH的器件在输入加速度为0.09 g和0.24 g时分别在1MΩ负载和25 Hz谐振频率下分别为141.34 mV和376.92 mV。在1MΩ负载和25 Hz谐振频率下，在0.09 g和0.24 g的输入加速度下，所建议的PVEH器件获得的最大输出功率分别为19.97 nW和142.06 nW。