基于分形结构压电振子的设计与实验

Design and Experiment of Piezoelectric Vibrator Based on Fractal Structure

随着无线传感技术的发展,过去的有线供电因为存在较大的不便捷性以及电池寿命较短等缺陷,在很大程度上阻碍了传感器件的发展。环境中有丰富的振动能量,将其转化为电能的微电源研究近年来逐渐深入。目前,能量采集装置能够采集的环境中振动频率较为单一,能量转换效率低。对于这些问题,本文结合分形的结构特点对压电振子进行设计,借助分形自相似性和结构多样化特征提高了能量采集密度,同时也有效扩展了频率响应带宽;对制作成型的分形压电换能器件实施实验测试,实施振动频率和输出电压实验、周期性扫频实验来对此结构的可靠性予以验证。

With the development of wireless sensor technology, the past wired power supply has a lot of inconvenience, and the battery life is short and other defects, to a large extent hindered the development of sensor. There are abundant vibration energy in the environment, and the research of micro power conversion into electrical energy has been gradually deepened in recent years. At present, the vibration frequency of the energy acquisition device is single, and the energy conversion efficiency is low. For these problems, this paper based on the structural characteristics of fractal design of the piezoelectric vibrator, using the fractal self similarity and structure diversity improves the energy collection density, but also effectively expand the frequency response bandwidth; fractal to forming of piezoelectric transducer device implementation test, the implementation of the vibration frequency and the output voltage of the experiment, the periodic frequency sweep experiments to verify the reliability of this structure.