基于移动终端的复合梁结构压电发电技术研究

发布时间：2019-05-12 11:05

【摘要】：目前,手机已经成为了人们每天都会用到的产品,但智能手机、大屏手机的续航能力差的问题也一直困扰着消费者和手机厂商。本文根据对不同压电发电结构的理论以及实验对比结果,基于悬臂梁压电发电结构创新的提出了一种多振子的复合梁式结构,既能满足宽频谱响应的实际需求,又能通过整体梁的弯曲吸收更多的振动能量并将之传递给压电振子,用有限元仿真分析的方法确定了适应手机振动频率的模型参数并对其进行了产品化的便携式封装设计(手机壳),以及相关电路的设计及实验,具体的研究内容如下:1.对可以用到手机发电的两种压电发电结构,悬臂梁结构与简支梁结构,分别进行了重复测试实验,通过对实验平均结果的比较分析,发现悬臂梁结构的压电振子比较适合手机应用环境。2.为了能将设计的压电发电装置与手机振动频率匹配,达到最好的能量采集效果,本文进行重复实验测试了手机受敲击后的振动频率谱线,其第一个峰值频率点为1600Hz。3.通过对悬臂梁压电振子的实验测试结果与等尺寸的Ansys有限元模型的仿真分析结果的对比,发现无论是压电振子的频率、峰值电压还是峰值位移,仿真结果与实验结果都能很好的吻合,以此验证了Ansys有限元仿真分析软件分析压电发电结构的可行性。4.根据应用实际情况与悬臂梁压电发电结构特点,本文创新性的提出了多振子复合梁压电发电结构,利用Ansys有限元仿真分析软件的辅助设计,分析了不同材料参数和声学参数对系统性能的影响,最终确定了可较好匹配目标频率响应谱线的复合梁结构压电发电装置的参数,并给出了仿真谱线与实验测试对比结果。5.设计出了一套美观、实用、可行的将压电发电装置封装成为一个便携式手机壳的封装方法,给出所有零件的设计图,以及各零件的安装方法,并呈现出手机安装好多振子复合梁结构压电发电手机壳的最终效果设计图。6.根据单片压电振子实验结果,设计一套满足手机充电要求的充电电路,并做相关的测试,以确定设计电路可以完成预期功能。
[Abstract]:At present, mobile phones have become a product that people use every day, but the problem of poor endurance of smartphones and large-screen phones has been perplexing consumers and mobile phone manufacturers. According to the theoretical and experimental results of different piezoelectric power generation structures, a multi-oscillator composite beam structure is proposed based on the innovation of cantilever piezoelectric power generation structure, which can not only meet the actual needs of wide spectrum response. It can also absorb more vibration energy through the bending of the whole beam and transfer it to the piezoelectric oscillator. The model parameters suitable for the vibration frequency of mobile phone are determined by finite element simulation analysis, and the portable packaging design (mobile phone shell) is carried out, as well as the design and experiment of related circuits. The specific research contents are as follows: 1. Two kinds of piezoelectric power generation structures, cantilever beam structure and simply supported beam structure, which can be used to generate electricity by mobile phone, are tested repeatedly, and the average experimental results are compared and analyzed. It is found that the piezoelectric oscillator with cantilever structure is more suitable for mobile phone application environment. 2. In order to match the designed piezoelectric power generation device with the vibration frequency of mobile phone and achieve the best energy acquisition effect, the vibration frequency spectrum line of mobile phone after percussion is tested repeatedly in this paper, and the first peak frequency point is 1600Hz. 3. By comparing the experimental results of the cantilever piezoelectric oscillator with the simulation results of the equal size Ansys finite element model, it is found that the frequency, peak voltage and peak displacement of the piezoelectric oscillator are not only the frequency, peak voltage or peak displacement of the piezoelectric oscillator. The simulation results are in good agreement with the experimental results, which verifies the feasibility of analyzing piezoelectric power generation structure by Ansys finite element simulation analysis software. 4. According to the actual situation of application and the characteristics of cantilever beam piezoelectric power generation structure, the multi-vibrator composite beam piezoelectric power generation structure is innovatively proposed in this paper. The software of Ansys finite element simulation and analysis is used to design the composite beam piezoelectric power generation structure. The effects of different material parameters and acoustic parameters on the performance of the system are analyzed. Finally, the parameters of the piezoelectric power generation device with composite beam structure which can match the frequency response spectral lines of the target are determined, and the comparison results between the simulation spectral lines and the experimental tests are given. 5. A set of beautiful, practical and feasible packaging method of piezoelectric power generation device into a portable mobile phone shell is designed, and the design drawing of all parts and the installation method of each part are given. And presents the mobile phone installed many oscillator composite beam structure piezoelectric power generation mobile phone shell final effect design drawing. 6. According to the experimental results of single-chip piezoelectric oscillator, a set of charging circuit to meet the charging requirements of mobile phone is designed, and the relevant tests are made to make sure that the designed circuit can accomplish the desired function.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM619

【相似文献】