0～1MPa准静态校准用压力脉冲装置的研究
时间:2018-11-26 10:30 来源:毕业论文 作者:毕业论文 点击:次
| 摘要目前国内外准静态校准装置难以实现对低压力尤其是0.01MPa～1MPa以内的压力进行校准，为了设计能够产生0.01MPa～1MPa压力信号的校准装置，首先提出了采用落锤液压校准装置的想法，根据现有落锤液压标定装置的原理，建立了仿真模型，通过调整落锤的质量、落锤的下落高度以及活塞杆的面积，通过仿真分析，发现能够产生0.01MPa～1MPa半正弦压力信号的落锤液压校准装置存在以下问题：落锤的下落高度过低难以控制；落锤质量过轻、活塞杆面积过小，难以加工，所以否定了该方案。由压电叠堆的逆压电效应得到启发，将压电叠堆置于充满传压介质的谐振腔中，对压电叠堆通以半正弦电信号，从而获得能够产生半正弦信号的激励源。通过对压电叠堆形变和谐振腔产生压力的理论分析和仿真计算，验证了该装置产生0.01MPa～1MPa压力信号的可行性，进而提出了采用基于逆压电效应的半正弦压力脉冲装置的方法。30610 关键词：准静态校准 落锤液压校准装置 压电叠堆 逆压电效应 毕业论文设计说明书外文摘要 Title The study of the 0～1Mpa pressure calibration device used in quasi-static pressure calibration Abstract The low pressure signal especially within 0.01MPa～1MPa is difficulty to be calibrated by the quasi static calibration device at home and abroad, in order to design the quasi static calibration device which can produce the pressure within 0.01MPa～1MPa, the idea of using hydraulic hammer calibration device is put forward, according to the principle of existing hammer hydraulic pressure calibration device，the simulation model is established by adjusting the quality and the drop height of hammer and the area of the piston rod， the hydraulic hammer calibration device which can produce the half sine pressure signal within 0.01MPa～1MPa has some problems when considering the simulation analysis result: the drop height of the hammer is too small to be controlled; the weight of hammer is to light and the piston rod area is too small to be produced, so this idea is denied. The ideal of arranging piezoelectric stack at the bottom of the resonant cavity which is filled with liquid is inspired by the converse piezoelectric effect of piezoelectric stack, achieving the excitation source which can produce the half sine pressure signal is realized by the way of passing the half sine voltage through the piezoelectric stack. Based on the simulation analysis of the piezoelectric pile’s deformation and cavity pressure, the equipment can produce the pressure within 0.01MPa～1MPa, so the idea of constructing the quasi static calibration device by using the theory of the inverse piezoelectric effect is put forward. Keywords quasi-static calibration, hydraulic hammer calibration device, piezoelectric stack, inverse piezoelectric effect 1 绪论 1 1.1 选题的背景和意义 1 1.2 国内外研究现状 2 1.2.1 国外的发展 2 1.2.2 国内的发展 2 1.3 本文的研究内容和章节安排 3 2 基于半正弦压力脉冲的准静态校准方法 4 2.1 冲击波压力传感器准静态校准装置系统的组成 4 2.2 冲击波压力传感系统准静态校准的基本方法 4 2.3 0.01～1MPa落锤液压标定装置可行性分析 4 2.3.1 落锤液压标定装置的工作原理 4 2.3.2 常用落锤液压校准装置的结构 5 2.3.3 0.01～1MPa半正弦压力脉冲可行性分析 6 (责任编辑：qin) |