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在高精度脉冲回声和多重反射超声波测量系统中进行衍射校正,用于流体
Eivind Nag Mosland1, Per Lunde1, Jan Kocbach2
1Department of Physics and Technology, University of Bergen, P.O. Box 7803, N-5020 Bergen, Norway.
The Journal of the Acoustical Society of America
|September 10, 2024
概括
精确的衍射校正对于高精度超声波测量至关重要. 一个通用的有限元衍射校正 (FEDC) 模型显示了在n-way系统中与以活塞为基础的模型的显著偏差.
科学领域:
- 超声波测量系统 超声波测量系统
- 声学计量学 声学计量学
- 非破坏性测试是指非破坏性测试.
背景情况:
- 高精度超声波测量系统需要精确的衍射校正模型.
- 基于混活塞理论的现有模型可能无法完全捕捉复杂的衍射效应.
- 之前的工作为单向系统建立了一个有限元衍射校正 (FEDC) 模型.
研究的目的:
- 为 n 路超声波测量系统 (n=1,2,3,...) 推广有限元衍射校正 (FEDC) 模型.
- 将一般化的FEDC模型与现有的活塞式衍射校正模型进行比较.
- 评估在高精度超声波应用中准确的衍射描述的必要性.
主要方法:
- 对于在流体介质中具有同轴对齐的压电传感器的n-way系统的有限元素衍射校正 (FEDC) 模型的概括.
- 与使用镜面反射和"新源"反射近似的混活塞模型进行比较.
- 在流体中使用两个相同的圆柱形压电磁盘的系统的数值模拟.
主要成果:
- 与活塞型模型相比,一般化的FEDC模型提供了更全面的衍射效应描述.
- 活塞型模型在近距离和远距离场的预测中显示了与FEDC模型的显著偏差.
- 还观察到活塞型模型本身之间的偏差,突出了它们的局限性.
结论:
- 精确的衍射校正,如FEDC模型所提供的,对于高精度超声波测量系统至关重要.
- 衍射模型的选择可以显著影响测量准确性,这取决于系统参数.
- 一般化的FEDC模型为各种超声波测量配置提供了更强大的方法.
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Preparation of Equipment:
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