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相关实验视频

Updated: Jan 8, 2026

Easy and Accurate Mechano-profiling on Micropost Arrays

Easy and Accurate Mechano-profiling on Micropost Arrays

Published on: November 17, 2015

使用匹配场处理和麦克风arraya) 在有限金属板上进行冲击定位.

Allison M King¹, David R Dowling^1,2

¹Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA.

The Journal of the Acoustical Society of America

|December 22, 2025

概括

匹配场处理 (MFP) 精确地将撞击源定位在金属板上,使用空中传递的声音,克服了传统方法的局限性. 这种技术在结构健康监测应用中表现有前途.

科学领域:

声学声学在声学方面
结构健康监测结构健康监测
信号处理信号处理

背景情况:

传统的源本地化方法在结构健康监测中面临复杂几何和波传播的挑战.
准确的冲击源定位对于评估结构完整性至关重要.

研究的目的:

适应通常用于水下声学的匹配场处理 (MFP),以使用空气中的声音将金属板上的冲击源定位.
评估基于物理的模型与MFP一起用于此应用程序的有效性.

主要方法:

将MFP应用于来自麦克风的声学数据,测量通过对板的冲击辐射出来的声音.
开发并使用基于物理学的有限元模型 (无限和有限板) 来模拟声波传播.
在不同的信号噪声比率和模型数据不匹配下调查了定位准确性.

主要成果:

通过使用无限和有限板模型的临时修剪数据,在0.5厘米内实现了局部化错误.
有限板模型在杂的环境中显示出超过80%的定位精度,降至7.5dB的信号噪声比.
多重塑料表现出对中度源特性不匹配的稳定性,但对传感器位置和板厚度偏差的敏感性.

结论:

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Last Updated: Jan 8, 2026

Easy and Accurate Mechano-profiling on Micropost Arrays

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匹配场处理是一种可行的技术,可以通过远程声学测量来定位金属板上的冲击源.

基于物理学的有限元建模提高了定位准确性,特别是在考虑特定的板状特征和边缘效应时.

该研究强调了MFP在先进结构健康监测方面的潜力,并确定了对环境和模型参数的敏感性.