关于飞行时间卷积神经网络对于非侵入性声学测量的通用性
Abhishek Saini1, John James Greenhall1, Eric Sean Davis1
1Los Alamos National Laboratory, Los Alamos, NM 87544, USA.
Sensors (Basel, Switzerland)
|June 19, 2024
概括
卷积神经网络 (CNN) 可以在复杂的NDE场景中准确测量声学飞行时间 (ToF). 这项研究证实了CNN在有限的数据中具有普遍性,在各种容器大小和噪音条件下显示出强大的性能.
科学领域:
- 非破坏性评估 (NDE) 是一种非破坏性评估.
- 声波的传播声波的传播.
- 机器学习应用程序 机器学习应用程序
背景情况:
- 大波声学飞行时间 (ToF) 测量通常受到容器壁中的引导波的阻碍,特别是在低频率.
- 卷积神经网络 (CNN) 在具有挑战性的非破坏性评估 (NDE) 条件下显示出准确的ToF确定性的希望.
- 对于ToF预测的CNN的概括性,特别是在有限的训练数据下,仍然是一个未经探索的领域.
研究的目的:
- 在管道和封闭容器中分析CNNs用于声学飞行时间 (ToF) 预测的概括性.
- 调查训练数据集大小和数据参数分布对CNN性能的影响.
- 评估ToF-CNN模型的稳定性和更广泛的适用性.
主要方法:
- 研究了基于训练数据集大小和参数 (容器尺寸,材料特性) 的CNN性能变化.
- 在不同的数据集 (小型和大型容器) 上训练模型,以了解可概括性要求.
- 增强数据与噪声来模拟现实世界的实验条件.
主要成果:
- 充分和代表性的培训数据对于跨越输入空间和实现准确的ToF预测至关重要.
- 在较小容器数据集上训练的CNN与在较大的容器上训练的CNN相比显示出更稳定的结果.
- 经过训练的模型在预测不同声速介质的ToF方面表现出色的准确性,并且在噪音数据中表现出色.
结论:
- 在非破坏性评估 (NDE) 中,CNN为准确的声学飞行时间 (ToF) 预测提供了可概括的方法.
- 通过确保训练数据充分代表整个输入参数范围,增强了模型的概括性.
- 拟议的CNN方法论显示了在各种场景中在声学ToF分析中扩展应用的潜力.
相关概念视频
01:26Linear Approximation in Frequency Domain
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear.
01:21Linear Approximation in Time Domain
Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length, the...
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length, the...