使用侧带峰值计数在复合板中的声源定位 - 索引技术
H Alnuaimi1, U Amjad2, T Kundu3
1Department of Civil and Environmental Engineering, Qatar University, Doha, Qatar.
Ultrasonics
|February 22, 2024
概括
本研究引入了一种新的声源定位 (ASL) 方法,用于使用非线性超声波侧带峰值计数指数 (SPC-I) 的复合板. 这种技术可以准确地定位声音源,而不需要信号减弱或到达时间数据.
科学领域:
- 材料科学 材料科学 材料科学
- 声学 声学 在声学上
- 非线性超声波非线性超声波
背景情况:
- 声源定位 (ASL) 对于结构健康监测至关重要.
- 传统的ASL方法通常依赖于信号减弱或到达时间数据,这些数据可能不可靠.
- 复合材料表现出非线性声学行为,可以用于本地化.
研究的目的:
- 开发一种新型的ASL技术,用于orthotropic复合板.
- 使用非线性超声波侧带峰值计数指数 (SPC-I) 进行本地化.
- 消除对信号减弱信息和对材料特性事先知识的需求.
主要方法:
- 一个由25个分散的传感器组成的网络被用来记录来自源的声信号.
- 非线性超声波侧带峰值计数指数 (SPC-I) 是从记录的信号中得出的.
- 一个优化算法处理了SPC-I值,以预测声源位置.
主要成果:
- 拟议的基于SPC-I的ASL技术证明了可行性.
- 通过利用非线性复合材料中随传播距离增加的信号扭曲来实现定位精度.
- 在碳纤维增强 (CFR) 复合板上的实验验证证了该技术的有效性.
结论:
- SPC-I技术提供了一种强大的方法,用于在复合板中定位声源.
- 这种方法通过消除对信号衰减和材料性能的依赖性来简化ASL.
- 该方法对先进的结构健康监测应用有前途.
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