当前位置: X-MOL 学术Struct. Health Monit. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A novel T-shaped sensor cluster for acoustic source localization
Structural Health Monitoring ( IF 5.7 ) Pub Date : 2021-04-05 , DOI: 10.1177/14759217211004236
Qiang Gao 1, 2 , Jun Young Jeon 1 , Gyuhae Park 1 , Yunde Shen 2 , Jiawei Xiang 2
Affiliation  

This study proposes a new sensor cluster configuration for localizing an acoustic source in a plate using uniform linear array beamforming and T-shaped sensor clusters. This technique requires neither the properties of the plate material nor a dense array of sensors to find the direction of arrival of the acoustic source. It functions by placing four sensors in a cluster in the shape of the letter “‘T” over a small region of the plate. Uniform linear array beamforming-based source localization is carried out by the constructive interference of different sensor signals. However, this approach has the disadvantage of a very low resolution when the direction of arrival approaches certain values. The L-shaped sensor clusters use the information from the time difference of arrival between the sensors to estimate the direction of arrival, which has a high resolution in all directions except for the direction that is very close to vertical to the cluster. In this study, we numerically and experimentally demonstrate that the proposed T-shaped sensor cluster can accurately localize the acoustic source with no blind area. We also detail its superior performance compared to both uniform linear array beamforming and L-shaped clusters. In the experimental investigation, the maximum deviation of impact source localization was reduced significantly, from 54° to 4° for an aluminum plate, and from 42° to 3° for a composite plate. Furthermore, this novel combined sensor array layout requires only a few sensors, which can significantly reduce the cost of structural health monitoring practice.



中文翻译:

用于声源定位的新型T形传感器集群

这项研究提出了一种新的传感器簇配置,用于使用均匀的线性阵列波束成形和T形传感器簇来定位板中的声源。该技术既不需要板材的属性,也不需要密集的传感器阵列来找到声源的到达方向。它通过将四个传感器以字母“ T”的形状成簇放置在板的一小块区域上而发挥作用。统一线性阵列基于波束成形的源定位是通过不同传感器信号的相长干涉实现的。但是,这种方法的缺点是,当到达方向接近某些值时,分辨率会非常低。L形传感器集群使用传感器之间的到达时间差中的信息来估计到达方向,除了非常接近垂直于群集的方向之外,它在所有方向上都具有高分辨率。在这项研究中,我们通过数值和实验证明了所提出的T形传感器簇可以准确地定位声源,而没有盲区。与均匀线性阵列波束成形和L形簇相比,我们还详细介绍了其优越的性能。在实验研究中,冲击源定位的最大偏差已显着降低,铝板从54°降至4°,复合板从42°降至3°。此外,这种新颖的组合传感器阵列布局仅需要几个传感器,这可以显着降低结构健康监测实践的成本。在这项研究中,我们通过数值和实验证明了所提出的T形传感器簇可以准确地定位声源,而没有盲区。与均匀线性阵列波束成形和L形簇相比,我们还详细介绍了其优越的性能。在实验研究中,冲击源定位的最大偏差已显着降低,铝板从54°降至4°,复合板从42°降至3°。此外,这种新颖的组合传感器阵列布局仅需要几个传感器,这可以显着降低结构健康监测实践的成本。在这项研究中,我们通过数值和实验证明了所提出的T形传感器簇可以准确地定位声源,而没有盲区。与均匀线性阵列波束成形和L形簇相比,我们还详细介绍了其优越的性能。在实验研究中,冲击源定位的最大偏差已显着降低,铝板从54°降至4°,复合板从42°降至3°。此外,这种新颖的组合传感器阵列布局仅需要几个传感器,这可以显着降低结构健康监测实践的成本。与均匀线性阵列波束成形和L形簇相比,我们还详细介绍了其优越的性能。在实验研究中,冲击源定位的最大偏差已显着降低,铝板从54°降至4°,复合板从42°降至3°。此外,这种新颖的组合传感器阵列布局仅需要几个传感器,这可以显着降低结构健康监测实践的成本。与均匀线性阵列波束成形和L形簇相比,我们还详细介绍了其优越的性能。在实验研究中,冲击源定位的最大偏差已显着降低,铝板从54°降至4°,复合板从42°降至3°。此外,这种新颖的组合传感器阵列布局仅需要几个传感器,这可以显着降低结构健康监测实践的成本。

更新日期:2021-04-05
down
wechat
bug