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环境对压电传感器阵列信号的影响及一种补偿损伤成像方法。

Environmental Effects on Piezoelectric Sensors Array Signals and a Compensated Damage Imaging Method.

作者信息

Wang Zhiling, Zhong Yongteng, Zhou Jinyu, Li Chaoyue, Zhong Lina

机构信息

School of Mechanical and Electrical Engineering, Jinling Institute of Technology, Nanjing 211169, China.

College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, China.

出版信息

Materials (Basel). 2021 Nov 9;14(22):6742. doi: 10.3390/ma14226742.

DOI:10.3390/ma14226742
PMID:34832148
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8617824/
Abstract

Piezoelectric sensors array based damage imaging method as a high resolution source localization algorithm is becoming a promising method in structural health monitoring (SHM) technology. However, the environmental variations could affect the gain-phase of array signal. This paper experimentally evaluates the environmental effects on piezoelectric sensors array, and presents a compensated 2D-MUSIC based damage imaging method for composite structures. Firstly, detailed analysis and comparison discussion about the gain-phase difference of array signal when the environmental parameters change, and the gain-phase changes respect to the environmental parameters could be obtained. Secondly, array error matrix is structured and substituted into the steering vector of the original 2D-MUSIC algorithm to compensate. Finally, the compensated 2D-MUSIC algorithm is applied for estimating the initial estimates of damage. After substituting these initial estimates, the cost function is minimized by adaptive iterative calculating the reasonable location of the damage source. The experiments on an epoxy laminate plate demonstrate the validity and effectiveness of the proposed method.

摘要

基于压电传感器阵列的损伤成像方法作为一种高分辨率源定位算法，正成为结构健康监测（SHM）技术中一种很有前景的方法。然而，环境变化会影响阵列信号的增益相位。本文通过实验评估了环境对压电传感器阵列的影响，并提出了一种基于补偿二维多重信号分类（2D-MUSIC）的复合材料结构损伤成像方法。首先，可以获得关于环境参数变化时阵列信号增益相位差以及增益相位随环境参数变化的详细分析和比较讨论。其次，构建阵列误差矩阵并代入原始二维多重信号分类算法的导向矢量进行补偿。最后，应用补偿后的二维多重信号分类算法估计损伤的初始估计值。代入这些初始估计值后，通过自适应迭代计算损伤源的合理位置使代价函数最小化。在环氧层压板上进行的实验证明了该方法的有效性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f1cf/8617824/0903f11c4a10/materials-14-06742-g014.jpg
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Piezoelectric Transducer-Based Structural Health Monitoring for Aircraft Applications.基于压电换能器的飞机结构健康监测。
Sensors (Basel). 2019 Jan 28;19(3):545. doi: 10.3390/s19030545.
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An Advanced Multi-Sensor Acousto-Ultrasonic Structural Health Monitoring System: Development and Aerospace Demonstration.一种先进的多传感器声超声结构健康监测系统：开发与航空航天示范
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