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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Feature extraction approach insensitive to temperature variations for impedance-based structural health monitoring

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Author(s):
Campos, Fernando de Souza [1] ; de Castro, Bruno Albuquerque [1] ; Budoya, Danilo Ecidir [1] ; Baptista, Fabricio Guimaraes [1] ; Covolan Ulson, Jose Alfredo [1] ; Andreoli, Andre Luiz [1]
Total Authors: 6
Affiliation:
[1] Sao Paulo State Univ UNESP, Sch Engn, Dept Elect Engn, Av Engn Edmundo Carrijo Coube 14-01, Bauru, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: IET Science Measurement & Technology; v. 13, n. 4, p. 536-543, JUN 2019.
Web of Science Citations: 0
Abstract

Structural health monitoring (SHM) based on the electromechanical impedance (EMI) has been pointed out as a promising method for detecting structural damage. However, practical problems such as the effects of temperature variation on the electrical impedance signatures of piezoelectric transducers have made it difficult to effectively apply this method of detecting damage in real structures. Therefore, in order to contribute to the effective application of the EMI method in real structures, this study presents a new feature extraction approach insensitive to temperature variations. The proposed method is based on the Akaike statistical criterion algorithm, which extracts the number of significant resonance peaks from the electrical impedance signatures. Tests were performed on an aluminium bar with different damage sizes and under different temperatures. The experimental results indicate that the proposed method is capable of detecting and quantifying structural damage in environments under temperature variation. (AU)

FAPESP's process: 17/23157-3 - Structural Health Monitoring Using Piezoelectric Transducers Excited with High Frequency Signals
Grantee:Fabricio Guimarães Baptista
Support Opportunities: Regular Research Grants
FAPESP's process: 15/24903-5 - Structural Health Monitoring Systems Based on the Electromechanical Impedance in Applications with Low Signal-to-Noise Ratio
Grantee:Bruno Albuquerque de Castro
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 18/09312-9 - Measurement and signal acquisition techniques from piezoelectric transducers excited with high frequency signals in the structural health monitoring
Grantee:Danilo Ecidir Budoya
Support Opportunities: Scholarships in Brazil - Doctorate