Cargando…

Experimental Study on Damage Detection in Timber Specimens Based on an Electromechanical Impedance Technique and RMSD-Based Mahalanobis Distance

In the electromechanical impedance (EMI) method, the PZT patch performs the functions of both sensor and exciter. Due to the high frequency actuation and non-model based characteristics, the EMI method can be utilized to detect incipient structural damage. In recent years EMI techniques have been wi...

Descripción completa

Detalles Bibliográficos
Autores principales: Wang, Dansheng, Wang, Qinghua, Wang, Hao, Zhu, Hongping
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5087549/
https://www.ncbi.nlm.nih.gov/pubmed/27782088
http://dx.doi.org/10.3390/s16101765
_version_ 1782463938492891136
author Wang, Dansheng
Wang, Qinghua
Wang, Hao
Zhu, Hongping
author_facet Wang, Dansheng
Wang, Qinghua
Wang, Hao
Zhu, Hongping
author_sort Wang, Dansheng
collection PubMed
description In the electromechanical impedance (EMI) method, the PZT patch performs the functions of both sensor and exciter. Due to the high frequency actuation and non-model based characteristics, the EMI method can be utilized to detect incipient structural damage. In recent years EMI techniques have been widely applied to monitor the health status of concrete and steel materials, however, studies on application to timber are limited. This paper will explore the feasibility of using the EMI technique for damage detection in timber specimens. In addition, the conventional damage index, namely root mean square deviation (RMSD) is employed to evaluate the level of damage. On that basis, a new damage index, Mahalanobis distance based on RMSD, is proposed to evaluate the damage severity of timber specimens. Experimental studies are implemented to detect notch and hole damage in the timber specimens. Experimental results verify the availability and robustness of the proposed damage index and its superiority over the RMSD indexes.
format Online
Article
Text
id pubmed-5087549
institution National Center for Biotechnology Information
language English
publishDate 2016
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-50875492016-11-07 Experimental Study on Damage Detection in Timber Specimens Based on an Electromechanical Impedance Technique and RMSD-Based Mahalanobis Distance Wang, Dansheng Wang, Qinghua Wang, Hao Zhu, Hongping Sensors (Basel) Article In the electromechanical impedance (EMI) method, the PZT patch performs the functions of both sensor and exciter. Due to the high frequency actuation and non-model based characteristics, the EMI method can be utilized to detect incipient structural damage. In recent years EMI techniques have been widely applied to monitor the health status of concrete and steel materials, however, studies on application to timber are limited. This paper will explore the feasibility of using the EMI technique for damage detection in timber specimens. In addition, the conventional damage index, namely root mean square deviation (RMSD) is employed to evaluate the level of damage. On that basis, a new damage index, Mahalanobis distance based on RMSD, is proposed to evaluate the damage severity of timber specimens. Experimental studies are implemented to detect notch and hole damage in the timber specimens. Experimental results verify the availability and robustness of the proposed damage index and its superiority over the RMSD indexes. MDPI 2016-10-22 /pmc/articles/PMC5087549/ /pubmed/27782088 http://dx.doi.org/10.3390/s16101765 Text en © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Dansheng
Wang, Qinghua
Wang, Hao
Zhu, Hongping
Experimental Study on Damage Detection in Timber Specimens Based on an Electromechanical Impedance Technique and RMSD-Based Mahalanobis Distance
title Experimental Study on Damage Detection in Timber Specimens Based on an Electromechanical Impedance Technique and RMSD-Based Mahalanobis Distance
title_full Experimental Study on Damage Detection in Timber Specimens Based on an Electromechanical Impedance Technique and RMSD-Based Mahalanobis Distance
title_fullStr Experimental Study on Damage Detection in Timber Specimens Based on an Electromechanical Impedance Technique and RMSD-Based Mahalanobis Distance
title_full_unstemmed Experimental Study on Damage Detection in Timber Specimens Based on an Electromechanical Impedance Technique and RMSD-Based Mahalanobis Distance
title_short Experimental Study on Damage Detection in Timber Specimens Based on an Electromechanical Impedance Technique and RMSD-Based Mahalanobis Distance
title_sort experimental study on damage detection in timber specimens based on an electromechanical impedance technique and rmsd-based mahalanobis distance
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5087549/
https://www.ncbi.nlm.nih.gov/pubmed/27782088
http://dx.doi.org/10.3390/s16101765
work_keys_str_mv AT wangdansheng experimentalstudyondamagedetectionintimberspecimensbasedonanelectromechanicalimpedancetechniqueandrmsdbasedmahalanobisdistance
AT wangqinghua experimentalstudyondamagedetectionintimberspecimensbasedonanelectromechanicalimpedancetechniqueandrmsdbasedmahalanobisdistance
AT wanghao experimentalstudyondamagedetectionintimberspecimensbasedonanelectromechanicalimpedancetechniqueandrmsdbasedmahalanobisdistance
AT zhuhongping experimentalstudyondamagedetectionintimberspecimensbasedonanelectromechanicalimpedancetechniqueandrmsdbasedmahalanobisdistance