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Structural Damage Detection through EMI and Wave Propagation Techniques Using Embedded PZT Smart Sensing Units

Lead Zirconate Titanate (PZT) sensors have become popular in structural health monitoring (SHM) using the electromechanical impedance (EMI) technique for damage identification. The vibrations generated during the casting process in concrete structures substantially impact the conductance signature’s...

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Autores principales: Gayakwad, Himanshi, Thiyagarajan, Jothi Saravanan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8948667/
https://www.ncbi.nlm.nih.gov/pubmed/35336470
http://dx.doi.org/10.3390/s22062296
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author Gayakwad, Himanshi
Thiyagarajan, Jothi Saravanan
author_facet Gayakwad, Himanshi
Thiyagarajan, Jothi Saravanan
author_sort Gayakwad, Himanshi
collection PubMed
description Lead Zirconate Titanate (PZT) sensors have become popular in structural health monitoring (SHM) using the electromechanical impedance (EMI) technique for damage identification. The vibrations generated during the casting process in concrete structures substantially impact the conductance signature’s (real part of admittance) magnitude and sensitivity. The concept of smart sensing units (SSU) is presented, composed of a PZT patch, an adhesive layer, and a steel plate. It is embedded in the concrete structure to study the impact of damage since it has high sensitivity to detect any structural changes, resulting in a high electrical conductance signature. The conductance signatures are obtained from the EMI technique at the damage state in the 10–500 kHz high-frequency range. The wave propagation technique proposes implementing the novel embedded SSUs to detect damage in the host structure. The numerical simulation is carried out with COMSOL multiphysics, and the received voltage signal is compared between the damaged and undamaged concrete beam with the applied actuation signal. A five-cycle sine burst modulated by a Hanning window is employed as the transient excitation signal. For numerical investigation, six cases are explored to better understand how the wave travels when a structural discontinuity is accounted for. The changes in the received signal during actuator–receiver mode in the damage state of the host structure are quantified using time of flight (TOF). Furthermore, the numerical studies are carried out by combining the EMI-WP technique, which implies synchronous activation of EMI-based measurements and wave stimulation. The fundamental idea is to implement EMI-WP to improve the effectiveness of SSU patches in detecting both near-field and far-field damage in structures. One SSU is used as an EMI admittance sensor for local damage identification. Meanwhile, the same EMI admittance sensor is used to acquire elastic waves generated by another SSU to monitor damages outside the EMI admittance sensor’s sensing area. Finally, the experimental validation is carried out to verify the proposed methodology. The results show that combining both techniques is an effective SHM method for detecting damage in concrete structures.
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spelling pubmed-89486672022-03-26 Structural Damage Detection through EMI and Wave Propagation Techniques Using Embedded PZT Smart Sensing Units Gayakwad, Himanshi Thiyagarajan, Jothi Saravanan Sensors (Basel) Article Lead Zirconate Titanate (PZT) sensors have become popular in structural health monitoring (SHM) using the electromechanical impedance (EMI) technique for damage identification. The vibrations generated during the casting process in concrete structures substantially impact the conductance signature’s (real part of admittance) magnitude and sensitivity. The concept of smart sensing units (SSU) is presented, composed of a PZT patch, an adhesive layer, and a steel plate. It is embedded in the concrete structure to study the impact of damage since it has high sensitivity to detect any structural changes, resulting in a high electrical conductance signature. The conductance signatures are obtained from the EMI technique at the damage state in the 10–500 kHz high-frequency range. The wave propagation technique proposes implementing the novel embedded SSUs to detect damage in the host structure. The numerical simulation is carried out with COMSOL multiphysics, and the received voltage signal is compared between the damaged and undamaged concrete beam with the applied actuation signal. A five-cycle sine burst modulated by a Hanning window is employed as the transient excitation signal. For numerical investigation, six cases are explored to better understand how the wave travels when a structural discontinuity is accounted for. The changes in the received signal during actuator–receiver mode in the damage state of the host structure are quantified using time of flight (TOF). Furthermore, the numerical studies are carried out by combining the EMI-WP technique, which implies synchronous activation of EMI-based measurements and wave stimulation. The fundamental idea is to implement EMI-WP to improve the effectiveness of SSU patches in detecting both near-field and far-field damage in structures. One SSU is used as an EMI admittance sensor for local damage identification. Meanwhile, the same EMI admittance sensor is used to acquire elastic waves generated by another SSU to monitor damages outside the EMI admittance sensor’s sensing area. Finally, the experimental validation is carried out to verify the proposed methodology. The results show that combining both techniques is an effective SHM method for detecting damage in concrete structures. MDPI 2022-03-16 /pmc/articles/PMC8948667/ /pubmed/35336470 http://dx.doi.org/10.3390/s22062296 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Gayakwad, Himanshi
Thiyagarajan, Jothi Saravanan
Structural Damage Detection through EMI and Wave Propagation Techniques Using Embedded PZT Smart Sensing Units
title Structural Damage Detection through EMI and Wave Propagation Techniques Using Embedded PZT Smart Sensing Units
title_full Structural Damage Detection through EMI and Wave Propagation Techniques Using Embedded PZT Smart Sensing Units
title_fullStr Structural Damage Detection through EMI and Wave Propagation Techniques Using Embedded PZT Smart Sensing Units
title_full_unstemmed Structural Damage Detection through EMI and Wave Propagation Techniques Using Embedded PZT Smart Sensing Units
title_short Structural Damage Detection through EMI and Wave Propagation Techniques Using Embedded PZT Smart Sensing Units
title_sort structural damage detection through emi and wave propagation techniques using embedded pzt smart sensing units
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8948667/
https://www.ncbi.nlm.nih.gov/pubmed/35336470
http://dx.doi.org/10.3390/s22062296
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