Results 41 to 50 of about 363,472 (189)

Effects of Applying Different Resonance Amplitude on the Performance of the Impedance-Based Health Monitoring Technique Subjected to Damage

open access: yesSensors, 2018
Smart materials such as piezoelectric transducers can be used for monitoring the health of building structures. In this study, a structural health monitoring technique known as the electromechanical impedance (EMI) method is investigated.
Wongi S. Na   +3 more
doaj   +1 more source

Sandwich Face Layer Debonding Detection and Size Estimation by Machine-Learning-Based Evaluation of Electromechanical Impedance Measurements

open access: yesSensors, 2023
The present research proposes a two-step physics- and machine-learning(ML)-based electromechanical impedance (EMI) measurement data evaluation approach for sandwich face layer debonding detection and size estimation in structural health monitoring (SHM ...
Christoph Kralovec   +3 more
doaj   +1 more source

Electromechanical Impedance Response of a Cracked Timoshenko Beam

open access: yesSensors, 2011
Typically, the Electromechanical Impedance (EMI) technique does not use an analytical model for basic damage identification. However, an accurate model is necessary for getting more information about any damage.
Cuiqin Wu   +4 more
doaj   +1 more source

A PCA-Based Approach for Very Early-Age Hydration Monitoring of Self-Compacting Concrete Using Embedded PZT Sensors

open access: yesSensors, 2023
This work proposed a novel approach based on principal component analyses (PCAs) to monitor the very early-age hydration of self-compacting concrete (SCC) with varying replacement ratios of fly ash (FA) to cement at 0%, 15%, 30%, 45%, and 60 ...
Qunfeng Liu   +4 more
doaj   +1 more source

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

open access: yesSensors, 2016
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 ...
Dansheng Wang   +3 more
doaj   +1 more source

New Advances in Space SHM Project [PDF]

open access: yesINCAS Bulletin, 2015
This paper is based on a consistent family of experimental data obtained in a national research project. More accurate, specimens representing spacecraft structures, accomplished from aluminum circular plates with PWAS bonded on them were subjected to ...
Adrian TOADER, Ioan URSU, Daniela ENCIU
doaj   +1 more source

A Study of Concrete Slab Damage Detection Based on the Electromechanical Impedance Method

open access: yesSensors, 2014
Piezoelectric lead zirconate titanate (PZT) is being gradually applied into practice as a new intelligent material for structural health monitoring. In order to study the damage detection properties of PZT on concrete slabs, simply supported reinforced ...
Xianyan Hu, Hongping Zhu, Dansheng Wang
doaj   +1 more source

Electromechanical Impedance-based Techniques for Structural Health Monitoring [PDF]

open access: yes, 2018
New developments on electromechanical impedance (EMI) based structure health monitoring techniques are presented in this thesis. Time frequency auto-regressive moving average (TFARMA) model based damage indicator is developed to enhance the sensitivity ...
Fan, Xingyu
core   +1 more source

Rethinking EMI [PDF]

open access: yes, 2021
Due to the competitive edge it confers on students, educational institutions, and non-English speaking nations in a globalized economy, English as a medium of instruction (EMI) has been gaining popularity in tertiary education in non-native English ...

core   +1 more source

Damage Identification in Plate Structures Using Sparse Regularization Based Electromechanical Impedance Technique

open access: yesSensors, 2020
This paper proposes a novel structural damage quantification approach using a sparse regularization based electromechanical impedance (EMI) technique. Minor structural damage in plate structures by using the measurement of only a single surface bonded ...
Xingyu Fan, Jun Li
doaj   +1 more source

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