Results 11 to 20 of about 5,534 (210)

Structural Health Monitoring of Timber Using Electromechanical Impedance (EMI) Technique

Advances in Civil Engineering, 2020
Nowadays, the electromechanical impedance method has been widely used in the field of structural healthy monitoring, especially for the concrete and steel materials.
Fang Han, Quanjing Zhang, Chengfeng Wang, Guangtao Lu, Jinwei Jiang   +4 more
doaj   +1 more source

Digital programming of reciprocity breaking in resonant piezoelectric metamaterials

Physical Review Research, 2023
We demonstrate a digitally controlled piezoelectric metamaterial waveguide leveraging resonant, spatiotem-porally modulated synthetic impedance circuits for programmable reciprocity breaking.
Mustafa Alshaqaq, Christopher Sugino, Alper Erturk   +2 more
doaj   +1 more source

Effect of the Matching Circuit on the Electromechanical Characteristics of Sandwiched Piezoelectric Transducers

Sensors, 2017
The input electrical impedance behaves as a capacitive when a piezoelectric transducer is excited near its resonance frequency. In order to increase the energy transmission efficiency, a series or parallel inductor should be used to compensate the ...
Shuyu Lin, Jie Xu
doaj   +1 more source

Electrical Impedance Spectroscopy for Electro-Mechanical Characterization of Conductive Fabrics

Sensors, 2014
When we use a conductive fabric as a pressure sensor, it is necessary to quantitatively understand its electromechanical property related with the applied pressure.
Tushar Kanti Bera, Youssoufa Mohamadou, Kyounghun Lee, Hun Wi, Tong In Oh, Eung Je Woo, Manuchehr Soleimani, Jin Keun Seo   +7 more
doaj   +1 more source

Implementation of Biomimicry for Detecting Composite Structure Damage Using Impedance-Based Non-Destructive Testing Method

Applied Sciences, 2023
Up to date, biomimicry has aided in designing novel ideas and solving various problems in the field of civil engineering. For example, the concept of a load carrying process from a tree can be used to design an effective bridge.
Yi-Seul Kim, Wongi S. Na
doaj   +1 more source

Study of transient synchrophasors for the development of relay protection and control systems [PDF]

E3S Web of Conferences, 2023
The paper discusses issues of improving control and relay protection systems based on the study and analysis of voltage and current synchrophasors of electromechanical and electromagnetic transient processes.
Mokeev Alexey, Piskunov Sergey
doaj   +1 more source

Probabilistic Neural Network and Fuzzy Cluster Analysis Methods Applied to Impedance-Based SHM for Damage Classification

Shock and Vibration, 2014
Impedance-based structural health monitoring technique is performed by measuring the variation of the electromechanical impedance of the structure caused by the presence of damage.
Lizeth Vargas Palomino, Valder Steffen, Roberto Mendes Finzi Neto   +2 more
doaj   +1 more source

Evaluation of the Influence of Sensor Geometry and Physical Parameters on Impedance-Based Structural Health Monitoring

Shock and Vibration, 2012
Structural Health Monitoring (SHM) is the process of damage identification in mechanical structures that encompasses four main phases: damage detection, damage localization, damage extent evaluation and prognosis of residual life.
L.V. Palomino, K.M. Tsuruta, J.R.V. Mour Jr, D.A. Radea, V. Steffen Jr., D.J. Inman   +5 more
doaj   +1 more source

Adhesive Defect Monitoring of Glass Fiber Epoxy Plate Using an Impedance-Based Non-Destructive Testing Method for Multiple Structures

Sensors, 2017
The emergence of composite materials has revolutionized the approach to building engineering structures. With the number of applications for composites increasing every day, maintaining structural integrity is of utmost importance.
Wongi S. Na, Jongdae Baek
doaj   +1 more source

Piezoelectric Electro-Mechanical Impedance (EMI) Based Structural Crack Monitoring

Applied Sciences, 2020
To detect small cracks in plate like structures, the high frequency characteristics of local dynamics were studied with the piezoelectric electro-mechanical impedance (EMI) method, and damages were monitored by the changes of the EMI.
Tao Wang, Bohai Tan, Mingge Lu, Zheng Zhang, Guangtao Lu   +4 more
doaj   +1 more source