Electromechanical Impedance
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Estudo da eficiência do Orbignya oleifera como inibidor verde de corrosão para aço com baixo teor de carbono comparado com inibidor comercial em solução HCl 1M
RESUMO O trabalho visa um estudo comparativo entre a eficiência do óleo de coco babaçu (Orbignya oleifera) utilizado como inibidor verde de corrosão e um inibidor comercial testados em aço ABNT 1020 em meio contendo ácido clorídrico. A avaliação foi realizada utilizando técnicas eletroquímicas de polarização linear aliado ao Método de Extrapola
Matéria (Rio J.). Publicado em: 16/09/2019
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2. Electromechanical Impedance - Based Structural Health Monitoring Instrumentation System Applied to Aircraft Structures and Employing a Multiplexed Sensor Array
ABSTRACT: The electromechanical impedance method has been seen as a promising tool for structural health monitoring regarding different types of structures and purposes. Most importantly, this method can be used in real-time applications. Frequently, massive, high-cost, single-channel impedance analyzers are used to process the time domain data, aiming at ob
J. Aerosp. Technol. Manag.. Publicado em: 2015-09
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3. Architecture of a remote impedance-based structural health monitoring system for aircraft applications
The essence of structural health monitoring (SHM) is to develop systems based on nondestructive inspection (NDI) technologies for continuous monitoring, inspection and detection of structural damages. A new architecture of a remote SHM system based on Electromechanical Impedance (EMI) measures is described in the present contribution. The proposed environmen
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
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4. On The Use of the Electromechanical Impedance and Lamb Waves techniques for Damage Detection on Riveted Structures / Utilização das Técnicas de Impedância Eletromecânica e Ondas de Lamb para Identificação de Dano em Estruturas com Rebites
O presente trabalho tem por objetivo o estudo do desempenho de duas técnicas já conhecidas de monitoramento de integridade estrutural (SHM Structural Health Monitoring) aplicadas à detecção de danos em estruturas metálicas rebitadas, como vigas e painéis aeronáuticos. Ambas as técnicas se servem de materiais piezelétricos para a excitação mecâni
Publicado em: 2009
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5. Structural health monitoring of composite materials subjected to impacts using the electromechanical impedance technique / Monitoramento de integridade estrutural de materiais compostos sujeitos a impactos empregando a técnica da impedância eletromecânica
Nowadays, composite materials have increasingly replaced traditional materials in applications that require improved performance, safety, economy and durability. Nonetheless, such materials exhibit complex damage mechanisms that cannot be easily detected in early stages. Failures can occur during manufacturing, operation or even in the course of maintenance.
Publicado em: 2008
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6. Análise das métricas de dano associadas à técnica da impedância eletromecânica para o monitoramento de integridade estrutural
O conceito básico da técnica de integridade estrutural baseado na impedância tem a ver com o monitoramento da variação da impedância eletromecânica da estrutura, causada pela presença de dano, através de pastilhas de material piezelétrico coladas na superfície da estrutura ou nela incorporadas. A impedância é medida, sendo esta diretamente relac
Publicado em: 2008
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7. SERIES LIMITING CURRENT REACTOR FOR ARC FURNACES / REATOR SÉRIE LIMITADOR DE CORRENTE PARA FORNOS A ARCO
This thesis presents the main electromechanical phenomena, occuring during the operating of an arc furnace, focusing the electric and magnetic ones. It also presents a digital simulation aiming to verify that the utilization of a series limiting current reactor included into the furnace feeding circuit, for arc stabilization purposes, does not reduce its ope
Publicado em: 1997
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8. Vibration pattern of the organ of Corti up to 50 kHz: Evidence for resonant electromechanical force
Electromechanical force derived from the soma of the outer hair cell has long been postulated as the basis of the exquisite sensitivity of the cochlea. The problem with this postulate is that the electrical source and mechanical load for the electromechanical outer hair cell might be severely attenuated and phase-shifted by the electrical impedance of the ce
National Academy of Sciences.
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9. Measurement of fluid viscosity at microliter volumes using quartz impedance analysis
The purpose of this work was to measure viscosity of fluids at low microliter volumes by means of quartz crystal impedance analysis. To achieve this, a novel setup was designed that allowed for measurement of viscosity at volumes of 8 to 10 μL. The technique was based on the principle of electromechanical coupling of piezoelectric quartz crystals. The arran
Springer-Verlag.