A New Impedance Measurement System for PZT-Based Structural Health Monitoring

2009 ◽  
Vol 58 (10) ◽  
pp. 3602-3608 ◽  
Author(s):  
F.G. Baptista ◽  
J.V. Filho
Keyword(s):  
Structural Health Monitoring ◽  
Measurement System ◽  
Health Monitoring ◽  
Impedance Measurement ◽  
Structural Health

scholarly journals MWCNT-Epoxy Nanocomposite Sensors for Structural Health Monitoring

2018 ◽  
Author(s):  
Omid Sam-DaIiri ◽  
Lisa-Marie Faller ◽  
Mohammadreza Farahani ◽  
Ali Roshanghias ◽  
Hannes Oberlercher ◽  
...  
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Impedance Measurement ◽  
Building Structures ◽  
Adhesive Bonds ◽  
Multi Wall Carbon Nanotubes ◽  
Structural Health ◽  
Nanocomposite Sensors ◽  
Parallel Resistance ◽  
Alternating Voltage

We address Multi-Wall Carbon NanoTubes (MWCNTs) for structural health monitoring in adhesive bonds such as in building structures. MWCNT-loaded composites are employed to sense strain changes under tension load using an AC impedance measurement setup. Different weight percentages of 1, 1.5, 2 and 3 wt.% MWCNT are added to the base epoxy resin using different dispersion times, i.e. 5, 10 and 15 minutes. The equivalent parallel resistance of the specimens is measured by applying an alternating voltage at different frequencies. To determine the mechanical as well as sensory properties, the specimens are subjected to a tensile test with concurrent impedance measurement. Using alternating voltage, a higher sensitivity of the impedance reading can be achieved. Employing these sensors in buildings and combining the readings of a network of such devices can significantly improve the buildings’ safety. Additionally, networks of such sensors can be used to identify necessary maintenance actions and locations.   

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