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Structural Health Monitoring Based on Electrical Impedance of a Carbon Nanotube Neuron

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Abstract:

This paper introduces a new sensor design based on a carbon nanotube structural neuron for structural health monitoring applications. The carbon nanotube neuron is a thin and narrow polymer film sensor that is bonded or deposited onto a structure. The electrochemical impedance (resistance and capacitance) of the neuron changes due to deterioration of the structure where the neuron is located. A network of the long carbon nanotube neurons can form a structural neural system to provide large area coverage and an assurance of the operational health of a structure without the need for actuators and complex wave propagation analyses that are used with other SHM methods. The neural system can also reduce the cost of health monitoring by using biomimetic signal processing to minimize the number of channels of data acquisition needed to detect damage. The carbon nanotube neuron is lightweight and easily applied to the structural surface, and there is no stress concentration, no piezoelectrics, no amplifier, and no storage of high frequency waveforms. The carbon nanotube neuron is expected to find applications in detecting damage and corrosion in large complex structures including composite and metallic aircraft and rotorcraft, bridges, and almost any type of structure with almost no penalty to the structure.

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Periodical:

Key Engineering Materials (Volumes 321-323)

Pages:

140-145

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.321-323.140

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Online since:

October 2006

Authors:

In Pil Kang, Jong Won Lee, Gyeong Rak Choi, Joo Yung Jung, Sung Ho Hwang, Yeon Sun Choi, Kwang Joon Yoon, Mark J. Schulz

Keywords:

Carbon Nanotube (CN), Electrical Impedance, Nanotechnology, Structural Health Monitoring (SHM), Structural Neuron

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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