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4 April 2012 Improved magneto-inductive waveguide as wireless sensor net for structural health monitoring
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This paper summarizes ongoing work on applying passive magneto-inductive (MI) waveguides as wireless sensor arrays to monitor corrosion in infrastructure systems. The passive uniformly-spaced sensor array provides a low-cost and quick method to detect the onset of corrosion in concrete structures using a noninvasive approach. The embedded sensors communicate with neighboring sensors through inductive coupling. The corrosion information is interpreted based on both frequency and time domain characteristics. Bandpass characteristics in the frequency domain and received reflected time domain waves are investigated to locate the defects along the wireless sensor array. Using the relationship between the relative positions of defects and MI waveguide performances, a new combined technique to determine location of defects has been developed and proven to provide both improved sensitivity and defect location capability.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ye Chen, Praveen Pasupathy, Tanuj Trivedi, Dean P. Neikirk, and Sharon L. Wood "Improved magneto-inductive waveguide as wireless sensor net for structural health monitoring", Proc. SPIE 8347, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2012, 83472H (4 April 2012);

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