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Proceedings Paper

Low-cost passive sensors for monitoring corrosion in concrete structures
Author(s): Ali E. Abu Yosef; Praveenkumar Pasupathy; Sharon L. Wood; Dean P. Neikirk
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Paper Abstract

A passive sensor platform has been developed at the University of Texas at Austin to monitor corrosion of embedded reinforcement in concrete structures. The sensors are powered and interrogated in a wireless manner. Initial sensor designs used a sacrificial corroding steel wire to indicate the risk of corrosion within concrete. The wire was physically connected to the sensor circuitry and passed through the circuit protection layer. Consequently, it allowed contaminants to reach the circuit electric components causing corrosion and limiting the service life of the sensor. A novel sensor configuration that relies on wireless inductive coupling between a resonant circuit and the transducer element is presented. The non-contact design eliminates the breach concern and enhances the durability of the senor. Preliminary test results of the new design will be discussed in this paper.

Paper Details

Date Published: 19 April 2011
PDF: 8 pages
Proc. SPIE 7983, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011, 79831Q (19 April 2011); doi: 10.1117/12.879893
Show Author Affiliations
Ali E. Abu Yosef, The Univ. of Texas at Austin (United States)
Praveenkumar Pasupathy, The Univ. of Texas at Austin (United States)
Sharon L. Wood, The Univ. of Texas at Austin (United States)
Dean P. Neikirk, The Univ. of Texas at Austin (United States)


Published in SPIE Proceedings Vol. 7983:
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011
H. Felix Wu, Editor(s)

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