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11 April 2006 Low-cost wireless corrosion and conductivity sensors
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Prototype sensors have been developed to detect the onset of corrosion in steel reinforced concrete using non-invasive techniques. These sensors are designed to be extremely simple and low cost. The sensors are embedded in the concrete and are powered and interrogated through the use of inductively coupled magnetic fields. A new conductivity sensor is proposed, based on the design of the corrosion sensor. The conductivity sensor design is examined using circuit simulations and initial experimental results. Both sensors could be used together in a corrosion monitoring system.
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Matthew M. Andringa, John M. Puryear, Dean P. Neikirk, and Sharon L. Wood "Low-cost wireless corrosion and conductivity sensors", Proc. SPIE 6174, Smart Structures and Materials 2006: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, 61740X (11 April 2006);

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