Wireless surface acoustic wave corrosion sensor and interrogation system for concrete structures
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United States of America Patent
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Jun 23, 2015
Grant Date -
Feb 14, 2013
app pub date -
Aug 6, 2012
filing date -
Aug 4, 2011
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Abstract
A SAW sensor disposed in on a material. The sensor comprises an antenna having a sacrificial link in at least one antenna element, wherein the sacrificial link is exposed to degrading elements within or on a surface of the material, a SAW transducer responsive to an interrogation signal for generating an incident acoustic wave, a reflector responsive to the incident SAW for creating a reflected SAW, the reflected SAW received by the transducer, the transducer for creating a response signal responsive to the reflected SAW, and the response signal transmitted from the antenna, characteristics of the response signal dependent on a condition of the sacrificial link.
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