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We introduce the concept of using an RFID tag's antenna to sense surface cracks. Our contribution is two fold. First, we present the design of an inductively coupled loop antenna that can be used as a crack detector. Second, we propose the development of a 2-D grid of tags to improve spatial coverage and discuss how it can be used to monitor typical crack patterns in civil infrastructure. We demonstrate...
This paper presents a printed UHF radio frequency identification (RFID) sensor solution that indicates whether a passive RFID tag has been exposed to a certain degree of humidity. The printed sensor operates as a write-once read-many-times resistive memory as it permanently changes its resistance from about 2 to less than 50 after exposure to humidity or water. The change of the...
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