Parsons Behle & Latimer
Radio-frequency-identification-based smart fastener
A system includes a fastener and a magneto-elastic component connected to the fastener, wherein a strain level applied to the magneto-elastic component is a function of a tightness level within a range of tightness levels of the fastener. The system further includes a radio frequency identification (RFID) circuit. The system also includes an antenna electrically connected to the RFID circuit. The system includes a variable inductor circuit electrically connected to the RFID circuit and to the antenna, where an inductance exhibited by the variable inductor circuit is a function of the strain level applied to the magneto-elastic component, where a resonance response frequency of the RFID circuit is a function of the inductance exhibited by the variable inductor circuit, and where a change in the strain level results in a shift in the resonance response frequency.
THE BOEING COMPANY
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G01B G06K B25B G06K H04B G01L B60B H04B G01B G06K
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Hyok J. Chia-Ming Adam E. Donald W.
Song Chang Sorensen Coffland