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NON-CONTACT RF STRAIN SENSOR

  • US 20070186677A1
  • Filed: 02/14/2007
  • Published: 08/16/2007
  • Est. Priority Date: 02/14/2006
  • Status: Abandoned Application
First Claim
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1. A method of monitoring a deflection of a structural member comprising:

  • transmitting a first radio frequency (RF) signal toward a closed circuit comprising an inductance and a capacitance coupled in series, at least one of the inductance and capacitance varying as a function of the deflection of the structural member;

    receiving a second RF signal from the closed circuit;

    determining a resonant frequency of the closed circuit based on the second RF signal; and

    comparing the resonant frequency to a reference resonant frequency to provide an indication of the deflection of the structural member.

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