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Measuring strain in a structure (bridge) with a (temperature compensated) electromagnetic resonator (microwave cavity)

  • US 20050241403A1
  • Filed: 06/26/2003
  • Published: 11/03/2005
  • Est. Priority Date: 07/01/2002
  • Status: Active Grant
First Claim
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1. A system for measuring strain experienced by a structure, said system comprising:

  • a) a sensor including;

    i) a body having an electromagnetic resonator, said electromagnetic resonator adapted to produce a response signal in response to an interrogation signal, said body being coupled to said structure to allow said strain to alter the resonance properties of said electromagnetic resonator thereby altering said response signal; and

    , ii) a coupler coupled to said body, said coupler adapted to transfer said interrogation signal into said electromagnetic resonator and transfer said response signal out of said electromagnetic resonator; and

    , b) an interrogator being adapted to generate and transmit said interrogation signal to said sensor, said interrogator being further adapted to receive said response signal.

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