Patent ID: 7347101

Claim:
A system for measuring strain experienced by a structure, said system comprising: a) a sensor including: i) a body having an electromagnetic cavity, said electromagnetic cavity adapted to produce a response signal in response to an interrogation signal, the interrogation signal wirelessly received by the sensor, said body being coupled to said structure to allow said strain to alter the resonance properties of said electromagnetic cavity thereby altering said response signal; and, ii) a coupler coupled to said body, said coupler adapted to transfer said interrogation signal into said electromagnetic cavity and transfer said response signal out of said electromagnetic cavity; and, b) an interrogator being adapted to generate and wirelessly transmit said interrogation signal to said sensor, said interrogator being further adapted to wirelessly receive said response signal, the interrogator having an antenna for transmitting said interrogation signal and receiving said response signal, and a signal generator coupled to said antenna, said signal generator being adapted to generate said interrogation signal.