Patent ID: 8692562

Claim:
A wireless in-plane strap and displacement sensor, comprising: an electrical conductor adapted to be fixedly coupled to a substrate subject to strain conditions, said electrical conductor having first and second ends and shaped between said first and second ends for storage of an electric field and a magnetic field, said first and second ends remaining electrically unconnected such that said electrical conductor so-shaped defines an unconnected open-circuit having inductance and capacitance wherein, in the presence of a time-varying magnetic field, said electrical conductor so-shaped resonates to generate harmonic electric and magnetic field responses, each of which has a frequency, amplitude and bandwidth associated therewith; at least one electrically unconnected electrode having an end and a free portion extending from said end, wherein said end is adapted to be fixedly coupled to said substrate and said free portion is unencumbered, is parallel to, and is spaced apart from, a portion of said electrical conductor so-shaped, at least some of said free portion further being disposed at a location lying within said magnetic field response so-generated; and a motion guidance structure slidingly engaged with each said free portion for maintaining each said free portion parallel to said portion of said electrical conductor so-shaped.