Patent ID: 8805137

Claim:
A sensor comprising: a fiber operable to communicate a light wave; at least first and second Fiber Bragg Gratings disposed along said fiber; a structure operable to be deformed in a plane of deformation, wherein said at least first and second Fiber Bragg Gratings are disposed on opposite sides of said structure in said plane of deformation; a threaded forcing block operable to deform the structure along the plane of deformation; an interrogation unit operable to receive first and second signals corresponding to first and second wavelengths from said at least first and second Fiber Bragg Gratings, wherein the first signal is associated with the first Fiber Bragg Grating and the second signal is associated with the second Fiber Bragg Grating; and a processor operable to derive a difference between the wavelengths of the first and second signals and compare the difference with data correlating wavelength differences to extents of deformation of the structure to yield a current extent of deformation.