A new Fiber Bragg Grating sensor based circumferential strain sensor fabricated using 3D printing method

Abstract A new Fiber Bragg Grating (FBG) circumferential strain sensor was fabricated using fused deposition modeling (FDM) method and used to measure the circumferential strain of Rubber cylinders in a uniaxial compression test. Advantages of this FBG based sensor include small size, flexible, low cost, immunity to electromagnetic interference (EMI) and quick prototyping. Calibration test data indicate that the wavelength of FBG strain sensors is linearly proportional to the change of occurred elongation. Measurement sensitivity and resolution of the FBG sensor are 0.0218 nm/mm and 114 μm, respectively. The maximum wavelength difference was 0.0124 nm with a maximum measurement error of 1.59%. The designed new FBG based sensor has shown excellent performance and can be used for both vertical pressure measurements and circumferential strain monitoring.