The objective of this project was to demonstrate the feasibility of using fiber optic Bragg grating sensors (BGS) to measure axial and bending strain in pipes. Work was performed by McDermott Technology Inc. (MTI) and included BGS design and procurement. In addition to the pipe strain testing, a number of other evaluations were performed. Several methods were evaluated to protect and encapsulate the BGS, which are embedded inside an optical fiber, and strain transfer tests were performed on two of the encapsulation approaches. A high strain bending test to failure was performed on one BGS. A ...
The objective of this project was to demonstrate the feasibility of using fiber optic Bragg grating sensors (BGS) to measure axial and bending strain in pipes. Work was performed by McDermott Technology Inc. (MTI) and included BGS design and procurement. In addition to the pipe strain testing, a number of other evaluations were performed. Several methods were evaluated to protect and encapsulate the BGS, which are embedded inside an optical fiber, and strain transfer tests were performed on two of the encapsulation approaches. A high strain bending test to failure was performed on one BGS. A special test section was used to characterize the performance of the BGS and compare to standard electrical resistance foil strain gages.