Three different fibre Bragg grating strain sensors were tested for their suitability for measuring high strain. The sensor types were: a bare epoxied fibre Bragg grating, a standard fibre Bragg grating epoxied into a metal capillary and, finally, a metal coated fibre Bragg grating brazed into a metal capillary. The sensors were calibrated on a steel specimen up to 1400MPa (equivalent to 7.3mε). The results show that the bare epoxied Bragg grating and the metal packaged grating are suitable for measuring strains of this level.
|Title of host publication||25th International Conference on Optical Fiber Sensors|
|Place of Publication||Bellingham, WA|
|Number of pages||4|
|Publication status||Published - 23 Apr 2017|
- Bragg grating
- brazed metals
- epoxied fibre