Crack Detection Using Fiber Optic Distributed Sensor with High
Spatial Resolution
By H. Kumagai, H. Iwaki, S.S.L. Ong and K. Hotate
Concrete Jounal, Vo.41, No.7, Jul. 2003
- Synopsis
- Fiber optic sensors based on Brillouin scattering is advantageous since they can obtain a continuous strain distribution in structures. Conventional pulse-based Brillouin optical sensors have typical spatial resolutions of about 1 m, and are unsuitable for crack detection. In this report, we have successfully applied a Brillouin optical correlation domain analysis based fiber optic strain sensor for crack detection in concrete specimens. The crack width estimated using this sensor was in good agreement with displacement gauge reading.
- Keywords:
- fiber optic sensor, stimulated Brillouin scattering, spatial resolution, crack width
