Application of fiber optic sensor technology in intelligent steel strands

A twisted fiber otic sensor based on intensity modulation is described. The principle, structure of the sensor and the choice of steep strand modules are introduced. The sensor is used to determine the tensile strain and distribution. The experimental results show that the change of the transferring light power has an approximate linear relation with the outer force. The intelligent steel strands with this kind of sensor will have a good application to monitor the concrete crack and deformation distribution in huge structure such as dams and bridges.© (1998) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.