Paper number 206

EFFECTIVENESS AND OPTIMIZATION OF FIBER BRAGG GRATING SENSOR AS EMBEDDED STRAIN SENSOR

Xiaoming Tao¹, Liqun Tang¹,³, Chung-Loong Choy²

1Institute of Textiles and Clothing, 2Materials Research Centre,
The Hong Kong Polytechnic University
3Dept. of Engineering Mechanics, Traffic and Communications College,
South China University of Technology

Summary

The strain field of a host with an embedded optic fiber is analyzed under a uniform three-principal strain load on the host in order to study the measurement effectiveness of fiber Bragg grating sensor (FBGS) as embedded strain sensor. Three indicators are defined to depict the strain measurement effectiveness of a fiber Bragg grating sensor embedded in a host. The numerical results represent the strain distributions in the host, coating and optic fiber as functions of the elastic modulus of coating and the geometrical parameters of the host. The effects of these parameters on the measurement effectiveness indicators are also studied and the optimal values of these parameters are suggested.

Keywords

fiber Bragg grating sensor, effectiveness, optimization, smart materials.