Advanced Fiber-optic Sensor And Its Structural Performance Testing Of Materials

As an advanced sensor, optical fiber sensor has many excellences and its application will be more and broader. The application of the optical fiber sensor to the performance testing of 3-D braided composites and the experimental study of ships are described in this thesis. The contents of this thesis are as followings:1. A Michelson fiber interferometer sensor was developed and its application to the testing of the inner strain of braided composites was studied.2. The Fiber Bragg Grating's (FBG) characteristics under the field of stress and temperature were researched. The strain and temperature coefficients of Fiber Bragg Grating tested by experiment well matched the theoretical coefficients.3. The braided composites co-braided with FBG sensors were developed. Both the inner thermal strain and tension strain of the braided composites were measured successfully by the FBG sensors.4. The application of FBG sensors to model experiment of a great tanker was conducted. Experimental results show the FBG sensors have better performance than the traditional stain gauges.