Fiber Bragg Grating Vibrating Sensors and its Signal Processing System

Compares with other sense techniques, fiber Bragg grating sense has its special advantage. In this paper, the theoretical model for measuring the vibration parameters through measuring strain with fiber Bragg grating are explored, and the composition of signal processing system are presented. The vibration testing have been done, two vibration measurement methods of fiber Bragg grating and acceleration transducer are experimentally contrasted. The experiment results indicate that the test data of FBG and accelerometer are anastomotic and are practical for vibration testing of low-frequency vibrational structure.