Study on FBG Vibration Sensor

To overcome the demerits of electromagnetical vibration sensors, the authors, using double- cantilever beam structure, fabricate a fiber Bragg gratings(FBG) vibration sensor based on matching filtering demodulation. This sensor with function of temperature compensation combines vibration sensing and dynamic wavelength demodulation. To study its sensing characteristics the authors have done some experiments and the results show that the sensor has good sensing properties, which can meet the demand of long-term and long-range monitoring for large scale engineering structure.