Novel Type of Temperature Self-Compensating Acceleration Transducer Based on OFBG

Recently, optical fiber bragg grating (OFBG) sensors with different functions have been developed and applied in Structure Health Monitoring. This letter introduces a noval acceleration transducer with a characteristic of temperature self-compensating. It is a cantilever structure model with an equal strength beam; two OFBGs are bonded on both the upper and lower surface of the beam. According to the temperature self-compensating principle and acceleration measurement principle shown in this letter, the temperature self-compensating function can be achieved by simple calculations. This type of acceleration transducer has high sensitivity and its measurement range can be easily changed according to the practical requirements.