基于金属化光纤光栅的温度和应变同时测量

Fiber Bragg grating sensor is sensitive to both strain and temperature simultaneously. The FBG sensors with metal coating can offer higher temperature sensitivity than the normal FBG sensors. There exist strain and exothermic reaction during the contraction of the room temperature curing denture base resin. Based on the nickel coated FBG and the naked FBG, a novel structure is designed to realize the simultaneous measurement of the temperature and the strain for the room temperature curing denture base resin in this paper. The maximum temperature variation occurs at the twenty-first minute during the contraction of the room temperature curing denture base resin. By analyzing the experimental results, the maximum temperature variation ΔT is 12.8℃ and the strain Δε is 2.61με. The research results can be utilized for the clinical treatments.