【摘要】 实现单个光纤布喇格光栅同时测量应变和温度的实验系统。在该系统中 ,温度变化使光栅的布喇格波长位移 ,应变使反射谱分裂成双峰。结果表明 ,根据光栅的初始布喇格波长和两个分裂的布喇格波长可以同时确定应变和温度的变化。应变和温度灵敏度的实验结果分别为 1 1 72pm/ με和 1 0 78pm/℃。该系统在结构健康监测、智能材料和结构等领域有应用前景。更多还原

【Abstract】 An experimental system for simultaneous measurements of strain and temperature based on a fiber Bragg grating is established. The temperature change shifts the Bragg grating wavelength, and the applying strain splits the reflection spectrum into two peaks in this system. The results show that stain and temperature changes can be simultaneously determined according to the initial Bragg wavelength and two split Bragg wavelengths. Strain and temperature sensitivities are measured to be 1.172 pico-meters per micro-strain and 10.78 pico-meters per Celsius degree, respectively. This system can be used in some sensing areas, such as framework health supervising, smart materials and structures.更多还原