高温光纤传感器在热结构温度和应变测试中的应用(英文)

Application of high-temperature optical fiber sensor in temperature and strain testing of hot structure

研究了石英光纤传感器在实际高温环境中的应用技术。通过不同粘接剂的选择和工艺研究,试验确定了粘接剂及粘接工艺,提供了一种针对于超高温陶瓷结构的700℃高温连接方法,完成了超高温陶瓷热结构700℃的试验考核,同时测试了不同位置、不同温度下的传感器反射信号。试验结果显示,在高温环境下,结构热应变引起的波长变化与结构应变呈近似的线性关系,应变灵敏系数为0.001 26 nm/με。利用同一传感器实现了高温环境下结构温度和应变的同时监测,为高温热结构健康监测提供了一种新方法。

The application technology of quartz optical fiber sensor in the real-life high-temperature environment was studied.Based on studies of various adhesives agents and manufacturing techniques,the test provides connecting method for ultra-high-temperature ceramic structure at 700 ℃ situation,and specifies adhesive agent and adhesive technique related to the process.The ceramic structure was evaluated at 700 ℃,and signals reflecting from sensors at different locations and different temperatures were examined.The results show that,at high-temperature situation,wavelength change caused by structural thermal strain and by structure strain demonstrates approximate linearity,the strain sensitivity coefficient is 0.001 26 nm/με.The test realizes the concurrent monitoring of structural temperature and strain at high-temperature environment using only one sensor,which provides a new way for hot structure health monitoring in high-temperature environment.