闸墩水管冷却的光纤光栅温度监测及反馈分析

FBG temperature monitoring and feedback analysis of water-pipe cooling in sluice pier

摘要: 将光纤Bragg光栅温度传感技术应用于水闸工程的闸墩进行实时温度监测,同时对该工程进行施工期温度场和应力场反馈分析.将光纤光栅温度传感器串联熔接形成准分布式测温系统,既具有分布式光纤测温的优点,又可克服分布式光纤测温精度不高以及常规仪器点式监测等缺点.由于闸墩混凝土是薄壁结构,其温度特性和应力状态受混凝土浇筑前后几天的气温影响较大,建议结合周天气预报,将光纤光栅温度传感技术与温度场和应力场仿真分析相结合,进行实时在线监测、实时仿真和实时反馈,及时采取合理的温控措施.

Abstract: Fire-new FBG temperature sensor technology is applied in sluice engineering for real-time monitoring of sluice pier's temperature.The sluice engineering's temperature and stress field are feedbacked and analyzed.Quasi-distributed system can be composed by splicing several FBG temperature sensors.It has advantages of distributed temperature system with high precision.Though the sluice pier is a thin-walled concrete structure,the air temperature in sluice pier placement highly influences the sluice pier's tem...