光纤光栅钎焊嵌入金属梁及传感性能研究  

The research for embedding optical fiber Bragg grating in the steel beam and the sensing properties

作　　者：李玉龙[1] 彭星玲[1] 冯艳[1] 张华[1] 

机构地区：[1]南昌大学机电工程学院机器人与焊接自动化重点实验室,南昌330031

出　　处：《光通信技术》2012年第9期30-33,共4页Optical Communication Technology

基　　金：国家自然科学基金(50905082)资助;江西省青年科学家资助项目(2010DQ01000)资助;教育部博士点新教师基金(20103601120005)资助;江西省自然科学基金(2010GQC0129)资助

摘　　要：为了实现金属结构内部温度和应力实时监测,以SnAg共晶合金为钎料将光纤光栅钎焊嵌入了钢质简支梁。分析了嵌入金属梁的光纤光栅温度、压力传感特性;试验监测了简支梁温度、压力与光纤光栅中心波长变化。结果表明,嵌入的光纤光栅中心波长和温度变化与梁所受压力大小都成线性关系,温度传感灵敏度比裸光栅提高了约一倍。For monitoring the inner temperature and stress of a metal structure, the fiber Bragg gratings were embedded in a steel beam by using soldering method with SnAg filler metal. Temperature and stress sensing character of an embedded fiber Bragg grating was analyzed; the sensing experiments were conducted for mon- itoring the temperature and stress change. Results show： （i） the temperature and pressure change verus central wavelength shift of the embedded fiber Bragg gratings feature a linear relation; （ii） the temperature sensitivity of the embedded grating was twice of the bare grating.

关 键 词：光纤光栅 钎焊 光纤智能金属结构 温度和压力传感 

分 类 号：TG454[金属学及工艺—焊接] TP212[自动化与计算机技术—检测技术与自动化装置]