摘要
设计了基于Bragg光纤光栅传感技术的监测系统,当光纤光栅所处环境的温度、应力、应变或其他物理量发生变化时,光栅的周期或纤芯折射率将发生变化,从而使反射光的波长发生变化,通过测量反射光中心波长的变化,就可以获得待测物理量的变化情况.该系统利用薄膜滤波器完成对外界的分布式测量,采用光强度检测,能够实现无缝监测.
Monitoring system is designed based on fiber Bragg grating stain sensor. When the temperature, stress, strain or others physical quantity change, the grating period or grating core refractive index changes, then the wavelength of reflected light changes. The changes of the quantity can be obtained by measuring the change of the centre wavelength. By adopting film filter, the outside distribution measurement is realized, and by adopting light intensity detection, seamless monitoring is also realized.
出处
《物理实验》
北大核心
2010年第2期22-26,共5页
Physics Experimentation
关键词
BRAGG光纤光栅
参考光栅
结构监测
fiber Bragg grating
reference fiber grating
structure monitoring
