螺旋倾斜复合技术对光纤布拉格光栅传感器的减敏作用  

Desensitization Effect of Helix-Slant Composite Technology on Fiber Bragg Grating Sensor

作　　者：覃荷瑛[1,2] 霍婷婷[1,2] 朱万旭[2] 

机构地区：[1]广西岩土力学与工程重点实验室,广西桂林541004 [2]桂林理工大学土木与建筑工程学院,广西桂林541004

出　　处：《激光与光电子学进展》2017年第3期77-81,共5页Laser & Optoelectronics Progress

基　　金：桂林理工大学博士启动基金(002401003499)

摘　　要：降低光纤布拉格光栅(FBG)应变传感器的应变灵敏度是解决传感器量程小、无法监测大应变问题的一种重要方法。为了监测构件在使用过程中的应力应变变化,提出了螺旋倾斜式光栅复合技术,建立了光栅实测应变与试样实际应变间的理论关系,在不同螺旋倾角下进行了光栅应变灵敏度的测量试验。试验结果表明,该方法能有效降低光栅应变灵敏度,增大光栅应变测量量程。Reducing the strain sensitivity of fiber Bragg grating （FBG） strain sensor is one important method to solve issues of small measurement range and undeteetable large strain. In order to monitor stress and strain changes of components during use, one composite technology of spiral and slant gratings is proposed. The theoretical relationship between the measured strain by FBG and the actual strain of specimen is established. The measurement experiment of the grating strain sensitivity under different spiral-slant angles is done. The experimental results show that the proposed method can effectively reduce the strain sensitivity of FBG and increase the strain measurement range of FBG.

关 键 词：光纤光学 光纤布拉格光栅 大应变 螺旋倾角 灵敏度 

分 类 号：TN253[电子电信—物理电子学]