材料封装型光纤布拉格光栅宽温域应变传感性能研究  

Strain Sensing Performance of Material Packaged Fiber Bragg Grating in Wide Temperature Range

作　　者：冯德全 罗小东[2] 樊伟[1,2] 朱宝辉 乔学光 Feng Dequan;Luo Xiaodong;Fan Wei;Zhu Baohui;Qiao Xueguang(School of Physics,Northwest University,Xi'an,Shaanxi 710127,China;Key Laboratory of Photoelectricity Gas-Oil Logging and Detecting,Ministry of Education,Xi'an Shiyou University,Xi'an,Shaanxi 710065,China;Ningxia-Horizontal Titanium Industry Co.,Ltd.,Shizuishan,Ningxia 753000,China)

机构地区：[1]西北大学物理学院,陕西西安710127 [2]西安石油大学光电油气测井与检测教育部重点实验室,陕西西安710065 [3]宁夏中色金航钛业有限公司,宁夏石嘴山753000

出　　处：《光学学报》2021年第21期80-87,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61927812,61735014);陕西省教育厅科研计划(20JS121)。

摘　　要：针对用于高温油气井下的光纤布拉格光栅(FBG)传感器弹性封装材料宽温域应变问题,将奥氏体不锈钢材料和试制的铌基恒弹合金材料设计加工成弹性应变元件,并将FBG粘贴于其上封装成传感器。在30~250℃宽温域范围内对两个传感器施加拉力进行应变传感实验,对比研究了两种材料的应变传感性能。结果表明:两种合金材料在不同温度下的应变响应线性度均超过0.999;但随着温度的升高,两种合金材料的应变响应灵敏度有下降趋势,重复性降低,迟滞增大,温度影响弹性材料的应变传感性能;在30~250℃温度范围内,用试制的铌基恒弹合金材料封装的传感器在重复性、迟滞、线性拟合度和灵敏度稳定性方面均优于奥氏体不锈钢材料封装的传感器。因此试制的铌基恒弹合金可用于宽温域FBG传感器的弹性封装材料。Aiming at the issue of strain of elastic packaging materials for fiber Bragg grating(FBG)sensors used in high-temperature oil and gas wells in a wide temperature range,austenitic stainless steel and trial-produced niobiumbased constant-elastic alloys are designed and manufactured into elastic strain elements,and the FBGs are pasted on them for packaging to make tension sensors respectively.The strain sensing performance of the two materials at 30--250℃is investigated and compared by applying tension to the sensors at different temperatures.The results show that linearity of the tensile response of the two alloy materials at different temperatures is better than 0.999;however,as temperature increases,the tensile response sensitivity decreases,repeatability decreases,and hysteresis increases.Temperature affects the strain sensing performance of the elastic material;in the temperature range of 30--250℃,the sensor packaged using the trial-produced niobium-based constant-elastic alloy is superior than the sensor packaged using the austenitic stainless steel material in terms of repeatability,hysteresis,linearity,and sensitivity stability.Thus,the trail-produced niobium-based constant-elastic alloy can be used as an elastic packaging material for FBG sensors in a wide temperature range.

关 键 词：光纤光学 光纤布拉格光栅 宽温域 弹性材料 铌基合金 传感性能 

分 类 号：TN253[电子电信—物理电子学] TP212[自动化与计算机技术—检测技术与自动化装置]