金属化封装光纤光栅传感器超低温特性研究

发布时间：2018-01-22 08:22

  本文关键词： 超声焊接 光纤光栅 超低温传感 温度灵敏度　出处：《激光与红外》2017年06期 　论文类型：期刊论文

【摘要】：传统胶封光纤光栅(Fiber Bragg Grating,FBG)传感器的胶黏剂在超低温环境中存在着板结、与基体间热失配等问题。针对胶封光纤光栅传感器在超低温条件下进行测量的局限性,本文设计一种全金属化封装结构,并采用超声焊接的方法将光纤光栅封装固定于特种铝合金基底表面。在-160~0℃环境下,对两支FBG温度传感器的超低温传感特性进行了实验测试。结果表明,该封装形式的FBG传感器的线性度较好,相关系数均在0.99以上。它们的温度灵敏度系数在线性变化区间平均值分别为27.88 pm/℃和26.17 pm/℃,分别是封装前裸光纤光栅的2.75倍和2.58倍左右,提高了温度灵敏度。此金属化封装的FBG温度传感器的工艺简单,易于实现,可用于超低温恶劣环境下的温度测量。
[Abstract]:The adhesive of the traditional fiber Bragg grating (FBG) sensor is bonded in ultra-low temperature environment. In view of the limitation of the rubber sealed fiber Bragg grating sensor to measure at ultra-low temperature, a kind of all-metallized packaging structure is designed to solve the problem of thermal mismatch between the sensor and the substrate. The fiber Bragg grating package is fixed on the surface of special aluminum alloy substrate by ultrasonic welding. The experimental results of two FBG temperature sensors show that the linearity of the FBG sensor is good. The correlation coefficients are all above 0.99. The average values of their temperature sensitivity coefficients in linear range are 27.88 pm / 鈩，

本文编号：1454200