用于超导导体测试的FBG应变传感器标定研究
Calibration of FBG strain transducers for superconductors testing
杨熙龙 1徐先锋 1陶书 1陶博伟 2马红军 2金环 2韩莹 3施毅2
作者信息
- 1. 中国科学技术大学,合肥 230026;中国科学院合肥物质科学研究院,合肥 230031
- 2. 中国科学院合肥物质科学研究院,合肥 230031
- 3. 安徽理工大学力学与光电物理学院,淮南 232001
- 折叠
摘要
本文提出了一种适用于超导导体测试需求的FBG应变传感器不同温度下的标定方法,将FBG应变传感器采用低温胶水加压固化的方法紧密粘贴于棒状拉伸试样所开设的V型槽内,利用拉力试验机进行台阶式加载标定实验研究,通过中心波长和应变进行拟合,标定得出的FBG应变传感器的应变灵敏度系数.实验测得在室温、液氮、液氦三种温度下应变灵敏度系数分别约为1.199 8、1.203 1和1.120 4,发现FBG应变传感器在固定温度下,波长偏移量与应变呈现线性关系,液氦温度下的应变灵敏度系数小于室温与液氮温度下的应变灵敏度系数.
Abstract
In this paper,a calibration method for FBG strain sensors at different temperatures applicable to conductor testing needs was proposed.The FBG strain sensor was tightly pasted into the V-groove opened by the rod-shaped tensile specimen u-sing low-temperature glue cured under pressure,and the experimental study of step loading calibration was carried out by using a tensile testing machine,and the strain sensitivity coefficients of the FBG strain sensors derived from the calibration were fitted by the centre wavelength and the strain.The strain sensitivity coefficients at room temperature,liquid nitrogen,and liquid helium were measured to be about 1.199 8,1.203 1,and 1.120 4,respectively.It is found that the wavelength offset of the FBG strain sensors shows a linear relationship with the strain at a fixed temperature,and the strain sensitivity coefficients at the temperature of liquid helium are smaller than those at the temperatures of room temperature and liquid nitrogen.
关键词
光纤布拉格光栅/标定/应变灵敏度系数Key words
Fibre Bragg grating/Calibration/Strain sensitivity factor引用本文复制引用
基金项目
国家自然科学基金(52307035)
聚变堆主机关键系统综合研究设施项目(2018-000052-73-01-001228)
出版年
2024
NETL
NSTL
万方数据