摘要
由于FBG传感器的存在改变了基体的应变分布,光纤与基体不是直接接触,导致测量应变产生一定的损失,FBG传感器测量应变与基体真实应变不相等。为了提高测量精度,建立了FBG传感器应变传递理论模型,并利用有限元证明其正确性;讨论了结构参数对应变测量的影响。结果表明:FEM解与理论解误差在5%以内,平均应变传递率随着基体弹性模量的增大而逐渐增大,随着粘结层厚度的增大而逐渐减小。
The existing of FBG sensor affects strain distribution of the host material,and the host material does not contact the optical fiber,resulting in a certain loss of measured strain,so the strain measured by FBG sensors is not equal to the true strain of the host material.To improve the measurement accuracy,the theoretical model of strain transfer of FBG sensor was established and its correctness was verified by finite element method.The effect of structural parameters on strain measurement was discussed.The results show that the error between the theoretical solution and FEM was controlled within 5%,the average strain transfer rate increases with the increase of elastic modulus of host material,and decreases with increase of the thickness of the adhesive layer.
作者
吴入军
张晓峰
陈田
郑百林
朱灵杰
WU Ru-jun;ZHANG Xiao-feng;CHEN Tian;ZHENG Bai-lin;ZHU Ling-jie(School of Mechanical,Shanghai DianJi University,Shanghai 201306,China;School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 200092,China;Zhuolang Jiangsu Textile Machinery Co.,Ltd.Shanghai Branch,Shanghai 200240,China)
出处
《仪表技术与传感器》
CSCD
北大核心
2021年第8期1-6,共6页
Instrument Technique and Sensor
基金
上海市高峰高原学科项目(A1-5701-18-007-03)
国家高技术研究发展计划(863计划)项目(2012AA040106)
上海多向模锻工程技术研究中心项目(20DZ2253200)。
