摘要
设计了一种弹性圆筒为衬底的光纤Bragg光栅(FBG)压力传感头,采用参考光栅补偿温度变化对FBG测量压力的影响。在温度为20～100℃、压力为0～20MPa的范围内测试了传感器的特性,并给出了修正温度变化后压力引起波长漂移的实验曲线。结果表明,传感器压力灵敏度为-0.0127nm/MPa,其绝对值约是裸FBG压力灵敏度的4倍,实现了压力增敏。传感头采用密封设计,避免了液体和气体的渗漏,通过选择不同的内径和壁厚,可调整传感头的量程和灵敏度。
A fiber Bragg grating(FBG) pressure sensor using a elastic cylinder as the substrate is designed.The properties of the proposed sensor are tested in the temperature range of 20-100℃ and the pressure range of 0-20 MPa.The curve of wave-length shift caused by pressure for the revised temperature is given.Results show that the pressure sensitivity of the proposed sensor is -0.012 7 nm/MPa,which is 4 times of that of the bare FBG.And sealing design has been adopted to avoid fluid or gas leakage.By selecting the...
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2009年第4期425-428,共4页
Journal of Optoelectronics·Laser
基金
国家"863"计划资助项目(2006AA06Z210
2007AA03Z413)
国家自然科学基金资助项目(60727004)
