布喇格光栅磁场传感器交叉敏感的研究

Research of the cross sensitive of magnetic field sensors based on FBG

从光纤光栅传感的基本原理出发,分析了光纤光栅内外参量对于磁场测量的影响,对温度、应力、压力和光纤光栅内应力分别进行了讨论。仿真结果表明,基于PDL的磁场传感方案对于温度和应力不敏感,内应力和时变压力则会影响其性能,压力的影响尤为显著;测量精度要求高,内应力必须予以考虑。

From the basic principle of fiber grating sensor, analyzed the influence of the external and internal parameters for the magnetic-field measurement,discussed the influence of pressure,temperature,stress and the internal stress of fiber grating for measuring magnetic field.The simulation results show that the magnetic field sensing solutions based on PDL is not sensitive to temperature and axial stress,pressure and internal stress can affect the performance,especially the pressure;For measuring precision demand is higher occasions, innernal stress is that must be considered.