ZHANG Cui. Temperature measurement precision of fiber Bragg grating improved by quadratic polynomial fitting arithmetic[J]. 2005, (7): 25-26+31. DOI: 10.13873/j.1000-97872005.07.009.
多项式拟合提高光纤光栅测温精度
摘要
阐述了光纤Bragg光栅的温度特性
分析了光栅封装前后温度特性变化的原因。将多项式拟合算法应用到光栅传感器与解调器构成的测量系统中
得到了二次多项式拟合算法可以有效地将原来的测量精度±0.8℃提高到±0.5℃的结论。最后
给出了实验数据。
Abstract
Temperature characteristic of fiber Bragg grating(FBG) is introduced
and the change reason of temperature characteristic of FBG after and before encapsulation is analyzed.Quadratic ploynomial arithmetic is applied to the system constituted by FBG sensor and demodulator.The result is found that two least squares can effectively enhance the precision of the system from ±0.8℃ to ±0.5℃