| 基于最小二乘法的电力电缆FBG传感测温系统 |
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| 引用本文： | 杨广学,莫磊.基于最小二乘法的电力电缆FBG传感测温系统[J].光电技术应用,2009,24(6):39-42. |
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| 作者姓名： | 杨广学 莫磊 |
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| 作者单位： | 哈尔滨理工大学电气与电子工程学院,黑龙江,哈尔滨,150040 |
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| 摘 要： | 为了提高电力电缆测温系统的测量精度和速度,提出了以光纤梳状滤波器代替参考光栅提供拟合数据参考点,采用最小二乘法拟合光纤Bragg光栅波长和F-P可调谐滤波器调谐电压的线性关系,通过F-P可调谐滤波器解调FBG传感器中心波长变化的方法,完成对电力电缆温度的测量.研究表明,光纤梳状滤波器能够代替多个恒温参考光栅实现波长标定,对反射波长的测量误差＜5pm,温度均方误差≤0.7 ℃.
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| 关 键 词： | 光纤Bragg光栅 最小二乘法 光纤梳状滤波器 电力电缆 F-P可调谐滤波器 |
| 收稿时间： | 2009/10/9 |
Fiber Bragg Grating Temperature Sensing System of Power Cables Based on Least Square Method |
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| YANG Guang-xue,MO Lei.Fiber Bragg Grating Temperature Sensing System of Power Cables Based on Least Square Method[J].Electro-Optic Technology Application,2009,24(6):39-42. |
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| Authors: | YANG Guang-xue MO Lei |
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| Affiliation: | YANG Guang-xue,MO Lei(Electrical & Electronic Engineering College,Harbin University of Science and Technology,Harbin 150040,China) |
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| Abstract: | To improve the accuracy and speed of the on-line temperature measurement system for power cables,a method for fitting data reference points was proposed,which uses fiber interleaver filter to replace reference-grating.Least square method is utilized to fit linear dependency between bragg wavelength of fiber grating and tuning voltage of Fabry-Perot filter.With wavelength shift that is demodulated by the tunable Fabry-Perot filter,the system realizes temperature measurement of power cables.The result of the ... |
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| Keywords: | fiber bragg gating(FBG) least square method fiber interleaver filter power cable tunable fiber Fabry-Perot filter |
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