基于3×3耦合器的光纤光栅温度传感器解调系统
|
摘要
针对光纤光栅的温度应变交叉敏感问题,提出了一种管式光纤光栅温度传感器,使用外径8mm、内径6mm、长9cm的不锈钢管作为材料,制作了只对温度敏感的光纤光栅传感器,实验表明,传感器呈现良好的温度线性,温度灵敏系数为9.72pm/℃,稳定性好。在此基础上,采用了基于3×3耦合器的干涉型光纤光栅温度解调方案,详细的推导了信号解调过程,经过实验验证了解调方法的可行性及稳定性,实验结果表明,温度测量系统在40℃～100℃的测量范围内温度测量误差小于0.1℃,达到了工程应用的要求。
In view of the cross-sensitivity of temperature and strain of fiber Bragg grating(FBG),a tubular fiber Bragg grating temperature sensor is proposed. In this paper,the stainless-steel pipes with 8 mm outer diameter,6 mm inner diameter and 9 cm length are used as materials to fabricate temperature-sensitive fiber grating sensors. The experimental results show that the sensor has a good temperature linearity and temperature sensitivity coefficient of 9.72 pm/℃ and has a good stability. On this basis,an interferometric fiber grating temperature demodulation scheme which based on 3×3 coupler is adopted;and the demodulation process is deduced in detail. The feasibility and stability of the method are verified through experiments. The experimental results show that the temperature measurement error of the system is less than 0.1℃ in the range of 40℃ to 100℃,which meets the requirement of Engineering application.
In view of the cross-sensitivity of temperature and strain of fiber Bragg grating(FBG),a tubular fiber Bragg grating temperature sensor is proposed. In this paper,the stainless-steel pipes with 8 mm outer diameter,6 mm inner diameter and 9 cm length are used as materials to fabricate temperature-sensitive fiber grating sensors. The experimental results show that the sensor has a good temperature linearity and temperature sensitivity coefficient of 9.72 pm/℃ and has a good stability. On this basis,an interferometric fiber grating temperature demodulation scheme which based on 3×3 coupler is adopted;and the demodulation process is deduced in detail. The feasibility and stability of the method are verified through experiments. The experimental results show that the temperature measurement error of the system is less than 0.1℃ in the range of 40℃ to 100℃,which meets the requirement of Engineering application.
引文
[1]周建华.光纤光栅传感器应变传递特性研究[D].武汉:武汉理工大学,2010.
[2]张靖辉,谭文秀.光纤温度传感器在温度测量系统中的应用[J].电子技术与软件工程,2015(23):252-252.
[3]张翔,谭跃刚,陈宜炀,等.管式封装FBG大量程温度传感器及其特性研究[J].现代机械,2016(6):9-11.
[4]张叶浩,衣文索,崔光磊,等.干涉型光纤预警系统入侵信号的调制解调技术[J].吉林大学学报:信息科学版,2018,36(1):1-8.
[5]余有龙,李德明,张林.金属管封装光纤光栅温度传感器特性的实验研究[J].黑龙江大学自然科学学报,2011,28(5):737-740.
[6]张虹.光纤光栅传感系统干涉法信号解调技术研究[J].仪表技术与传感器,2008(11):20-23.
[7]李东,张晓晖,黄俊斌.用基于3×3耦合器的干涉仪解调相移光纤光栅传感信号[J].传感技术学报,2004,17(3):460-462.
[8]马卫东,施伟,付浩军,等.光纤光栅传感器的工作原理及研究进展[J].光通信研究,2001(4):58-62.
[9]崔光磊,衣文索,牛卫丛,等.基于分布式光纤传感器的管涌监测系统[J].长春理工大学学报:自然科学版,2018,41(1):39-43.
[10]陈宇,林京,孟强.基于3×3耦合器光纤水听器的数字化解调方案[J].仪器仪表学报,2008,29(4):755-759.
[11]张叶浩,衣文索,崔光磊,等.基于LMS算法的光纤振动预警系统降噪技术研究[J].长春理工大学学报:自然科学版,2018,41(1):34-38.
[12]张雅彬,窦峥,曹家年.干涉型光纤水听器三路输出解调方案研究[J].哈尔滨工程大学学报,2004,25(6):732-735.
[2]张靖辉,谭文秀.光纤温度传感器在温度测量系统中的应用[J].电子技术与软件工程,2015(23):252-252.
[3]张翔,谭跃刚,陈宜炀,等.管式封装FBG大量程温度传感器及其特性研究[J].现代机械,2016(6):9-11.
[4]张叶浩,衣文索,崔光磊,等.干涉型光纤预警系统入侵信号的调制解调技术[J].吉林大学学报:信息科学版,2018,36(1):1-8.
[5]余有龙,李德明,张林.金属管封装光纤光栅温度传感器特性的实验研究[J].黑龙江大学自然科学学报,2011,28(5):737-740.
[6]张虹.光纤光栅传感系统干涉法信号解调技术研究[J].仪表技术与传感器,2008(11):20-23.
[7]李东,张晓晖,黄俊斌.用基于3×3耦合器的干涉仪解调相移光纤光栅传感信号[J].传感技术学报,2004,17(3):460-462.
[8]马卫东,施伟,付浩军,等.光纤光栅传感器的工作原理及研究进展[J].光通信研究,2001(4):58-62.
[9]崔光磊,衣文索,牛卫丛,等.基于分布式光纤传感器的管涌监测系统[J].长春理工大学学报:自然科学版,2018,41(1):39-43.
[10]陈宇,林京,孟强.基于3×3耦合器光纤水听器的数字化解调方案[J].仪器仪表学报,2008,29(4):755-759.
[11]张叶浩,衣文索,崔光磊,等.基于LMS算法的光纤振动预警系统降噪技术研究[J].长春理工大学学报:自然科学版,2018,41(1):34-38.
[12]张雅彬,窦峥,曹家年.干涉型光纤水听器三路输出解调方案研究[J].哈尔滨工程大学学报,2004,25(6):732-735.