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基于模场自积增强检测的光纤声光旋转传感器

刘昱 任国斌 靳文星 吴越 杨宇光 简水生

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基于模场自积增强检测的光纤声光旋转传感器

刘昱, 任国斌, 靳文星, 吴越, 杨宇光, 简水生

Enhanced selfintegration algorithm for fiber torsion sensor based acoustically-induced fiber grating

Liu Yu, Ren Guo-Bin, Jin Wen-Xing, Wu Yue, Yang Yu-Guang, Jian Shui-Sheng
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  • 介绍了一种应变不敏感的基于模场自积增强检测的光纤声光旋转传感器.通过调节加载到光纤声致光栅上的微波频率能使双模光纤输出高纯度LP11模式.采用自积增强算法显著提高传感分辨比例,改善探测速度,实现对环境旋转角度变化的动态监测.传感器在0180的测量范围内,角度最大测量误差范围小于11%;在轴向应变为1001500 之间对应变不敏感.
    Mechanical parameter monitoring based on optical mode detection benefits from its low cross sensitivity and inexpensive instrument. The key to improving detection accuracy is to generate high-quality detection light and use efficient algorithms. We present a strain-independent torsion sensor based on acoustically-induced fiber grating (AIFG) in the dual-mode fiber (DMF) and use the enhanced self-integration algorithm to improve the sensing accuracy. By tuning the radio frequency of driving signal, the LP11 mode generated by the AIFG can be exploited to measure the dynamic torsion variations. Without the complex device such as fiber interferometers and photonic crystal fibers (PCFs), the simple structure built by mode converter and charge coupled device (CCD) can track the dynamic variations and has less cross sensitivity of strain along the transmission direction. The AIFG driven by a radio frequency as a mode converter at specific wavelength does not participate in sensing but generates the high-purity LP11 mode that accounts for more than 90% of total power. With the twist from the rotator stage, the DMF keeps rotating and CCD records the spatial distribution of mode profiles. The features of optical mode is enhanced based on matrix analysis and then the relationship between twist angle and mode features is obtained. Based on image processing, the dynamic variation of spatial beam detected by CCD can be easily tracked and quantified. In experiment, the rotation angle can be obtained by calculating the feature value of the optical mode. Our image detection algorithm is specially designed for the optical fiber mode. Compared with traditional image recognition based on feature learning, it is simple and fast because it is needless to use image segmentation and stochastic processing. Through a series of experiments on angle rotation and parallel strain, we verify the correctness of the enhanced self-integration model and analyse the computational uncertainties that influence the stability of experiment. In the 0 to 180 measurement range, the maximum range of measurement error is less than 11%. When the axial strain is between 100 and 1500 , the sensor is strain-independent. Thus, it is verified that the torsion sensor based on AIFG has high sensitivity and can overcome the cross sensitivity of strain along a certain direction. The pertinent results have significant guidance in designing the multi-parameter sensor. The optical mode detection, instead of the traditional spectrum measurement, enables the whole structure to have the potential to be rebuilt by inexpensive devices that work in visible wavelengths.
      通信作者: 刘昱, 13111016@bjtu.edu.cn
    • 基金项目: 国家自然科学基金(批准号:61178008,61275092)和国家杰出青年科学基金(批准号:61525501)资助的课题.
      Corresponding author: Liu Yu, 13111016@bjtu.edu.cn
    • Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 61178008, 61275092) and the National Science Fund for Distinguished Young Scholars of China (Grant No. 61525501).
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  • [1]

    Venanzi I, Cluni F, Gusella V, Materazzi A L 2007 Proceedings of the 12th International Conference on Wind Engineering AWES. Cairns, Australia, July 2007

    [2]

    Materazzi A L, Ubertini F 2011 J. Sound Vibrat. 330 6420

    [3]

    Spanos P D, Chevallier A M, Politis N P, Payne M L 2003 Shock Vib. 35 85

    [4]

    Rajnauth J, Jagai T 2012 Int. J. Appl. Sci. Technol. 2 109

    [5]

    Zhu T, Rao Y J, Mo Q J 2006 Acta Phys. Sin. 55 249(in Chinese) [朱涛, 饶云江, 莫秋菊 2006 物理学报 55 249]

    [6]

    Huang B, Shu X 2016 Opt. Express 24 17670

    [7]

    Song B, Miao Y, Lin W, Zhang H, Wu J, Liu B 2013 Opt. Express 21 26806

    [8]

    Chen L, Zhang W G, Wang L, Zhang H, Sieg J, Zhou Q, Zhang L Y, Wang B, Yan T Y 2014 Opt. Express 22 31654

    [9]

    Chen W, Lou S, Wang L, Zou H, Lu W, Jian S 2011 IEEE Photon. Technol. Lett. 23 1639

    [10]

    Silva R M, Ferreira M S, Frazao O 2012 Opt. Commun. 285 1167

    [11]

    Lou S Q, Lu W L, Wang X 2013 Acta Phys. Sin. 62 786(in Chinese) [娄淑琴, 鹿文亮, 王鑫 2013 物理学报 62 786]

    [12]

    Budinski V, Donlagic D 2016 Opt. Express 24 26282

    [13]

    Zhou Q, Zhang W, Chen L, Yan T, Zhang L, Wang L, Wang B 2015 Opt. Express 23 23877

    [14]

    Qu H, Yan G F, Skorobogatiy M 2014 Opt. Lett. 39 4835

    [15]

    Suzuki S, Matsui T, Asao T, Kotani K 2012 J. Biomed. Sci. 5 672

    [16]

    Li Q P, Ding F, Fang P 2006 Electron. Lett. 42 910

    [17]

    Yu D, Mo Q, Hong Z, Fu S, Sima C, Tang M, Liu D 2016 Opt. Lett. 41 4617

    [18]

    Zou Y R, Du D, Wang L 2011 Informatics in Control, Automation and Robotics (Berlin: Spring) p714

    [19]

    Gao X, Liu Y, You D 2014 Opt. Laser Technol. 62 141

    [20]

    Sun Q, Feng H, Zeng Z M 2015 Opt. Precision Eng. 23 334(in Chinese) [孙茜, 封皓, 曾周末 2015 光学精密工程 23 334]

    [21]

    Zhang W, Wei K, Huang L, Mao D, Jiang B, Gao F, Zhao J 2016 Opt. Express 24 19278

    [22]

    Diez A, Delgado-Pinar M, Mora J, Cruz J L, Andrs M V 2003 IEEE Photon. Technol. Lett. 15 84

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出版历程
  • 收稿日期:  2017-07-03
  • 修回日期:  2017-09-29
  • 刊出日期:  2018-01-05

基于模场自积增强检测的光纤声光旋转传感器

  • 1. 北京交通大学, 全光网络与现代通信网教育部重点实验室, 北京 100044;
  • 2. 北京交通大学光波技术研究所, 北京 100044
  • 通信作者: 刘昱, 13111016@bjtu.edu.cn
    基金项目: 国家自然科学基金(批准号:61178008,61275092)和国家杰出青年科学基金(批准号:61525501)资助的课题.

摘要: 介绍了一种应变不敏感的基于模场自积增强检测的光纤声光旋转传感器.通过调节加载到光纤声致光栅上的微波频率能使双模光纤输出高纯度LP11模式.采用自积增强算法显著提高传感分辨比例,改善探测速度,实现对环境旋转角度变化的动态监测.传感器在0180的测量范围内,角度最大测量误差范围小于11%;在轴向应变为1001500 之间对应变不敏感.

English Abstract

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