光电技术应用, 2014, 29 (6): 43, 网络出版: 2015-01-13  

基于BOTDA传感技术的空间分辨率研究

Research on Spatial Resolution Based on BOTDA Sensing Technology
作者单位
西安石油大学光电油气测井与检测教育部重点实验室,陕西省油气资源光纤探测工程技术研究中心,陕西 西安 710065
摘要
空间分辨率是BOTDA传感系统的一个重要参数,其主要取决于泵浦脉冲光的宽度。为了提高BOTDA系统的空间分辨率,在不改变泵浦脉冲光宽度的情况下,采用螺旋式盘绕传感光纤的方法,分析了布里渊散射传感原理,理论上分析采用螺旋式盘绕光纤对提高实际测量空间分辨率的影响。实验中泵浦脉冲光宽度为10 ns,BOTDA系统采样间隔为0.4 m。采用1 m长螺旋式盘绕传感光纤监测0.5 m管线轴向温度分布,监测空间分辨率为0.5 m。分析结果表明,采用螺旋式盘绕光纤更有利于提高监测管线温度场的空间分辨率。
Abstract
Spatial resolution is an important parameter of Brillouin optical time domain analysis (BOTDA) sensing system,which depends on the width of pump pulse light. To improve the spatial resolution of BOTDA system,spiral coiled optical fiber method is used without changing the width of pump pulse light. Brillouin scatter sensing principle is analyzed. The influence on improving spatial resolution in actual measurement process using coiled optical fiber is analyzed on theory. In the experiment,the width of pump pulse light is 10 ns,the sampling interval of BOTDA system is 0.4 m. The spiral coiled optical fiber with 1 m length is used to monitor the axial temperature distribution of 0.5 m pipeline and monitoring spatial resolution is 0.5 m. Analysis results show that spiral coiled optical fiber is more available to improve the spatial resolution in monitoring pipeline temperature field.
参考文献

[1] Naruse H,Tateda M,Ohno H,et al. Linear strain distribution dependence of the Brillouin gain spectrum. Optical Fiber Sensors Conference Technical Digest[C]//Portland,OR,USA,2002,1:309-312.

[2] 沈一春,宋牟平,章献民,等.单模光纤中受激布里渊散射阈值研究[J]. 中国激光,2005,32(4):497-500.

[3] Kurashima T,Horiguchi T,Lzumita H,et al. Brillouin optical fiber time domain reflecto-metry [J]. IEICE Transac tions on Communication,1993,E76-B(4):382-390.

[4] Horiguchi T,Tateda M. BOTDA-nondestructive measurement of single mode optical fiber attenuation characteristics using Brillouin interaction theory[J]. Journal of Light Wave Technology,1989,7(8):1170-1176.

[5] 聂俊,李端有,梁俊.基于BOTDA的温度和应变测试探讨[J]. 长江科学院院报,2011,28(4):68-70.

[6] 王菊,刘银,张伟娟.基于布里渊损耗的单端分布式光纤传感系统研究[J]. 激光与红外,2014,44(7):773-776.

[7] 崔何亮,张丹,施斌.布里渊分布式传感的空间分辨率及标定方法[J]. 浙江大学学报,2013,47(7):1233-1237.

[8] Anthony W B,Michael D D,Bao X,et al. Spatial resolution enhancement of a Brillouin distributed sensor using a novel singal proceeding method[J]. Journal of Lightwave Technology,1999,17(7):1179-1183.

[9] ZHANG Dan,XU Hong-zhong,SHI Bin,et al. Brillouin power spectrum analysis for partially uniformly strain optical fiber[J]. Optics and Laser in Engineering,2009,47(9):976-981.

[10] Brown A,Bao X Y. Analysis of the precision of a Brillouin scattering based distributed strain sensor[J]. Proc. of SPIE 1999,3670:359-365.

[11] Bao X Y,Brown A,Demerchant M,et al. Characterization of the Brillouin loss spectrum of single-mode fiber by use of very short(<10ns) pulses[J]. Optics Letters,1999,24(8):510-512.

贾振安, 徐成, 刘颖刚, 尉婷. 基于BOTDA传感技术的空间分辨率研究[J]. 光电技术应用, 2014, 29(6): 43. JIA Zhen-an, XU Cheng, LIU Ying-gang, WEI Ting. Research on Spatial Resolution Based on BOTDA Sensing Technology[J]. Electro-Optic Technology Application, 2014, 29(6): 43.

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