PPP-BOTDA分布式光纤传感技术在水工结构物健康监测中的可行性探讨  

Feasibility study of hydraulic structures health monitoring on PPP-BOTDA distributed optical fiber sensing technology

作　　者：杨孟[1,2] 苏怀智[1,2] 郭芝韵 伏晓[3] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,南京210098 [2]河海大学水利水电学院,南京210098 [3]河海大学大禹学院,南京210098

出　　处：《中国科技论文》2014年第5期499-501,506,共4页China Sciencepaper

基　　金：高等学校博士学科点专项科研基金资助项目(20130094110010);水利部公益性行业科研专项经费项目(201301061);新世纪优秀人才支持计划(NCET-10-0359);江苏省普通高校研究生科研创新计划项目(CXLX13_246)

摘　　要：基于脉冲预泵浦(pulse-prepump,PPP)布里渊光时域分析的PPP-BOTDA分布式光纤传感技术,作为新近发展起来的一种监测手段,在空间分辨率和精度方面具有明显优势。针对水工结构物健康监测的领域特点,通过多组试验,分析了PPPBOTDA分布式光纤传感技术的平均化次数、重复性、扫频范围、扫频步长、监测时间、长短距离空间定位精度、空间分辨率和采样间隔等各项性能指标,在此基础上,进行了基于该技术的水工结构物温度和应变监测试验,验证了该技术在水工结构物健康监测中的感知性能和可行性。Pulse-prepump brillouin optical time domain analysis （PPP-BOTDA）distributed optical fiber sensing technology is based on pulse-prepump.It has obvious advantages in spatial resolution and precision as a recently developed monitoring method. PPP-BOTDA technology was analyzed by many groups of tests for the characteristics of health monitoring of hydraulic struc-tures.The studied performance indexes include averaging count,repeatability,frequency range,frequency step,monitoring time,long and short distance spatial location precision,spatial resolution,sampling interval,and so on.Temperature and strain monitoring tests were studied on this basis.The technology is verified for the self-sensing properties and feasibility.

关 键 词：水工结构 健康监测 光纤传感技术 

分 类 号：TV698.1[水利工程—水利水电工程]