摘要
分析了堤坝渗流通过温度监测的可行性,提出了基于分布式光纤温度传感的堤坝渗流监测方法,设计了模拟装置;模拟监测系统由堤坝实体模型、渗流控制单元和光纤监测单元组成,采用传统的温湿度计和渗流量计对堤坝模型渗流实施单点监测,并与DiTeSt分析仪的结果比较。堤坝渗流模拟装置可实现不同水温、不同浸润线、不同规格堤坝和堤坝渗流程度的重复模拟,给出了一种野外专用的传感光缆实验结果。研究中的试验结果有利于设计合理的光缆布设和探测方案,同时为堤坝安全监测的量化研究提供有效的手段和平台。
Based on the temperature change in an embankment, a seepage flow simulator and monitoring system based on distributed optical fiber sensing are proposed. A simulator is designed that consists of scale model of embankment with definite length, seepage flow control cell and monitoring cell. Conventional hygrothermograph and flowmeter are emploved in system dispersedly. The results from those conventional instruments will be used to compare with the data from a distributed fibre sensing DiTeSt analyzer. The simulator equipment can monitor various embankments with different boundary conditi process of producing seepage pathway and ons, such as temperature, distributions of soakage line and scales. The configuration of sensing cable are presented, as well as test results with a field-installed fiber optic sensing cable. The simulator and results are helpful to build reasonable configurations for field real-time monitoring of abnormal seepage flow, which also offer an effective approach to study problems related to a secured embankment.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2007年第3期431-436,共6页
Chinese Journal of Scientific Instrument
基金
Supported by National "948" Project(200608)
关键词
堤坝
渗流
模拟装置
分布式光纤传感
温度监测
embankment
seepage
simulator rig
distributed optical fiber sensing
temperature monitoring
作者简介
Zhu Pingyu, female, born in 1971, Hubei province, associate professor, senior member of China Instrument and Control Society. She received her PhD in machine design and theory from Central South University in 2003. She ever worked in Tianjin University as apost-PhD. Now she is working as a visiting scholar in department of Physics, University of Ottawa, Canada. Her research interests include measuring theory and techniques for mechanical engineering. She currently mainly focuses on application research of optical fiber sensor, including FBG and distributed fiber optic sensing based on SBS. She has been working in this field for many years and has published nearly 30 papers in journals and international conferences at home and abroad. E-mail： pyzhu@ 163. com, zhu. pingyu@ gmail.comLuc Thévenaz, male, born in 1958, Geneva, Switzerland. Diploma in physics, mention astrophysics, 1982. PhD in nature science, mention physics,1988. PhD dissertation entitled study and measure of chromatic dispersion in optical waveguides.
