Journal ArticleDOI
Pipeline Leak Detection Using Raman Distributed Fiber Sensor With Dynamic Threshold Identification Method
Yang Xu,Li Jian,Mingjiang Zhang,Yu Tao,Baoqiang Yan,Zhou Xinxin,Yu Fuhao,Jianzhong Zhang,Lijun Qiao,Tao Wang,Gao Shaohua +10 more
TLDR
The experimental results show that the proposed RDFS can detect and accurately locate the leak position by using the DTIM, and the positioning accuracy is 1 m.Abstract:
We propose and experimental demonstrate a Dynamic Threshold Identification Method (DTIM) based on the Raman distributed fiber sensor (RDFS) system for detecting the pipeline leak. The DTIM can detect the position of pipeline leak according to distributed temperature measured by the RDFS. The DTIM includes three steps, which are the space segmentation detection, $3\sigma $ criterion and identification of historical data. The experimental results show that the proposed RDFS can detect and accurately locate the leak position by using the DTIM, and the positioning accuracy is 1 m. In addition, the temperature change rate of the leak position performs a quadratic function relationship with the leak rate, and the leak rate can be estimated by this method. It provides an effective distributed monitoring method for the leak monitoring of pipeline.read more
Citations
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Journal ArticleDOI
Physics and applications of Raman distributed optical fiber sensing
Jian Li,Mingjiang Zhang +1 more
TL;DR: In this article , the authors reviewed advances in performance enhancements and typical applications of Raman distributed optical fiber sensing, and integration of this optical system technology with knowledge based, that is, demodulation technology etc.
Journal ArticleDOI
Physics and applications of Raman distributed optical fiber sensing
Jian Li,Mingjiang Zhang +1 more
TL;DR: In this article , the authors reviewed advances in performance enhancements and typical applications of Raman distributed optical fiber sensing, and integration of this optical system technology with knowledge based, that is, demodulation technology etc.
Journal ArticleDOI
Fibre-optic sensor and deep learning-based structural health monitoring systems for civil structures: a review
U. M. N. Jayawickrema,H. M. C. M. Herath,N. K. Hettiarachchi,H. P. Sooriyaarachchi,Jayantha Ananda Epaarachchi +4 more
TL;DR: Structural health monitoring (SHM) systems in civil engineering structures have been a growing focus of research and practice as discussed by the authors , and the most recent publications in SHM related to bridges, buildings, and pipelines using emerging OFS and DL-based applications, and to provide readers with an overall knowledge and understanding of various SHM applications.
Journal ArticleDOI
Liquid Leakage Sensor With a V-Shaped Defect Coupling Structure Based on Polymer Optical Fibers
TL;DR: In this paper, a liquid leakage sensor with a V-shaped defect coupling structure (VDCS) is proposed and experimentally demonstrated using polymer optical fibers (POFs) based on a light-emitting diode (LED) side-coupled light source.
Journal ArticleDOI
Leak Localization Method for Pipeline Based on Fusion Signal
TL;DR: The experimental results show that the proposed leak localization method for the fusion of pressure and flow signals for pipeline based on fusion signal can be used to locate the leak of short distance pipeline.
References
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Journal ArticleDOI
Intensifying the response of distributed optical fibre sensors using 2D and 3D image restoration
TL;DR: An unprecedented boost in signal-to-noise ratio and measurement contrast is experimentally demonstrated and an approach for performance enhancement that exploits the high level of similitude and redundancy contained on the multidimensional information measured by distributed fibre sensors is proposed.
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Pipeline corrosion and leakage monitoring based on the distributed optical fiber sensing technology
TL;DR: In this paper, a new application of optical frequency domain reflectometry (OFDR) technique is introduced to monitor both corrosion and leakage, and simulation tests are conducted to verify this method, where several optical fiber sensors were bonded to the pipe surface with the same interval, forming a sensor array.
Journal ArticleDOI
An accelerometer-based leak detection system
TL;DR: A model for a real-time monitoring system capable of identifying the existence of single event leaks in pressurized water pipelines is proposed and showed promising results with 98.25% accuracy in distinguishing between leak states and non-leak states.
Journal ArticleDOI
Leak Detection, Size Estimation and Localization in Pipe Flows
TL;DR: A leak detection system consisting of an adaptive observer based on a set of two coupled one dimensional first order hyperbolic partial differential equations governing the flow dynamics is designed.
Journal ArticleDOI
Auto-correction method for differential attenuation in a fiber-optic distributed-temperature sensor.
Kwang Suh,Chung Lee +1 more
TL;DR: A novel method to improve the accuracy of fiber-optic distributed-temperature measurements derived from Raman backscatterings is presented, which utilizes two light sources with different wavelengths to cancel out the nonidentical attenuations generated by the wavelength differences between Stokes and anti-Stokes.