scholarly journals Application of Distributed Optical Fiber Sensing Technology in the Anomaly Detection of Shaft Lining in Grouting

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Chunde Piao ◽  
Jun Yuan ◽  
Bin Shi ◽  
Haijun Lu ◽  
Guangqing Wei ◽  
...  
Keyword(s):  
Anomaly Detection ◽  
Optical Fiber ◽  
Optical Fiber Sensors ◽  
Fiber Sensors ◽  
Time Deformation ◽  
Fiber Sensing ◽  
Sensing Technology ◽  
Optical Fiber Sensing ◽  
Shaft Lining ◽  
Distributed Optical Fiber

The rupture of the shaft lining caused by grouting has seriously undermined the safety in coal mining. Based on BOTDR distributed optical fiber sensing technology, this paper studied the layout method of optical fiber sensors and the anomaly detection method of the deformation and obtained the evolution law of shaft deformation triggered by grouting. The research results showed that the bonding problem of optical fiber sensors in damp environment could be effectively solved, by applying the binder consisting of sodium silicate and cement. Through BOTDR-based deformation detection, the real-time deformation of the shaft lining caused by grouting was immediately spotted. By comparing the respective strain of shaft lining deformation and concrete deformation, the risk range of shaft lining grouting was identified. With the additional strain increment of the shaft lining triggered by each process of grouting, the saturated condition of grouting volume in strata was analyzed, providing an important technical insight into the field construction and the safety of the shaft lining.

scholarly journals Structural Health Monitoring of Civil Infrastructure Using Optical Fiber Sensing Technology: A Comprehensive Review

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
X. W. Ye ◽  
Y. H. Su ◽  
J. P. Han
Keyword(s):  
Structural Health Monitoring ◽  
Optical Fiber ◽  
Health Monitoring ◽  
Optical Fiber Sensors ◽  
Civil Infrastructure ◽  
Fiber Sensors ◽  
Structural Health ◽  
Fiber Sensing ◽  
Sensing Technology ◽  
Optical Fiber Sensing

In the last two decades, a significant number of innovative sensing systems based on optical fiber sensors have been exploited in the engineering community due to their inherent distinctive advantages such as small size, light weight, immunity to electromagnetic interference (EMI) and corrosion, and embedding capability. A lot of optical fiber sensor-based monitoring systems have been developed for continuous measurement and real-time assessment of diversified engineering structures such as bridges, buildings, tunnels, pipelines, wind turbines, railway infrastructure, and geotechnical structures. The purpose of this review article is devoted to presenting a summary of the basic principles of various optical fiber sensors, innovation in sensing and computational methodologies, development of novel optical fiber sensors, and the practical application status of the optical fiber sensing technology in structural health monitoring (SHM) of civil infrastructure.

scholarly journals Experimental Study on Deformation Monitoring of Bored Pile Based on BOTDR

2019 ◽  
Vol 9 (12) ◽  
pp. 2435 ◽  
Author(s):  
Lei Gao ◽  
Chuan Han ◽  
Zhongquan Xu ◽  
Yingjie Jin ◽  
Jianqiang Yan
Keyword(s):  
Optical Fiber ◽  
Noise Removal ◽  
Deformation Monitoring ◽  
Optical Time Domain Reflectometer ◽  
Fiber Sensing ◽  
Bored Pile ◽  
Sensing Technology ◽  
Optical Fiber Sensing ◽  
Unbiased Risk ◽  
Distributed Optical Fiber

In order to study the deformation of bored pile, it is necessary to monitor the strain of the pile. The distributed optical fiber sensing technology realizes the integration of sensing and transmission, which is incomparable with traditional point monitoring method. In this paper, the Brillouin optical time domain reflectometer (BOTDR) distributed optical fiber sensing technology is used to monitor the deformation of the bored pile. The raw data monitored by BOTDR is processed by the wavelet basis function, that can perform noise removal processing. Three different methods of noise removal are chosen. Through the processing, the db5 wavelet is used to decompose the deformation data of bored pile monitored by BOTDR into two layers. The decomposed high-frequency signal is denoised by the Stein-based unbiased risk threshold, rigrsure. The decomposed data is smoothed by the translational mean method, and the final data after denoising and smoothing processing is real and reliable. The results of this study will provide data support for the deformation characteristics of bored pile, and also show the advantages of distributed optical fiber sensing technology.

Optical-Fiber Sensors: An Overview

MRS Bulletin ◽  
2002 ◽  
Vol 27 (5) ◽  
pp. 365-369 ◽  
Author(s):  
D. J. Webb
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Material Characterization ◽  
Chemical Sensing ◽  
Optical Fiber Sensors ◽  
Bragg Grating ◽  
Fiber Sensors ◽  
Fiber Sensing ◽  
Recent Developments ◽  
Optical Fiber Sensing

AbstractThis article provides an overview of the field of optical-fiber sensing, including a brief introduction to the properties of optical fibers that make them suitable for material characterization and monitoring. Some of the recent developments in the field are described, with an emphasis on Bragg grating sensors, multiplexed systems, and chemical sensing, as well as the new field of microstructured fiber.

Pipeline corrosion and leakage monitoring based on the distributed optical fiber sensing technology

Measurement ◽  
2018 ◽  
Vol 122 ◽  
pp. 57-65 ◽  
Author(s):  
Liang Ren ◽  
Tao Jiang ◽  
Zi-guang Jia ◽  
Dong-sheng Li ◽  
Chao-lin Yuan ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Sensing ◽  
Sensing Technology ◽  
Optical Fiber Sensing ◽  
Leakage Monitoring ◽  
Distributed Optical Fiber ◽  
Pipeline Corrosion
Sign in / Sign up

Export Citation Format

Share Document