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Monitoring corrosion of reinforcement in concrete structures via fiber Bragg grating sensors

Zhupeng ZHENG, Xiaoning SUN, Ying LEI

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 316-319 doi: 10.1007/s11465-009-0040-y

Abstract: In this paper, using fiber Bragg grating (FBG), a corrosion sensor for monitoring steel rebars embedded

Keywords： fiber Bragg grating (FBG)     corrosion     concrete structures     accelerated corrosion test    

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Numerical investigation and optimal design of fiber Bragg grating based wind pressure sensor

Xiangjie WANG, Danhui DAN, Rong XIAO, Xingfei YAN

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3,   Pages 286-292 doi: 10.1007/s11709-017-0415-9

Abstract: A wind pressure sensor based on fiber Bragg grating (FBG) for engineering structure was investigated

Keywords： wind pressure measurement     wind pressure sensor     fiber Bragg grating     optimal design    

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Digital monitoring and health diagnosis for mechanical equipment operation safety based on fiber Bragg grating

Zude ZHOU, Desheng JIANG, Quan LIU

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 1,   Pages 5-14 doi: 10.1007/s11465-009-0011-3

Abstract: This paper introduces fiber Bragg grating (FBG) based on a fiber optic grating sensor developed to be

Keywords： fiber Bragg grating sensor (FBGS)     mechanical equipment operation safety     embedded technology     high-speed    

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Crack detection for wading-concrete structures using water irrigation and electric heating

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 368-377 doi: 10.1007/s11709-022-0926-x

Abstract: Cracking in wading-concrete structures has a worse impact on structural safety compared with conventional concrete structures. The accurate and timely monitoring of crack development plays a significant role in the safety of wading-concrete engineering. The heat-transfer rate near a crack is related to the flow velocity of the fluid in the crack. Based on this, a novel crack-identification method for underwater concrete structures is presented. This method uses water irrigation to generate seepage at the interface of a crack; then, the heat-dissipation rate in the crack area will increase because of the convective heat-transfer effect near the crack. Crack information can be identified by monitoring the cooling law and leakage flow near cracks. The proposed mobile crack-monitoring system consists of a heating system, temperature-measurement system, and irrigation system. A series of tests was conducted on a reinforced-concrete beam using this system. The crack-discrimination index ψ was defined, according to the subsection characteristics of the heat-source cooling curve. The effects of the crack width, leakage flow, and relative positions of the heat source and crack on ψ were studied. The results showed that the distribution characteristics of ψ along the monitoring line could accurately locate the crack, but not quantify the crack width. However, the leakage flow is sensitive to the crack width and can be used to identify it.

Keywords： structural health monitoring     underwater concrete structure     fiber Bragg grating     crack detection     temperature    

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Displacement measuring grating interferometer: a review Special Feature on Precision Measurement and Inst

Peng-cheng HU, Di CHANG, Jiu-bin TAN, Rui-tao YANG, Hong-xing YANG, Hai-jin FU

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 5,   Pages 631-654 doi: 10.1631/FITEE.1800708

Abstract:

A grating interferometer, called the “optical encoder,” is a commonly used tool for precise displacementIn contrast to a laser interferometer, a grating interferometer is insensitive to the air refractiveClassified based on the measuring principle and optical configuration, a grating interferometer experiencesCompared with the former two, the spatially separated heterodyne grating interferometer could achieveThe development of incremental displacement measuring grating interferometers achieved in recent years

Keywords： Grating interferometer     Optical encoder     Displacement measurement     Precision measurement    

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A digital moiré fringe method for displacement sensors Article

Jian WU,Ting-ting ZHOU,Bo YUAN,Li-qiang WANG

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 9,   Pages 946-953 doi: 10.1631/FITEE.1500270

Abstract: The method is formed by only one grating with a constant pitch.First, the magnified grating image is received by an imaging array and is sent to a computer.Then, the digital moiré fringes are generated by overlaying the grating image with its mirrored one.This method has the effects of amplifying displacement and averaging the grating lines error, the same

Keywords： Digital moiré     fringe     Displacement measurement     Grating    

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A general method of designing phase-shifting algorithms for grating lateral shearing interferometry None

Chao FANG, Yang XIANG, Ke-qi QI

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 6,   Pages 809-814 doi: 10.1631/FITEE.1601692

Abstract: We propose a general method of designing phase-shifting algorithms for grating lateral shearing interferometryWe derive a general expression of the phase-shifting algorithm in grating lateral shearing interferometer

Keywords： Interferometry     Phase measurement     Phase-shifting algorithms    

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Corrugated steel pipe culvert applying in highway and strain measuring with fiber grating test technology

Cheng Gang,Fang Ping

Strategic Study of CAE 2013, Volume 15, Issue 8,   Pages 108-112

Abstract: strain conditions of corrugated steel pipe culvert under different soil fill heights, the fiber Bragg grating

Keywords： corrugated steel pipe culvert     highway     soft foundation     field test     fiber test    

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Fused-like angles: replacement for roll-pitch-yaw angles for a six-degree-of-freedom grating interferometer Research Article

Di Chang, Pengcheng Hu, Jiubin Tan,di.chang@hit.edu.cn,hupc@hit.edu.cn,jbtan@hit.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 12,   Pages 1551-1684 doi: 10.1631/FITEE.2000432

Abstract: The errors increase as the tip and tilt angles of the grating increase.The are error-free, so they are more in line with the definitions in grating interferometry and more

Keywords： 无偏溯源角；光栅干涉仪；六自由度测量；角度表达方法    

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1.3-μm 4×25-Gb/s hybrid integrated TOSA and ROSA Special Feature on Optoelectronic Devices and Inte

Yu LIU, Hao-tian BAO, Yi-ming ZHANG, Zhi-ke ZHANG, Yun-shan ZHANG, Xiang-fei CHEN, Jun LU, Yue-chun SHI

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 4,   Pages 490-497 doi: 10.1631/FITEE.1800371

Abstract: The design of TOSA and ROSA is employed using a silica-based arrayed waveguide grating chip to select

Keywords： Reconstruction equivalent chirp     Arrayed waveguide grating     Transmitter optical subassembly     Hybrid integrated    

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Title Author Date Type Operation

Monitoring corrosion of reinforcement in concrete structures via fiber Bragg grating sensors

Zhupeng ZHENG, Xiaoning SUN, Ying LEI

Journal Article

Numerical investigation and optimal design of fiber Bragg grating based wind pressure sensor

Xiangjie WANG, Danhui DAN, Rong XIAO, Xingfei YAN

Journal Article

Digital monitoring and health diagnosis for mechanical equipment operation safety based on fiber Bragg grating

Zude ZHOU, Desheng JIANG, Quan LIU

Journal Article

Crack detection for wading-concrete structures using water irrigation and electric heating

Journal Article

Displacement measuring grating interferometer: a review

Peng-cheng HU, Di CHANG, Jiu-bin TAN, Rui-tao YANG, Hong-xing YANG, Hai-jin FU

Journal Article

A digital moiré fringe method for displacement sensors

Jian WU,Ting-ting ZHOU,Bo YUAN,Li-qiang WANG

Journal Article

A general method of designing phase-shifting algorithms for grating lateral shearing interferometry

Chao FANG, Yang XIANG, Ke-qi QI

Journal Article

Corrugated steel pipe culvert applying in highway and strain measuring with fiber grating test technology

Cheng Gang,Fang Ping

Journal Article

Fused-like angles: replacement for roll-pitch-yaw angles for a six-degree-of-freedom grating interferometer

Di Chang, Pengcheng Hu, Jiubin Tan,di.chang@hit.edu.cn,hupc@hit.edu.cn,jbtan@hit.edu.cn

Journal Article

1.3-μm 4×25-Gb/s hybrid integrated TOSA and ROSA

Yu LIU, Hao-tian BAO, Yi-ming ZHANG, Zhi-ke ZHANG, Yun-shan ZHANG, Xiang-fei CHEN, Jun LU, Yue-chun SHI

Journal Article