Optical fiber grating-based sensing system for use in pavement health monitoring

Wang, Jian-Neng; Tang, Jaw-Luen

doi:10.1117/12.776532

Cited by 5 publications

(4 citation statements)

References 22 publications

(35 reference statements)

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“…Experimental results of FBG sensor used have shown that measurement errors of 6 micro strains and 0.13 Celsius for strain and temperature could be achieved, respectively [12].…”

Section: Shm Technologies For Pavement and Bridge Structuresmentioning

confidence: 99%

“…By introducing innovative FOS in a real-time pavement and bridge monitoring system physical parameters, such as strain, temperature and water level condition, can be obtained for the required section in long term [12]. These data can aid structural evaluation, performance assessment and accurate analysis of pavement and bridge structures.…”

Section: Shm Technologies For Pavement and Bridge Structuresmentioning

confidence: 99%

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Review on structural health interrogation using fiber bragg grating sensors

Šķēls

Janeliukštis

Haritonovs

2018

Engineering for Rural Development

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Abstract. Fibre Bragg Grating sensors are optical fibre sensors that are now widely used in civil, mechanical and aerospace engineering for structural health monitoring and damage detection purposes. Typical parameters to be measured are strain and temperature, but also rotation, pressure, vibrations, the distance between stationary and moving or rotating components and concentration of chemical substances can be registered. These sensors have numerous advantages with respect to their piezoelectric counterparts, such as light weight, small dimensions, immunity to electromagnetic interference caused by nearby electronic devices. One of the most notable advantages of Fibre Bragg Grating sensors is the multiplexing capability, meaning that several tens to hundreds of sensors can be stacked together to increase the number of measurement points. This is a key advantage in structural health monitoring and damage detection in aerospace, pavement, bridge and other structures, where numerous points on the structure are subjected to high stresses. Moreover, fibre optical sensors are fully passivethey are capable of functioning without power supply. This review paper deals with highlighting the usage of Fibre Bragg Grating sensors in structural health monitoring and damage detection in various types of structures, namely, civil structures (bridges, pavements) and lightweight structures (aircraft, thin-walled composites), thus underlining a great significance of these sensors in structural safety.Keywords: optical fibre, FBG sensors, damage detection, SHM. Optical sensors overviewOptical fibres consist of two concentric silica layers, namely, the core and the cladding. The small differences in refractive index between both layers ensure the condition of total internal reflection of light inside the fibres, making the optical fibres efficient waveguides. Fibre optical sensors (FOS) comprise the core with a diameter of about 8 µm made of silica doped with germanium oxide and a cladding layer with a diameter of 125 µm made of pure silica. The smallest signal attenuation 0.2 dB/km is achieved at the wavelength of 1.550 nm [1].The essential difference between conventional and fibre optical sensors (FOS) is that FOS are passive -they are capable of fully functioning without power supply. Providing electrical power to the sensor in remote areas for road pavements, bridges or aircraft can be a very difficult task. FOS are sensitive to temperature, pressure, strain, gas concentration, vibrations, the distance between stationary and moving or rotating components, etc. and the raw FOS measurements are in a form of wavelength information, which is analysed and processedto reveal the vital information about the health state of the structure [2]. Optical sensors also provide higher accuracy compared to electronic analogues. This is due to the fact that the light wavelength is much shorter (1.3-1.5 µm) than the radio waves used in wireless systems (in GHz, wavelength measured in centimetres).The most promising type of fibre optic sensors ...

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“…Experimental results of FBG sensor used have shown that measurement errors of 6 micro strains and 0.13 Celsius for strain and temperature could be achieved, respectively [12].…”

Section: Shm Technologies For Pavement and Bridge Structuresmentioning

confidence: 99%

Section: Shm Technologies For Pavement and Bridge Structuresmentioning

confidence: 99%

Review on structural health interrogation using fiber bragg grating sensors

Šķēls

Janeliukštis

Haritonovs

2018

Engineering for Rural Development

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“…[18][19][20][21] These technologies have shown unique advantages over conventional monitoring methods, including tiny size, high sensitivity, immunity to EMI, good durability, and the ability of multiplexing. The early-stage study on the feasibility of fiber optic sensing in pavement monitoring was introduced by Tang et al 22 Wang et al 23 and Wang and Tang 24 developed a high-resolution temperature and strain sensor using fiber Bragg grating (FBG) technology and a simple and low-cost long-period grating (LPG) sensor for measuring the water level in pavement structures. In the research of Dore et al, 25 the Fabry-Perot (F-P)-based fiber optic strain sensors were applied to monitor small strains of existing pavements.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of pavement behavior after embankment widening using a fiber optic sensor network

Weng

Zhu

Chen

et al. 2014

Structural Health Monitoring

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In order to investigate the actual health condition of asphalt concrete pavements on widened road embankments, a full-scale model test study was conducted. A fiber Bragg grating–based sensor network was developed to monitor the strain distributions within the pavement structure, which was subjected to differential settlements. An improved packaging and installation method of the quasi-distributed sensor system was utilized, which not only ensured a high sensor survival rate but also achieved accurate measurement of axial strains in longitudinal and transverse directions. Based on the monitoring results, the strain characteristics of the pavement structure under different settlements were analyzed in detail. It is found that in general, the top layer of the asphalt pavement structure was subject to tension stress due to the differential settlement of the embankment. Plastic deformation of the pavement was observed when the differential settlement increased to 22 cm. The base layer of the pavement had the most significant response in comparison with the top and middle layers. The geogrid reinforcement in the embankment had a positive effect to alleviate the tension stress in the pavement. This experimental study also indicates the capability of fiber optic sensor networks to monitor the performance of pavements with a high degree of accuracy.

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“…The primary motivation of this study is to develop and evaluate a light weight and low-cost liquid-level sensor using reflective long-period fiber grating (LPFG), which has the potential for use in civil and agronomy engineering work such as ground water level monitoring for pavement structures or water level control for the increase in crop yield using deep-ponding in paddy fields [1,2]. Further, it could be used on other applications such as liquid-level monitoring of tanks or reservoirs for industrial sectors, debris flow monitoring and warnings for the tropical cyclone season, as well as water level monitoring for hydraulic applications such as pipes, channels, and dams.…”

Section: Introductionmentioning

confidence: 99%

Liquid-Level Sensor Using Reflective Long-Period Fiber Grating

Wang

Tang

Jan

et al. 2011

AMM

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This paper presents the development and assessment of a liquid-level sensor using reflective long-period fiber grating (LPFG) technology. The LPFG was fabricated by the electrical arc discharge method and the liquid-level sensor consisted of five LPFGs in series with a reflective mirror (end) coated with silver by Tollen’s test. The experimental findings showed the sensor could be used to automatically monitor five liquid levels, such as 20, 40, 60, 80, and 100 cm. The sensing system had at least 100-cm liquid-level measurement capacity. The reflective LPFGs-in-series sensor was able to successfully yield a comparable liquid-level sensing performance and hopefully could be used in the fields of civil and agronomy engineering applications such as pipes, channels, dams, and deep-ponding paddy fields.

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Optical fiber grating-based sensing system for use in pavement health monitoring

Cited by 5 publications

References 22 publications

Review on structural health interrogation using fiber bragg grating sensors

Review on structural health interrogation using fiber bragg grating sensors

Experimental investigation of pavement behavior after embankment widening using a fiber optic sensor network

Liquid-Level Sensor Using Reflective Long-Period Fiber Grating

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