Today, modern monitoring systems allow reliable condition monitoring of tunnels using fiber Bragg technology. Mechanical
The tunnel chosen for installation of the sensors was a concourse tunnel, which is one of the largest sprayed concrete
This seriously threatens the safety of tunnel construction and operation and the protection of the regional ecological
Fiber Bragg grating (FBG) sensors have emerged as advanced tools for monitoring a wide range of physical
Abstract Structural health monitoring is essential for the lifecycle maintenance of tunnel infrastructure. Distributed fiber
This paper reports about a tunnel monitoring approach based on distributed fibre optic sensing (DFOS), which allows strain and
Firstly, this manuscript systematically sorts out the development and evolution process of the theory and technology
We report on application tests of novel sensor elements for long term surveillance of tunnels. The sensors are made
Recent advances in various FOS based monitoring systems, including Brillouin time domain distributed optical sensors
FBG, or Fiber Bragg Grating, is another fiber optic sensing technology. Unlike DTS, which measures temperature
Such ongoing tunnel deterioration necessitates long-term field monitoring and assessment of the continuous
This paper presents a novel super absorbent polymer (SAP)-coated ultra-weak fiber Bragg grating (UWFBG) strain
A fiber optic Linear Heat Detection system essentially consists of the interrogator unit and the sensor element, i.e. the fiber optic
The fiber optic grating temperature detection device is installed on the top of the vehicle tunnel and laid longitudinally along the
This article reviews the current state-of-the-art of fiber optic sensing/monitoring technologies, including the basic
Compared with traditional sensing technology, optical fiber sensing technology provides flexible installation options.
Abstract Distributed fiber optic sensors (DFOSs) possess the capability to measure strain and temperature variations
This review delves into the significant advancements in optical fiber sensor (OFS) technologies such as Fiber Bragg
Abstract and Figures This research explores the deployment of Fiber Bragg Grating (FBG) fiber-optic sensors for
According to the highway tunnel existing potential fire problem, this paper puts forward a fiber Bragg grating sensor that
This study proposed a sensor module that can monitor the temperature of the power cable joint using a fiber optic
These four issues are comprehensively discussed, and practical suggestions are provided for the implementation of DFOS in tunnel
High-resolution temperature sensing with Raman optical frequency domain reflectometry (OFDR) using optical
The stress and strain equilibrium state is changed during the excavation and construction of the tunnel. Thus, the introduction of
High-temperature measurements above 1000 °C are critical in harsh environments such as aerospace, metallurgy,
The purpose of this paper is to summarise the practical applications and benefits of optical fibre based sensors over
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