Industrial Applications of the BOTDR Optical Fiber Strain Sensor

Ohno, Hiroshige; Naruse, Hiroshi; Kihara, Masaru; Shimada, Akira

doi:10.1006/ofte.2000.0344

Cited by 212 publications

(85 citation statements)

References 19 publications

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“…The measurement results suggested that the ground stress is controlled by tectonic stress. The orientation of the maximum horizontal stress is 116.3°( NWW-SEE), and the magnitude of vertical stress, the minimum horizontal stress, and the maximum horizontal stress are 14.5 MPa, 13.4 MPa, and 37.4 MPa, respectively, D i s t a n c e L ig h t fr e q u e n c y Light power P u ls e li g h t S t r a i n o r t e m p e r a t u r e r i s e I n t e n s it y I n t e n s it y T im e T im e P r o b e li g h t Frequency rise Figure 1: A schematic view of time and frequency domain acquisition for strain or temperature detection using BOTDR [28]. 4 Journal of Sensors σ v : σ h : σ H ratio approximately at 1.08 : 1 : 2.8.…”

Section: Field Application and Resultsmentioning

confidence: 99%

Application of Distributed Optical Fiber Sensing Technology in Surrounding Rock Deformation Control of TBM-Excavated Coal Mine Roadway

Tang

Cheng

2018

Journal of Sensors

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After roadway excavation, the deformation and failure of roadway surrounding rocks typically results in roadway damage or collapse. Conventional monitoring techniques, such as extensometers, stress meters, and convergence stations, are only capable to detect the stress or strain data with the shallow layers of surrounding rocks, and they require arduous manual works. Moreover, in the abovementioned monitoring techniques, the monitoring instruments are installed behind the excavation face; therefore, the strain and deformation occurring in front of excavation face cannot be detected. In order to eliminate these shortcomings, an innovative monitoring system for surrounding rock deformation control has been developed base on Brillouin optical time domain reflectometry. Compared with conventional monitoring systems, the proposed system provides a reliable, accurate, and real-time monitoring measure for roadway surrounding rock deformation control over wide extension. The optical fiber sensors are installed in boreholes which are situated ahead of the excavation face; therefore, the sensors can be protected well and the surrounding rock deformation behaviors can be studied. The proposed system has been applied within a TBM-excavated roadway in Zhangji coal mine, China. The surrounding rock deformation behaviors have been detected accurately, and the monitoring results provided essential references for surrounding rock deformation control works.

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Section: Field Application and Resultsmentioning

confidence: 99%

Application of Distributed Optical Fiber Sensing Technology in Surrounding Rock Deformation Control of TBM-Excavated Coal Mine Roadway

Tang

Cheng

2018

Journal of Sensors

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“…A technique similar to OTDR is employed, but in this case, strain and temperature are the measuring parameters obtained. Several setups have been developed by different research groups (Horiguchi et al1995, Horiguchi et al 1983, Niklès et al 1997, Parker et al 1997, Ohno et al 2001. A typical configuration of BOTDR setup is showed in Fig.…”

Section: Brillouin Optical Time Domain Reflectometer (Botdr)mentioning

confidence: 99%

“…Brillouin Optical Correlation Domain Analysis (BOCDA) (Hotate et al 2002, Imai et al 2010) is an example of these new technical developments. Nowadays, DOFSs based on Brillouin backscattering are used in laboratory tests or in SHM systems applied in civil structures as bridges, buildings, pipelines and railways (Ohno et al 2001). In all of these applications, if the damage detection is one of the aims of the SHM process, complex algorithms (Ravet et al 2009) and/or sophisticated devices (Shen et al 2010) are used to obtain millimetric spatial resolution with DOFSs based on Brillouin backscattering.…”

Section: Brillouin Optical Time Domain Analysis (Botda)mentioning

confidence: 99%

SHM by DOFS in civil engineering: a review

Rodríguez¹,

Casas²,

Villalba³

2015

Structural Monitoring and Maintenance

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Abstract. This paper provides an overview of the use of different Distributed Optical Fiber Sensor systems (DOFSs) to perform Structural Health Monitoring (SHM) in the specific case of civil engineering structures. Nowadays, there are several methods available for extracting distributed measurements from optical fiber, and their use have to be according with the aims of the SHM performance. The continuous-in-space data is the common advantage of the different DOFSs over other conventional health monitoring systems and, depending on the particular characteristics of each DOFS, a global and/or local health structural evaluation is possible with different accuracy. Firstly, the fundamentals of different DOFSs and their principal advantages and disadvantages are presented. Then, laboratory and field tests using different DOFSs systems to measure strain in structural elements and civil structures are presented and discussed. Finally, based on the current applications, conclusions and future trends of DOFSs in SHM in civil structures are proposed.

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“…Signal processing is key for real-time structure monitoring, and they have presented the modular signal processing system effectively. The other sensors which can be used are BOTDR strain sensors, as they have better efficiency due to good resolutions in signals [88]. They can be used for defect identification by measuring strains and also for detecting changes in water levels outside the ship.…”

Section: ) Real Time Monitoring Of Shipsmentioning

confidence: 99%

“…The issues and solutions adopted for monitoring of ships can be used in as is conditions [88][89] even for monitoring submarines except that the FOS systems should have thorough water protection schemes.…”

Section: ) Real Time Monitoring Of Submarines and Deep Sea Floormentioning

confidence: 99%

Review on Developments in Fiber Optical Sensors and Applications

Annamdas¹

2012

IJME

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The last couple of decades had witnessed a steep rise in extensive research of optoelectronic and fiber optical communication fields, which resulted in applications focused initially in military, aerospace equipments, and later in health monitoring for medicine, heritage culture and various engineering fields. Health monitoring has attracted the effort of many engineers throughout the world and is fast emerging as a pioneering field. It is helping to improve world economy in two ways; first, directly by providing longevity to all the important structures and secondly, by prevention of untimely failure leading to loss of life and money. This field is very vast, consisting of traditional monitoring methods as well as smart system based methods. The fiber optics belong to finest class of smart materials, there are many types and classifications of fiber optics based on necessity, manufacturer and the end user. This paper, gives a complete over view of fiber sensing systems and their usefulness. In addition, it highlights some of the general fiber optics available in the market with selected examples.

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Industrial Applications of the BOTDR Optical Fiber Strain Sensor

Cited by 212 publications

References 19 publications

Application of Distributed Optical Fiber Sensing Technology in Surrounding Rock Deformation Control of TBM-Excavated Coal Mine Roadway

Application of Distributed Optical Fiber Sensing Technology in Surrounding Rock Deformation Control of TBM-Excavated Coal Mine Roadway

SHM by DOFS in civil engineering: a review

Review on Developments in Fiber Optical Sensors and Applications

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