Strain monitoring and fatigue life of Bragg grating fiber optic sensors

1999 ◽  
Author(s):  
Nezih Mrad ◽  
Sherri Sparling ◽  
Jeremy Laliberte
Keyword(s):  
Fatigue Life ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Bragg Grating ◽  
Strain Monitoring

Fiber Optic Sensing the Behavior of Prestressed-Prism-Reinforced Composite Concrete Beams for Bridge Deck Application

1997 ◽  
Vol 503 ◽  
Author(s):  
Edward G. Nawy ◽  
P. E.
Keyword(s):  
High Performance ◽  
Fiber Optic ◽  
High Performance Concrete ◽  
Fiber Optic Sensors ◽  
Bragg Grating ◽  
Smart Systems ◽  
Service Load ◽  
Deformational Behavior ◽  
On Line ◽  
Concrete Elements

ABSTRACTThis investigation involves the identification and use of a novel type of fiber optic sensors in monitoring the deformation behavior of critical sections of the structural concrete elements and transforming them into smart systems. Basic operating principles of the Bragg-grating sensors identified in this work are proved to be feasible. Deformational behavior was studied of high performance concrete composite beams reinforced with prestressed prisms and instrumented with Bragg Grating fiber optic sensors. The experimental techniques using those sensors for evaluating their behavior at service load stages, and the potential of this technique for on-line, real-time monitoring of existing constructed concrete structures are presented.

Detection of tilted fiber Bragg grating fiber-optic sensors with short-term KLT: towards low-cost biosensors

2018 ◽  
Author(s):  
Madina Shaimerdenova ◽  
Aliya Bekmurzayeva ◽  
Marzhan Sypabekova ◽  
Yntymak Abukhanov ◽  
Daniele Tosi
Keyword(s):  
Fiber Bragg Grating ◽  
Fiber Optic ◽  
Low Cost ◽  
Fiber Optic Sensors ◽  
Bragg Grating ◽  
Short Term

scholarly journals Fiber Bragg grating fabrication by femtosecond laser radiation

2019 ◽  
Vol 220 ◽  
pp. 03007
Author(s):  
Anton Chernikov ◽  
Dmitriy Kochuev ◽  
Kirill Khorkov ◽  
Ruslan Chkalov ◽  
Nikolay Davydov
Keyword(s):  
Laser Radiation ◽  
Femtosecond Laser ◽  
Fiber Bragg Grating ◽  
Fiber Optic ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Fiber Optic Sensors ◽  
Bragg Grating ◽  
Femtosecond Laser Radiation ◽  
Grating Fabrication

The paper presents the results of fiber Bragg gratings fabrication by femtosecond laser radiation using point-by-point and line-by-line inscription methods. The approach makes it possible to fabricate the second and higher diffraction orders fiber Bragg gratings, which can be used as sensitive elements of fiber-optic sensors.

Strain monitoring of flexible membrane structure by using fiber-optic sensors

2004 ◽  
Vol 2004.6 (0) ◽  
pp. 253-254
Author(s):  
Kazuro Kgeyama ◽  
Hideaki Murayama ◽  
Kiyoshi Uzawa ◽  
Isamu Ohsawa ◽  
Makoto Kanai ◽  
...  
Keyword(s):  
Membrane Structure ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Flexible Membrane ◽  
Strain Monitoring

Testing and Monitoring for a Large Scale Truss Bridge Using Long-Gauge Fiber Optic Sensors

2013 ◽  
Vol 569-570 ◽  
pp. 223-229 ◽  
Author(s):  
Chun Feng Wan ◽  
Wan Hong ◽  
Zhi Shen Wu ◽  
Tadanobu Sato
Keyword(s):  
Damage Detection ◽  
Structural Damage ◽  
Large Scale ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Structural Testing ◽  
Bragg Grating ◽  
Truss Bridges ◽  
Long Span ◽  
Truss Bridge

Fiber optic sensors become very popular for structural testing and monitoring in civil engineering nowadays, due to its advantage of high resolution and environment durability. In this paper, long-gauge fiber optic bragg grating sensors will be introduced. Structural damage detection stratagem using the micro-strain mode will be studied. Then its application to a structural testing and monitoring for a real long span truss bridge will be discussed in detail. In the testing, 23 long-gauge fiber optic bragg grating sensors were deployed on the mid span of the bridge. Testing were made under conditions either there is train on the bridge or no train on it. Corresponding dynamic characteristics were analyzed and discussed. Results of the testing show that long-gauge fiber optic sensors can work well for structural testing and also damage detection for truss bridges.

scholarly journals Monitoring Strategic Hydraulic Infrastructures by Brillouin Distributed Fiber Optic Sensors

Water ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 188
Author(s):  
Manuel Bertulessi ◽  
Daniele Fabrizio Bignami ◽  
Ilaria Boschini ◽  
Marco Brunero ◽  
Maddalena Ferrario ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Strain Gauges ◽  
Mountain Valley ◽  
Concrete Members ◽  
Strain Monitoring ◽  
Hydropower Plants ◽  
Complex Structural ◽  
Monitoring Technologies

We present a case study of a Structural Health Monitoring (SHM) hybrid system based on Brillouin Distributed Fiber Optic Sensors (D-FOS), Vibrating Wire (VW) extensometers and temperature probes for an existing historical water penstock bridge positioned in a mountain valley in Valle d’Aosta Region, Northwestern Italy. We assessed Brillouin D-FOS performances for this kind of infrastructure, characterized by a complex structural layout and located in a harsh environment. A comparison with the more traditional strain monitoring technology offered by VW strain gauges was performed. The D-FOS strain cable has been bonded to the concrete members using a polyurethane-base adhesive, ensuring a rigid strain transfer. The raw data from all sensors are interpolated on a unique general timestamp with hourly resolution. Strain data from D-FOS and VW strain gauges are then corrected from temperature effects and compared. Considering the inherent differences between the two monitoring technologies, results show a good overall matching between strain time series collected by D-FOS and VW sensors. Brillouin D-FOS proves to be a good solution in terms of performance and economic investment for SHM systems on complex infrastructures such as hydropower plants, which involve extensive geometry combined with the need for detailed and continuous strain monitoring.

Spatially continuous strain monitoring using distributed fiber optic sensors embedded in carbon fiber composites

2019 ◽  
Vol 58 (07) ◽  
pp. 1 ◽  
Author(s):  
Sasi Jothibasu ◽  
Yang Du ◽  
Sudharshan Anandan ◽  
Gurjot S. Dhaliwal ◽  
Rex E. Gerald ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Fiber Optic ◽  
Fiber Composites ◽  
Fiber Optic Sensors ◽  
Carbon Fiber Composites ◽  
Strain Monitoring
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