Acoustic emission detection with fiber optical sensors for dry cask storage health monitoring

2016 ◽  
Author(s):  
Bin Lin ◽  
Jingjing Bao ◽  
Lingyu Yu ◽  
Victor Giurgiutiu
Keyword(s):  
Acoustic Emission ◽  
Health Monitoring ◽  
Optical Sensors ◽  
Fiber Optical ◽  
Fiber Optical Sensors ◽  
Emission Detection

scholarly journals Temperature Effect on Fiber Optical Sensors for Dry Cast Storage Health Monitoring

2015 ◽  
Author(s):  
Bin Lin ◽  
Lingyu Yu ◽  
Victor Giurgiutiu
Keyword(s):  
Temperature Effect ◽  
Health Monitoring ◽  
Optical Sensors ◽  
High Frequency ◽  
Ultrasonic Waves ◽  
Laser Source ◽  
Reflective Spectrum ◽  
Fiber Optical ◽  
Fiber Optical Sensors ◽  
Fbg Sensors

The increasing number, size, and complexity of nuclear facilities deployed worldwide are increasing the need to maintain readiness and develop innovative sensing materials to monitor important to safety structures (ITS). Assessing and supporting next generation nuclear materials management and safeguards for future U.S. fuel cycles with minimum human intervention is of paramount importance. Technologies for the diagnosis and prognosis of a nuclear system, such as dry cast storage system (DCSS), can improve verification of the health of the structure that can eventually reduce the likelihood of inadvertently failure of a component. In the past decades, an extensive sensor technology development has been used for structural health monitoring (SHM). Fiber optical sensors have emerged as one of the major SHM technologies developed particularly for temperature and strain measurements. However, the fiber optical sensors and sensing system has not been developed with adequate solutions and guideline for DCSS applications. This paper presents an experimental study of temperature effect on fiber Bragg grating (FBG) sensors. The reflective spectrum of FBG sensors on the structure was measured with a tunable laser source. The shift of FBG reflective spectrum reflected the thermal expansion on the structure. The shift of the spectrum due to the temperature effect was correlated to the temperature changes. In addition, the FBG sensing methodology including high frequency guided ultrasonic waves (GUW) under different temperatures were also performed to check the performance of high frequency, small strain sensing. The potential of FBG sensors for DCSS applications was explored. The paper ends with conclusions and suggestions for further work.

Modelling Light Transmission in a Fiber-Optical Reflection System

2004 ◽  
Vol 9 (1) ◽  
pp. 55-63
Author(s):  
V. Kleiza
Keyword(s):  
Optical Sensors ◽  
Light Transmission ◽  
External Cavity ◽  
Linear Displacement ◽  
Fiber System ◽  
Light Emitting ◽  
Optical Media ◽  
Reflected Light ◽  
Fiber Optical ◽  
Fiber Optical Sensors

Light transmission in the reflection fiber system, located in external optical media, has been investigated for application as sensors. The system was simulated by different models, including external cavity parameters such as the distance between light emitting and receiving fibers and mirror positioning distance. The sensitivity to a linear displacement of the sensors was studied as a function of the distance between the tips of the light emitting fiber and the center of the pair reflected light collecting fibers, by positioning a mirror. Physical fundamentals and operating principles of the advanced fiber optical sensors were revealed.

Chaotic lasers for elimination of low-frequency fluctuations of backscattered Rayleigh radiation in distributed fiber optical sensors

2011 ◽  
Author(s):  
V. V. Spirin ◽  
C. A. López-Mercado ◽  
S. V. Miridonov ◽  
L. Cardoza-Avendaño ◽  
R. M. López-Gutiérrez ◽  
...  
Keyword(s):  
Optical Sensors ◽  
Low Frequency ◽  
Fiber Optical ◽  
Fiber Optical Sensors ◽  
Frequency Fluctuations

scholarly journals Mode-division-multiplexing of absorption-based fiber optical sensors

2016 ◽  
Vol 24 (5) ◽  
pp. 5186 ◽  
Author(s):  
Islam Ashry ◽  
Anbo Wang ◽  
Yong Xu
Keyword(s):  
Optical Sensors ◽  
Mode Division Multiplexing ◽  
Fiber Optical ◽  
Fiber Optical Sensors

scholarly journals Fiber-Optical Sensors: Basics and Applications in Multiphase Reactors

Sensors ◽  
2012 ◽  
Vol 12 (9) ◽  
pp. 12519-12544 ◽  
Author(s):  
Xiangyang Li ◽  
Chao Yang ◽  
Shifang Yang ◽  
Guozheng Li
Keyword(s):  
Optical Sensors ◽  
Multiphase Reactors ◽  
Fiber Optical ◽  
Fiber Optical Sensors

scholarly journals Fiber-optical Sensors Based on Mono-crystal Films of Garnet Ferrites for Mechatronic Systems

2015 ◽  
Vol 106 ◽  
pp. 202-209 ◽  
Author(s):  
Sergey A. Matyunin ◽  
Yuriy A. Fedotov ◽  
Orhan G. Babaev ◽  
Mikhail K. Wirchenko ◽  
Mikhail Yu.Gusev ◽  
...  
Keyword(s):  
Optical Sensors ◽  
Mechatronic Systems ◽  
Fiber Optical ◽  
Crystal Films ◽  
Fiber Optical Sensors
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