Composite Coatings for Fibre Bragg Grating Sensor in High Temperature Environments
International Journal of Sensors and Sensor Networks
Volume 3, Issue 2, October 2015, Pages: 12-17
Received: Sep. 3, 2015;
Accepted: Sep. 19, 2015;
Published: Oct. 10, 2015
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Ying Huang, Department of Civil and Environmental Engineering, North Dakota State University, Fargo, United States
Fardad Azarmi, Department of Mechanical Engineering, North Dakota State University, Fargo, U.S.A
Mehdi Salimi Jazi, Department of Mechanical Engineering, North Dakota State University, Fargo, U.S.A
Fiber Bragg grating (FBG) sensor has been widely applied for structural health monitoring of various applications due to its unique advantages of compact size, remote interrogation, electromagnetic hardening, high sensitivity, passive operation, real-time, and distributed sensing. However, the regular FBG sensors have a limitation of working below temperature of 300°C and without special care or expensive special sensor design, its use in high temperature environments is limited. In this paper, cost-effective composite coatings are developed to enable the use of FBG sensors in high temperature environments. The developed composite coatings combine various metal and nonmetal layers to achieve the best temperature elimination effects with less heat residual stress. The design of the composite coating is guided through theoretical and numerical modeling analysis of heat transfer and thermal stress progressing. Experimental studies have proved that the developed composite coating can work effective to insulate heat effect for sensors up to 650°C without inducing significant deformation on the top of sensor surface from heat. The developed composite coating packaged FBG sensors, thus, may be able to apply for high temperature environments on a spacecraft in harsh service environments and buildings in fire environments.
Mehdi Salimi Jazi,
Composite Coatings for Fibre Bragg Grating Sensor in High Temperature Environments, International Journal of Sensors and Sensor Networks.
Vol. 3, No. 2,
2015, pp. 12-17.
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