Monitoring on internal temperature of composite insulator with embedding fiber Bragg grating for early diagnosis

Wen Chen; Ming Tang

doi:10.1117/12.2264374

23 April 2017 Monitoring on internal temperature of composite insulator with embedding fiber Bragg grating for early diagnosis

Wen Chen, Ming Tang

Author Affiliations +

Proceedings Volume 10323, 25th International Conference on Optical Fiber Sensors; 103236X (2017) https://doi.org/10.1117/12.2264374
Event: 25th International Conference on Optical Fiber Sensors, 2017, Jeju, Korea, Republic of

Abstract

The abnormal temperature rise is the precursor of the defective composite insulator in power transmission line. However no consolidated techniques or methodologies can on line monitor its internal temperature now. Thus a new method using embedding fiber Bragg grating (FBG) in fiber reinforced polymer (FRP) rod is adopted to monitor its internal temperature. To correctly demodulate the internal temperature of FRP rod from the Bragg wavelength shift of FBG, the conversion coefficient between them is deduced theoretically based on comprehensive investigation on the thermal stresses of the metal-composite joint, as well as its material and structural properties. Theoretical model shows that the conversion coefficients of FBG embedded in different positions will be different because of non-uniform thermal stress distribution, which is verified by an experiment. This work lays the theoretical foundation of monitoring the internal temperature of composite insulator with embedding FBG, which is of great importance to its health structural monitoring, especially early diagnosis.

Citation Download Citation

Wen Chen and Ming Tang "Monitoring on internal temperature of composite insulator with embedding fiber Bragg grating for early diagnosis", Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103236X (23 April 2017); https://doi.org/10.1117/12.2264374

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