Health monitoring of engine blades by using an in-line fiber-optic F-P strain sensor based on hollow-core photonic crystal fiber

Yunjiang Rao; Yanen Fan; Hong Li; Tao Zhu

doi:10.1117/12.835269

5 October 2009 Health monitoring of engine blades by using an in-line fiber-optic F-P strain sensor based on hollow-core photonic crystal fiber

Yunjiang Rao, Yanen Fan, Hong Li, Tao Zhu

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Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75035R (2009) https://doi.org/10.1117/12.835269
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

We present the application of a fiber-optic F-P strain sensor based on hollow-core photonic crystal fiber (HCPCF) to measurement of stress of engine blades. The blade stress under different rotating speeds is tested by detecting the reflected wavelength shift of the HCPCF sensor. The experimental results show that the strain has a quadratic relationship with the rotating speed, which agrees well with the theoretical analysis. As such a HCPCF sensor with short cavity length can stand high temperature of up to 600°C and has low temperature sensitivity, it would be possible to realize real-time health monitoring of engine blades during operation.

Citation Download Citation

Yunjiang Rao, Yanen Fan, Hong Li, and Tao Zhu "Health monitoring of engine blades by using an in-line fiber-optic F-P strain sensor based on hollow-core photonic crystal fiber", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75035R (5 October 2009); https://doi.org/10.1117/12.835269

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KEYWORDS

Sensors

Fiber optics sensors

Photonic crystal fibers

Fiber optics

Fiber optics tests

Environmental sensing

Fiber optic communications

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