Fiber optic transverse pressure detection technology for structural health monitoring

Yi Zhang; Zhi Zhuang; Chong Li

doi:10.1117/12.2319912

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13 November 2018 Fiber optic transverse pressure detection technology for structural health monitoring

Yi Zhang, Zhi Zhuang, Chong Li

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Proceedings Volume 10766, Infrared Sensors, Devices, and Applications VIII; 107660Q (2018) https://doi.org/10.1117/12.2319912
Event: SPIE Optical Engineering + Applications, 2018, San Diego, California, United States

Abstract

An embedded fiber optic sensor based on the photonic crystal fiber is proposed to measure the transverse stress in composited material for structural health monitoring. The sensing principle has been analyzed and validated by experiments. The 0.1%F.S high precision calibration device has been designed to indicated that linear correlation between the wavelength shift of Sagnac loop and pressure, and the good performances of sensor, such as the sensitivity coefficient is 0.1285nm/N, linearity is accessible to 1.02%F.S, maximum error is 3%F.S. Other experiments have been done by a material testing machine on the sensor, which have shown that the sensitivity coefficient is increasing with sensing length but immune with the shape of sensor. The sensor will be suitable for solving the problem of high precision online pressure monitoring in some complex structure health monitoring.

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Yi Zhang, Zhi Zhuang, and Chong Li "Fiber optic transverse pressure detection technology for structural health monitoring", Proc. SPIE 10766, Infrared Sensors, Devices, and Applications VIII, 107660Q (13 November 2018); https://doi.org/10.1117/12.2319912

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