Investigation on simultaneous measurement of strain and temperature based on hybrid FBG/EFPI sensor

Wentao Zhang; Jingyun Dai; Baochen Sun; Liping Yang; Yanliang Du

doi:10.1117/12.779859

1 November 2007 Investigation on simultaneous measurement of strain and temperature based on hybrid FBG/EFPI sensor

Wentao Zhang, Jingyun Dai, Baochen Sun, Liping Yang, Yanliang Du

Proceedings Volume 6423, International Conference on Smart Materials and Nanotechnology in Engineering; 64233T (2007) https://doi.org/10.1117/12.779859
Event: International Conference on Smart Materials and Nanotechnology in Engineering, 2007, Harbin, China

Abstract

In this paper a novel fiber Bragg grating and extrinsic fiber Fabry-Perot interferometer (FBG/EFPI) sensor which can measure the strain and temperature simultaneously in the smart materials is designed and analyzed. The FBG and EFPI are encapsulated into a special stainless steel structure. The structure makes the FBG strain-sensitive. On the other hand, the EFPI is insensitive to the strain but sensitive to the temperature. The strain sensitivity and the temperature sensitivity are derived in details. Experiments show that the sensor has good performance and high accuracy (0.1°C for temperature and 1.3pm/με for strain). In conclusion, the FBG/EFPI sensor is applicable for simultaneous measurement of strain and temperature in smart materials and structure health monitoring.

Citation Download Citation

Wentao Zhang, Jingyun Dai, Baochen Sun, Liping Yang, and Yanliang Du "Investigation on simultaneous measurement of strain and temperature based on hybrid FBG/EFPI sensor", Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64233T (1 November 2007); https://doi.org/10.1117/12.779859

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KEYWORDS

Sensors

Fiber Bragg gratings

Temperature metrology

Fabry–Perot interferometers

Fiber optics sensors

Capillaries

Smart materials

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