A novel FBG sensing head geometry for strain-temperature discrimination

Wenjun Zhou; Chun-Liu Zhao; Jie Huang; Weimin Shen; Xinyong Dong

doi:10.1117/12.851312

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25 November 2009 A novel FBG sensing head geometry for strain-temperature discrimination

Wenjun Zhou, Chun-Liu Zhao, Jie Huang, Weimin Shen, Xinyong Dong

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Proceedings Volume 7634, Optical Sensors and Biophotonics; 763411 (2009) https://doi.org/10.1117/12.851312
Event: Asia Communications and Photonics, 2009, Shanghai, Shanghai , China

Abstract

A novel FBG sensing head geometry with half corroded by hydrofluoric acid and half kept intact for strain-temperature discrimination has been proposed. Utilizing different diameters of two halves of the gratings, different strain sensitivities are achieved (≈50% difference) while temperature sensitivities remain the same. The maximum experimental errors obtained were within ±5.49 με and ±1.6 °C, respectively. The design has not only realized the simultaneous measurement of temperature and strain, but also obtained the temperature insensitive measurement.

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Wenjun Zhou, Chun-Liu Zhao, Jie Huang, Weimin Shen, and Xinyong Dong "A novel FBG sensing head geometry for strain-temperature discrimination", Proc. SPIE 7634, Optical Sensors and Biophotonics, 763411 (25 November 2009); https://doi.org/10.1117/12.851312

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