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A non-contact FBG vibration sensor with double differential temperature compensation

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Abstract

This paper has presented a non-contact fiber Bragg grating (FBG) vibration sensor with double differential temperature compensation. Two FBGs and two states of the sensor have been employed to achieve double differential temperature compensation. Based on magnetic coupling and FBG sensing principle, it can be used to realize non-contact measurement of vibration of the rotating shaft. Experimental results show that the working band ranges are within 0–150 Hz; the sensitivity is −0.67 pm/µm, and the linearity is 3.87 % within a range of 2–2.6 mm. The fitting equation of temperature compensation which is caused by structural inflation can be expressed as: Δλ 1′ − Δλ 2′ = 1.51 × T − 32.97. When used to amend a temperature error, the sensor’s temperature error will be reduced to 1.19 % in the range of 25–60 °C.

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Acknowledgments

This project is supported by the National Natural Science Foundation of China (Project No. 51375358).

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Authors and Affiliations

  1. Wuhan University of Technology, Wuhan, 430070, Hubei, China

    Tianliang Li, Yuegang Tan, Zude Zhou & Kai Zheng

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  1. Tianliang Li
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  2. Yuegang Tan
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  3. Zude Zhou
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  4. Kai Zheng
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Correspondence to Tianliang Li.

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Li, T., Tan, Y., Zhou, Z. et al. A non-contact FBG vibration sensor with double differential temperature compensation. Opt Rev 23, 26–32 (2016). https://doi.org/10.1007/s10043-015-0153-y

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  • DOI: https://doi.org/10.1007/s10043-015-0153-y

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