The purpose of this paper is to present the latest sensing structure designs and principles of information detection of fiber Bragg grating (FBG) displacement sensors. Research advance and the future work in this field have been described, with the background that displacement and deformation measurements are universal and crucial for structural health monitoring.
This paper analyzes and summarizes the existing FBG displacement sensing technologies from two aspects principle of information detection (wavelength detection, spectral bandwidth detection, light intensity detection, among others) and principle of the sensing elastomer structure design (cantilever beam type, spring type, elastic ring type and other composite structures).
The current research on developing FBG displacement sensors is mainly focused on the sensing method, the construction and design of the elastic structure and the design of new information detection method. The authors hypothesize that the following research trends will be strengthened in future: temperature compensation technology for FBG displacement sensors based on wavelength detection; a study of more diverse elastic structures; and fiber gratings manufactured with special fibers will greatly improve the performance of sensors.
The latest sensing structure designs and principles of information detection of FBG displacement sensors have been proposed, which could provide important reference for research group.
This work was supported in part by the National Natural Science Foundation of China under Grant 51605348, and in part by Natural Science Foundation of Hubei province under Grant 2016CFB116.
Liu, W., Guo, Y., Xiong, L. and Kuang, Y. (2019), "Fiber Bragg grating based displacement sensors: state of the art and trends", Sensor Review, Vol. 39 No. 1, pp. 87-98. https://doi.org/10.1108/SR-06-2017-0116Download as .RIS
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