Impact localization on composites based on dynamic calibration of fiber Bragg grating sensors

Hong-yang Li; Shao-hua Wang; Jiang-bo Yuan; Chun-ling Xu; Zhen-hua Li; Feng Chen

doi:10.1117/12.2615550

19 November 2021 Impact localization on composites based on dynamic calibration of fiber Bragg grating sensors

Hong-yang Li, Shao-hua Wang, Jiang-bo Yuan, Chun-ling Xu, Zhen-hua Li, Feng Chen

Proceedings Volume 12059, Tenth International Symposium on Precision Mechanical Measurements; 120591W (2021) https://doi.org/10.1117/12.2615550
Event: Tenth International Symposium on Precision Mechanical Measurements, 2021, Qingdao, China

Abstract

Composites are gradually replacing traditional metal materials in aeronautical manufacturing. Despite of excellent properties, composite materials suffer from barely visible impact damage which can be caused by low velocity objects. In this paper, an impact localization algorithm is proposed based on dynamic characteristic calibration and reference database to improve the accuracy and robustness. The installation parameters of fiber Bragg grating (FBG) sensor are determined by the dynamic characteristic calibration. The impact positions are obtained by calculating the similarity degree between the random impact signal and the signals in the reference database. The algorithm is tested over a carbon fiber reinforced polymer (CFRP) plate attached with FBG sensors. Impacts are stimulated by using a hammer. Noise signals are added to part of the FBG sensor signals during experiments. The results show the proposed algorithm can accurately locate the impacts and deal with the signal interference.

Citation Download Citation

Hong-yang Li, Shao-hua Wang, Jiang-bo Yuan, Chun-ling Xu, Zhen-hua Li, and Feng Chen "Impact localization on composites based on dynamic calibration of fiber Bragg grating sensors", Proc. SPIE 12059, Tenth International Symposium on Precision Mechanical Measurements, 120591W (19 November 2021); https://doi.org/10.1117/12.2615550

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KEYWORDS

Fiber Bragg gratings

Sensors

Calibration

Composites

Adhesives

Databases

Optical fibers

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