Abstract
A kind of sensible fiber grating acoustic emission (AE) signal sensor based on acrylic substrate is designed. The influence of encapsulation material and structure on the sensing characteristics was investigated experimentally. Firstly, the theory of FBG mode and the principle of fiber-optic Bragg grating (FBG) sensing are studied theoretically, and two kinds of encapsulation structures are proposed. FBG AE sensor converts the detected AE signal into the wavelength change of optical signal and converts it into electrical signal voltage change through photoelectric detector. The Advantech PCI-1712 card was used to voltage data acquisition. The software of FBG AE system is designed with LabVIEW to realize multichannel high-speed signal acquisition, data storage, data analysis, and data display and playback.
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Acknowledgment
This work is supported by Science and Technology Platform Project of Department of Education of Liaoning Province under Grant No. LGD2016008.
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Yu, Y., Wang, G., Liu, B. (2019). Research on Fiber Bragg Grating Acoustic Emission Sensor. In: Shen, G., Zhang, J., Wu, Z. (eds) Advances in Acoustic Emission Technology. WCAE 2017. Springer Proceedings in Physics, vol 218. Springer, Cham. https://doi.org/10.1007/978-3-030-12111-2_4
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DOI: https://doi.org/10.1007/978-3-030-12111-2_4
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