Development of high temperature acoustic emission sensing system using fiber Bragg grating
- 307 Downloads
In some applications in structural health monitoring (SHM), the acoustic emission (AE) detection technology is used in the high temperature environment. In this paper, a high-temperature-resistant AE sensing system is developed based on the fiber Bragg grating (FBG) sensor. A novel high temperature FBG AE sensor is designed with a high signal-to-noise ratio (SNR) compared with the traditional FBG AE sensor. The output responses of the designed sensors with different sensing fiber lengths also are investigated both theoretically and experimentally. Excellent AE detection results are obtained using the proposed FBG AE sensing system over a temperature range from 25 ℃ to 200 ℃. The experimental results indicate that this FBG AE sensing system can well meet the application requirement in AE detecting areas at high temperature.
KeywordsOptical sensor high temperature fiber Bragg grating acoustic emission
This research is supported by the National Natural Science Foundation of China (Grant Nos. 61403233, 61503218, 61573226, and 61473176), the Excellent Young and Middle-Aged Scientist Award Grant of Shandong Province of China (No. BS2013DX018), and the Natural Science Foundation of Shandong Province for Outstanding Young Talents (No. ZR2015JL021).
- A. Mohimi, T. H. Gan, and W. Balachandran, “Development of high temperature ultrasonic guided wave transducer for continuous in service monitoring of steam lines using non-stoichiometric lithium niobate piezoelectric ceramic,” Sensors and Actuators A: Physical, 2014, 216(1): 432–442.CrossRefGoogle Scholar
- G. H. Sun, M. Q. Bo, C. J. Zhang, and J. Z. Pan, “Propagation characteristics of acoustic signal in the circle waveguide rod of two conditions,” Journal of East China University of Science and Technology (Natural Science Edition), 2010, 36(6): 851–858.Google Scholar
- N. Dixon, R. Hill, and J. Kavanagh, “Acoustic emission monitoring of slope instability: development of an active waveguide system,” Proceedings of ICE: Geotechnical Engineering, 2003, 156(2): 83–95.Google Scholar
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.