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Volume 22
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10.3390/s22103930
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Article

Structural Design and Application of Desensitized FBG Force-Measuring Bolt

by
Minfu Liang
1,2,3,
Yang Song
1,2,*,
Xinqiu Fang
1,2,*,
Yuye Jiang
4,
Fan Zhang
1,2,
Shuang Li
3,
Ningning Chen
1,2 and
Ziyue Xu
1,2
1
School of Mines, China University of Mining and Technology, Xuzhou 221116, China
2
Research Center of Intelligent Mining, China University of Mining and Technology, Xuzhou 221116, China
3
School of Economics and Management, China University of Mining and Technology, Xuzhou 221116, China
4
Xuzhou Heavy Machinery Co., Ltd., Xuzhou 221116, China
*
Authors to whom correspondence should be addressed.
Sensors 2022, 22(10), 3930; https://doi.org/10.3390/s22103930
Submission received: 26 April 2022 / Revised: 17 May 2022 / Accepted: 19 May 2022 / Published: 23 May 2022
(This article belongs to the Special Issue Recent Advances in Fiber Bragg Grating Sensing)
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Abstract

Bolt-supporting technology has been widely used in mine roadway support, and its own working conditions have important reference value for roadway safety support. In order to realize the continuous and reliable monitoring of the bolt rod’s working condition, this paper analyzes the existing problems of the existing fiber Bragg grating force-measuring bolt (FBG-FMB), and proposes a fiber grating strain desensitization sensing theory. Based on this theory, a desensitized FBG-FMB is developed with the spring as the elastic sensitive element. A mechanical analysis and drawing test show that the strain of the force-measuring bolt is greater than 60 times the micro-strain of the fiber grating, which verifies the feasibility of the structure design of the FBG-FMB. Finally, through the field application in the coal mine roadway, the working conditions of the bolt body at the two measuring points of the roadway are obtained to verify the reliability of the force-measuring bolt. In addition, the desensitized FBG-FMB can be widely used in the supporting fields of underground engineering such as slopes, tunnels, and foundation pits.
Keywords: bolt supporting; force-measuring bolt; desensitization; fiber Bragg grating (FBG) sensors; drawing test bolt supporting; force-measuring bolt; desensitization; fiber Bragg grating (FBG) sensors; drawing test

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MDPI and ACS Style

Liang, M.; Song, Y.; Fang, X.; Jiang, Y.; Zhang, F.; Li, S.; Chen, N.; Xu, Z. Structural Design and Application of Desensitized FBG Force-Measuring Bolt. Sensors 2022, 22, 3930. https://doi.org/10.3390/s22103930

AMA Style

Liang M, Song Y, Fang X, Jiang Y, Zhang F, Li S, Chen N, Xu Z. Structural Design and Application of Desensitized FBG Force-Measuring Bolt. Sensors. 2022; 22(10):3930. https://doi.org/10.3390/s22103930

Chicago/Turabian Style

Liang, Minfu, Yang Song, Xinqiu Fang, Yuye Jiang, Fan Zhang, Shuang Li, Ningning Chen, and Ziyue Xu. 2022. "Structural Design and Application of Desensitized FBG Force-Measuring Bolt" Sensors 22, no. 10: 3930. https://doi.org/10.3390/s22103930

APA Style

Liang, M., Song, Y., Fang, X., Jiang, Y., Zhang, F., Li, S., Chen, N., & Xu, Z. (2022). Structural Design and Application of Desensitized FBG Force-Measuring Bolt. Sensors, 22(10), 3930. https://doi.org/10.3390/s22103930

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