JRMGE / Vol 14 / Issue 2
A fiber Bragg grating based earth and water pressures transducer with three-dimensional fused deposition modeling for soil mass
Yue Qin, Qiankun Wang, Dongsheng Xu, Jiaming Yan, Shanshan Zhang
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School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, 430070, China
2022, 14(2): 663-669. doi:10.1016/j.jrmge.2021.07.009
Received: 2021-03-22 / Revised: 2021-06-03 / Accepted: 2021-07-17 / Available online: 2021-09-20
2022, 14(2): 663-669.
doi:10.1016/j.jrmge.2021.07.009
Received: 2021-03-22
Revised: 2021-06-03
Accepted: 2021-07-17
Available online: 2021-09-20
A novel fiber Bragg grating (FBG) sensor with three-dimensional (3D) fused deposition modeling (FDM) approach is proposed for effective stress measurement in soil mass. The three-diaphragm structure design is developed to measure earth and water pressures simultaneously. The proposed transducer has advantages of small size, high sensitivity, low cost, immunity to electromagnetic interference and rapid prototyping. The working principle, design parameters, and manufacturing details are discussed. The proposed transducer was calibrated for earth and water pressures measurement by using weights and a specially designed pressure chamber, respectively. The calibration results showed that the wavelength of the transducer was proportional to the applied pressure. The sensitivity coefficients of the earth and water pressures were 12.633 nm/MPa and 6.282 nm/MPa, respectively. Repeated tests and error analysis demonstrated the excellent stability and accuracy of the earth and water pressure measurements. The performance of the proposed transducer was further verified by a model experimental test and numerical analysis, which indicated that the proposed transducer has great potential for practical applications.
Keywords: Fused deposition modeling (FDM), Fiber bragg-grating (FBG) sensor, Earth pressure, Water pressure
Article Data
Author(s) Information
Dongsheng Xu
✉️ dsxu@whut.edu.cn
Dongsheng Xu obtained his MSc degree from the Institute of Rock and Soil Mechanics, Chinese Academy of Sciences (CAS) and PhD degree from The Hong Kong Polytechnic University. He is professor of Geotechnical Engineering at the Wuhan University of Technology, and he is the head of the research center of Smart Infrastructure and Safety Protection (SISP), School of Civil Engineering and Architecture, Wuhan University of Technology. He has been involved in geotechnical and geology engineering research for more than 10 years. He is in charge of three projects supported by the National Natural Science Foundation of China including the National Science Fund for Excellent Young Scholars and eight research projects funded by Power China, China Railway Construction Corporation Limited, China Highway Engineering Consultants Corporation, and others. He has authored over 50 papers and 7 national patents. He is served as a council member of committee for Ocean Engineering Geology and Intelligent Monitoring Branch of Geology and Geotechnical Engineering.