| Citation: |
FANG Xinqiu，WU Yang，SONG Yang，et al. Research on fault monitoring of belt conveyor based on FBG sensor[J]. Coal Science and Technology，2025，53（1）：326−340. DOI: 10.12438/cst.2024-1040
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The fault monitoring of belt conveyors serves as a pivotal tool in preventing safety incidents, enhancing production efficiency, and facilitating the intelligent operation of equipment. This comprehensive study delves into the multi-sensor fault monitoring of belt conveyors utilizing Fiber Bragg Gratings (FBGs), examining aspects such as common fault analysis, the composition of integrated protection systems, the design and analysis of fiber-optic sensor arrays, and the design and material selection of core sensing elements.Firstly, to address the shortcomings of traditional monitoring methods, including the inability to quantify faults, inadequate real-time performance, and weak data fusion capabilities, an FBG-based integrated protection system for belt conveyors is proposed. This system underscores the cruciality of designing a fiber-optic sensor array as a fundamental prerequisite for system establishment.Secondly, building upon an analysis of the root causes and manifestations of common faults in belt conveyors, a series of fault monitoring sensors are devised, with FBG-based equal-strength cantilever beams serving as the core sensing elements. These sensors constitute the fiber-optic sensor array within the integrated protection system, enabling real-time and quantitative fault monitoring.Thirdly, theoretical analyses and Ansys finite element simulations are conducted to thoroughly investigate the dimensional design and material selection of FBG-based equal-strength cantilever beams. The influencing factors on sensitivity and accuracy are analyzed within the sensing model, guiding the determination of the structural dimensions of the sensing elements. Nylon 6 is selected as the optimal material for fabrication.Finally, experimental validation is performed to assess the structural effectiveness, sensitivity, and stability of the FBG-based equal-strength cantilever beams. In sensitivity tests, the sensing elements exhibit exceptional linear response characteristics, with a theoretical sensitivity of
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