The accuracy of straightness monitoring of scraper conveyors seriously restricts the development of unmanned mining technology in underground coal mines. Fiber Bragg grating (FBG) sensors have the characteristics of passive intrinsic safety and have broad application prospects in coal mine underground monitoring technology. In this paper, the motion characteristics between two adjacent Middle Chutes of the scraper were fully analyzed, the mathematical expressions were illustrated, furthermore, a 3D vector sensor is designed and manufactured using FBG sensors. The calibration and testing of the appropriate number of sensors was realized, and the test results showed that the FBG 3D vector sensor we designed can be used to measure the straightness of the scraper conveyor. The research introduces three main contributions: (1) a novel mathematical model characterizing the motion between adjacent scrapers; (2) the design and fabrication of a 3D vector sensor based on FBG technology; and (3) experimental validation through calibration and testing. Results demonstrate that the developed sensor system effectively measures Middle Chutes straightness with accuracy meeting practical application requirements.
Du et al. (Thu,) studied this question.
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