Song Yang, Fang Xinqiu, Wu Gang, Chen Ningning, Liang Minfu, Xu Ziyue, Zhang Fan
School of Mines, China University of Mining and Technology, Xuzhou 221116, China.
Research Center of Intelligent Mining, China University of Mining and Technology, Xuzhou 221116, China.
Sensors (Basel). 2022 Aug 25;22(17):6399. doi: 10.3390/s22176399.
The accurate perception of straightness of a scraper conveyor is important for the construction of intelligent working faces in coal mines. In this paper, we propose a precision compensation model based on rotation error angle to improve the accuracy of the fiber Bragg grating (FBG) curvature sensor of a scraper conveyor. The correctness of the model is verified by theoretical analysis, numerical simulation, and experiments. Finally, the feasibility of the model is analyzed and discussed for field application in a coal mine. When the rotation error angle is within the range of 0~90°, according to the strain of FBG obtained by numerical simulation, the radius of the curvature is inversely calculated by the compensation model. The relative error of each discrete point is within ±0.9%, and the relative error after fitting is less than 0.2%. The experiment shows that the relative error of the curvature radius after fitting according to the theoretical formula is less than ±3%, and the relative error of the curvature radius value obtained by the inverse deduction of each discrete point is less than ±6%, which verifies the correctness and applicability of the compensation model. In addition, the compensation model with the FBG curvature sensor has broad application prospects in coal mine underground conveyors, submarine pipelines and ground pipelines.
刮板输送机直线度的精确感知对于煤矿智能化工作面的建设至关重要。本文提出了一种基于旋转误差角的精度补偿模型，以提高刮板输送机光纤布拉格光栅（FBG）曲率传感器的精度。通过理论分析、数值模拟和实验验证了该模型的正确性。最后，对该模型在煤矿现场应用的可行性进行了分析和讨论。当旋转误差角在0~90°范围内时，根据数值模拟得到的FBG应变，利用补偿模型反算曲率半径。各离散点的相对误差在±0.9%以内，拟合后的相对误差小于0.2%。实验表明，根据理论公式拟合后的曲率半径相对误差小于±3%，各离散点反推得到的曲率半径值相对误差小于±6%，验证了补偿模型的正确性和适用性。此外，带有FBG曲率传感器的补偿模型在煤矿井下输送机、海底管道和地面管道中具有广阔的应用前景。
