基于弱光栅的分段测斜算法研究

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中图分类号：TB9;TV168.1 文献标志码：A文章编号：1674-5124（2025）08-0054-08

Abstract： In order to improve the accuracy of overalland local displacement monitoring in the deep slope， a displacement monitoring system with ultra-weak reflection fiber Bragg grating as sensing unit is designed. It is also pointed out that the previous method of calculating the segmented displacement of the inclinometer tube using the quadratic integral method has the problem of inaccurate integral-domain values. Therefore， this paper optimizes the original inclinometer algorithm andimproves the integral-domain values.Through the experiments of hypothesis conditions and various corner deformations， it is proved that the optimized inclinometer algorithm is beter than the pre-optimization and the optimization algorithm is more advantageous under the condition of large corner：Under the assumed conditions，the absolute relative error of the optimization algorithm is reduced by 36.47% compared to the pre-optimization value. In the multi-angle experiment， when the maximum angle reaches 37∘ ， the absolute relative error can be reduced by up to 13% .In order to intuitively show the deformation of inclinometer tube，the theoretical derivation of the coordinate positioning of each measuring point is carried out， and the experimental results show that the results obtained by the inclinometer algorithm can reconstruct the measured deformation well.

Keywords： deep displacement monitoring; uwFBG; inclination measurement algorithm; slope monitoring

0 引言

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