智能全分布式光纤应变传感精度的研究

Study on Distributed Fiber Optical Strain Sensing Precision

从力学的角度对分布式光纤应变传感的精度进行了系统的理论分析和实验研究,基于考虑光纤-基材之间的力学耦合作用,系统建立了两者耦合效应即应变传递的分析方法和分析模型,得到了应变传递关系的理论解答以及应变检测精度的范围.应变检测精度的实验结果略低于理论分析结果,表明所建立的理论分析方法具有一定的可靠性,从而为分布式光纤应变传感的优化设计及性能分析提供了理论参考.

A systematic theoretical analysis and experimental study are made of the distributed fiber optical strain sensing precision from the perspective of mechanics for the first time. Based on a consideration of the mechanical coupling action between optical fiber and matrix, the analytical approach and model for the coupling effect, namely, strain transfer relationship, are established systematically, the theoretical formulation and strain measurement precision range are obtained. The strain test precision results are slightly lower than those of the theoretical analysis, which validates certain reliability of the theoretical analytical method.