Segmentation Reconstruction Study of FBG Non-uniform Strain Distribution of Roller Press Surface
The traditional reconstruction method can not well reconstruct the characteristics of local sudden change of strain when the structure is damaged.To monitor the internal damage of roll surface,a method of segmentation reconstruction of non-uni-form strain was proposed based on FBG sensors.Combined with improved transfer matrix method,the feasibility of segmentation reconstruction method was deduced.Based on improved differential evolution algorithm,the strain distribution under different work conditions was reconstructed and analyzed by segmentation reconstruction method.The results show that under normal working conditions,both the two methods can reconstruct non-uniform strain well.While the root mean square error of the segmented re-construction method is 4.505 με,which is smaller than that of the traditional method(18.991 με)in the damaged state.The segmentation reconstruction method proposed has certain generalization ability and can adapt to the non-uniform strain reconstruc-tion under different working conditions.
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