提出一种由双玻璃纤维薄片、石英光纤布拉格光栅,及两段玻璃纤维护管组成的,并采用高温胶黏剂封装的片式应变传感器。该传感器不含金属材料,不受强电力电磁干扰。制备出3个传感器原型,将其安装在等强度悬臂梁上进行全面的性能测试实验。测试结果表明:3个传感器均具有良好的测量重复性(误差小于3.43%)和线性(线性拟合系数均大于0.999),应变灵敏度一致性高;温度补偿误差在22 pm以内,补偿能力良好;还具有良好的抗蠕变性能。因此,所设计的传感器具有优越的测量性能,能够满足野外环境下电力设施的长期应变监测要求。

This study proposes a sheet strain sensor comprising two glass-fiber flakes, a silica fiber Bragg grating, and two glass-fiber tubes that is packaged by a high temperature-resistant adhesive. The strain sensor contains no metal material, facilitating resistance to strong power and electromagnetic interference. Three sensor prototypes are manufactured and arranged on a constant strength cantilever beam for comprehensive performance test. Experimental results show that all three sensors possess good measuring repeatability (repeatability error <3.43%), fitting linear correlation coefficients (>0.999), and consistency for measuring sensitivities. The sensors also demonstrate good temperature compensation ability (within 22 pm) and creep resistance. These test results indicate that the proposed sensor has a superior measurement performance and can meet the requirements of long-term strain monitoring for electric power facilities in the wild.