Isah Balarabe Wada, Mohamad Hisham
Civil and Environmental Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar Perak 32610, Malaysia.
Department of Civil Engineering, Bayero University Kano, PMB 3011 Kano, Nigeria.
Sensors (Basel). 2021 Apr 22;21(9):2926. doi: 10.3390/s21092926.
The paper explores the possibility of using high-resolution fiber Bragg grating (FBG) sensing technology for on-specimen strain measurement in the laboratory. The approach provides a means to assess the surface deformation of the specimen, both the axial and radial, through a chain of FBG sensor (C-FBG), in a basic setup of a uniaxial compression test. The method is cost-effective, straightforward and can be commercialized. Two C-FBG; one was applied directly to the sample (FBG), and the other was packaged (FBG) for ease of application. The approach measures the local strain with high-resolution and accuracy levels that match up to the existing local strain measuring sensors. The approach enables the evaluation of small-strain properties of the specimen intelligently. The finite element model analysis deployed has proven the adaptability of the technique for measuring material deformation. The adhesive thickness and packaging technique have been shown to influence the sensitivity of the FBG sensors. Owing to the relative ease and low-cost of instrumentation, the suggested method has a great potential to be routinely applied for elemental testing in the laboratory.
本文探讨了在实验室中使用高分辨率光纤布拉格光栅（FBG）传感技术进行试样应变测量的可能性。该方法提供了一种手段，通过光纤布拉格光栅传感器链（C-FBG），在单轴压缩试验的基本设置中评估试样的轴向和径向表面变形。该方法具有成本效益、操作简单且可商业化。两个C-FBG；一个直接应用于样品（FBG），另一个进行了封装（FBG）以便于应用。该方法以与现有局部应变测量传感器相匹配的高分辨率和精度水平测量局部应变。该方法能够智能地评估试样的小应变特性。所采用的有限元模型分析证明了该技术在测量材料变形方面的适应性。已表明粘合剂厚度和封装技术会影响FBG传感器的灵敏度。由于仪器安装相对简便且成本较低，所建议的方法在实验室进行元素测试方面具有很大的常规应用潜力。
