Petroleum & Marine Division, Korea Institute of Geoscience and Mineral Resources, 124 Gwahak-ro, Yuseong-gu, Daejeon 34132, Korea.
Department of Electrical Engineering and Smart Grid Research Center, Chonbuk National University,567 Baekje-daero, Deokjin-gu, Jeonju 54896, Korea.
Sensors (Basel). 2018 Nov 16;18(11):4009. doi: 10.3390/s18114009.
The intensity-based fiber optic sensor (FOS) head using twisted dual-cycle bending loss is proposed and experimentally demonstrate. The bending loss characteristics depend on the steel wire radius, number, and distance. To determine the effects of these parameters, two samples in each of seven configuration cases of the proposed FOS head were bonded to fiber reinforced plastics coupons, and tensile and flexural strain tests were repeated five times for each coupon. The bending loss of the manufactured FOS heads was measured and converted to the tensile and flexural strain as a function of configuration cases. The measurement range, sensitivity, and average measurement errors of the tensile load and flexural strain were 4.5 kN and 1,760 , 0.70 to 3.99 dB/kN and 0.930 to 6.554 dB/mm, and 57.7 N, and 42.6 , respectively. The sensing range of FOS head were 82 to 138 mm according to configuration cases. These results indicate that it is possible to measure load, tensile strain, and flexural strain using the proposed FOS head, and demonstrate that the sensitivities, the operating ranges, and the sensing range can be adjusted depending on the deformation characteristics of the measurement target.
提出并实验验证了一种基于强度的光纤传感器（FOS）头部，采用扭曲双循环弯曲损耗。弯曲损耗特性取决于钢丝半径、数量和距离。为了确定这些参数的影响，在纤维增强塑料试件上分别粘贴了七个配置案例中的每个案例的两个样本，并对每个试件重复进行了五次拉伸和弯曲应变测试。测量了制造的 FOS 头部的弯曲损耗，并将其转换为拉伸和弯曲应变作为配置案例的函数。拉伸载荷和弯曲应变的测量范围、灵敏度和平均测量误差分别为 4.5 kN 和 1,760 、 0.70 至 3.99 dB/kN 和 0.930 至 6.554 dB/mm 以及 57.7 N 和 42.6 。根据配置案例，FOS 头部的传感范围为 82 至 138 mm。这些结果表明，使用所提出的 FOS 头部可以测量载荷、拉伸应变和弯曲应变，并且证明灵敏度、工作范围和传感范围可以根据测量目标的变形特性进行调整。
