Development of a low-cost and miniaturized fiber Bragg grating strain sensor system
Development of a low-cost and miniaturized fiber Bragg grating strain sensor system
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DOI：
10.7567/jjap.56.052502
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发表时间：
2017-04
影响因子：
1.5
通讯作者：
Lili Yuan;Yao Zhao;Shinya Sato
中科院分区：
文献类型：
--
作者：
Lili Yuan;Yao Zhao;Shinya Sato
提出了一种利用光纤光栅反射功率变化测量应变的光纤光栅应变传感系统。该系统采用半导体激光器作为光源，并采用功率计，使光纤光栅传感系统价格低廉，小型化。FBG的反射功率由FBG的反射率和激光二极管的光功率的乘积表示。实验测得的应变值与由反射功率计算得到的应变值的相对误差在5.1%以内，验证了本文提出的应变传感器系统的可行性。此外，在此方法的基础上，我们制作了一个悬臂梁称重传感器，使用光纤光栅作为应变片，而不是一个电阻，也量化的负载范围，可以通过这种称重传感器测量。
A fiber Bragg grating (FBG) strain sensor system that measures strains from reflected power changes of FBGs is presented. A laser diode used as a light source and a power meter are used in the system, which makes the FBG sensor system inexpensive and miniaturized. The reflected power of an FBG is expressed by the product of the reflectivity of the FBG and the optical power of the laser diode. Comparison of the strain applied in the experiment with that calculated from the reflected power shows that relative errors are within 5.1%, which verifies the feasibility of the strain sensor system proposed in this work. In addition, on the basis of this method, we fabricate a cantilever load cell using an FBG as the strain gauge instead of an electrical resistance, and also quantify the load range that can be measured by this load cell.