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本文按照文献[1]所提供的理论模型,计算了各类光纤(塑料、石英、玻璃光纤)的弯曲半径R,光纤半径a对光纤传感器的光衰减率γ或光相对传输率T的影响。计算结果表明大部分溶液R取0.5mm,a取1mm为最佳,并得到了实验证实。而对某些接近光纤折射率的溶液测定,则R不能取得过小,a也不能取得过大。计算结果分别与硫酸、乙醇、氯化钠溶液的实验结果进行了比较,均得到了比较满意的结果。
In this paper, according to the theoretical model provided in [1], the influence of bending radius R, optical fiber radius a, on the optical attenuation rate γ or optical relative transmission rate T of optical fiber sensors is calculated for various optical fibers (plastic, quartz and glass optical fiber). Calculation results show that most of the solution R take 0.5mm, a take 1mm is the best, and has been experimentally confirmed. However, for some solutions that approach the refractive index of the fiber, R can not be made too small and a can not be too large. The calculated results were compared with the experimental results of sulfuric acid, ethanol and sodium chloride solution respectively, and satisfactory results were obtained.