Xie Siying, Zhang Xiaodong, Wu Bing, Xiong Yiwei
Opt Express. 2018 Sep 17;26(19):25244-25256. doi: 10.1364/OE.26.025244.
A two-circle coaxial optical fiber bundle is a type of optical sensor which has been widely used in non-contact radial displacement measurement applications. This paper has focused on output characteristics of a two-circle coaxial optical fiber bundle used as a measurement unit in a probe designed to measure a three-dimensional tip clearance. First, a model that could calculate intensity point-by-point on each receiving fiber with a simplified algorithm of overlap area was established, an aperture angle compensation algorithm was then proposed to improve the performance of the model. In order to test the reliability of the model, an experiment was done with different three-dimensional displacement of the reflector. Comparison between experimental and simulation results indicates the model built in this article could better describe how three-dimensional displacement of reflector affects the output of the bundle than previous studies.
双圆同轴光纤束是一种光学传感器，已广泛应用于非接触式径向位移测量应用中。本文重点研究了双圆同轴光纤束作为测量单元在用于测量三维叶尖间隙的探头中的输出特性。首先，建立了一个模型，该模型可以通过重叠面积的简化算法逐点计算每个接收光纤上的强度，然后提出了一种孔径角补偿算法来提高模型的性能。为了测试模型的可靠性，对反射器进行了不同三维位移的实验。实验结果与模拟结果的比较表明，本文建立的模型比以前的研究能够更好地描述反射器的三维位移如何影响光纤束的输出。
