Output Characteristics of the Displacement Sensor with Two-Circle Reflective Coaxial Fiber

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Output Characteristics of the Displacement Sensor with Two-Circle Reflective Coaxial Fiber

更新时间：2025-07-09

- Output Characteristics of the Displacement Sensor with Two-Circle Reflective Coaxial Fiber
- Vol. 46, Issue 3, Pages: 27-30(2012)
- 作者机构：
  
  西安交通大学机械工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TH117.2;TH741
- Online First：10 March 2012，
  
  Published：2012
- 稿件说明：
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Output Characteristics of the Displacement Sensor with Two-Circle Reflective Coaxial Fiber[J]. 2012, 46(3): 27-30.
DOI：

Output Characteristics of the Displacement Sensor with Two-Circle Reflective Coaxial Fiber[J]. 2012, 46(3): 27-30. DOI：

摘要

为了利用双圈同轴式光纤位移传感器准确测得旋转机械中滑动轴承的润滑膜厚度

分析了反射面形状以及润滑油折射率对双圈同轴式光纤位移传感器输出特性的影响.利用几何光学分析方法

建立了反射面为球面时的光纤传感器输出函数的数学模型

分析了润滑油折射率对光纤入射角的影响.结果表明:当传播介质的折射率大于1时

光纤最大入射角减小; 当反射面曲率半径减小时

传感器的灵敏度会降低; 与光线在空气中传播相比

传播介质为润滑油时

随着传播介质折射率的增大

传感器的灵敏度降低.因此

在利用双圈同轴位移传感器进行滑动轴承的润滑膜厚度监测时

必须对传感器进行重新标定.

Abstract

The effects of the reflective surface configuration and the refractive index of lubricating oil on the characteristics of the displacement sensor of two-circle reflective coaxial fiber

which is used to measure the thickness of the lubricating oil film

is analyzed. An output function of the fiber sensor with spherical reflective surface is gained and the effect of refractive index of lubricating oil on the maximum incidence angle is analyzed by geometrical optics. The refractive index of the lubricating oil decreases the maximum incidence angle of fibers. The simulation and the experiment indicate that the sensibility of sensors decreases when the reflector changed from flat to curved and in the propagation medium varying from gas into lubricating oil

which leads to the necessity of recalibration when the sensors are applied to monitoring the thickness of the lubricating oil film.

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references

孙圣和,王廷云,徐颖. 光纤测量与传感技术 [M].哈尔滨:哈尔滨工业大学出版社,2000:15-40.

CHOWDHURY S, LAUGIER M T. Thin film stress measurement by instrumented optical fibre displacement sensor [J]. Applied Surface Science, 2007,253(9): 4289-4294.

PERRONE G, VALLAN A. A low-cost optical sensor for noncontact vibration measurements [J]. IEEE Transactions on Instrumentation and Measurement, 2009, 58(5): 1650-1656.

杨亮,张小栋. 双圈同轴光纤束位移传感器研究 [J]. 振动、测试与诊断,2009,29(2):192-196.

YANG Liang, ZHANG Xiaodong. Displacement sensor of two-circle reflective coaxial fiber bundle [J]. Journal of Vibration, Measurement Diagnosis, 2009, 29(2):192-196.

YUAN L B. The analysis of the compensation mechanism of a fiber optic displacement sensor [J]. Sensors and Actuators, 1993, 36(3):177-182.

杨华勇.反射式强度型光纤传感器强度调制特性的数学模型与关键技术的研究 [D].长沙:国防科技大学,2002.

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