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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Measurement of Temperature and Relative Humidity with Polymer Optical Fiber Sensors Based on the Induced Stress-Optic Effect
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Measurement of Temperature and Relative Humidity with Polymer Optical Fiber Sensors Based on the Induced Stress-Optic Effect

机译：基于感应应力光学效应的聚合物光纤传感器测量温度和相对湿度

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摘要

This paper presents a system capable of measuring temperature and relative humidity with polymer optical fiber (POF) sensors. The sensors are based on variations of the Young’s and shear moduli of the POF with variations in temperature and relative humidity. The system comprises two POFs, each with a predefined torsion stress that resulted in a variation in the fiber refractive index due to the stress-optic effect. Because there is a correlation between stress and material properties, the variation in temperature and humidity causes a variation in the fiber’s stress, which leads to variations in the fiber refractive index. Only two photodiodes comprise the sensor interrogation, resulting in a simple and low-cost system capable of measuring humidity in the range of 5–97% and temperature in the range of 21–46 °C. The root mean squared errors (RMSEs) between the proposed sensors and the reference were 1.12 °C and 1.36% for the measurements of temperature and relative humidity, respectively. In addition, fiber etching resulted in a sensor with a 2 s response time for a relative humidity variation of 10%, which is one of the lowest recorded response times for intrinsic POF humidity sensors.
机译：本文提出了一种能够利用聚合物光纤（POF）传感器测量温度和相对湿度的系统。这些传感器基于温度和相对湿度变化的POF的杨氏和剪切模量的变化。该系统包括两个POF，每个POF都有预定义的扭转应力，由于应力-光学效应，导致光纤折射率发生变化。由于应力与材料特性之间存在相关性，因此温度和湿度的变化会导致纤维应力的变化，从而导致纤维折射率的变化。仅两个光电二极管构成传感器询问，从而形成了一种简单且低成本的系统，能够测量5–97％的湿度和21–46°C的温度。对于温度和相对湿度的测量，建议的传感器和参考之间的均方根误差（RMSE）分别为1.12°C和1.36％。另外，纤维蚀刻导致传感器具有2 s的响应时间，相对湿度变化为10％，这是固有POF湿度传感器记录的最低响应时间之一。

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