A Polymer Optical Fiber Temperature Sensor Based on Material Features

Sensors

Maria José Pontes¹  Arnaldo Leal-Junior²  Anselmo Frizera-Neto²  Carlos Marques³ 

[1] I3N, University of Aveiro, 3810-193 Aveiro, Portugal;Graduate Program of Electrical Engineering, Federal University of Espirito Santo, Vitória-ES 29075-910, Brazil;;Instituto de Telecomunicações and Physics Department &

关键词: polymer optical fiber;    temperature sensor;    dynamic mechanical analysis;   

DOI  :  10.3390/s18010301

来源: DOAJ

【 摘 要 】

This paper presents a polymer optical fiber (POF)-based temperature sensor. The operation principle of the sensor is the variation in the POF mechanical properties with the temperature variation. Such mechanical property variation leads to a variation in the POF output power when a constant stress is applied to the fiber due to the stress-optical effect. The fiber mechanical properties are characterized through a dynamic mechanical analysis, and the output power variation with different temperatures is measured. The stress is applied to the fiber by means of a 180° curvature, and supports are positioned on the fiber to inhibit the variation in its curvature with the temperature variation. Results show that the sensor proposed has a sensitivity of 1.04 × 10−3 °C−1, a linearity of 0.994, and a root mean squared error of 1.48 °C, which indicates a relative error of below 2%, which is lower than the ones obtained for intensity-variation-based temperature sensors. Furthermore, the sensor is able to operate at temperatures up to 110 °C, which is higher than the ones obtained for similar POF sensors in the literature.

【 授权许可】

Unknown