Optical Fiber Thermometer Based on Fiber Bragg Gratings

6th International Conference on Electronic Devices, Systems and Applications 2017

无线电电子学;工业技术

Rosli, Ekbal Bin^1 ; Noor, Uzer Mohd.^1

Bachelor of Engineering (Hons) Electronic Engineering, Faculty of Electrical Engineering, Universiti Teknologi Mara Shah Alam, Selangor

40450, Malaysia^1

关键词: Broadband Light Sources;    Liquid crystal display(LCD);    Measuring temperature;    Optical spectrum analyzer;    Physical parameters;    Physical quantities;    Sensing elements;    Surrounding temperature;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/340/1/012020/pdf
DOI  :  10.1088/1757-899X/340/1/012020

学科分类：工业工程学

来源: IOP

【 摘 要 】

Fiber Bragg grating has generated much interest in use as sensors to measure strain, temperature, and other physical parameters. It also the most common component used to develop this sensor with the advantages of simple, intrinsic sensing elements, electrically passive operation, EMI immunity, high sensitivity, compact size and potentially low cost [6]. This paper reports the design of an optical fiber thermometer based on fiber Bragg gratings. The system was developed for detecting temperature and strain by monitoring the shift of Bragg wavelength. The shifting of Bragg wavelength is used to indicate the temperature and strain due to the change in the surrounding temperature and strain. When the temperature and strain reach the exact wavelength level of the system, the temperature and strain value will display on the Arduino liquid crystal display (LCD). The optical fiber will provide the broadband light source and after passing the FBG the Bragg wavelength into the optical spectrum analyzer (OSA). The system is based on FBG as a physical quantity sensor. The temperatures measured is taken from the water bath and that of the strain is provided by amount of slotted mass used. The outcome of this project is to characterize the Bragg wavelength shifting from the fiber Bragg grating output. As the conclusion, this project provides an efficient optical fiber thermometer in measuring temperature and strain in order to replace the use of conventional electrical instruments.