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Raman Distributed Temperature Sensor with Optical Dynamic Difference Compensation and Visual Localization Technology for Tunnel Fire Detection

Authors :
Baoqiang Yan
Jian Li
Mingjiang Zhang
Jianzhong Zhang
Lijun Qiao
Tao Wang
Source :
Sensors, Vol 19, Iss 10, p 2320 (2019)
Publication Year :
2019
Publisher :
MDPI AG, 2019.

Abstract

The field of tunnel fire detection requires a Raman distributed temperature sensor (RDTS) with high-accuracy and visual localization. A novel temperature demodulation method to improve the temperature measurement accuracy of the RDTS systems is presented. This method is based on the optical dynamic difference compensation algorithm, which can eliminate the optical power fluctuation. In addition, the visual localization technology is presented by using the longitudinal lining model (LLM) of a three-dimensional (3D) temperature display, which enhances the engineering application of RDTS in tunnel fire detection. Experimental results indicate that the temperature measurement accuracy is optimized from 7.0 °C to 1.9 °C at the sensing distance of 18.27 km by using the presented method. We provide a solution for temperature field monitoring as well as fire visual localization of the tunnel through RDTS systems.

Details

Language :
English
ISSN :
14248220
Volume :
19
Issue :
10
Database :
Directory of Open Access Journals
Journal :
Sensors
Publication Type :
Academic Journal
Accession number :
edsdoj.7301c58dc34044a79943bb7ef35c1206
Document Type :
article
Full Text :
https://doi.org/10.3390/s19102320