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- Title
Raman Distributed Temperature Sensor with Optical Dynamic Difference Compensation and Visual Localization Technology for Tunnel Fire Detection.
- Authors
Yan, Baoqiang; Li, Jian; Zhang, Mingjiang; Zhang, Jianzhong; Qiao, Lijun; Wang, Tao
- 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.
- Subjects
TUNNEL detection; FIRE prevention; TEMPERATURE sensors; RAMAN effect; OPTICAL fiber detectors
- Publication
Sensors (14248220), 2019, Vol 19, Issue 10, p2320
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s19102320