TY  - JOUR
PY  - 2019//
TI  - Raman distributed temperature sensor with optical dynamic difference compensation and visual localization technology for tunnel fire detection
JO  - Sensors (Basel)
A1  - Yan, Baoqiang
A1  - Li, Jian
A1  - Zhang, Mingjiang
A1  - Zhang, Jianzhong
A1  - Qiao, Lijun
A1  - Wang, Tao
SP  - s19102320
EP  - s19102320
VL  - 19
IS  - 10
N2  - 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.<p />  <p>Language: en</p>
LA  - en
SN  - 1424-8220
UR  - http://dx.doi.org/10.3390/s19102320
ID  - ref1
ER  -