Fire Source Localization Based on Distributed Temperature Sensing by a Dual-Line Optical Fiber System

Miao Sun,Yuquan Tang,Shuang Yang,Markus Sigrist,Jun Li,Fengzhong Dong

doi:10.3390/s16060829

Abstract

We propose a method for localizing a fire source using an optical fiber distributed temperature sensor system. A section of two parallel optical fibers employed as the sensing element is installed near the ceiling of a closed room in which the fire source is located. By measuring the temperature of hot air flows, the problem of three-dimensional fire source localization is transformed to two dimensions. The method of the source location is verified with experiments using burning alcohol as fire source, and it is demonstrated that the method represents a robust and reliable technique for localizing a fire source also for long sensing ranges.

Highlights

Fire detection techniques play an important role in various areas by providing assistance to reduce the economic and ecological damage as well as casualties [1,2]
The distributed temperature sensor (DTS) has been widely used in many areas due to its unique advantages, such as immunity to electromagnetic fields, easiness of installing wire, remote distributed measurement compared with the conventional temperature sensors [16,17,18,19,20]
We present a new method for localizing a fire source with a distributed temperature sensor (DTS)

Summary

Introduction

Fire detection techniques play an important role in various areas by providing assistance to reduce the economic and ecological damage as well as casualties [1,2]. The proposed methods yield good results as long as the fire source is close to the sensor array. An optical fiber distributed temperature sensor (DTS) system is a kind of real-time and continuous monitoring space temperature field sensing technology [12,13]. The DTS has been widely used in many areas due to its unique advantages, such as immunity to electromagnetic fields, easiness of installing wire, remote distributed measurement compared with the conventional temperature sensors [16,17,18,19,20]. With an optical fiber as the sensing element, the DTS can realize temperature monitoring with long-distance and wide range, which solves the deficiency of the sensor arrays. The experimental results show that the proposed method provides a reliable fire source location for long sensing ranges

Theory of the DTS System

Theory of the Fire Source Localization

The pulsepulse of light from afiber pulsed laser operating

Results and Discussion

Conclusions