基于分布式光纤传感技术的封闭空间火源精确定位方法研究

为了解决封闭空间火源精确定位困难的问题,文中提出了一种基于拉曼散射的分布式光纤传感技术的火源精确定位方法,对比分析了分布式拉曼测温系统在温度测量领域的优势,简化了封闭空间火场的火源模型,在分析温度与后向拉曼散射光的关系特性的基础上,给出了传感光纤布阵方案和火源粗略、精确定位的数学模型,并通过实验验证了方法的有效性,实验结果表明本方法定位误差范围可控制在54cm^2以内.此方法解决了封闭空间火灾火源定位精度低的问题,为分布式光纤传感技术在二维、三维空间传感领域提供了一定的理论基础.

Research on Precise Location Method of Closed Space Fire Source Based on Distributed Optical Fiber Sensing Technology

In order to solve the difficulty of accurately locating of fire origin in enclosed space,this paper propose a method based on Raman scattering distributed optical fiber sensing technology.The advantages of distributed Raman temperature measurement system in the field of temperature measurement are compared and analyzed,which simplifies the model of fire origin in enclosed fire field.Based on the analysis of the relationship between temperature and backraman scattering light,the scheme of sensor fiber array and the mathematical model of roughly and accurately locating the fire source are given.The mathematical model location of fire source is verified by experiments.The experimental results show that the locating error range of this method can be controlled within 54 cm^2.This method solves the problem of low location accuracy of fire source in closed space and provides a theoretical basis for distributed optical fiber sensing technology in the field of two-dimensional and three-dimensional space sensing.