在简述分布式光纤传感技术测温原理的基础上,从三维微元体传热过程出发,推导了具有渗漏和内热源的多孔介质传热微分方程,给出了基于温度测量的分布式光纤渗漏监测技术的不同监测方法的监测方程。最后,从持续线热源的角度,阐述了分布式光纤监测渗漏的基本原理。 Based on the principle of temperature distribution in distributed optical fiber sensing technology, the heat transfer differential equation of porous media with leakage and internal heat source is derived from the heat transfer process of three-dimensional micro-element, and the distribution based on temperature measurement is given Monitoring equations for different monitoring methods for fiber optic leak detection. Finally, from the perspective of continuous line heat source, the basic principle of distributed optical fiber monitoring leakage is described.