Infrared Temperature Measurement and Simulation of Temperature Field on Buried Pipeline Leakage

The buried pipeline leakage often causes safety accidents. It is particularly important for rapid rush repair preventing the leakage diffusion to judge the leakage point position in time. Using infrared remote sensing equipment to quickly detect ground, the leakage point can be judged. Considering the buried pipeline as the research object, this paper shoots the variation characteristics of ground temperature field in pipeline leakage process by infrared thermographs instrument, puts forward the method that based on the temperature measurement principle of infrared radiation to detect pipeline leakage. The CFD software was used to simulate the temperature field of pipeline leakage, and built the pipeline leakage infrared imaging experiment. The results show that the temperature field can be separated into 3 regions after the pipeline leakage. The fist region is constant high temperature region, in which the water temperature will remain basically, the second is temperature gradient region, the temperature changes violently, and the third is soil natural temperature region, the temperature changes smaller.