Infrared Temperature Measurement and Simulation of Temperature Field onBuried Pipeline Leakage

摘要

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