Thermal pipeline abnormal state determining method based on infrared thermal imagery technology

Abstract

The invention discloses a thermal pipeline abnormal state determining method based on infrared thermal imagery technology. The method is used to photograph the ground surface of the thermal pipeline under suitable weather conditions to obtain the infrared thermal image of an area with abnormal temperature and the infrared thermal image of an area with normal temperature respectively. The infrared thermal processing software is utilized to obtain respectively the average temperature T2 of the ground surface of the area with abnormal temperature, the average temperature T0,2 of the ground surface of the area around the area with abnormal temperature and with no pipeline, the average temperature T1 of the ground surface of the area with normal temperature, and the average temperature T0,1 of the ground surface of the area around the area with normal temperature and with no pipeline around; and calculating to obtain the thermal pipeline abnormal state determining coefficient Beta to determine the abnormal state of the thermal pipeline. The method of the invention is capable of directly, rapidly and accurately position the leakage point and the broken point of a heat preserving layer of a thermal pipeline.

Description

technical field [0001] The invention relates to the field of state detection of thermal pipelines, in particular to a method for judging abnormal conditions of thermal pipelines based on infrared thermal imaging technology. Background technique [0002] When the heat medium is transported in the heat pipeline, the transportation efficiency of the heat pipeline is reduced due to unbalanced loss and poor insulation, and even production accidents such as heat pipeline leakage and insulation layer damage occur, which cause great energy waste and property loss. In addition, most thermal pipelines are directly buried, which makes it very difficult to find the leakage point of the thermal pipeline and the damaged point of the insulation layer. When the thermal insulation layer of the direct-buried thermal pipeline is damaged, a high-temperature heat source will be formed at the damaged part to heat the surrounding soil. An obvious temperature anomaly area will be formed. When a d...

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Problems solved by technology

The acoustic vibration leak detection method can only detect the leakage point of the thermal pipeline, but cannot detect the damage of the insulation layer of the thermal pipeline, and requires a high level of experience of the staff. It is suitable for pipelines with shallow buried depths and is susceptible to interference from other sounds

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