Leakage identification positioning method and device based on temperature space-time distribution diagram

Abstract

The invention provides a leakage identification positioning method and device based on a temperature space-time distribution diagram. The method comprises acquiring the actually measured temperature change values of a plurality of measuring points on the periphery of the object to be measured at interval preset time length, generating the temperature space-time distribution diagram according to the actually measured temperature change values; based on the same spatial information, extracting the identification information of a plurality of nodes which carry the same spatial information and aresuccessively continuous on the time information; identifying the identification information of the plurality of nodes, and detecting whether the change conditions of the identification information ofthe plurality of nodes meet the first preset rule; if the first preset rule is not met, determining that the measuring point represented by the plurality of nodes carrying the same spatial information has leakage, and storing the spatial information of the measuring point represented by the plurality of nodes. In the actual engineering application process, according to the scheme, effective identification and positioning of the leakage measuring point can be realized, and natural disasters caused by leakage phenomena can be avoided.

Description

technical field [0001] The invention relates to the technical field of engineering leakage identification and positioning, in particular to a leakage identification and positioning method and device based on a temperature-time-space distribution map. Background technique [0002] When using the optical fiber temperature measurement method to continuously monitor the leakage of earth-rock dams and pipelines, it is necessary to lay cables in the soil layer at the same time, and regularly heat the cables to monitor the temperature changes in the soil layer during the cable process in real time by using optical fibers. The area where the leak occurs is identified based on the temperature change value. At present, the temperature distribution curve is mainly used to identify the leakage area, and the concave section of the temperature curve is often used as the potential leakage area. However, under the condition of cable heating, due to the inhomogeneity of the layer around the...

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Problems solved by technology

However, under the condition of cable heating, due to the inhomogeneity of the layer around the optical fiber, the temperature rise of the soil is not uniform, which amplifies the fluctuation of the temperature distribution curve and interferes with the leakage identification effect, making it difficult for related methods to deal with the problem. For practical engineering applications

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