Detecting identifying and positioning method for fire-fighting water pipe network leakage

Abstract

The invention discloses a detecting identifying and positioning method for fire-fighting water pipe network leakage, and belongs to the field of fire safety. The method includes the steps of (1) multiple sets of vibrating sensors collect fire-fighting water pipe network acoustic emission signals synchronously; (2) a correlation matrix is established through synchronizing signals, whether leakage occurs or not is judged, and leaking pipelines are identified if the leakage occurs; (3) data detected by the sensors in the direction of the leaking pipelines are extracted; (4) EEMD and energy feature extraction decomposition are carried out to obtain an IMF containing leakage source information; (5) cross-correlation analysis is carried out on multiple sets of IMF data to obtain a time difference, and positions of leakage points are calculated; (6) the positions of multiple sets of leakage points are weighted to obtain finial positions of the leakage points. According to the method, the problem that extinguishment water pressure or flow is insufficient due to fire-fighting water pipe network leakage is solved, and a fire-fighting water pipe network can be really used when needed.

Description

technical field [0001] The invention belongs to the field of fire safety, and relates to a method for detecting, identifying and locating leakage of a fire water pipe network. Background technique [0002] In recent years, indoor fires in large high-rise buildings have occurred frequently. However, when a fire breaks out, the fire cannot be well controlled. Many reasons are due to the leakage of the fire water pipe network, which leads to insufficient pressure in the fire pipes, and cannot guarantee the minimum water pressure and flow requirements of fire hydrants, fire sprinklers, etc. . Since the fire-fighting water pipe network is in the state of fire-fighting preparation for a long time, in order to ensure the normal operation of the fire-fighting system, it is of great significance to detect and locate the leakage of the fire-fighting water pipe network. [0003] Due to the complexity of the pipeline laying and the high complexity of the pipeline, the fire pipe networ...

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Problems solved by technology

[0005] At present, due to the complexity of the fire water pipe network, various reflection phenomena will occur at different pipe interfaces. The collected signals contain multiple frequency components, have multi-modality and dispersion characteristics, and there are various noise interferences, making it difficult to effectively Extract the characteristic information of the leakage source in the signal, especially when the fire-fighting pipeline overlaps with other pipelines, it is more likely to cause false water leakage signals. How to improve the reliability of the fire-fighting pipeline leakage and accurately locate the leakage under the complex background and strong noise interference The leak is still blank

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