A third-party damage detection method and detection system for gas pipelines

Abstract

The invention discloses a gas pipeline third-party-damage-prevention detection method and detection system capable of combining optical fiber vibration and sound signal two work principles. The problem that in the actual engineering application, when any one of the vibration optical fiber detection technology or sound signal detection technology is singly applied, technical needs of third party damage detection accuracy and the missing report rate in the gas pipeline complex outdoor environment cannot be completely met is solved. According to the different gas pipeline embedded along-line outdoor environment conditions, in combination with the application condition of the vibration optical fiber detection technology and the sound signal detection technology, two detection technology methods are used in a partitioned and segmented mixed manner, third party damage detection of the gas pipeline along the line is achieved, cross-region long-distance third party damage prevention detectionof the gas pipeline under the along-line different outdoor environments is achieved, third-party damage detection accuracy is obviously improved, the false alarm rate is reduced, and the total building cost of a third-party-damage-prevention system can be saved.

Description

Technical field: [0001] The present invention relates to the technical field of perimeter security, in particular to a system that can significantly improve the accuracy of alarms, reduce the false alarm rate, and reduce the Anti-third-party sabotage system construction and maintenance costs of the gas pipeline anti-third-party sabotage detection method and detection system. Background technique: [0002] At present, the main anti-third-party damage detection technology is the audio signal analysis technology based on the principle of geophysical sensing and the distributed vibration optical fiber sensing technology based on the principle of optical time domain reflection OTDR. These two types of technologies start from the perspective of sensing the physical characteristics of third-party damage , Analyze and warn of third-party sabotage. However, due to the influence of natural environmental factors (soil, rain, temperature and other environmental differences) and outdoor...

AI Technical Summary

Problems solved by technology

[0005] Disadvantages: Not suitable for the environment of crossing rivers and bridges; the structure of the sensing unit is complicated; the embedding in the farmland is vulnerable to man-made damage; the economy of long-distance construction in the field is poor

[0008] Disadvantages: It is not suitable for detection in complex environments such as urban roads with many vehicles, underground tunnel facilities such as subways, and many pedestrians. The ability to identify different third-party sabotage behaviors (manual excavation, blasting, mechanical excavation, etc.) is poor

[0009] Therefore, in the actual engineering design and construction of gas pipelines to prevent third-party damage, the current single-use solution of any one of the two detection technologies cannot meet the needs of long-distance gas pipelines across cities, countryside, rivers, bridges and other natural environments. Under the conditions of high accuracy, low false alarm rate, reasonable construction and maintenance costs, etc.

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