Wire break is one of the primary factors affecting the structural health and operation of pipelines.To ensure the safe and normal operation of PCCP pipelines,this paper proposes a PCCP wire break monitoring system based on distributed optical fiber sensing.By deploying a sensing optical cable on the inner wall of the pipeline,the system can achieve comprehensive and rapid detection of wire break events that compromise pipeline performance,without any blind spots.Experiments simulated pipeline wire break,and the results showed that during wire break in an empty pipe,signal frequencies mainly ranged from 300 to 1000Hz,with an overall increase in high-frequency energy compared to pre-break levels.When the pipeline contained water,the energy proportion near 1000Hz decreased,with some energy shifting to higher frequencies,primarily concentrated around the 3000Hz,4300Hz,and 4700Hz bands.These findings provide sample support for subsequent deep learning analysis of wire break signal characteristics and improving the accuracy of wire break identification.
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