The invention discloses a negative pressure pipeline leakage point detection and targeted repair
system and method, and the method achieves the confirmation of a pipeline leakage point through a detection end, and achieves the repair of the pipeline leakage point through a repair end. The detection end comprises a distributed
optical fiber, an unmanned aerial vehicle and a control platform; through distributed optical fibers laid along a pipeline, pipeline vibration and temperature abnormity are monitored in real time, a leakage area is preliminarily positioned, then
infrared scanning is performed on a suspicious area through an unmanned aerial vehicle carrying a high-precision
thermal infrared imager, a temperature field
distribution diagram is generated and uploaded to a control platform, and the control platform outputs leakage point coordinates through a data fusion
algorithm; the repairing end comprises self-repairing gel and a magnetic control
robot; the small cracks with the width smaller than 1 mm are externally sprayed with self-repairing gel, and
laser curing is conducted after the cracks are sucked in through negative pressure; for large cracks with the width larger than or equal to 1 mm, the magnetic control
robot is put into the pipeline, resin is sprayed to the inner wall of the pipeline, and
ultraviolet curing is conducted. The
system and the method can remarkably improve the maintenance efficiency of the negative pressure pipeline.