Pipeline Location Method Based on Pipeline Current Mapper and Its Hardware Realization

Based on the pipeline current mapper method, this paper designs a sensing system using tunneling magnetoresistance sensors and proposes a scheme that can accurately locate the pipeline in real-time. By detecting the time difference between the magnetic signals of different frequencies around the pipeline and the reference signals, the relative position (left or right) of the pipeline is judged. By measuring the amplitude relationship of magnetic induction intensity in different directions around the pipeline, the horizontal distance and plumb distance between the pipeline and the detection equipment are calculated.