Low frequency electromagnetic tracking and positioning technology for pipeline internal detector
YANG Li-jian
SHEN Han
GAO Song-wei
LIU Bin
Abstract：Aiming at the tracking and positioning problem of pipeline internal detector in its operating process, a low frequence electromagnetic tracking and positioning method for the pipeline internal detector was proposed, and the propagation characteristics of low frequency magnetic signal and the distribution characteristics of magnetic field generated by the launch coil were analyzed. In addition, a low frequency magnetic signal transmitter mounted on the pipeline internal detector and a portable low frequency magnetic signal receiver were designed. The permalloy with high magnetic permeability was taken as the magnetic core of launch coil to reduce the eddy current loss, and the series resonance was used to improve the emission efficiency. The induction type receiving coil was designed, and the signal receiving range and signal noise ratio were improved through adopting the parallel resonance. The results show that the proposed tracking and positioning system has good stability and reliability, and the received signal has the symmetrical characteristics. In the practical engineering application, the effective positioning distance of the system is 8 m, and the tracking and positioning range of pipeline internal detector gets improved.
Keywords：low frequencylaunch coilreceiving coilpipeline internal detectiontracking and positioningseries resonanceparallel resonanceeddy current loss
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 48-53 )