摘要
针对管道内检测器在运行过程中的跟踪定位问题,提出了基于低频电磁的管道内检测器跟踪定位方法,分析了低频磁信号传播特性和发射线圈磁场分布特点,设计了搭载在管道内检测器上的低频磁信号发射机和手持式低频磁信号接收机.采用高磁导率坡莫合金管作为发射线圈磁芯,减少了涡流损耗,采用串联谐振提高了发射效率;设计感应式接收线圈,通过并联谐振提高了信号接收范围和信噪比.结果表明,该跟踪定位系统具有良好的稳定性和可靠性,接收信号具有对称特性.在实际工程应用中,该系统有效定位距离可达8 m,提高了管道内检测器跟踪定位范围.
Aiming at the tracking and positioning problem of pipeline internal detector in its operating process,a lowfrequence electromagnetic tracking and positioning method for the pipeline internal detector was proposed,and the propagation characteristics of lowfrequency magnetic signal and the distribution characteristics of magnetic field generated by the launch coil were analyzed. In addition,a lowfrequency magnetic signal transmitter mounted on the pipeline internal detector and a portable lowfrequency 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 showthat 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 is8 m,and the tracking and positioning range of pipeline internal detector gets improved.
出处
《沈阳工业大学学报》
EI
CAS
北大核心
2018年第1期48-53,共6页
Journal of Shenyang University of Technology
基金
国家自然科学基金资助项目(61571308)
科技部国家重大仪表专项基金资助项目(2012YQ090175)
辽宁省教育厅资助项目(L2015388)
关键词
低频
发射线圈
接收线圈
管道内检测
跟踪定位
串联谐振
并联谐振
涡流损耗
low frequency
launch coil
receiving coil
pipeline internal detection
tacking andpositioning
series resonance
paallel resonance
eddy current loss
