CAJ | 학술논문

研究了对带包覆层管道的内部腐蚀进行脉冲涡流检测时，接收线圈的位置变化对检测灵敏度的影响，进行了探头置于激励线圈下不同位置的有限元仿真和试验研究。有限元仿真结果表明：在轴向和周向2个方向都是当检测线圈位于激励线圈边缘正下方时检测效果最好，其灵敏度分别为0.61、0.60。验证试验表明：在轴向和周向2个方向上，最佳检测位置都是位于激励线圈边缘正下方，其灵敏度分别为0.26、0.27。试验结果与仿真结果基本一致，表明接收线圈在激励线圈外边缘正下方附近时，检测灵敏度达到最大。研究结果有助于带包覆层管道腐蚀的脉冲涡流检测的传感器设计。
연구료대대포복층관도적내부부식진행맥충와류검측시，접수선권적위치변화대검측령민도적영향，진행료탐두치우격려선권하불동위치적유한원방진화시험연구。유한원방진결과표명：재축향화주향2개방향도시당검측선권위우격려선권변연정하방시검측효과최호，기령민도분별위0.61、0.60。험증시험표명：재축향화주향2개방향상，최가검측위치도시위우격려선권변연정하방，기령민도분별위0.26、0.27。시험결과여방진결과기본일치，표명접수선권재격려선권외변연정하방부근시，검측령민도체도최대。연구결과유조우대포복층관도부식적맥충와류검측적전감기설계。
Effect of the detection sensitivity caused by the location change of the receiving coil is studied on the internal corrosion of ferromagnetic pipe under insulation with pulsed eddy current ( PEC ) non-destructive testing. Finite element model was established of ferromagnetic pipe under insulation to analyze the effect of position of receiving coil on the pulsed eddy current testing results. The simulation results show that the sensitivity will reach maximum both axial and circumferencial directions when receiving coil is right under the outer edge of the exciting coil, the sensitivities 0. 61 and 0. 60 respectively. The verification experiment results show that:putting receiving coil right under the outer edge of the exciting coil will get the best test results, the sensitivities 0. 26 and 0. 27 respectively. The experimental results agree well with the simulations and show that the detection sensitivity will reach maximum when receiving coil is right under the outer edge of the exciting coil, which will be of help to probe design in the corrosion detection of the pipe under insulation with PEC.