CAJ | 학술논문

脉冲涡流是一种有效的电磁无损检测技术.基于脉冲涡流检测原理设计了脉冲涡流检测系统,并对矩形脉冲涡流传感器的三维磁场量进行了研究.分别在传感器的不同走向下,使用三维检测传感器获得了三维磁场量的B_x、B_y与B_z曲线.在传感器的不同走向下,提出使用三维蝶形图对缺陷进行检测识别.对三维信号进行特征分析后,分别在不同走向下,通过B_z曲线评估缺陷的深度.通过B_y与B_z曲线的特征可以测量缺陷的长度.为进一步实现飞机机身缺陷的成像检测提供了有价值的参考.
맥충와류시일충유효적전자무손검측기술.기우맥충와류검측원리설계료맥충와류검측계통,병대구형맥충와류전감기적삼유자장량진행료연구.분별재전감기적불동주향하,사용삼유검측전감기획득료삼유자장량적B_x、B_y여B_z곡선.재전감기적불동주향하,제출사용삼유접형도대결함진행검측식별.대삼유신호진행특정분석후,분별재불동주향하,통과B_z곡선평고결함적심도.통과B_y여B_z곡선적특정가이측량결함적장도.위진일보실현비궤궤신결함적성상검측제공료유개치적삼고.
Pulsed eddy current (PEC) is an effective method that has been demonstrated to be capable of detecting and quantifying defects. Based on the principle of PEC technique, a novel PEC testing probe consisting of a rectangular sensor and three pick-up coils was designed. Three-dimensional magnetic field of rectangular PEC sensor is researched and B_x, B_y and B_z peak waves of 3D magnetic field are obtained in the different scanning directions. Defect can be identified effectively by setting safety zone in 3D butterfly-shaped graph. The depth of defect can be evaluated in both directions and the length of defect can be measured quantitatively.